YOUDA INTEGRATED CIRCUIT
YD7312
DUAL RECORDING/PLAYBACK PREAMPLIFIER
CIRCUIT WITH ALC——YD7312
DESCRIPTION
The YD7312 is a monolithic integrated circuit designed for dual pre-amplifier circuit with ALC for
recording/playback amplifier of cassette tape recorder.
FEATURES
*High open loop gain
*Incorporates ALC detector circuit
*No input coupling condenser
*Low noise and current consumption
*Wide ALC range
*Wide operating voltage range: Vcc=5~12 V
*Low power on shock noise
BLICK DIAGRAM
14
13
12
11
10
AMP
CH1
ALC
AMP
CH2
1
2
3
4
5
6
7
9
8
RIPPLE
FILTER
WuXi YouDa Electronics Co., Ltd
Tel:
Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China
86-510-85205117
86-510-85205106
Fax: 86-510-85205110
Website: www.e-youda.com
SHENZHEN OFFICE Tel: 86-755-83740369
Fax: 86-755-83741418
Ver 5. 0
1 of 3
2006-07-30
YOUDA INTEGRATED CIRCUIT
OUTLINE FUNCTION
PIN
1
2
3
4
5
6
7
Name
GND
T.C.
ALC
IN
ALC
1
OUT1
P.
COM
NF1
IN1
Function
GND
ALC Time Parameter
ALC Input 1
Output 1
Phase Compensation 1
Feedback 1
Input 1
PIN
8
9
10
11
12
13
14
Name
IN2
NF2
P.
COM
OUT2
IN
ALC
2
R.F.
Vcc
YD7312
Function
Input 2
Feedback 2
Phase Compensation 2
Output 2
ALC Input 2
Ripple Filter
Voltage Supply
ABSOLUTE MAXIMUM RATINGS
CHARACTERISTIC
Supply Voltage
Supply Current
Power Dissipation
Operating Temperature
Storage Temperature
(Tamb=25℃)
VALUE
14
50
700
-55 to +125
-65 to +150
UNIT
V
mA
mW
℃
℃
SYMBOL
Vcc
Icc
P
D
Topr
Tstr
ELECTRICAL CHARACTERISTICS
(Tamb=25℃, Vcc=6V, f=1kHz, unless otherwise specified)
CHARACTERISTIC
Quiescent Current
Operating Voltage
Closed Loop Voltage Gain
Total Harmonic Distortion
Output Voltage
Output Noise Voltage
ALC Voltage
ALC Width
ALC Balance
SYMBOL
Iccq
Vcc
Gv
THD
Vo
V
NO
V
ALC
W
ALC
ΔGv
Vo=0.5V
Vo=0.5V
THD=1%
Rg=0(internal resistance
1.5kΩ DIN/Audio)
Vin=400μV
Beginning 0dB to 3dB
Vo=0.5V
0.55
35
-1
1.2
TEST CONDITION
Vin=0
MIN
2.5
5.0
66
69
0.5
1.6
2.0
0.63
47
0
+1
5.0
0.7
TYP
4.5
MAX
8.0
12.0
72
1.0
UNIT
mA
V
dB
%
V
mV
V
dB
dB
WuXi YouDa Electronics Co., Ltd
2 of 3
Website: www.e-youda.com