NTE709
Integrated Circuit
TV/FM Sound IF Amplifier
Description:
The NTE709 is a monolithic integrated circuit in a 14Lead DIP type package providing a multistage
wideband amplifier/limiter, an FM quadrature detector, and an emitterfollower 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
SingleAdjustment Timing
D
High gain to 50MHz
D
500mV Recovered Audio at 10.7MHz
D
Wide Operating Voltage Range
Absolute Maximum Ratings:
Supply Voltage, V
CC
15V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Power Dissipation, P
D
670mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derate Above +70
C
8.3mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
A
20
to +85
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Static Electrical Characteristics: (V
CC
= 12V, T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Current
I
CC
12
17
27
mA
Terminal Voltage
V
1
4.3
5.0
6.3
V
V
2
3.65
V
V
6
1.45
V
V
9
1.5
mV
V
10
1.45
V
Static Electrical Characteristics (Cont'd): (V
CC
= 12V, T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Detector Output Resistance
R
1
200
IF Input Resistance
R
4
5.0
k
IF Output Resistance
R
10
60
Detector Input Resistance
R
12
70
k
DeEmphasis Resistance
R
14
6
9
12
k
IF Input Capacitance
C
4
11
pF
Detector Input Capacitance
C
12
2.7
pF
Dynamic Characteristics: (V
CC
= 12V, T
A
= +25
C, f
o
= 10.7MHz, f
m
= 400Hz,
f =
75kHz,
Peak Separation = 550kHz unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Amplifier Voltage Gain
A
e
V
in
300
V
rms
53
dB
Amplifier Output Voltage
V
out
V
in
= 10mV
rms
1.45
V
PP
Input Limiting Threshold
V
TH
Note 1
400
800
V
rms
Recovered Audio Output
V
out
V
12
= 60mV
rms
500
mV
rms
Total Harmonic Distortion
THD
100% FM Modulation
1.0
%
AM Rejection
AMR
V
in
= 10mV
rms
, Note 2
40
dB
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
dB
= 20 log V
out
for 100% FM V
in
/ V
out
for 30% AM V
in
V
CC
1
2
3
4
Detector Output
Reference
N.C.
IF Input
5
Decoupling
6
IF Input Ref
7
GND
14
13
12
11
DeEmphasis
Det Input
Test Point
10
Amplifier Output
9
Amplifier Low Output
8
N.C.
Pin Connection Diagram
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