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Monolithic Linear IC
No. 5647
LA7415
VHS VCR Playback Head and Record Amplifiers
Overview
The LA7415 is a record and playback amplifier IC for VHS format VCR decks. In combination with a Sanyo LC7420 or LA7430 Series video signal processing IC, the LA7415 can provide an adjustment-free Y/C record current.
Package Dimension
unit: mm 3061-DIP30S
[LA7415]
Features
* Record amplifier: Provides stable recording characteristics using a fixed-current drive technique that is resistant to load variations. * REC-AMP: Includes a built-in AGC circuit. * Can use the same printed circuit board as the LA7411.
SANYO: DIP30S
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Ta 65 C Conditions Ratings 7.0 650 -10 to +65 -40 to +150 Unit V W C C
Operating Conditions at Ta = 25C
Parameter Supply voltage Operating voltage range Symbol VCC VCCop Conditions Ratings 5.0 4.8 to 5.5 Unit V V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
43097HA(OA) No. 5647-1/12
LA7415 Electrical Characteristics at Ta = 25C
Ratings Parameter Symbol Input Output [Playback Mode] Current drain SP L Voltage gain CH1 ICCP VGP1 VGP2 VGP3 VGP4 VGP1 VGP2 VGP EP-SP VNIN1 VNIN2 VNIN3 VNIN4 Vfp1 Vfp2 Vfp3 Vfp4 VHDP1 VHDP2 VHDP3 VHDP4 VOMP1 VOMP2 VOMP3 VOMP4 VCR1 T20A T10A T23A T10A T27A T10A T30A T10A - - - - - - VGP1 - VGP2 VGP3 - VGP4 VGP3 - VGP1 After the 1.1-MHz LPF VOUT VGP1, 2, 3, 4 VIN = 38 mVp-p, f = 1 MHz SP H CH2 EP L CH3 T15: 5.0 V, T13: OPEN, T7: OPEN Pin 15 influx current Conditions T2 TRCK OPEN OPEN OPEN OPEN OPEN - - - OPEN OPEN OPEN OPEN VIN = 38 mVp-p f = 7 MHz VOUT VGP1, 2, 3, 4 output ratio OPEN OPEN OPEN OPEN T4 HA 0 0 0 5.0 5.0 - - - 0 0 5.0 5.0 0 0 5.0 5.0 0 0 5.0 5.0 0 0 5.0 5.0 0 0 0 0 0 0 5.0 5.0 5.0 5.0 5.0 5.0 - 0 - 5.0 0 5.0 0 5.0 0 5.0 0 5.0 T5 SW30 MUTE 0 0 2.5 0 2.5 - - - 0 2.5 0 2.5 0 2.5 0 2.5 0 2.5 0 2.5 0 2.5 0 2.5 0 0 0 2.5 2.5 2.5 0 0 0 2.5 2.5 2.5 0 2.5 0 2.5 - 0 - 2.5 0 2.5 2.5 0 24 54.0 54.0 56.0 56.0 -1 -1 1 - - - - -2.5 -2.5 -2.5 -2.5 - - - - 1.0 1.0 1.0 1.0 - - - - - - - - - - - - -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 30 57.0 57.0 59.0 59.0 0 0 2 1.1 1.1 1.1 1.1 0 0 0 0 -40 -40 -40 -40 1.2 1.2 1.2 1.2 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 0 0 0 0 0 0 0 0 0 0 0 0 36 60.0 60.0 62.0 62.0 +1 +1 3 mA dB dB dB dB dB dB dB min typ max Unit
EP H CH4 Voltage gain differential 1 Voltage gain differential 2 Inter-mode gain difference CH1 Equivalent input noise voltage CH2 CH3 CH4 CH1 Frequency characteristics CH2 CH3 CH4 CH1 Second harmonic distortion CH2 CH3 CH4 CH1 Maximum output level CH2 CH3 CH4
T20A T10A T23A T10A T27A T10A T30A T10A T20A T10A T23A T10A T27A T10A T30A T10A T20A T10A T23A T10A T27A T10A T30A T10A T20A T10A T23A T10A T27A T10A T30A T10A T23A T10A
1.5 Vrms 1.5 Vrms 1.5 Vrms 1.5 Vrms - - - - -35 -35 -35 -35 - - - - -35 -35 -35 -35 -35 -35 -35 -35 -35 -35 -35 -35 +100 +100 +100 +100 +100 +100 +100 +100 +100 +100 +100 +100 dB dB dB dB dB dB dB dB Vp-p Vp-p Vp-p Vp-p dB dB dB dB dB dB dB dB dB dB dB dB mV mV mV mV mV mV mV mV mV mV mV mV
OPEN VIN = 38 mVp-p OPEN f = 4 MHz (8-MHz component)/(4-MHz component) OPEN output ratio OPEN f = 1 MHz The output level when the third harmonic in the output is -30 dB OPEN OPEN OPEN OPEN OPEN VIN = 38 mVp-p, f = 4 MHz VOUT VGP1, 2 OPEN OPEN OPEN OPEN OPEN OPEN VI = 38 mVp-p, f = 4 MHz VOUT VGP3, 4 OPEN OPEN OPEN OPEN OPEN CH1-CH2 OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN
CH1 Crosstalk SP (Note 1) CH2
T27A T10A T30A T10A T20A T10A
VCR2
T27A T10A T30A T10A T23A T10A
CH3 Crosstalk EP (Note 1) CH4
VCR3
T27A T10A T30A T10A T20A T10A
VCR4
T27A T10A T30A T10A
VODC1 VODC2 VODC3 VODC4 VODC5 VODC6
-
T10
-
T10
CH3-CH4
Output DC offset
-
T10
CH1-CH3
-
T10
CH2-CH4
-
T10
CH1-CH4
-
T10
CH2-CH3
Continued on the next page. Note 1. With the input inductor L (8.2 H) shorted. 2. Since the T4 (HA) control switch timing is synchronized with T6 (H-Sync), a T6 trigger (0 - 5 V - 0) must be input before measuring each of these items.
No. 5647-2/12
LA7415
Continued from the preceding page. Ratings Parameter Symbol Input Output T15: 5.0 V, T13: OPEN, T7: OPEN Enveloped detector output pin voltage Enveloped detector voltage SP1 Enveloped detector voltage SP2 Enveloped detector voltage EP1 Enveloped detector voltage EP2 Comparator output voltage 1 Comparator output voltage 2 Playback mode on switching transistor on resistance Playback mode mode switching transistor on resistance Trick 1 threshold level Trick 2 threshold level HAPB threshold level SW30 threshold level VENV VENVSP1 T20A VENVSP2 T20A VENVEP1 T27A VENVEP2 T27A VCOMP1 VCOMP2 RPON17 RPON18 RPON21 RPON24 RPON26 RPON29 TR1-1 TR1-2 TR2-1 TR2-2 HAP-1 HAP-2 SW30-1 SW30-2 T20A T8 The T8 DC voltage with no input f = 4 MHz T10A: Adjusted to 300 mV p-p f = 4 MHz T10A: Adjusted to 600 mV p-p f = 4 MHz T10A: Adjusted to 200 mV p-p f = 4 MHz T10A: Adjusted to 450 mV p-p f = 4 MHz, VIN = 38 mVp-p The T3 DC voltage f = 4 MHz, VIN = 38 mVp-p The T3 DC voltage The difference in the DC measurement for 1-mA and 2-mA influx currents Conditions T2 TRCK T4 HA T5 SW30 MUTE 0 0 0.4 0.8 V min typ max Unit
OPEN
0
T8
OPEN
0
0
2.1
2.6
3.1
V
T8
OPEN
0
0
4.5
4.8
5.0
V
T8
OPEN
5.0
0
2.0
2.6
3.0
V
T8
OPEN
5.0
0
4.5
4.8
5.0
V
T3
5.0
0
0
-
0.4
0.7
V
T20A
T3 P-17 P-18 P-21 P-24 P-26 P-29 T2 T2 T2 T2 T4 T4 T5 T4
5.0 - - OPEN
5.0 - - 5.0 5.0 0 0 - - - - * * - - T4 HA 0 0 5.0 - 0 5.0 0 5.0 0 5.0 0 5.0 0 5.0 0 5.0
0 - - - - - - - - - - - - * * T5 SW30 MUTE 0 0 0 - 0 0 0 0 0 0 0 0 0 0 5.0 5.0
4.5 - - - - - - 3.2 1.2 0.0 1.2 1.8 0.0 1.2 0.0
4.8 4.0 4.0 4.0 4.0 4.0 4.0 - - - - - - - -
- 6.0 6.0 6.0 6.0 6.0 6.0 5.0 2.8 0.8 2.8 5.0 1.4 5.0 0.8
V
The difference in the DC measurement for 1-mA and 2-mA influx currents Normal Trick1 Trick1 Normal Normal Trick2 Trick2 Normal SP EP EP SP Lch Hch Hch Lch
OPEN OPEN OPEN * * * * - - - - T2
V V V V V V V V
[Record Mode] Current drain AGC amplifier output level Inter-mode gain difference AGC amplifier control characteristics 1 AGC amplifier control characteristics 2 AGC amplifier frequency characteristics AGC amplifier second harmonic distortion AGC amplifier maximum output level AGC amplifier muting attenuation ICCR VRSP VREP VGR T11A T21A T11A T26A - -
T15: 5.0 V, T2: OPEN, T6: 5.0 V, T7: 5.0 V The pin 15 influx current f = 4 MHz VIN = 200 mVp-p VRSP/VREP f = 4 MHz, VIN = 400 mVp-p The output level/VRSP, EP ratio f = 4 MHz, VIN = 100 mVp-p The output level/VRSP, EP ratio f = 1 MHz, 7 MHz, VIN = 100 mVp-p The 7 MHz/1 MHz output ratio f = 4 MHz, VIN = 200 mVp-p The (8 MHz component)/(4 MHz component) output ratio f = 4 MHz, The output level for which the second harmonic is -35 dB f = 4 MHz, VI = 200 mVp-p The output level/VRSP, EP ratio
REC Adj2 OPEN OPEN OPEN - OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN Adj. Adj. OPEN OPEN
44 147 116 1.30 - - -1.0 -1.0 -1.0 -1.0 - - 20 20 - -
55 156 123 2.05 0.5 0.5 -0.5 -0.5 -0.0 -0.0 -45 -45 22 22 -45 -45
66
mA
165 mVp-p 130 mVp-p 2.80 1.0 1.0 - - +1.0 +1.0 -40 -40 dB dB dB dB dB dB dB dB dB
VAGC1-SP T11A T21A VAGC1-EP T11A T26A VAGC2-SP T11A T21A VAGC2-EP T11A T26A VFRS VFRE VHDRS VHDRE VOMRS VOMRE VMRS VMRE T11A T21A T11A T26A T11A T21A T11A T21A T11A T21A T11A T26A T11A T21A T11A T26A
- mAp-p - mAp-p -40 -40 dB dB
Continued on the next page.
No. 5647-3/12
LA7415
Continued from the preceding page. Ratings Parameter Symbol Input Output [Record Mode] T15: 5.0 V, T2: OPEN, T6: 5.0 V, T7: 5.0 V VCYS VCYE RRON17 Record mode mode switching transistor on resistance RRON18 RRON21 RRON24 RRON26 RRON29 HA record threshold level Record MUTE threshold level Record/playback threshold level HAR-1 HAR-2 MUTE-1 MUTE-2 SW REC/PB T10A T21A T10A: f = 629 kHz, VIN = 360 mVp-p T11A: f = 4 MHz, VIN = 200 mVp-p (4 MHz 629 kHz)/(4 MHz) output ratio Conditions T2 REC Adj2 OPEN T4 HA T5 SW30 MUTE 0 - -45 -40 dB min typ max Unit
AGC amplifier relative cross modulation level
0
T11A T26A P-17 P-18 P-21 P-24 P-26 P-29 T4 T4 T5 T5
OPEN OPEN OPEN
5.0 5.0 0 5.0 5.0 0 0 * * - - -
0 - - - - - - - - * * -
- - - - - - - 1.8 0.0 3.4 0.0 2.2
-45 4.0 4.0 4.0 4.0 4.0 4.0 - - - - -
-40 6.0 6.0 6.0 6.0 6.0 6.0 5.0 1.4 5.0 3.0 5.0
dB V V V V V
The difference in the DC measurement for 1-mA and 2-mA influx currents
OPEN OPEN OPEN OPEN
SP EP EP SP MUTE OFF ON MUTE ON OFF T7: control voltage
- - - - -
Notes 3. Measure with a DC voltage of about 1.8 V applied to the AGC detector filter pin (pin 12) and with the AGC amplifier gain fixed. 4. Adjust the output level by applying a DC voltage to T13 (REC CUR.Adj2) 5. Use a resistor with a 1.0% tolerance between pins 14 and 15.
Usage Notes 1. Control Pin Logic RF SW, REC MUTE: pin 5 Playback mode If the pin 5 DC voltage is < 1.0 V: Lch If the pin 5 DC voltage is > 1.0 V: Hch Record mode If the pin 5 DC voltage is < 3.2 V: Muting will be off If the pin 5 DC voltage is > 3.2 V: Muting will be on
Record/playback mode switching: pin 7
If the pin 7 DC voltage is < 2.0 V: Playback mode If the pin 7 DC voltage is > 2.0 V: Record mode
No. 5647-4/12
LA7415 H.Sync input: pin 6
If the pin 6 DC voltage is > 1.5 V: Currently the signal is in an H.Sync period
*: Playback mode: Used for switching timing in SP search. Record mode: Used as the record amplifier AGC synchronization block gate pulse. (4) Playback trick mode switching: pin 2
If the pin 2 DC voltage is > 3.0 V: Trick 1 If the pin 2 DC voltage is < 1.0 V: Trick 2 If the pin 2 DC voltage is > 1.0 V and < 3.0 V: Normal
*: Normal mode: Two channels controlled (EP/SP) by pin 4: ON Envelope comparator: OFF In trick 1 and 2 modes: All 4 channels: ON Envelope comparator: ON *: The difference between trick 1 and trick 2 is that: Trick1 Envelope comparator (pin 3) output Servo (microcontroller) Pin 4 HA SP search is performed in the [HA switch path. HA switch] Trick2 Envelope comparator output SP search is performed in the [HA switch path. (See the block diagram.) HA switch]
or
HA SW (EP/SP mode switching): pin 4
If the pin 4 DC voltage is < 1.6 V: SP mode If the pin 4 DC voltage is > 1.6 V: EP mode
*: H.Sync synchronization for HA switching: The switching of the HA SW circuit show in the figure at the right is synchronized with the H.Sync signal input to pin 6. (Other EP/SP switching is performed in real time.) Comp.OUT (pin 3) If the EP envelope is > SP: High (4.0 V or higher) If the EP envelope is < SP: Low (0.7 V or lower)
No. 5647-5/12
LA7415 2. Envelope Detector Characteristics: pin 8 The LA6529M includes an on-chip playback signal envelope detector circuit used to achieve automatic tracking adjustment with essentially linear characteristics. Envelope Detector Characteristics (design target values) f = 4 MHz
Pin 8 + external 18 k resistor SP + external 18 k resistor
Pin 10 playback amplifier output level (mVp-p)
3. Record Amplifier Gain Control The LA6529M achieves an adjustment-free record current by adding an AGC circuit in the record amplifier block. The record current can be modified using the circuit shown below. (1) REC Current.Adj2: When open The pin 13 DC level is set to 1/2 VCC (about 2.5 V) by an internal bias and the record current is determined by RO1.
Design values: RO1: 1.5 k = 15.6 mAp-p (SP) (per channel) = 12.3 mAp-p (EP) (2) REC Current.Adj2: When used The value determined by RO1 can be adjusted from -6.0 dB to +3.5 dB by applying a control DC level (1 to 4 V) to pin 13. (Reference) The circuit below can be used to apply the DC control level to pin 13. This allows 9 modes (1 to 4 V) to be applied.
Design values
Microcontroller
No. 5647-6/12
LA7415 Pin Functions
Pin No. Pin Standard DC voltage (V) Pin circuit Notes
PB 1 19 22 28 REC PB Amp Second filter
2.0
3.6
3.0 V 2 TRICK-H 1.0 V
Trick1 NORMAL Trick2
High: 4.5 V or higher PB Low: 0.7 V or lower 3 COMP-OUT EP > SP ENV: High
REC
OPEN
4
HA (EP/SP)
1.6 V
EP SP
SW30 REC MUTE Hch 1.0 (V) Lch ON OFF 3.2 (V)
5
RF-SW (REC-MUTE)
Sync 6 H-SYNC 1.5 V H L
Continued on the next page.
No. 5647-7/12
LA7415
Continued from the preceding page. Pin No. Pin Standard DC voltage (V) Pin circuit Notes
PB
0 REC 2.0 V PB
7
REC-H
REC
5
Described PB in a separate document. 8 ENV DET OUT
REC
0
9
GND
PB-OUT 10 REC-C-IN
PB
2.3
REC
3.6
11
REC-Y-IN
REC
3.6
PB
1.6
12
AGC-FLT
REC
1.6
PB
2.5 4 V: +3.5 dB 2.5 V: 0 dB (OPEN) 1 V: -6 dB
13
REC-CURRENT ADJ2
REC
2.5
Continued on the next page.
No. 5647-8/12
LA7415
Continued from the preceding page. Pin No. Pin Standard DC voltage (V) Pin circuit Notes
PB
4.5
14
REC-CURRENT ADJ1
REC
5.0
15
VCC
PB 16 REC-BIAS REC
2.5
1.7
PB 17 18 REC-SP OUT REC-EP OUT REC
0
4.2
20 23 27 30
SP-L-IN SP-H-IN EP-L-IN EP-H-IN
PB
0.7
REC
0
21 24 26 29
SP-L-SW SP-H-SW EP-L-SW EP-H-SW
PB
0
REC
4.2
25
PRE-GND
No. 5647-9/12
LA7415 Block Diagram
No. 5647-10/12
LA7415 Test Circuit
No. 5647-11/12
LA7415
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 April, 1997. Specifications and information herein are subject to change without notice. No. 5647-12/12

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