Monolithic Linear LA3242 Preamplifier Compact Cassette Recorder R

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Monolithic Linear LA3242 Preamplifier Compact Cassette Recorder R

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Ordering number: 2620C
Monolithic Linear
LA3242 Preamplifier Compact Cassette Recorder Recording-only
LA3242 preamp compact cassette recorder recording-only use. distinctive feature LA3242 that contains mechanical switches which have been connected externally peripheral parts.
Package Dimensions
unit
3067-DIP24S
[LA3242]
Features
On-chip electronic select switches permitting selection
normal/higher speed recording metal(chrome)/normal tape recording mode using dedicated control pins. output pins making easy make Dolby recording system. control voltage from microcomputer, etc. used turn ON/OFF control voltage initial value. On-chip microphone amplifier making easy provide microphone mixing. Wide operating voltage range (VCC 14.0 used conjunction with playback-only preamp LA3246 make double-cassette dubbing system.
SANYO DIP24S
Functions
Recording preamplifier Microphone amplifier output Electronic switch
Specifications
Maximum Ratings 25°C
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol Topr Tstg Conditions Ratings +125 Unit
Operating Conditions 25°C
Parameter Recommended supply voltage Operating voltage range Symbol Conditions Ratings 14.0 Unit
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, JAPAN
D3097HA(II)/N257TA/7027TA,TS No.2620-1/12
LA3242
Operating Characteristics 25°C, kHz, 0.775
Parameter Quiescent current Quiescent current [REC Amp] Voltage gain (Open) Voltage gain (Closed) Total harmonic distortion Maximum output voltage Equivalent input noise voltage Input resistance Crosstalk Channel balance [Microphone Amp] Voltage gain (Open) Voltage gain (Closed) Total harmonic distortion Maximum output voltage Equivalent input noise voltage Input resistance Crosstalk [ALC] range balance distortion output voltage Crosstalk Crosstalk ON-state voltage OFF-state voltage [Switch] ON-state resistance feedback resistance Symbol ICCO ICCS VGO1 VNI1 VGO2 THD2 VNI2 Conditions Me/Nor, Nor/High Me/Nor, Nor/High 42.5 44.5 0.05 Unit
B.P.F
46.0
Between amps ampMicrophone
B.P.F
Microphone ampREC Input range when output distortion becomes after begins applied. Output difference between Between amps ampMicrophone Voltage Voltage
ALCW ALCB ALCTHD ALCVO ALCon ALCoff
0.15 0.42 0.53
0.33
Allowable power dissipation,
Ambient temperature,
No.2620-2/12
LA3242
Equivalent Circuit Block Diagram
view
Equivalent Circuit
No.2620-3/12
LA3242
Sample Application Circuit
Note: electronic select switching level approximately (VCC 0.9)/2. amplifier parameters through should selected accommodate recording level frequency response that will required metal/normal tape normal/higher speed modes. through configured with coil ``L'', capacitor ``C'', resistor ``R''. When electronic control pins level, each electronic switch turned When ON/OFF control less/1.5 greater, turned ON/OFF, respectively 25°C). width depends external resistor
No.2620-4/12
LA3242
Test Circuit
Sample Printed Circuit Pattern (Cu-foiled area)
Unit (resistance: capacitance: No.2620-5/12
LA3242
usage Notes base transistor connected input pins
When voltage applied input pins externally, connect capacitor input pins. recommended value capacitor voltage VINDC with input pins open (VINDC typ).
relation between supply voltage VINDC, refer VINDC characteristic. Output waveform starting time (Refer Data Cr.) Rise waveform
When supply voltage switched amplifier output (pins will rise. Output waveform time varied capacitor connected minimum value value made less than more noise will occur ripple rejection will worsen time supply voltage switched Electronic switch control circuit control circuit control pins configured shown left.
Electronic signal
Control µAmin
Control level VCONT control circuit given VCONT (VCC 0.9)
Relation between control voltage turn ON/OFF electronic switch supply voltage (Refer Data VCONT VCC.) control level electronic switch CONT fixed supply voltage VCC. threshold region range approximately middle point threshold region given value supply voltage represented approximately (VCC 0.9) electronic switch turned ON/OFF applying voltage middle point voltage ±0.5 more/less, respectively, electronic switch CONT pins
Electronic
Electronic
Threshold region
No.2620-6/12
LA3242
control ON/OFF level
ON/OFF control circuit configured shown left. When voltage (VBE1+VBE2) greater applied CONT17, potential (pin drops level. turned (ALC function release).
Threshold region
amplifier output VOAC controlled CONT voltage threshold region range approximately CONT voltage less/1.5 greater turn ON/OFF ALC, respectively. (Refer Data VOAC, VALC
CONT.)
VGO, Voltage gain (Open), Voltage gain (Closed), Voltage gain (Open), Voltage gain (Closed),
VGO,
Either Me/Nor Nor/High
Input frequency, Quiescent current, ICCO Quiescent current, ICCS (Electronic ICCO, ICCS
Input frequency,
Voltage gain,
Supply voltage,
Supply voltage, No.2620-7/12
Output voltage, Total harmonic distortion,
Output voltage, Total harmonic distortion,
Maximum output voltage,
Output voltage, Total harmonic distortion,
Input voltage, Input voltage, Supply voltage,
Input voltage, Output voltage, Total harmonic distortion, Output voltage, Total harmonic distortion, Supply voltage, Input voltage,
LA3242
output voltage, VOALC
Crosstalk,
Input voltage, VOALC
Supply voltage,
No.2620-8/12
LA3242
Equivalent input noise voltage,
(VCC
Output noise voltage,
Maximum output voltage,
Input signal source resistance, Maximum output voltage,
Equivalent input noise voltage,
Supply voltage, Output noise voltage,
Supply voltage,
Input signal source resistance,
Load resistance, Output voltage, Total harmonic distortion,
Supply voltage,
Voltage gain,
Input voltage,
Supply voltage, No.2620-9/12
LA3242
Equivalent input noise voltage, Output noise voltage,
Equivalent input noise voltage,
Supply voltage,
Supply voltage,
Input signal source resistance,
Crosstalk,
Input frequency,
Crosstalk,
Crosstalk,
Input frequency,
Input frequency,
Crosstalk,
Input frequency,
Crosstalk,
Input frequency, No.2620-10/12
LA3242
Ripple rejection ratio, Ripple rejection ratio,
Supply voltage, Ripple rejection ratio, Quiescent current, ICCO
Ripple frequency, ICCO
From top:
Ambient temperature, Maximum output voltage, Maximum output voltage,
Maximum output voltage,
Value capacitor ripple filter,
Ambient temperature,
Voltage gain,
Ambient temperature,
Ambient temperature,
Ambient temperature, No.2620-11/12
LA3242
VDAC, Control voltage (Pin VCONT VCONT
Control voltage VCONT 9-controlled electronic ON/OFF characteristic
voltage, VDAC,
Electronic (Break) Electronic (Make)
Thrshold region Supply voltage, VOAC, VALC CONT
Ambient temperature, VCONT Control voltage(pin 16), VCONT Output voltage, VOAC Residual voltage(Pin
Control voltage VCONT 16-controlled electronic ON/OFF characteristic
Electronic
Electronic
Threshold region Supply voltage, control voltage, VALC
CONT
Starting time,
Input voltage,
Value capacitor ripple filter (Pin 14),
Supply voltage,
products described contained herein intended surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment like, failure which directly indirectly cause injury, death property loss. Anyone purchasing products described contained herein above-mentioned shall: Accept full responsibility indemnify defend SANYO ELECTRIC CO., LTD., affiliates, subsidiaries distributors their officers employees, jointly severally, against claims litigation damages, cost expenses associated with such use: impose responsibility fault negligence which cited such claim litigation SANYO ELECTRIC CO., LTD., affiliates, subsidiaries distributors their officers employees jointly severally. Information (including circuit diagrams circuit parameters) herein example only; guaranteed volume production. SANYO believes information herein accurate reliable, guarantees made implied regarding infringements intellectual property rights other rights third parties. This catalog provides information December, 1997. Specifications information herein subject change without notice. No.2620-12/12
Bias current,

Monolithic Linear LA3242 Preamplifier Compact Cassette Recorder R

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