NTE NTE7057

NTE7057
Integrated Circuit
TV SIF/AFT/RF AGC
Description:
The NTE7057 is an integrated circuit in a 12−Lead SIP type package designed for providing a high
performance SIF for a TV. This device adopts a quasi−parallel inter−carrier detection system for good
sound reproduction.
Features:
D
D
D
D
D
D
3−Stage Inter−Carrier Amplifier and Inter−Carrier Detector
High Response Speed Peak AGC using Double AGC Time Constant
Single AFT Output
Reverse AGC
Carrier Synchronous Video Detector
White Noise Inverter Circuits
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltate, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 890mW
Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.12mW/°C
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +150°C
Electrical Characteristics: (TA = +25°C, VCC = 9V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
DC Stage
Supply Voltage
VCC
8.1
9.0
9.9
V
Supply Current
ICC
20
30
40
ma
Terminal Voltage
V1
3.3
4.5
5.7
V
V3
3.6
4.0
4.4
V
V4
3.6
4.0
4.4
V
V5(1)
SW: A
8.8
−
−
V
V5(2)
SW: B
−
−
0.1
V
V9
5.6
6.2
6.8
V
V10
5.6
6.2
6.8
V
V11
2.5
3.0
3.5
V
V12
4.0
4.5
5.0
V
Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 9V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
AC Stage
Input Sensitivity
VINmin Note 1
−
75
180
μVrms
Maximum IF Input Voltage
VINmax
74
−
−
mVrms
IF AGC Range
ΔA
Note 2
50
60
−
dB
Differential Gain
DG
Note 3
−
−
10
%
Differential Phase
DP
Note 3
−
−
5
deg.
Video DC Voltage
V12
Note 4
4.0
4.5
5.0
V
Sync. Tip Level
VSYNC
Note 5
2.15
2.35
2.55
V
Video Output Level
VOUT
Note 6
1.45
−
2.05
V
White Noise Threshold
VWHT
Note 7
−
5.2
−
V
White Noise Clamp Level
VWCL
Note 7
−
3.5
−
V
CL
Note 8
40
−
−
dB
I 2nd
Note 9
40
−
−
dB
ΔF/ΔV
Note 10
−
−
37
kHz/V
Carrier Suppression
2nd Harm. Suppression
AFT Sensitivity
AFT Output
920kHz Beat
Lower
VU
0
−
0.3
V
Upper
VL
8.0
−
9.0
V
30
38
−
dB
I920
Note 11
Note 1. PIF IN: f = 58.75MHz, fm = 1kHz, 30% AM Modulation.
Adjust PIF input level so that the detected output of P12 with high impedance probe will be
6VP−P and measure the input level.
Note 2. Measure PIF Input Level V1, V2 same as Note 1.
Apply P7 = 9V at V1
Apply P7 = 3V at V2
ΔA = 20log (V1/V2) (dB)
Note 3. Gain Reduction = 40dB.
PIF IN: CW f = 58.75MHz, APL 50%, 87.5% AM Modulation.
(1) Setting ATT so that the sync tip level of P12 will be 2V DC.
(2) Measure DG and DP.
Note 4. PIF IN: No Signal.
Measure output level of P12.
Note 5. PIF IN: f = 58.75MHz CW 15mVrms.
Measure DC level of P12.
Note 6. PIF IN: f = 58.75MHz, APL 100% 15mVrms.
Measure detected output voltage.
Note 7. PIF IN: f = 58.75MHz ±10MHz variable or sweep 15mVrms.
Measure DC level of P12.
Note 8. PIF IN: 58.75MHz, 1kHz, 87.5% AM Modulation 15mVrms.
(1) Setting AGC so that output AC level of P12 will be 2VP−P.
(2) Measure CL of P12 after setting 0% AM of SG.
Note 9. Measure I 2nd carrier of P12 same as Note 8.
Note10. PIF IN: SG = VARIABLE, 15mVrms CW.
(1) P1 DC voltage will be 4.5V.
(2) Apply SG signal to P3 and measure P1 voltage change.
Note 11. SG1: 58.75MHz (P: Picture) 15mVrms.
SG2: 54.25MHz (S: Sound) −6dB of SG1
SG3: 55.17MHz (C: Chroma) −6dB of SG1
(1) Setting AGC so that the output tip level of P12 will be 2VP−P.
(2) Measure the level difference (dB) between C−Level and 920kHz Level.
Pin Connection Diagram
(Front View)
12 Video Output
11 AFT Tank
10 Video Tank
9
Video Tank
8
IFAGC Filter 1
7
IF AGC Filter 2
6
GND
5
RF AGC Output
4
IF Input
3
IF Input
2
VCC
1
AFT Output
.846 (21.5)
.0110 (2.8)
.224
(5.7)
.011
(0.3)
.070
(1.78)
.018
(0.46)
.039
(1.0)
.130
(3.3)
.010
(0.25)