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Ordering number: EN 2620C

Monolithic Linear IC

Ordering number: EN 2620C
Monolithic Linear IC
LA3242 Preamplifier for Compact Cassette Recorder Recording-only Use
Overview
The LA3242 is a preamp IC for compact cassette recorder recording-only use. The distinctive feature of the LA3242 is that it contains mechanical switches which have been so far connected externally as peripheral parts.
Package Dimensions
unit : mm
3067-DIP24S
LA3242
Features
. On-chip electronic select switches permitting selection of . . . . .
SANYO : DIP24S
Functions
. Recording preamplifier . Microphone amplifier . ALC output . Electronic switch
Specifications
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Conditions Ratings 16 720 -20 to +75 -40 to +125 Unit V mW °C °C
Parameter Recommended supply voltage Operating voltage range Symbol VCC VCC op Conditions Ratings 6 4.5 to 14.0 Unit V V
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D3097HA(II) / N257TA / 7027TA, TS No.2620-1 / 12
LA3242
ALCW ALCB ALCTHD ALCVO CT4 CT5 ALCon ALCoff RON RF1
Allowable power dissipation, Pd max - mW
Ambient temperature, Ta - °C
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LA3242
Equivalent Circuit Block Diagram
Top view
Equivalent Circuit
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LA3242
Sample Application Circuit
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LA3242
Test Circuit
Sample Printed Circuit Pattern (Cu-foiled area)
LA3242
IC usage Notes (1) The base of a PNP transistor is connected to input pins 2 and 23.
For the relation between supply voltage VCC and VINDC, refer to the VCC - VINDC characteristic. (2) Output waveform starting time (Refer to Data ts - Cr.) Rise waveform at pin 7 or 18
Electronic SW ON signal
Control pin . 4 µAmin
Electronic SW OFF
Electronic SW ON
Threshold region (. 1 V)
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LA3242
(5) ALC control pin and ON / OFF level
Threshold region
REC amplifier output VOAC is controlled by the ALC CONT voltage and the threshold region has a range of approximately 0.5 V. The ALC CONT voltage is set to 1.0 V or less / 1.5 V or greater to turn ON / OFF the ALC, respectively. (Refer to Data VOAC, V8, I1 - VALC
CONT.)
VGO, VG - fIN Voltage gain (Open), VGO - dB Voltage gain (Closed), VG - dB Voltage gain (Open), VGO - dB Voltage gain (Closed), VG - dB
VGO, VG - fIN
Either Me / Nor or Nor / High On
Input frequency, fIN - Hz Quiescent current, ICCO - mA Quiescent current, ICCS (Electronic SW ON) - mA ICCO, ICCS - VCC
Input frequency, fIN - Hz VG - VCC
Voltage gain, VG - dB
Supply voltage, VCC - V
Supply voltage, VCC - V No.2620-7 / 12
Maximum output voltage, VO max - V
VO, THD - VIN
Input voltage, VIN - dBm VO, THD - VIN Input voltage, VIN - dBm VO max - VCC Supply voltage, VCC - V VO, THD - VIN
Pin 17
LA3242
ALC output voltage, VOALC - dB
Crosstalk, CT - dB
Input voltage, VIN - dBm VOALC - VCC
Supply voltage, VCC - V
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LA3242
Equivalent input noise voltage, VNI - µV VNI - VCC
VNO - VCC Output noise voltage, VNO - µV
Maximum output voltage, VO max - V
Input signal source resistance, Rg - VO max - RL Maximum output voltage, VO max - V
Equivalent input noise voltage, VNI - µV
Supply voltage, VCC - V VNO - Rg Output noise voltage, VNO - µV
Supply voltage, VCC - V VNI - Rg
Input signal source resistance, Rg - VO max - VCC
Supply voltage, VCC - V VG - VCC
Voltage gain, VG - dB
Input voltage, VIN - dBm
Supply voltage, VCC - V No.2620-9 / 12
LA3242
Equivalent input noise voltage, VNI - µV VNO - VCC Output noise voltage, VNO - µV VNI - VCC
Equivalent input noise voltage, VNI - µV
Supply voltage, VCC - V VNI - Rg
Supply voltage, VCC - V CT - fIN
Input signal source resistance, Rg - CT - fIN
Crosstalk, CT - dB
Input frequency, fIN - Hz CT - fIN
Crosstalk, CT - dB
Input frequency, fIN - Hz CT - fIN
Crosstalk, CT - dB
Input frequency, fIN - Hz
Crosstalk, CT - dB
Input frequency, fIN - Hz No.2620-10 / 12
LA3242
Rr - VCC Ripple rejection ratio, Rr - dB Ripple rejection ratio, Rr - dB Rr - fR
Supply voltage, VCC - V Rr - Cr Ripple rejection ratio, Rr - dB Quiescent current, ICCO - mA
Ripple frequency, fR - Hz ICCO - Ta
From the top:
Ambient temperature, Ta - °C VO max - Ta Maximum output voltage, VO max - V Maximum output voltage, VO max - V
Maximum output voltage, VO max - V
Value of capacitor for ripple filter, Cr - µF VG - Ta
Ambient temperature, Ta - °C VO max - Ta
Voltage gain, VG - dB
Ambient temperature, Ta - °C VO max - Ta
Ambient temperature, Ta - °C
Ambient temperature, Ta - °C No.2620-11 / 12
LA3242
VDAC, V17 - Ta Control voltage (Pin 9), VCONT - V VCONT - VCC
Control voltage VCONT on pin 9 and pin 9-controlled electronic SW ON / OFF characteristic
DC voltage, VDAC, V17 - V
Electronic SW OFF (Break) Electronic SW ON (Make)
Thrshold region Supply voltage, VCC - V VOAC, V8, I - VALC CONT
Ambient temperature, Ta - °C VCONT - VCC Control voltage(pin 16), VCONT - V Output voltage, VOAC - V Residual voltage(Pin 8), V8 - V
Control voltage VCONT on pin 16 and pin 16-controlled electronic SW ON / OFF characteristic
Electronic SW OFF
Electronic SW ON
Threshold region Supply voltage, VCC - V ts - Cr - mV ALC control voltage, VALC VIN DC - VCC
Starting time, ts - s
Input DC voltage, VIN
Value of capacitor for ripple filter (Pin 14), Cr - µF
Supply voltage, VCC - V
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. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 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: 2 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. 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 December, 1997. Specifications and information herein are subject to change without notice. No.2620-12 / 12
Bias current, I - µA