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INTEGRATED CIRCUITS
DATA SHEET
TEA6821T ICE car radio
Preliminary specification File under Integrated Circuits, IC01 September 1993
Philips Semiconductors
Preliminary specification
ICE car radio
FEATURES General * FM mixer for conversion from FM IF1 = 72.2 MHz to FM IF2 = 10.7 MHz * AM mixer for conversion from AM IF1 = 10.7 MHz to AM IF2 = 450 kHz * FM IF gain stage * Crystal oscillator providing mixer frequencies and references for IF count and stereo decoder * FM quadrature demodulator with automatic centre frequency adjust and THD compensation * Level and multipath and noise detectors * Soft mute * Stereo noise cancelling and variable de-emphasis * PLL stereo decoder * Noise blanker * AM IF amplifier and demodulator * I2C-bus transceiver * IF count for AM and FM * Reference frequency generation for PLL synthesizer * Reduced external components * SW applicable. QUICK REFERENCE DATA SYMBOL Vs1 Vs1 Is1 Is1 Vs2 Vs2 Is2 Is2 S+N/N THD S+N/N THD Tamb PARAMETER supply voltage 1 (pins 56 and 28) operating range supply current 1 FM supply current 1 AM supply voltage 2 (pin 5) operating range supply current 2 FM supply current 2 AM signal-to-noise AM distortion AM signal-to-noise FM distortion FM channel separation (adjusted) operating ambient temperature f = 75 kHz m = 0.3 note 1 note 1 CONDITIONS MIN. 7 8.1 - - 4.5 4.75 - - - - f = 22.5 kHz at pins 43 and 47 66 - 40 -40 TYP. 8.5 8.5 28 24 5.0 5.0 31 28 57 1 72 0.1 - - GENERAL DESCRIPTION Stereo decoder * Adjustment-free PLL-VCO
TEA6821T
* Pilot depending mono/stereo switching * Analog control of mono/stereo blend * Adjacent channel noise suppression (114 kHz) * Pilot canceller * Analog control of de-emphasis * Integrated low-pass filters for 190 kHz adjacent channel interferences and signal delay for interference absorption circuit.
The TEA6821T together with the TEA6810T / TEA6811T forms an AM/FM electronic tuned car radio in a double conversion receiver concept for European, American and Japanese frequency range.
MAX. 10 8.9 - - 5.5 5.25 - - - 2 - 0.35 - +85
UNIT V V mA mA V V mA mA dB % dB % dB C
Note to the quick reference data 1. IC is functional, specified parameters may deviate from limits which are valid for operating range.
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Preliminary specification
ICE car radio
ORDERING INFORMATION TYPE NUMBER TEA6821T PACKAGE NAME VSO56 DESCRIPTION plastic very small outline package; 56 leads
TEA6821T
VERSION SOT190-1
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Preliminary specification
ICE car radio
TEA6821T
Fig.1 Block diagram (continued in Fig.2).
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ICE car radio
TEA6821T
Fig.2 Block diagram (continued from Fig.1).
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ICE car radio
TEA6821T
Fig.3 ICE91 application diagram (continued in Fig.4).
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ICE car radio
TEA6821T
Fig.4 ICE91 application diagram (continued from Fig.3).
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Preliminary specification
ICE car radio
TEA6821T
Fig.5 AM/FM car radio receiver with TEA6811T and TEA6821T (continued in Fig.6).
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Preliminary specification
ICE car radio
TEA6821T
Fig.6 AM/FM car radio receiver with TEA6811T and TEA6821T (continued from Fig.5).
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Preliminary specification
ICE car radio
PINNING SYMBOL QDET1 QDET2 TSWITCH GND VP5 HFBUS1 HFBUS2 XTAL1 XTAL2 FREFP FREFN IREF FMIF1IN1 FMIF1IN2 TSDR TSDS VSDS VSDR FMIF2OUT1 FMIF2OUT2 VREF AMIF2OUT1 AMIF2OUT2 FMAMDEC PHASEDET PILDET FMAM10.7 VPIF PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 DESCRIPTION demodulator tank demodulator tank time switch analog ground 5 V supply voltage HF bus, pull-up to 5 V HF bus, pull-up to 5 V crystal oscillator crystal oscillator PLL reference frequency PLL reference frequency reference current 70 MHz FM-IF input 70 MHz FM-IF input time constant for SDR time constant for SDS SDS control voltage SDR control voltage FM mixer output FM mixer output reference voltage AM mixer output AM mixer output FM/AM 10.7 MHz decoupling phase detector pilot detector FM/AM 10.7 MHz input VP IF amplifier SYMBOL FMIFAMPOUT AFGND DEEMPHR DEEMPHL AMIF2IN1 AMIF2IN2 FMIN2 DCFEED FMIN1 LEVELADJ CAFC MPBUF OUTLEFT FMSTOP RDS/AMSTOP OUTRIGHT MPXIN IACIN MPXOUT AMAFOUT VMUTAML LEVELUNWEIG IACCONTR VPDIG SDA SCL BUSGND VP8.5 PIN 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
TEA6821T
DESCRIPTION FM-IF amplifier output AF ground de-emphasis capacitor right de-emphasis capacitor left AM IF2 input 1 AM IF2 input 2 FM limiter input DC feed FM limiter FM limiter input level adjust AFC capacitor multipath buffer time constant AF output left FMSTOP adjust MPX for RDS/AMSTOP adjust AF output right stereo decoder MPX input IAC input FM demodulator MPX output AM demodulator AF output mute voltage / AM level level unweighted IAC control voltage VP digital SDA, pull-up to 5 V SCL, pull-up to 5 V bus ground VP 8.5 V
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Preliminary specification
ICE car radio
TEA6821T
Fig.7 Pin configuration.
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL Vs1 Vs2 Vs3 Tstg Tamb VESD supply voltage 2 (pin 5) supply voltage 3 (pin 52) storage temperature operating ambient temperature electrostatic handling (note 1) for pins 8 and 9 for other pins Note to the limiting values 1. Charge device model class B: discharging a 200 pF capacitor through a 0 series resistor. September 1993 11 - - 100 300 V V PARAMETER supply voltage 1 (pins 56 and 28) MIN. -0.3 -0.3 -0.3 -55 -40 MAX. +12 +6.5 +6.5 +150 +85 V V V C C UNIT
Philips Semiconductors
Preliminary specification
ICE car radio
CHARACTERISTICS V56-4 = V28-4 = 8.5 V, V5-4 = V52-55 = 5 V, Tamb = +25 C unless otherwise specified. SYMBOL Current consumption Is1 I56 I28 I19 + I20 Is1 I56 I22 + I23 Is2 Is3 FM IF path FM mixer R13-14 C13-4, C14-4 Ropt R19-20 C19-4, C20-4 I19IF2/V13-14IF1 I19, I20 V19-20 IP3 Oscillator fosc fosc/T R1 C0 V29-4/V27-24 V27-24 oscillator frequency oscillator spread temperature dependence of oscillator frequency crystal motional resistance crystal shunt capacitance loaded with 330 ; see Fig.9 crystal type PHILIPS 9922 521 00098 - - - - - 61.5 - 30 - - input resistance input capacitance optimum generator resistance output resistance output capacitance conversion gain mixer bias current mixer leakage current maximum output voltage (peak-to-peak value) third order intermodulation in AM position 5 - - 15 - 1.65 2.4 - 12.0 114 7 3 1.2 20 5 1.9 3.0 - 14.0 124 supply current 1 supply current 1at pin 56 supply current 1 at pin 28 supply current 1 at pins 19 and 20 supply current 1 supply current 1at pin 56 supply current 1 at pins 22 and 23 supply current 2 at pin 5 supply current 3 at pin 52 FM AM AM FM 24 16 2.4 4.8 18 9.5 8 18 14 8 30 20 3.0 6.0 24 12 10 21 17 10 PARAMETER CONDITIONS MIN. TYP.
TEA6821T
MAX.
UNIT
36 24 3.6 7.2 30 15 12.5 25 21 12
mA mA mA mA mA mA mA mA mA mA
- 4.5 - - 7 2.2 3.6 2 - - - 250 - 70 5
k pF k k pF mS mA A V dBV
MHz Hz ppm/K pF
FM IF2 amplifier amplifier gain maximum input voltage for 1 dB compression point (RMS value) 8 80 10 110 12 - dB mV
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ICE car radio
TEA6821T
SYMBOL V29-4 R27-24 C27-4, C24-4 R29-4 C29-4 FM IF2 limiter V1-2/V37-35 C37-4 R1-2 C1-2 V1-2 limiter gain
PARAMETER maximum output voltage (RMS value) input resistance input capacitance output resistance output capacitance
CONDITIONS
MIN. 220 300 - 300 - - - - 10 500
TYP. 270 330 - 330 -
MAX. - 360 5 360 5 - 5 1.0 20 -
UNIT mV pF pF
see Fig.10
74 - - 15 700
dB pF k pF mV
input capacitance output resistance output capacitance limiter output voltage (peak-to-peak value)
FM demodulator fmod = 1kHz; deviation = 22.5 kHz; Rg= 50 ; V37-35 = 10 mV; with de-emphasis = 50 S; coil quality = 15 unless otherwise specified. V47-4 R47out B V43-4 R43out B V37-35 V37-35 MPX output (RMS value) output resistance AF bandwidth MPX output for RDS (RMS value) output resistance AF bandwidth start of limiting (RMS value) input voltage for signal-plus-noise-to-noise ratio (RMS value) AF = -3 dB see Fig.11 for pin 47 (MPXOUT) and Fig.12 for pin 43 (RDS/AMSTOP) S+N/N = 26 dB S+N/N = 46 dB S + N/N V43FM/V43AM signal-plus-noise-to-noise ratio suppression f = 22.5 kHz; fmodAM = 1 kHz; mAM = 30%; V37-35 = 3 mV to 300 mV V47FM/V47AM suppression V37-35 = 1 mV to 300 mV 55 60 - dB - - 66 55 40 100 72 60 55 140 - - V V dB dB 160 - 200 160 - 200 - 200 - - 200 - - 40 240 500 - 240 500 - 60 mV kHz mV kHz V
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TEA6821T
SYMBOL THD
PARAMETER total harmonic distortion
CONDITIONS detuning 50 kHz; f = 75 kHz; fmod = 1 kHz without de-emphasis Ldemod = typical value pin 43 V37-35 = 300 V to 800 mV pin 47 V37-35 = 1 mV to 800 mV
MIN.
TYP.
MAX.
UNIT
- - 30
0.1 0.1 34
0.35 0.35 -
% % dB
V43AFCdisabled demodulator frequency control /V43AFCactive (AFC) efficiency at 100 kHz detune from exact tuning V43 residual DC-offset Ldemod = typical value; 10 V < V37-35 < 80 V 80 V < V37-35 < 800 mV Unweighted level voltage BW50 Rout50 V50-4 bandwidth output resistance level unweighted voltage see Fig.13; V38 = 2.52 V; V37-35 2.5 V V37-35 = 1.0 mV V/20 dB V50-4/VK V50 V50-4 /V38-4 R38 V38-4 = V43/V47 /V49 slope of level unweighted voltage V50-4/V37-35 temperature dependence adjusting range adjusting gain input resistance internal bias voltage start of mute mute slope V49/V21 = 0.6 = -6 dB V37-35 100 V (RMS) < 300 mV V37-35 = 1 mV V37-35 = 1 mV (RMS)
- -
100 10 - - 2.4 3.4 0.845 4.0 2 -0.9 80 2.6 3 25
1000 30 - 100 3.2 4.7 0.95 - - - - - - -
mV mV
500 - 1.8 2.7 0.75 - - - - - - -
kHz V V V mV/VK V - k V - dB/V
Adjust of level unweighted voltage and Vmutaml; typical adjusting range see Figs 14 and 17.
Muting dependence on adjust of level unweighted voltage; typical curve see Fig.15.
Soft mute, time constant control, mono/stereo blend and high-cut control Time constant control (see application diagram Fig.3): Slow or fast attack and decay time constants for soft mute, mono/stereo and high-cut control can be chosen connecting pin 3 to GND or pin 21. Mute voltage: The static mute voltage follows the level unweighted voltage as function of FM IF2 voltage and level adjust voltage V38-4. It additionally depends on multipath level, noise (adjacent channel interferences) and the position of Tswitch. Typical curve for mute voltage dependence on V37-35 see Fig.16. V49-4 mute voltage V38 = 2.52 V; V37-35 2.5 V V37-35 = 1.0 mV 1.8 2.7 2.2 3.3 3.2 4.7 V V
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TEA6821T
SYMBOL V/20 dB V49-4/VK I49
PARAMETER
CONDITIONS
MIN. 0.75 - - - - - -
TYP. 0.845 4.0 3.0 -3.6 130 -160 30
MAX. 0.95 - - - - - -
UNIT V mV/VK A A A A kHz
slope of mute voltage V49-4/V37-35 V37-35 100 V (RMS) < 300 mV temperature dependence charge current discharge current charge current discharge current pin 3 connected to pin 21 pin 3 connected to GND; V37-35 = 3 mV; V49 < 2 V; fmod = 60 kHz V37-35 = 1 mV pin 3 connected to GND
Attack and decay time for mute voltage.
f
muting activated by 60 kHz FM interference
Time constant for mono/stereo blend voltage. The mono/stereo blend voltage is generated as a function of FM IF2 voltage, multipath level, noise and position of Tswitch. I16 charge current discharge current charge current discharge current m mono/stereo blend activated by 20 kHz AM interference V37-35 = 3 mV; pin 3 connected to GND V37-35 = 3 mV; pin 3 connected to pin 21 V16 < 2 V; V37-35 = 3 mV; RL16 > 50 M; fmod = 20 kHz; pin 3 connected to GND pin 3 connected to pin 21 f mono/stereo blend activated by 60 kHz FM interference V16 < 3 V; V37-35 = 3 mV; RL16 > 50 M; fmod = 60 kHz; pin 3 connected to GND pin 3 connected to pin 21 - - 30 22 - - kHz kHz - - 45 40 - - % % - - - - 0.5 -18 26 -800 - - - - A A A A
Time constant for high-cut control voltage (SDR). The high-cut control voltage is generated as a function of FM IF2 voltage, multipath level, noise and position of Tswitch. I15 charge current discharge current charge current discharge current m high-cut control activated by 20 kHz AM interference V37-35 = 3 mV; pin 3 connected to GND V37-35 = 3 mV; pin 3 connected to pin 21 V15 < 2 V; V37-35 = 3 mV; RL15 > 50 M; fmod = 20 kHz; pin 3 connected to GND pin 3 connected to pin 21 f high-cut control activated by 60 kHz FM interference V15 < 2 V; V37-35 = 3 mV; RL15 > 50 M; fmod = 60 kHz; pin 3 connected to GND pin 3 connected to pin 21 September 1993 15 - - 25 20 - - kHz kHz - - 40 35 - - % % - - - - 0.4 -0.44 41 -44 - - - - A A A A
Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
SYMBOL Multipath detector fMP BMP V21-4 V21-4 I21 AM IF path
PARAMETER multipath detector band-pass centre frequency band-pass bandwidth
CONDITIONS
MIN. - 7.0
TYP. 20 -
MAX. - -
UNIT kHz kHz
Reference voltage output voltage temperature dependence output current I21 = -1 mA 4.5 - - 5.1 3.3 - 5.7 - 1 V mV/VK mA
AM mixer; fIF1 = 10.7 MHz; fIF2 = 450 kHz; (see Fig.18) R27-24 C27-24 R22-23 C22-23 I22IF2/V27-24IF1 I22, I23 V22-23 IP3 AM oscillator The AM oscillator signal is generated by division of the 61.5 MHz crystal oscillator. Two divider ratios programmable via I2C-bus: division by 6 (AM IF1 = 10.7 MHz), division by 2 (AM IF1 = 30 MHz) AM detector fAMIF2 = 450 kHz; fmod = 400 Hz; m = 30% V48-4 V33-34 S+N/N THD V33-34 R33-34 C24-23 R48out C48out AF output level (RMS value) sensitivity (RMS value) signal-plus-noise-to-noise ratio total harmonic distortion AM IF2 minimum input (RMS value) AM IF2 maximum input (RMS value) IF2 input resistance IF2 input capacitance output resistance output capacitance m = 0.8; 1 mV V24-23 300 mV THD 5%; m = 0.8 RL48 > 500 k; 300 V V33-34 300 mV S+N/N = 26 dB S+N/N = 46 dB - - 54 - - 800 1.8 - 27 - 150 500 57 1.0 - - 2.0 10 33 - 250 700 - 3.0 500 - 2.2 15 39 10 V V dB % V mV k pF k pF 190 240 290 mV input resistance input capacitance output resistance output capacitance conversion gain mixer bias current mixer leakage current maximum output voltage (peak-to-peak value) third order intermodulation in FM position 300 - 10.0 - 2.2 4.0 - 12 - 330 5 20.0 5 2.7 5.0 - 15 137 360 8 - 10 3.4 6.0 2 - - pF k pF mS mA A V dBV
typical AM level curve see Fig.19 Stereo decoder; note 1 Input signal (f = 75 kHz) VMPX (p-p) = 1.7 V; modulation frequency fmod = 1 kHz; de-emphasis time constant = 50 s; nominal input resistor (pin 45) Ri = 168 k. September 1993 16
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Preliminary specification
ICE car radio
TEA6821T
SYMBOL V44-4, V41-4 V44-4/V41-4 Ro44, Ro41 RImin I44, I41 V44-4, V41-4
PARAMETER MPX input overdrive margin AF output voltage (RMS value) difference of output voltage output resistor minimum load resistor maximum output current DC output voltage channel separation (adjusted; a typical roll-off at fMPX = 38 kHz of 1 dB is internally compensated) total harmonic distortion signal-plus-noise-to-noise ratio pilot signal subcarrier
CONDITIONS THD = 1%
MIN. 4 800 - - 12 150 3.3 40
TYP. - 900 - - - - 3.8 -
MAX. - 1000 1 130 - - 4.3 -
UNIT dB mV dB k A V dB
THD S+N/N 19 38 57 76 2 3
(2) (3) (4)
- f = 20 Hz to 20 kHz f = 19 kHz f = 38 kHz f = 57 kHz f = 76 kHz 74 - - - -
0.1 80 50 50 46 60 60 58 70 - 80 70 30 24 20 2
0.3 - - - - - - - - - - - - 30 - -
% dB dB dB dB dB dB dB dB dB dB dB dB mV mV dB
Carrier and harmonic suppression at the output (note to the stereo decoder).
intermodulation traffic radio (ARI) subsidiary communications authorization adjacent channel frequency ripple rejection at output pilot threshold voltage switch hysteresis Vion/Vioff
fmod = 10 kHz; fspur = 1 kHz - fmod = 13 kHz; fspur = 1 kHz - f = 57 kHz f = 67 kHz f = 114 kHz f = 190 kHz fr = 100 Hz; Vr = 100 mVeff stereo on mono on - 70 - - - - 8 - I2C-bus
57(4) 67(5) 114(6) 190(7) rr Vipil Vipil
Mono/stereo control
The stereo decoder can be set to mono via the Pilot presence indication via I2C-bus External Mono/stereo control V17 - 0.75V21
control voltage channel separation
see Fig.21 = 6 dB = 16 dB - - 60 -50 80 -300 -80 -40 - - - - - - - +50 - +300 mV mV dB mV dB mV
Muting functions (mute via mute V44, V41 mute V44, V41
I2C-bus)
tuned mute DC offset voltage radio mute (in combination with tuned mute) DC offset voltage
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TEA6821T
SYMBOL deemph V18 - 0.75V21
PARAMETER control range of de-emphasis control voltage
CONDITIONS
MIN. 50
TYP. - - -300
MAX. 80 - -
UNIT s mV mV
High-cut control (see Fig.22) deemph = 50 s deemph = 80 s The nominal de-emphasis value can be changed to 75 s with C31, C32 = 10 nF. Voltage controlled oscillator The VCO is adjusted by means of a digital auxiliary PLL. fosc Noise blanker Interference detection at pin 50 level unweighted or MPXOUT (pin 47) Tsup fc IAC control I51 Vpulse VDC (pin 51) Vtr (pin 46) VDC (pin 51) Vtr (pin 46) Ios gate input offset current at pins 31 and 32 during suppression pulse duration charge current (into 4 V) discharge current (from 8.5 V) trigger sensitivity trigger threshold measured with fint = 250 kHz pulse = 10 s Vnoise (pin 46) = 10 mV VDC (pin 51) = 7.7 V Vnoise (pin 46) = 100 mV VDC (pin 51) = 6.7 V 5.0 -0.5 - - - - - - 10 -1.0 - 200 10 2.3 100 20 18 -1.8 20 - - - - 50 A mA mV mV mV V V nA interference suppression time high-pass input filter for interference pulse, 2nd order 3 dB frequency - 150 40 200 50 250 s kHz oscillator frequency range 450 456 462 kHz 0 -
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Notes to the characteristics
TEA6821T
1. By changing the value of the input resistor at pin 12 the MPX input can be adapted to the level of the FM demodulator output (see Fig.20). A 3rd order low-pass filter fg = 90 kHz at the MPX input provides extra 190 kHz ACI suppression. For AM the VCO is switched off. Interference gate at MPX demodulator outputs. 2. V 0 ( signal ) ( at 1 kHz ) 2 = ---------------------------------------------------------------------- ; f s = ( 2 x 10 kHz ) - 19 kHz V 0 ( spurious ) ( at 1 kHz ) V 0 ( signal ) ( at 1 kHz ) 3 = ---------------------------------------------------------------------- ; f s = ( 3 x 13 kHz ) - 38 kHz V 0 ( spurious ) ( at 1 kHz ) V 0 ( signal ) ( at 1 kHz ) 57 ( ARI ) = -------------------------------------------------------------------------------------------------V 0 ( spurious ) ( at 1 kHz 23 Hz ) V 0 ( signal ) ( at 1 kHz ) 67 = ------------------------------------------------------------------------ ; f s = ( 2 x 38 kHz ) - 67 kHz V 0 ( spurious ) ( at 9 kHz ) V 0 ( signal ) ( at 1 kHz ) 114 = ------------------------------------------------------------------------ ; f s = 110 kHz - ( 3 x 38 kHz ) V 0 ( spurious ) ( at 4 kHz ) V 0 ( signal ) ( at 1 kHz ) 190 = ------------------------------------------------------------------------ ; f s = 186 kHz - ( 5 x 38 kHz ) V 0 ( spurious ) ( at 4 kHz )
3.
4.
5.
6.
7.
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TEA6821T
Fig.8 Test circuit FM mixer.
Fig.9 Test circuit IF amplifier.
Fig.10 Test circuit limiter gain.
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TEA6821T
Fig.11 Signal and noise of muted MPX voltage.
Fig.12 Signal and noise of unmuted MPX voltage.
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TEA6821T
Fig.13 Level unweighted voltage (typical curve).
Fig.14 Adjustment range level unweighted voltage.
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TEA6821T
Fig.15 Muting dependence on adjust of level unweighted voltage (typical curve).
Fig.16 Typical mute voltage as function of FM IF2 voltage.
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TEA6821T
Fig.17 Adjustment range mute voltage.
Fig.18 Test circuit AM mixer.
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TEA6821T
Fig.19 Signal, noise and distortion of AM AF output voltage and AM level voltage (typical curve).
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TEA6821T
Fig.20 Adaption of MPX input to FM-demodulator output level by variation of the input resistor.
Fig.21 Channel separation as function of control voltage.
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TEA6821T
Fig.22 High-cut as function of control voltage.
I2C-BUS SPECIFICATION AND I2C-BUS CONTROLLED FUNCTIONS I2C-bus specification The standard I2C-bus specification is expanded by the following definitions. Structure of the I2C-bus logic: slave transceiver with auto increment and expansion to switch a direct transfer of all transmissions to an output for the radio front end IC (TEA6810T respectively TEA6811T). Subaddresses are not used. Data transfer to the TEA6821T Data sequence: address byte 1 byte 2 The data transfer has to be only in this order. The transfer direction of the data bytes is defined by the LSB of the address. The data becomes valid at the output of the internal latches with the acknowledge of each byte. A stop condition after any byte can shorten transmission times. When writing to the transceiver by using the stop condition before completion of the whole transfer: * The remaining bytes will contain the old information * If the transfer of a byte was not completed, this byte is lost and the previous information is available.
Data transfer to an output of the front end IC. A data bit in the transceiver of the TEA6821T enables or disables a direct transfer of all transmissions to an interface stage for the front end IC. For a transmission to the front end IC the address and the data format of the front end IC has to be used. Hint: The pull-up resistors for the front end interface (pins 6 and 7) should not be connected to the 5 V supply voltage of the front end IC, otherwise a bus pull-down (pin 53) can occur during switching off the front end supply when the interface stage is enabled. Data transfer to the IF IC (TEA6821T) is independent of the state of interface stage for the front end IC.
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General specification bus address of the TEA6821T subaddress hardware (pin) programmable address bits default settings by power-on reset 1100 001X not used not available
TEA6821T
radio mute and 40 ms IF count time is enabled, all other bits are random
I2C-bus data Data to be received by the IC data byte 1 bit 0 bit 1 bit 2 bit 3 bit 4 bit 5 bit 6 bit 7 data byte 2 bit 0 bit 1 bit 2 bit 3 bit 4 bit 5 bit 6 bit 7 data byte 1(1) switch for mono: bit 0 = 1; stereo: bit 0 = 0 LSB reference frequency for synthesizer; see Table 1 reference frequency for synthesizer; see Table 1 MSB reference frequency for synthesizer; see Table 1 tuning mute, bit 4 = 1: off; bit 4 = 0: on SDS/SDR hold, bit 5 = 1: off; bit 5 = 0: on radio mute, bit 6 = 1: off; bit 6 = 0: on I2C-bus to front end, bit 7 = 1: enabled; bit 7 = 0: disabled AM/FM, bit 0 = 0: AM; bit 0 = 1: FM divider for AM mixer, bit 1 = 0: division by 2; bit 1 = 1: division by 6 measure time IF count, bit 2 = 0: 40 ms; bit 2 = 1: 4 ms SDR off, bit 3 = 0: SDR off; bit 3 = 1: SDR on not used not used not used not used
Data to be transmitted by the IC bit 0 bit 1 bit 2 bit 3 bit 4 bit 5 bit 6 bit 7 LSB level information level information MSB level information LSB multipath information multipath information MSB multipath information bit 6 = 1: stereo pilot presence not used
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data byte 2 bit 0 bit 1 bit 2 bit 3 bit 4 bit 5 bit 6 bit 7 Note LSB of the IF-counter IF-counter IF-counter IF-counter IF-counter IF-counter IF-counter MSB of the IF-counter
TEA6821T
1. The A/D conversion for multipath and level will be done while a transmission of any address to the I2C-bus. Table 1 BIT 3 0 0 0 0 1 1 1 1 Reference frequency setting in byte 1 BIT 2 0 0 1 1 0 0 1 1 BIT 1 0 1 0 1 0 1 0 1 3 kHz 5 kHz 10 kHz 15 kHz 25 kHz 50 kHz not defined not defined REFERENCE FREQUENCY
Reference frequency generation; note 1 DIVISION RATIO 20500 12300 6150 4100 2460 1230 Note 1. All specified frequencies are valid for a crystal oscillator frequency of 61.5 MHz. REFERENCE FREQUENCY (kHz) 3 5 10 15 25 50
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Output signal of reference frequency divider SYMBOL C10-4, C11-4 R10-52, R11-52 V10-11 V10-4, V11-4 IF-counter; note 1 SYMBOL V33-34 V37-35 Note 1. Counting windows AM: 4 ms, (40 ms); FM: 40 ms, 4 ms Counting resolution AM: 250 Hz, (25 Hz); FM: 5 kHz, 50 kHz IF-prescaler AM: division by 1; FM: division by 200 IF-counter sensitivity for FM PARAMETER IF-counter sensitivity for AM, m = 0 output capacitance output resistance differential output voltage (peak-to-peak value) single-ended output voltage (peak-to-peak value) PARAMETER - 800 0.3 0.15 MIN. - 1000 0.4 0.2 TYP.
TEA6821T
MAX. 4 1200 0.5 0.3
UNIT pF V V
MIN. 200 200
UNIT V V
The IF-count windows are valid for a crystal oscillator frequency of 61.5 MHz. The FM/AM switching is done by bit 0 of byte 2 of the received data of the IC. The IF-counter operates continuously. The IF-counter and window-counter will be resetted when the I2C-bus logic detects the address of the IC. This disables changes in the latches for the IF-count, while reading this value. If the transmission to the front end IC will be disabled after the synthesizer loop of the TEA6811T front end IC has locked for a new frequency, the IF-count will be available after the set measuring time. The IF-counter starts at 0. The IF-counter output are the 8 least significant bits of the counting result.
Fig.23 IF-counter structure.
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A/D converters for level and multipath voltage SYMBOL A/D converter for FM level information The FM level information V50-3 is A/D converted with 3 bit V50-4 FM stop Vstop variation of stop level as function of V42-4 - 30 - AD conversion step size - 6 - PARAMETER MIN. TYP.
TEA6821T
MAX.
UNIT
dB/step dB/V
A/D converter for AM level information The AM level information V49-4 is A/D converted with 3 bit V49-4 AM stop Vstop variation of stop level as function of V43-4 - 30 - dB/V A/D converter for multipath information The multipath information V40-4 is A/D converted with 3 bit covering an IF2 amplitude modulation range 0.15 m 0.9; fmod = 20 kHz m multipath conversion step 0 multipath conversion step 1 multipath conversion step 2 multipath conversion step 3 multipath conversion step 4 multipath conversion step 5 multipath conversion step 6 multipath conversion step 7 - - - - - - - - - 15 30 40 50 58 66 74 - - - - - - - - % % % % % % % % AD conversion step size - 6 - dB/step
September 1993
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Philips Semiconductors
Preliminary specification
ICE car radio
Table 2 PIN NO. 1 2 Equivalent pin circuits and pin voltages. DC VOLTAGE (V) PIN NAME AM QDET1 QDET2 4.0 4.0 4.0 4.0 FM
TEA6821T
INTERNAL CIRCUIT
3
TSWITCH
open
0/V21
4 5 6
GND VP5 HFBUS1 5.0 5.0 5.0 5.0
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Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 7
DC VOLTAGE (V) PIN NAME AM HFBUS2 5.0 5.0 FM INTERNAL CIRCUIT
8 9
XTAL1 XTAL2
4.1 4.1
4.1 4.1
10 11
FREFP FREFN
4.9 4.9
4.9 4.9
September 1993
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Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 12 IREF
DC VOLTAGE (V) PIN NAME AM 4.3 4.3 FM INTERNAL CIRCUIT
13 14
FMIFIN1 FMIFIN2
2.3 2.3
2.3 2.3
15
TSDR
0.7 - 5.5
0.7 - 5.5
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Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 16
DC VOLTAGE (V) PIN NAME AM TSDS 0.7 - 5.5 FM 0.7 - 5.5 INTERNAL CIRCUIT
17
VSDS
3.0 - 5.5
3.0 - 5.5
18
VSDR
3.0 - 5.5
3.0 - 5.5
September 1993
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Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 19 20
DC VOLTAGE (V) PIN NAME AM FMIF2OUT1 FMIF2OUT2 8.5 8.5 8.5 8.5 FM INTERNAL CIRCUIT
21
VREF
5.1
5.1
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Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 22 23
DC VOLTAGE (V) PIN NAME AM AMIF2OUT1 AMIF2OUT2 8.5 8.5 8.5 8.5 FM INTERNAL CIRCUIT
24
FMAMDEC
3.0
3.0
25
PHASEDET
3.0 - 7.0
3.0 - 7.0
September 1993
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Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 26
DC VOLTAGE (V) PIN NAME AM PILDET 0.7 FM 0.7 - 7.0 INTERNAL CIRCUIT
27
FMAM10.7
3.0
3.0
28 29
VPIF FMIFAMPOUT
8.5 6.0
8.5 6.0
30
AFGND
3.6
3.6
September 1993
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Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 31
DC VOLTAGE (V) PIN NAME AM DEEMPHR 2.3 2.3 FM INTERNAL CIRCUIT
32
DEEMPHL
2.3
2.3
33 34
AMIF2IN1 AMIF2IN2
2.7 2.7
0.7 0.7
September 1993
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Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 35
DC VOLTAGE (V) PIN NAME AM FMIN2 0.7 2.7 FM INTERNAL CIRCUIT
36 37
DCFEED FMIN1
2.7 0.7
2.7 2.7
38
LEVELADJ
2.6
2.6
39
CAFC
1.0 - 2.2
1.0 - 7.0
September 1993
40
Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 40
DC VOLTAGE (V) PIN NAME AM MPBUF 0.7 - 6.0 FM 0.7 - 6.0 INTERNAL CIRCUIT
41
OUTLEFT
3.6
3.6
42
FMSTOP
0 - 5.2
0 - 5.2
43
RDS/AMSTOP
0 - 5.2
3.0
September 1993
41
Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 44
DC VOLTAGE (V) PIN NAME AM OUTRIGHT 3.6 3.6 FM INTERNAL CIRCUIT
45
MPXIN
2.8
2.8
46
IACIN
0
0
47
MPXOUT
0
3.0
September 1993
42
Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 48
DC VOLTAGE (V) PIN NAME AM AMAFOUT 3.7 4.8 FM INTERNAL CIRCUIT
49
VMUTAML
1.0 - 5.5
1.0 - 5.5
50
LEVELUNWEIG
1.0 - 7.0
1.0 - 7.0
51
IACCONTR
0
6.0
52
VPDIG
5.0
5.0
September 1993
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Philips Semiconductors
Preliminary specification
ICE car radio
TEA6821T
PIN NO. 53
DC VOLTAGE (V) PIN NAME AM SDA 5.0 5.0 FM INTERNAL CIRCUIT
54
SCL
5.0
5.0
55 56
BUSGND VP8.5
0 8.5
0 8.5
September 1993
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Philips Semiconductors
Preliminary specification
ICE car radio
PACKAGE OUTLINE VSO56: plastic very small outline package; 56 leads
TEA6821T
SOT190-1
D
E
A X
c y HE vM A
Z 56 29
Q A2 A1 pin 1 index Lp L 1 e bp 28 wM detail X (A 3) A
0
5 scale
10 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 3.3 0.13 A1 0.3 0.1 0.012 0.004 A2 3.0 2.8 0.12 0.11 A3 0.25 0.01 bp 0.42 0.30 c 0.22 0.14 D (1) 21.65 21.35 E (2) 11.1 11.0 e 0.75 HE 15.8 15.2 L 2.25 0.089 Lp 1.6 1.4 0.063 0.055 Q 1.45 1.30 v 0.2 w 0.1 y 0.1 Z (1) 0.90 0.55
0.017 0.0087 0.85 0.012 0.0055 0.84
0.44 0.62 0.0295 0.43 0.60
0.057 0.035 0.008 0.004 0.004 0.051 0.022
7 0o
o
Note 1. Plastic or metal protrusions of 0.3 mm maximum per side are not included. 2. Plastic interlead protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT190-1 REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION
ISSUE DATE 96-04-02 97-08-11
September 1993
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Philips Semiconductors
Preliminary specification
ICE car radio
SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our "IC Package Databook" (order code 9398 652 90011). Reflow soldering Reflow soldering techniques are suitable for all VSO packages. Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 C. Wave soldering
TEA6821T
Wave soldering techniques can be used for all VSO packages if the following conditions are observed: * A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. * The longitudinal axis of the package footprint must be parallel to the solder flow. * The package footprint must incorporate solder thieves at the downstream end. During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Maximum permissible solder temperature is 260 C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 C within 6 seconds. Typical dwell time is 4 seconds at 250 C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. Repairing soldered joints Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 C.
September 1993
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Philips Semiconductors
Preliminary specification
ICE car radio
DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values
TEA6821T
This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. PURCHASE OF PHILIPS I2C COMPONENTS
Purchase of Philips I2C components conveys a license under the Philips' I2C patent to use the components in the I2C system provided the system conforms to the I2C specification defined by Philips. This specification can be ordered using the code 9398 393 40011.
September 1993
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