TA7611AP
LINEAR INTEGRATED CIRCUIT
1
FM IF/AM TUNER SYSTEM
DESCRIPTION
The Contek TA7611AP is a monolithic integrated circuit,
designed for the VIF stage in color and B/W TV receiver. The
UTC TA7611AP is used for Forward AGC type.
FEATURES
*High gain wide brand IF amplifier
*Gain reduction with excellent stability
*Excellent DG/DP and S/N characteristics
*Negative video output signal
*Fast AGC action due to noise inverter and peak AGC
*Switch off the video part VTR SW
FUNCTIONS
*Three controlled IF amplifier stages
*Video demodulator controlled by picture carrier
*Black noise and white noise inverter
*Peak AGC
*DC amplifier for RF AGC output
*Quadrature detector for AFT
*DC amplifier for AFT
DIP-16
BLOCK DIAGRAM
3
14
4
2
16
1
15
13
12
8
9
5
7
10
11
6
NC
NC
NC
NC
Vcc
VIDEO
OUTPUT
NOISE
INVERTER
IF INPUT
AGC1
AGC2
AGC3
RF AGC
RELAY
IF AGC FILTER
IF 2
IF 1
IF 3
VIDEO AMP.
RF AGC
OUTPUT
VIDEO
TANK
Contek
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
TA7611AP
LINEAR INTEGRATED CIRCUIT
2
ABSOLUTE MAXIMUM RATINGS
(Ta=25 C)
PARAMETER
SYMBOL
VALUE
UNIT
Supply Voltage
VCC
15
V
Open Loop Voltage
V4
15
V
Video DC Output Current
I12
6
MA
Power Dissipation
PD
1.4
W
Operating Temperature
TOPR
-20 ~ +65
C
Storage Temperature
TSTG
-55 ~ +150
C
ELECTRICAL CHARACTERISTICS
(Ta=25 C, Vcc=12V, fo=45.75MHz, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN. TYP. MAX.
UNIT
Recommended Supply Voltage
VCC
10.8
12
13.2
V
Quiescent Circuit Current
ICCQ
42
51
63
mA
Video DC Output
V12
5.2
5.5
5.8
V
AFT DC Output Voltage
V5-V6
SW1: on,SW2: on
5.3
6.8
8.3
V
AFT Output Offset Voltage
V5-V6
SW1: on,SW2: on
-1.5
0
1.5
V
RF AGC Residual Output
Voltage
V4(SAT)
SW4:1
0.5
V
RF AGC Leak Current
I4(LEAK)
VCC=12V,SW3:1,SW4:1
1
mA
Video Sensitivity
S
VI
V12=0.8VP-P
f0=45.75MHZ,AM=30%
100
200
300
mVrms
AGC Range
VAGC
(IF)
VCC=12V,f0=45.75MHZ
V14=11.5V 4.0V
60
64
dB
Sync Tip Level Voltage (pin12)
VSYNC
2.3
2.5
2.7
V
Maximum IF Input Voltage
VI
(MAX)
100
120
mVrms
White Noise Threshold (pin12)
V
WTH
5.8
6.2
6.6
V
White Noise Clamp Level (pin12)
V
WCL
3.7
4.1
4.5
V
Black Noise Threshold (pin12)
V
BTH
1.4
1.6
1.8
V
Black Noise Clamp Level (pin12)
V
BCL
2.9
3.3
3.7
V
Video Frequency Response
GV(IF)
Input 45.75MHz, Sweep
Generator
4.5
5.5
MHz
Suppression of Carrier
CL
SG1=100mVrms
SG2, SG3->OFF
40
50
dB
Suppression of 2
nd
Carrier
I2ND
SG1=100Mvrms
SG2, SG3->OFF
40
50
dB
920KHz Beat Level
I920
SG1=100mVrms
SG2=SG3=32mVrms
33
38
dB
Differential Gain
DG
7
10
dB
Differential Phase
DP
3.5
5
Degree
Input Impedance
RIN
CIN
fo=45.75MHz, Between pin16~1
3.0
4.5
2
6
5
K
pF
AFT Output Upper Voltage
V5,V6(UP)
11.7 11.9
12
V
AFT Output Lower Voltage
V5,V6(LOW)
1.8
2.3
2.8
V
Maximum Available Current
I4(MAX)
7
mA
AFT Sensitivity
S
AFT
16
KHz/V
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
TA7611AP
LINEAR INTEGRATED CIRCUIT
3
TEST CIRCUIT 1
TEST CIRCUIT 2
15
14
13
12
11
10
9
2
3
4
5
6
7
8
16
1
1.6kW
1kW
5kW
1kW
75pF
0.01
m
F
1000pF
0.01 mF
0.22
m
F
47 mF
0.01 mF
820k
W
3.9k
W
SW2
1
2
Vcc=12V
VAGC
VIDEO
OUTPUT
1.6k
W
1:1
IF INPUT
S1
1
2
Contek TA7611AP
15
14
13
12
11
10
9
2
3
4
5
6
7
8
16
1
A
A
Contek TA7611AP
0.01 mF
0.01 mF
0.01
m
F
0.01
m
F
0.01 mF
0.01
m
F
0.01 mF
0.01 mF
0.01 mF
0.01 mF
5.1k W
3.3k W
3.9k W
1.6k W
820k
W
47 mF
Vcc=12V
SW1
+15V
SW3
2
1
1.6k W
SW4
1
2
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
TA7611AP
LINEAR INTEGRATED CIRCUIT
4
TEST CIRCUIT 3
TEST CIRCUIT 4
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
TA7611AP
LINEAR INTEGRATED CIRCUIT
5
TYPICAL APPLICATION CIRCUIT
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
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