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Ordering number : EN4715A
Monolithic Linear IC
LA1193M, 1193V
High-Performance FM Front End for Car Radios
Overview
The LA1193M and LA1193V are front-end ICs developed for use in car radios. It incorporates an extremely wide dynamic range mixer and a new AGC system consisting of a dual-system wide-band AGC and a new keyed AGC to provide excellent interference suppression characteristics.
* Improved temperature characteristics -- Conversion gain -- AGC sensitivity -- Antenna damping drive output current
Package Dimensions
unit: mm 3036B-MFP20
Functions
* * * * * * * * Double-balance mixer Pin diode drive output Differential IF amplifier Dual-system wide-band AGC circuit Local buffer output 3D-AGC system FET gate drive AGC output IF amplifier gain control pin
[LA1193M]
Features
* Improved interference characteristics -- Expanded mixer input dynamic range Mixer input usable sensitivity: 15 dB Mixer input I.M. QS: 90 dB (The dynamic range has been increased by 6 dB over the earlier LA1175M.) -- Development of a new wide-band AGC circuit Improved interference characteristics for both nearchannel interference and far-channel interference Improved interference characteristics for the TV band -- Development of a 3D-AGC system The adjacent channel two-signal interference characteristics can be effectively improved without degrading the strong-field three-signal interference characteristics during keyed AGC operation. * Improved stability design -- AGC circuit local oscillator isolation Measures were taken to prevent the deterioration of AMR, noise level, THD and other characteristics during AGC operation. -- AGC circuit incorrect operation measures The LA1193M provides methods to prevent incorrect operation due to local oscillator injection and loss of DC balance.
unit: mm 3179A-SSOP20
[LA1193V]
SANYO: SSOP20
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
31097HA (OT)/61094TH(OT) A8-9997 No. 4715-1/21
LA1193M, 1193V
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Symbol VCC max VCC max mix Pd max Allowable power dissipation Pd max Operating temperature Storage temperature Topr Tstg VCC for pins 5 and 17 VCC for pins 10 and 11 LA1193M: (Ta 70C) Mounted on a 41 x 30 x 1.1 mm glass-Epoxy board
3
Conditions
Ratings 9 15 500
Unit V V mW
LA1193V: (Ta 70C) Mounted on a 23 x 36 x 1.6 mm glass-Epoxy board
3
500 -40 to +85 -40 to +125
mW C C
*
Note: * Connect a resistor (up to 10 k) between pins 17 and 19.
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCC op Conditions Ratings 8.0 7.6 to 9 Unit V V
Operating Characteristics at Ta = 25C, VCC = 8.0 V, in the specified test circuit, f = 88 MHz, fOSC = 77.3 MHz
Ratings Parameter Current drain Antenna damping current AGC high voltage AGC low voltage Saturation output voltage -3 dB limiting sensitivity Conversion gain Local buffer output Narrow VAGC-ON Wide VAGC-ON Symbol ICCO ANT-DI VAGC-H VAGC-L VOUT Vi-Limit A. V VOSC-Buff V-NAGC V-WAGC Conditions No input, VCONT = 0 V 88 MHz, 100 dB, VCONT = 4.0 V 88 MHz, 0 dB, VCONT = 4.0 V 88 MHz, 100 dB, VCONT = 4.0 V 88 MHz, 110 dB, VCONT = 4.0 V 88 MHz, 110 dB, VCONT = 4.0 V 88 MHz, 75 dB, VCONT = 4.0 V No input, no modulation 88 MHZ, VCONT = 4.0 V, at an input level such that VAGC-OUT is 2 V or less 88 MHZ, VCONT = 0 V, at an input level such that VAGC-OUT is 2 V or less 88 MHZ, VCONT variable, with 95 dB being the VCONT voltage input such that VAGC-OUT switches from high to low and 2.0 V as the VAGC threshold value. 97 78 98 105 73 (76) 97 min 19 7.0 7.6 typ 24 9.5 7.9 0.4 110 85 101 109 80 (83) 101 87 (90) 105 92 104 0.9 max 29 12.5 Unit mA mA V V dB dB dB dB dB
dB
3D-AGC-ON
V3D-AGC
0.4
0.6
0.8
V
Note: Values in parenthesis are for LA1193V.
No. 4715-2/21
LA1193M, 1193V Block Diagram and Test Circuit Diagram
Unit (Resistance: , Capacitance: F)
Application Circuit: USA and Europe
Unit (Resistance: , Capacitance: F)
No. 4715-3/21
LA1193M, 1193V Application Circuit: Japan
Coil Specifications Coils Manufactured by Sumida Electronics Japan band RF coil SA-129 or SA-143
Unit (Resistance: , Capacitance: F)
Japan oscillator coil SA-125
Japan antenna coil SA-123 or SA-144
US band RF coil SA142 or SA-250
Continued on next page. No. 4715-4/21
LA1193M, 1193V
Continued from preceding page.
US band antenna coil SA-140 or SA-231
US band oscillator coil SA-278
Mixer coil (for both bands) SA-266
Pin Functions
Pin No. Function Equivalent circuit Note
1
OSC BUFF
2 3 4 5
OSC Tr. base OSC GND OSC Tr. emitter OSC VCC Colpitts oscillator
Continued on next page. No. 4715-5/21
LA1193M, 1193V
Continued from preceding page.
Pin No. Function Equivalent circuit Note
Mixer input usable sensitivity 15 dB 6 7 10 11 Mix input (1) Mix input (2) Mix out (1) Mix out (2) Mixer input I.M. QS 90.5 dB (6.5 dB higher than previous products) Conversion gain 15 dB Input impedance 25
9
Antenna damping drive output
IANTD = 10 mA
12
IF GND
8
W-AGC input
Since the DC cut capacitor is provided on-chip in the pin internal circuit, we have taken steps to prevent incorrect AGC operation due to inter-pin leakage currents.
Continued on next page. No. 4715-6/21
LA1193M, 1193V
Continued from preceding page.
Pin No. Function Equivalent circuit Note
13
N-AGC input
Since the DC cut capacitor is provided on-chip in the pin internal circuit, we have taken steps to prevent incorrect AGC operation due to inter-pin leakage currents.
14 15 18 19
IF AMP bypass IF AMP input IF AMP output IF AMP gain adjust
IF gain: 25 dB Input and output impedances of 330 The IF gain can be adjusted by inserting a resistor between pins 17 and 19. The gain is at its maximum when there is no resistor inserted.
16
RF AGC output
MOSFET Second gate control
17
IF, AGC, VCC
20
Keyed AGC input
Controls the narrow AGC.
No. 4715-7/21
LA1193M, 1193V 1. Oscillator Circuit Steps were taken to prevent AMR degradation during earlier product type AGC operation, since the local oscillator block in this IC has independent Vd (pin 5) and ground (pin 3) connections. This is a Colpitts oscillator and has the same structure as that used in earlier circuits. The oscillation level and intensity are changed by capacitors C2-4, C4 and CP.
2. Local Oscillator Buffer Output This buffer is an emitter follower circuit. If desired, the buffer efficiency can be increased by inserting a resistor between pin 1 and ground to pass more current through the buffer transistor. However, this current must be limited so that Pdmax for the package is not exceeded. 3. Interference Characteristics The LA1193M incorporates a newly developed 3D-AGC (triple dimension) circuit. This circuit allows three-signal interference characteristics (inter-modulation characteristics) and two-signal sensitivity suppression characteristics to be provided at the same time, a combination of characteristics previously thought difficult to achieve. * Inter-Modulation Characteristics The LA1193M prevents inter-modulation distortion by applying two wide-band AGC circuits.
Figure 1
No. 4715-8/21
LA1193M, 1193V This double wide-band AGC system consists of two AGC circuits and a narrow AGC (pin 13 input, mixer input detection type) as shown in Figure 1. Figure 2 shows the antenna input frequency characteristics.
Figure 2 AGC Sensitivity Detuning Characteristics Features of the Double Wide AGC System -- Since this is a mixer input detection wide-band AGC, it prevents the occurrence of intermodulation due to interfering stations with f > 1 MHz. (TV band interference prevention) -- Since this system uses a narrow AGC at the same time, the wide AGC sensitivity can be lowered, thus preventing incorrect operation due to local oscillator injection. -- Optimal sensitivities for any field conditions can be set, since the sensitivities of both the wide and narrow AGC systems can be set by changing the values of external components. -- The input level of the desired station is limited by the narrow AGC. As a result, excessive levels are no longer input to the stages that follow the mixer and the beats at multiples of 10.7 x A are reduced. * Two-Signal Sensitivity Suppression Characteristics Previously, keyed AGC systems were used to provide good intermodulation distortion and two signal sensitivity suppression characteristics at the same time. However, in previous keyed AGC systems, when the desired station would fade or drop out, the wide band AGC level would become essentially zero. As a result, the automatic station selection function would malfunction and blocking oscillation would occur in the presence of strong interfering stations. Thus keyed AGC systems were extremely hard to use in actual practice. Sanyo has developed a new AGC system (3D-AGC) that solves these problems and allows the construction of extremely simple application circuits. The LA1193M/V incorporates this AGC system. What is the 3D-AGC system? It is a system that determines the wide-band AGC level by using information that has the following three frequency characteristics. RF and antenna circuit information Mixer circuit information C, F and selectivity information Mixer input AGC Mixer output AGC S-meter output
Three dimensions
No. 4715-9/21
LA1193M, 1193V 3D-AGC Features
Feature The narrow AGC sensitivity, which operates for f of less than 1.5 MHz, is controlled independently according to the field strength of the desired station. The narrow AGC sensitivity is controlled at V20 values under 2 V. Merit * This is effective as a measure for mitigating two signal sensitivity suppression. * This allows two signal sensitivity suppression to be mitigated without deterioration in the three signal characteristics. * This allows the prevention of incorrect stopping on intermodulation signals during search. * This allows the prevention of intermodulation occurring in the antenna and RF modulation circuits in the presence of strong interfering stations. Prevention of blocking oscillation due to AGC operation is also possible. * This allows optimal settings to match the reception field conditions. * Since the narrow AGC operates at the desired station and at adjacent stations, it is possible to reduce the wide AGC sensitivity. This prevents incorrect AGC operation due to local oscillator injection.
The wide AGC operates even when V20 is zero, i.e., when the desired station does not exist.
The N-AGC and the W-AGC sensitivities can be set independently. The system has two AGC systems, the N-AGC and the W-AGC.
3D-AGC Sensitivity, f and V20 Characteristics
Figure 3 3D-AGC Sensitivity, f and V20 Characteristics -- The W-AGC sensitivity is determined by the antenna RF circuit selectivity independently of V20. -- The N-AGC sensitivity is determined by the antenna, RF and mixer circuit total selectivity when V20 is 0.6 V or greater. It is determined by that selectivity and V20 when V20 is over 0.6 V. -- The improvement in two-signal sensitivity suppression is the shaded area in the total AGC sensitivity and corresponds to the section occupied by the N-AGC.
No. 4715-10/21
LA1193M, 1193V 4. Mixer The mixer circuit used in this IC is a balanced input/balanced output double balance mixer circuit. * Input Format Emitter input Input impedance: 25 Optimization of the component geometry, emitter current and bias allow this circuit to achieve the following performance. Mixer input usable sensitivity: 15 dB Mixer input IMQS*: 90.5 dB
Note: * Mixer input IMQS is defined as follows:
fr = 98.8 MHz, no input fu1 = 98.8 MHz, 1 kHz, 30% modulation fu2 = 99.6 MHz, no modulation
Figure 4 Mixer Circuit (Improved by 6.0 dB over previous products.)
IMQS is the interference 1 and 2 input levels such that when an interference signal with the same level is input to the mixer and distortion occurs at the mixer, the generated IM output has a S/N ratio of 30 dB.
5. IF Amplifier This IF amplifier is a single stage differential amplifier. Specifications Input impedance: 330 Output impedance: 330 Gain: 25 dB Gain adjustment can be provided using either of the methods shown.
IF Gain adj
Temperature Characteristics The LA1193M/V uses Vref temperature characteristics correction to hold the gain temperature characteristics to the low level of about 1 dB over the range -30 to +80C.
No. 4715-11/21
LA1193M, 1193V 6. AGC Circuit The LA1193M/V uses pin diode antenna damping (pin 9) and MOSFET second gate voltage control (pin 16) for AGC. The AGC operating sequence is as follows: Antenna damping (pin diode) MOSFET second gate voltage control (attenuation) 20 dB (attenuation) dB The above AGC sequence is used for the following reasons. * Intermodulation distortion can occur if a signal of 110 dB or larger is input to the antenna circuit varactor diode. In such situations, if the AGC sequence was MOSFET second gate voltage control followed by pin diode antenna damping, as long as the receiver was not in a strong field where the 60 dB or higher AGC attenuation operates, input limitation due to the antenna circuit varactor diode would operate. Therefore, we feel that the AGC operating sequence employed is appropriate. * Consider the problem of AGC loop stability. If the two AGC loops (the antenna damping AGC loop and the MOSFET second gate control AGC loop) operate, the AGC system would become unstable and have an excessively large influence on the transient response. Therefore the following structure cannot be used. MOSFET second gate control antenna damping MOSFET second gate control The AGC operating conditions are the same as those for the LA1175M. * Narrow AGC circuit Since the LA1193M/V's N-AGC (which detects the mixer output) is set to have a high sensitivity, care is required to avoid incorrect operation. In particular, there must be adequate separation from the local oscillator block on the printed circuit board pattern. Also, a resistor of at least 500 must be inserted at the pin 13 input. A low-pass filter is formed by the insertion of this resistor. This low-pass filter prevents incorrect AGC operation due to the local oscillator. * The AGC sensitivity setting can be changed by adjusting the value of the capacitor connected at pin 13. Although the AGC sensitivity can be lowered by increasing the value of the series resistor, caution is required since the AGC has its own frequency characteristics.
* Wide AGC circuit The wide AGC sensitivity is set by the value of the capacitor on pin 8. However, since incorrect operation due to the local oscillator signal may occur if this capacitor is too large, its value must be chosen carefully. * 3D-AGC If the difference in sensitivity between the N-AGC and the W-AGC systems is too large during 3D-AGC operation, the S/N ratio can be degraded in the vicinity of the input where the AGC switches. Therefore, the 3D-AGC setting values must be selected carefully. Although this problem can be ameliorated by applying a time constant to pin 20, in principle, this S/N ratio degradation should be prevented by limiting the sensitivity difference between the two AGC systems.
No. 4715-12/21
LA1193M
Pd max - Ta [LA1193M]
Allowable power dissipation, Pdmax - mW Allowable power dissipation, Pdmax - mW
Pd max - Ta [LA1193M]
Ambient temperature, Ta - C
Ambient temperature, Ta - C
I/O characteristics
S-meter voltage, VSM - V Total harmonic distortion, THD - %
I/O characteristics
AGC output voltage, VAGC - V S-meter voltage, VSM - V Total harmonic distortion, THD - % Antenna input level - dB
Antenna input level - dB
Two-signal interference characteristics
AF out, noise out, AM out -dBm
Noise, AF out - dBm
Two-signal interference characteristics
Desired station input level - dB
Interfering station input level - dB
Desired station input level - dB
Interfering station input level - dB
No. 4715-13/21
LA1193M, 1193V
Three-signal interference characteristics Three-signal interference characteristics
Desired station input level - dB
Interfering station input level - dB
Desired station input level - dB
Interfering station input level - dB
Two-signal interference characteristics
Noise, AF out - dBm
Interference antenna input - dB
VO AGC, antenna dump, FET source - VIN ANT
Antenna damping voltage (pin 9), FET source - V
Pin 16 AGC output voltage - V
Unit (Resistance: , Capacitance: F)
Antenna input - dB
VO AGC, IANT-D - VIN MIX
Antenna damping current - mA
AGC output voltage, VAGC - V
Unit (Resistance: , Capacitance: F)
Mixer input - dB No. 4715-14/21
LA1193M, 1193V
VO AGC, IANT-D - VIN MIX
Antenna damping current - mA
AGC output voltage,VAGC - V
Unit (Resistance: , Capacitance: F)
Mixer input - dB
VO AGC, IANT-D - VIN AGC
VO AGC, IANT-D - VIN AGC
Pin 16 AGC output voltage, - V
Antenna damping current - mA
Pin 13 AGC input - dB (the input value at point A)
Pin 8 AGC input - dB (the input value at point A)
Mixer input - f
Unit (Resistance: , Capacitance: F)
f - MHz
AGC frequency response
AGC input level - dB (Pin 16 VAGC: 2 V) AGC input level - dB (Pin 16 VAGC: 2 V)
AGC frequency response
AGC input frequency - MHz
AGC input frequency - MHz No. 4715-15/21
Antenna damping current - mA
Pin 16 AGC output voltage - V
LA1193M, 1193V
VAGC - VCL20
AGC input ON level - dB (AGC - ON = VAGC < 2 V, pin 13 input) N-AGC ON level (V16 < 2 V) (N-AGC pin 13 input)
VAGC20 - VCL20
Pin 20 voltage, VCL20 - V
Pin 20 voltage, VCL - V
AGC ON level- Ta
AGC ON level - Ta
Pin 20 voltage, VCL - V
Ambient temperature, Ta - C
AGC ON level - dB
Ambient temperature, Ta - C
AGC ON level - Ta
AGC ON level - dB (when pin 16 2 V)
Unit (Resistance: , Capacitance: F)
Ambient temperature, Ta - C
VAGC - f
VAGC-ON level - dB (when pin 16 > 2 V)
AGC input frequency - MHz No. 4715-16/21
LA1193M, 1193V
VAGC OUT - VCL
Pin 16 AGC output voltage - V
Unit (Resistance: , Capacitance: F)
Pin 20 voltage, VCL - V
IANT-D - VCL
Antenna damping current - mA
Pin 20 voltage, VCL - V
VO MIX - VIN MIX
Mixer output - dB
Unit (Resistance: , Capacitance: F)
Mixer input - dB
VOIF - VIN IF
IF output - dB
Unit (Resistance: , Capacitance: F)
IF input voltage - dB No. 4715-17/21
LA1193M, 1193V
VO IF - Ta
Pin 18 IF output - dB
Unit (Resistance: , Capacitance: F)
IF input voltage - dB
IF AMP - f
Pin 18 IF output - dB
Unit (Resistance: , Capacitance: F)
IF input frequency - MHz
VOSC - Ta
Oscillator buffer output voltage - dB
Unit (Resistance: , Capacitance: F)
Ambient temperature, Ta - C
fOSC - Ta
Pin 1 oscillator buffer output, fOSC - MHz
Unit (Resistance: , Capacitance: F)
Ambient temperature, Ta - C No. 4715-18/21
LA1193M, 1193V
VOIF - Ta
IF output level - dB
Unit (Resistance: , Capacitance: F)
Ambient temperature, Ta - C
VIN IF - Ta
IF input level - dB
Unit (Resistance: , Capacitance: F)
Ambient temperature, Ta - C
VO IF - Ta
IF output level - dB
Unit (Resistance: , Capacitance: F)
Ambient temperature, Ta - C
MIX - Ta
Mixer input level - dB
Unit (Resistance: , Capacitance: F)
Ambient temperature, Ta - C No. 4715-19/21
LA1193M, 1193V
IANT-D - Ta
Antenna damping current - mA
Ambient temperature, Ta - C
VO MIX - Ta
VO MIX - dB
Unit (Resistance: , Capacitance: F)
Ambient temperature, Ta - C
VIN MIX - Ta
VIN MIX - dB
Unit (Resistance: , Capacitance: F)
Ambient temperature, Ta - C
VIN MIX - Ta
VIN MIX - dB
Unit (Resistance: , Capacitance: F)
Ambient temperature, Ta - C No. 4715-20/21
LA1193M, 1193V
VOSC - RL
Oscillator buffer output - dB
Unit (Resistance: , Capacitance: F)
Load resistance, RL -
VOSC - VCC
Oscillator buffer output level - dB
Unit (Resistance: , Capacitance: F)
Supply voltage, VCC - V
fOSC - VCC
fOSC - kHz
Unit (Resistance: , Capacitance: F)
Supply voltage, VCC - V
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of March, 1997. Specifications and information herein are subject to change without notice. No. 4715-21/21

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