NTE NTE709 Datasheet
NTE709
Integrated Circuit
TV/FM Sound IF Amplifier
Description:
The NTE709 is a monolithic integrated circuit in a 14–Lead DIP type package providing a multi–stage
wideband amplifier/limiter, an FM quadrature detector, and an emitter–follower audio output stage
and is designed for use in FM receivers or in sound IF of TV receivers.
Features:
D Good Sensitivity
D Excellent AM Rejection
D Low Harmonic Distortion
D Single–Adjustment Timing
D High gain to 50MHz
D 500mV Recovered Audio at 10.7MHz
D Wide Operating Voltage Range
Absolute Maximum Ratings:
Supply Voltage, V
Package Power Dissipation, P
CC
D
Derate Above +70°C 8.3mW/°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
Storage Temperature Range, T
Static Electrical Characteristics:
Parameter Symbol Test Conditions Min Typ Max Unit
Supply Current I
Terminal Voltage V
stg
(VCC = 12V, TA = +25°C unless otherwise specified)
CC
1
V
2
V
6
V
9
V
10
15V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
670mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
–20° to +85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 17 27 mA
4.3 5.0 6.3 V
– 3.65 – V
– 1.45 – V
– 1.5 – mV
– 1.45 – V
Static Electrical Characteristics (Cont’d): (VCC = 12V, TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Detector Output Resistance R
IF Input Resistance R
IF Output Resistance R
Detector Input Resistance R
De–Emphasis Resistance R
IF Input Capacitance C
Detector Input Capacitance C
1
4
10
12
14
4
12
– 200 – Ω
– 5.0 – kΩ
– 60 – Ω
– 70 – kΩ
6 9 12 kΩ
– 11 – pF
– 2.7 – pF
Dynamic Characteristics: (VCC = 12V, TA = +25°C, fo = 10.7MHz, fm = 400Hz, ∆f = ±75kHz,
Peak Separation = 550kHz unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Amplifier Voltage Gain A
Amplifier Output Voltage V
Input Limiting Threshold V
Recovered Audio Output V
out
TH
out
Total Harmonic Distortion THD 100% FM Modulation – 1.0 – %
AM Rejection AMR Vin = 10mV
e
Vin ≤ 300µV
Vin = 10mV
rms
rms
– 53 – dB
– 1.45 – V
Note 1 – 400 800 µV
V12 = 60mV
rms
, Note 2 – 40 – dB
rms
– 500 – mV
P–P
rms
rms
Note 1. The input limiting threshold is the FM input voltage for a recovered audio output which is 3dB
less than the recovered audio for an FM input voltage of 200mV
rms
.
Note 2. The amplitude modulation rejection is determined by:
AMR
= 20 log V
dB
Detector Output
Reference
for 100% FM Vin / V
out
Pin Connection Diagram
1
2
N.C.
IF Input
3
4
5Decoupling
6IF Input Ref
7GND
for 30% AM V
out
De–Emphasis
14
13
V
CC
12
Det Input
Test Point
11
in
10 Amplifier Output
9 Amplifier Low Output
8 N.C.
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