NTE712 Integrated Circuit TV/FM Sound IF Detector

NTE712
Integrated Circuit
TV/FM Sound IF Detector
Description:
The NTE712 is a versitile device in a 14–Lead DIP type package incorporating IF limiting, detection,
electronic attenuation, audio amplifier, and audio driver capabilities.
Features:
D Differential Peak Detector Requiring a Single Tuned Circuit
D Electronic Attenuator Replaces Conventional AC Volume Control: Range > 60dB
D Excellent AM Rejection @ 4.5 and 5.5MHz
D High Stability
D Low Harmonic Distortion
D Audio Drive Capability: 6.0mAP–P
D Minimum Undesirable Output Signal @ Maximum Attenuation
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Input Signal Voltage (Pin1 and Pin2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3V
Power Supply Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW
Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mW/°C
Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Electrical Characteristics: (V+ = 24V, TA = +25C unless otherwise specified)
Parameter
Pin
Regulated Voltage
5
DC Supply Current
5
Quiescent Output Voltage
12
Test Conditions
V+ = 9V, RS = 0
Min
Typ
Max
Unit
10.3
11.0
12.2
V
10
16
24
mA
5.1
–
–
V
Dynamic Characteristics: (V+ = 24V, TA = +25°C unless otherwise specified)
Parameter
Test Conditions
Min
Typ
Max
Unit
40
51
–
dB
–
200
400
µVrms
IF Amplifier and Detector (fo = 4.5MHz, ∆f = ±25kHz)
AM Rejection
Vin = 10mVrms, Note 1
Input Limiting Threshold Voltage
Recovered Audio Output Voltage
Vin = 10mVrms
0.5
0.7
–
Vrms
Output Distortion
Vin = 10mVrms
–
0.4
2.0
%
Note 1. 100% FM, 30% AM Modulation.
Dynamic Characteristics (Cont’d): (V+ = 24V, TA = +25°C unless otherwise specified)
Parameter
Test Conditions
Min
Typ
Max
Unit
40
53
–
dB
–
200
400
µVrms
IF Amplifier and Detector (fo = 5.5MHz, ∆f = ±50kHz)
AM Rejection
Vin = 10mVrms, Note 1
Input Limiting Threshold Voltage
Recovered Audio Output Voltage
Vin = 10mVrms
0.5
0.91
–
Vrms
Output Distortion
Vin = 10mVrms
–
0.9
–
%
Input Impedance Components
Parallel Input Resistance
f = 4.5MHz, measurement between Pin1 and Pin2
–
17
–
kΩ
–
4
–
pF
–
3.25
–
kΩ
–
3.6
–
pF
–
7.5
–
kΩ
–
250
–
Ω
Parallel Input Capacitance
Output Impedance Components
Parallel Output Resistance
f = 4.5MHz, measurement between Pin9 and GND
Parallel Output Capacitance
Output Resistance
Pin7
Pin8
Attenuator
Volume Reduction Range
DC Volume Control = ∞
60
–
–
dB
Maximum Undesirable Signal
DC Volume Control = ∞, Note 2
–
0.07
1.0
mV
17.5
20.0
–
dB
Audio Amplifier
Voltage Gain
Vin = 0.1Vrms, f = 400Hz
Total Harmonic Distortion
VO = 2Vrms, f = 400Hz
–
2.0
–
%
Output Voltage
THD = 5%, f = 400Hz
2.0
3.0
–
Vrms
Input Resistance
f = 400Hz
–
70
–
kΩ
Output Resistance
f = 400Hz
–
270
–
Ω
Note 1. 100% FM, 30% AM Modulation.
Note 2. Undesirable signal is measured at Pin8 when volume control is set for minimum output.
Pin Connection Diagram
IF In Bias
1
14 Audio Input
IF In
2
13 Tone Control
GND
3
12 Audio Output
GND
4
11 N.C.
V+
5
10 Quad Detector
DC Volume Control
6
9
Quad Detector
De–Emphasis
7
8
Detector Output
14
8
1
7
.300 (7.62)
.785 (19.95) Max
.200 (5.08)
Max
.100 (2.45)
.600 (15.24)
.099 (2.5) Min