UTC TA7668BP LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R110-008,A
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)
DIP-16
BLOCK DIAGRAM
7
8
10
6
11
DET
3
4
15
14
16
2
5
12
9
13
1
ALC
Rec
AMP
Rec
AMP
Pre
AMP
Pre-
AMP
Ch1 Pre-Out
and Rec in
Ch1 Rec
Output
Mute
Input
Mute
Outpu
t
Vcc
Vs
Rec
GND
Mute
Output
Ch2 Rec
Output
Pre
GND
Ch2 Pre-Out
and Rec In
Ch2 Pre IN NF
Ch2 Pre IN
ALC
Ch1 Pre IN NF
Ch1 Pre IN
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 TA7668BP LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R110-008,A
DC VOLTAGE
(V
CC
=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=2.2K
, B.P.F., NAB,
30Hz~20kHz
0.26
0.6
mVrms
Cross Talk
C.T.
Rg=2.2K
47
60
dB
REC AMPLIFIER
Closed Loop Voltage Gain
GV
RL=10K
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=2.2K
45
dB
Total Harmonic Distortion
(ALC)
THD(ALC)
VIN=-20dBm,
RIN=2.2K
,RL=10K
0.3
1
%
ALC Voltage
VO(ALC)
VIN=-20dBm,
RIN=2.2K
,RL=10K
0.9
1.1
1.42
Vrms
Muting Attenuation
ATT
45
55
dB
ALC Balance
BALC
VIN=-20dBm
0
2
dB
UTC TA7668BP LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R110-008,A
TEST METHOD
SYMBOL
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
Measure
Terminal
ICCQ
*
*
*
*
*
*
*
*
OFF
*
Vcc
GVO
OFF
CH1
GVO FLAT
CH1
*
*
*
OFF
OFF
Pre-Out
VOM(1)
OFF
CH1
GV
NAB
CH1
*
*
*
OFF
OFF
Pre-Out
THD(1)
OFF
CH1
GV
NAB
CH1
*
*
*
OFF
OFF
Pre-Out
VNO
OFF
OFF
GV
NAB
CH2
*
*
OFF
OFF
Pre-Out
CT
OFF
CH1
GV
FLAT CH1
CH2
*
*
*
OFF
OFF
Pre-Out
GV
OFF
CH1
GV
FLAT
CH1
*
CH1
CH2
OFF
OFF
Pre-Out
Rec-Out
VOM(2)
OFF
CH1
GV
FLAT
CH2
*
CH1
CH2
OFF
OFF
Rec-Out
THD(2)
OFF
CH1
GV
FLAT
CH2
*
CH1
CH2
OFF
OFF
Rec-Out
RALC
OFF
CH1
GV
FLAT
CH2
*
CH1
CH2
OFF
ON
Rec-Out
THD(ALC)
OFF
CH1
GV
FLAT
CH2
*
CH1
CH2
OFF
ON
Rec-Out
VO(ALC)
OFF
CH1
GV
FLAT
CH2
*
CH1
CH2
OFF
ON
Rec-Out
ATT
OFF
CH1
GV
FLAT
CH1
*
*
CH1 OFF
ON
OFF
Mute-Out
BALC
CH2
CH1
CH2
GV
FLAT
*
*
CH1
CH2
*
OFF
ON
Rec-Out
UTC TA7668BP LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R110-008,A
TEST CIRCUIT
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