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Ordering number : EN5709
Monolithic Linear IC
LA70001, 70001M
Record/Playback Amplifiers for VHS Format VCRs
Overview
The LA70001 and LA70001M ICs provide record and playback amplifiers for VHS format VCRs. A system with an adjustment-free Y/C record current can be achieved by combining the LA70001/M with an LA71000M or LA71500M video signal processing IC.
Package Dimensions
unit: mm 3067-DIP24S
[LA70001]
Features
* Direct connection of the head to the playback amplifier input allows the number of external devices to be reduced. * A fixed-current drive technique that is strongly resistant to load fluctuations is adopted in the record amplifier for stable recording characteristics. The record amplifier includes a built-in AGC circuit. * These products have the same package dimensions as the LA70011 and LA70011M to allow a common PCB to be used. These products can also share the same PCB with the LA70020 by mounting the IC at the right end of the LA70020 socket.
SANYO: DIP24S
unit: mm 3112-MFP24S
[LA70001M]
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Symbol VCC max Ta 65C [LA70001] Allowable power dissipation Operating temperature Storage temperature Pd max Topr Tstg Ta 65C [LA70001M] (Using a 114.3 x 76.1 x 1.6 mm glass epoxy PCB) Conditions
SANYO: MFP24S
Ratings 7.0 600 500 -10 to +65 -40 to +150 Unit V mW mW C C
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCC op Conditions Ratings 5.0 4.8 to 5.5 Unit V V
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TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
13098RM (OT) No. 5709-1/8
LA70001, 70001M Electrical Characteristics at Ta = 25C
Parameter [Playback Mode] Current drain Voltage gain Voltage gain difference 1 CH1 CH2 CH1 CH2 CH1 CH2 CH1 CH2 ICCP GVP1 GVP2 GVP1 VNIN1 VNIN2 Vfp1 Vfp2 VHDP1 VHDP2 GVP1--GVP2 With the same conditions as for the voltage gain, the ratio of the output passed through a 1.1-MHz low-pass filter and the output with no input signal. The ratio of the output for VIN = 38 mVp-p, f = 7 MHz and GVP1, 2, 3, and 4. With VIN = 38 mVp-p, f = 4 MHz, the ratio of the 8-MHz output component (second harmonic) and the 4-MHz component (the fundamental). At f = 1 MHz, the output level when the ratio of the 3-MHz output (third harmonic) and the 1-MHz output (fundamental) is -30 dB. The ratio of the VIN = 38 mVp-p, f = 4 MHz output and GVP1. CH1 - CH2 The T6 DC level when there is no input signal. With a f = 4 MHz input, the T6 DC level when the T7A output level becomes 175 mVp-p. With a f = 4 MHz input, the T6 DC level when the T7A output level becomes 400 mVp-p. With a f = 4 MHz input, the T6 DC level when the T7A output level becomes 125 mVp-p. With a f = 4 MHz input, the T6 DC level when the T7A output level becomes 300 mVp-p. Measure the difference in the DC levels with a 1-mA and a 2-mA inflow current. Lch Hch *1 Hch Lch The pin 13 inflow current. The output level when VIN = 400 mVp-p, f = 4 MHz. At f = 4 MHz, when VIN = 700 mVp-p: the output level /VRSP, EP At f = 4 MHz, when VIN = 100 mVp-p: the output level /VRSP, EP At VIN = 400 mVp-p, the ratio of the outputs when f is 1 MHz and 7 MHz, i.e. the ratio of the 7-MHz value to the 1-MHz value.*2. With VIN = 400 mVp-p, f = 4 MHz, the ratio of the 8-MHz output component (second harmonic) and the 4-MHz component (the fundamental). At f = 4 MHz, the output level at which the second harmonic goes to -35 dB. *3 When VIN = 400 mVp-p and f = 4 MHz, the output level/VRSP, EP T9A: VIN = 400 mVp-p, f = 4 MHz T10A: VIN = 2.4 Vp-p, f = 629 kHz The ratio of the (4 MHz 629 kHz) and the 4-MHz outputs. MUTE OFF MUTE ON *1 MUTE ON MUTE OFF PB REC *1 REC PB 1.2 3.2 1.2 0.0 20 -1.0 1.2 0.0 -100 0 2.0 3.5 2.0 4.0 1.0 -2.5 0 dB The pin 13 inflow current. VIN = 38 m Vp-p, f = 1 MHz 23 56 56 -1 29 59 59 0 35 62 62 +1 mA dB dB dB Symbol Conditions Ratings min typ max Unit
Equivalent input noise voltage
1.0
1.5
Vrms
Frequency characteristics
Second harmonic distortion
-40
-35
dB
Maximum output level
CH1 CH2
VOMP1 VOMP2 VCR1 VODC1 VENV VENVSP1
1.2
Vp-p
Crosstalk SP Output DC offset Envelope detector output pin voltage
-40 0 0.8 2.5 4.0 2.5 4.5 4
-35 +100 1.3 3.0 4.5 3.0 5.0 6 5.0 0.8
dB mV V V V V V V V
Envelope detector output pin voltage SP1 VENVSP2 VENVEP1 Envelope detector output pin voltage EP VENVEP2 Switch transistor on resistance in playback mode SW30 threshold level [Record Mode] Current drain Record AGC amplifier output level Record AGC amplifier control characteristics ICCR VRSP VAGC1-SP VAGC2-SP VFRS RPON18 SW30-1 SW30-2
43 105
50 112 0.5 -0.5
57 119 1.0
mA mVp-p dB dB
Record AGC amplifier frequency characteristics
-1
0
+1
dB
Record AGC amplifier second harmonic distortion
VHDRS
-45
-40
dB
Record AGC amplifier maximum output level Record AGC amplifier muting attenuation Record AGC amplifier cross modulation relative level Record muting threshold level
VMOSP VMRS VCYS MUTE-1 MUTE-2
22 -45 -40
mAp-p dB
-45
-40 2.8 5.0 5.0 0.8
dB V V V V
Record mode to playback mode threshold level
PB-REC REC-PB
Notes:Use a resistor with an accuracy of 1.0% for the resistor between pins 13 and 14. *1. This is the voltage application point *2. Here, fix the AGC amplifier gain by applying a 1.8-V DC level to the AGC detector filter pin (pin 15). *3. Here, adjust the output level by applying a DC voltage to the REC-CUR-Adj pin (pin 12).
No. 5709-2/8
LA70001, 70001M Pin Functions
Pin No. 1 2 Pin name N.C N.C Standard DC voltage (V) Equivalent circuit Notes
EP 3 HA (EP/SP) SP 1.5 V
Hch 4 SW30 Lch 1.0 V
SYNC H 5 H-SYNC L 1.5 V
PB
Provided in a separate document.
6
ENVDET-OUT
REC
0
PB
1.7
7
PB-OUT
REC
2.1
8 20
GND
Continued on next page.
No. 5709-3/8
LA70001, 70001M
Continued from preceding page.
Pin No. Pin name Standard DC voltage (V) Equivalent circuit Notes
PB
4.0
9
REC-Y-IN
REC
3.7
PB
4.0
10
REC-C-IN
REC
3.7
REC 3.0 V 11 REC/MUTE/PB REC MUTE 1.0 V PB
PB
2.5 V
12
REC-CURRENT-ADJ2
REC
2.5 V
13
VCC
PB
5.0
14
REC-CURRENT-ADJ1
REC
4.5
Continued on next page.
No. 5709-4/8
LA70001, 70001M
Continued from preceding page.
Pin No. Pin name Standard DC voltage (V) Equivalent circuit Notes
PB
0
15
REC-AGC-FILT
REC
1.6
PB
2.1
16 19
L IN H IN
REC
4.1
PB
2.1 V
17
REC_SP_OUT
REC
4.1 V
PB
0
18
PB FILT
REC
2.5
21 22 23 24
N.C
No. 5709-5/8
LA70001, 70001M Usage Notes Control Pin Logic * HA-SW (EP/SP mode switching): pin 3
GND < the pin 3 DC level < 1.5 V: SP mode 1.5 V < the pin 3 DC level < 5 V: EP mode
* H.SYNC input: pin 5
The pin 5 DC level > 1.5 V: The horizontal synchronization period
In record mode: Used as the REC-AGC-AMP synchronization block gate pulse. * REC/REC-MUTE/PB switching: pin 11
GND < the pin 11 DC level < 1.0 V: Playback mode 1.0 V < the pin 11 DC level < 3.0 V: Record mode with recording muted. 3.0 V < the pin 11 DC level < 5.0 V: Record mode
Envelope detection characteristics: pin 6 The LA70001 provides a built-in playback signal envelope detection circuit so that the tracking adjustment can be made automatic.
Envelope Detection Voltage Characteristics The pin 6 detected DC level (V) EP when an 18 k resistor is connected at pin 6.
SP when an 18 k resistor is connected at pin 6.
The pin 7 playback output level (mVp-p)
No. 5709-6/8
LA70001, 70001M Record Amplifier Gain Control The LA70001 achieves an adjustment-free record current by adding an AGC circuit in the record amplifier block. The record current can be modified using the following method.
* Record current adjustment 2: When left open. Pin 12 DC level is set to 1/2 VCC (approximately 2.5 V) by an internal bias, and the record current is determined by Ro1. Design value: When Ro1 is 1.5 k, the record current will be 12.7 mA per channel. * Record current adjustment 2: When used. The gain can be varied by -6.0 dB to +3.5 dB relative to the value set by Ro1 by applying a control DC voltage of between 1 and 4 V to pin 12.
Record current (mAp-p) design value
Note: The technique shown in the figure below can be used to apply a DC level to pin 12. This allows a control voltage of between 1 and 4 V to be applied.
No. 5709-7/8
LA70001, 70001M Block Diagram
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 January, 1998. Specifications and information herein are subject to change without notice. PS No. 5709-8/8

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