UTC TA7668BP LINEAR INTEGRATED CIRCUIT
DUAL PRE-AMPLIFIER FOR TAPE
RECORDER
DESCRIPTION
The UTC TA7668BP is a dual pre-amplifier with ALC and
muting designed for use recorder/playback amplifier of tape
recorder. It is suitable for a stereo set and a radio cassette
recorder.
FEATURES
*Build-in ALC detector circuit
*Build-in muting circuit
*Wide operating voltage range( 6V to 15V)
BLOCK DIAGRAM
Ch1 Pre-Out
and Rec in
5
Ch1 Rec
Output
Mute
Outpu
34 15
Mute
Input
t
DIP-16
Ch1 Pre IN NF
Ch1 Pre IN
Ch2 Pre IN
Ch2 Pre IN NF
ALC
6
PreAMP
7
8
10
11
AMP
Pre
GND
ALC
Pre
DET
129 13 1
Ch2 Pre-Out
and Rec In
Rec
AMP
Rec
AMP
Ch2 Rec
Output
14
Mute
Output
Rec
GND
16
Vcc
Vs
2
ABSOLUTE MAXIMUN RATING(Ta=25°C)
PARAMETER SYMBOL VALUE UNIT
Supply Voltage VCC 16 V
Power Dissipation PD 750 mW
Operating Temperature TOPR -25~75 °C
Storage Temperature TSTG -55~150 °C
Note: De-rated above Ta=25°C in proportion of 6mW/°C.
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R110-008,A
1
UTC TA7668BP LINEAR INTEGRATED CIRCUIT
DC VOLTAGE(VCC=9V,Ta=25°C, no input signal)
PIN NO. SYMBOL VALUE UNIT
1 V1 0 V
2 V2 8.2 V
3 V3 0 V
4 V4 3.3 V
5 V5 1.3 V
6 V6 1.3 V
7 V7 0 V
8 V8 0.9 V
9 V9 0 V
10 V10 0 V
11 V11 1.3 V
12 V12 1.3 V
13 V13 3.3 V
14 V14 0 V
15 V15 2.4 V
16 V16 9 V
ELECTRICAL CHARACTERISTICS(Ta=25°C, Vcc=9V, f=1kHz, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Quiescent Circuit Current ICCQ VIN=0 8.5 10.5 mA
PRE AMPLIFIER
Open Loop Voltage Gain GVO VIN=-80dBm 65 78 dB
Maximum Output Voltage VOM(1) THD=1% 0.5 0.8 Vrms
Total Harmonic Distortion THD(1) VO=0.2Vrms 0.15 0.5 %
Output Noise Voltage VNO Rg=2.2KΩ, B.P.F., NAB,
30Hz~20kHz
Cross Talk C.T. Rg=2.2KΩ 47 60 dB
REC AMPLIFIER
Closed Loop Voltage Gain GV RL=10KΩ 12.7 14.7 16.7 dB
Maximum Output Voltage VOM(2) THD=1% 2 2.5 Vrms
Total Harmonic Distortion THD(2) VO=1.5Vrms 0.2 %
ALC Range RALC VIN=-60dBm,RIN=2.2KΩ 45 dB
Total Harmonic Distortion
(ALC)
ALC Voltage VO(ALC) VIN=-20dBm,
Muting Attenuation ATT 45 55 dB
ALC Balance BALC VIN=-20dBm 0 2 dB
THD(ALC) VIN=-20dBm,
RIN=2.2KΩ,RL=10KΩ
0.9 1.1 1.42 Vrms
RIN=2.2KΩ,RL=10KΩ
0.26 0.6 mVrms
0.3 1 %
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R110-008,A
2
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