NTE NTE708 Datasheet

NTE708

Integrated Circuit

TV/FM Sound IF Amplifier

Features:

D Greatly Simplifier FM Demodulator Alignment
D Excellent Performance at V+ = 8V

Absolute Maximum Ratings:

(TA = +25°C unless otherwise specified)

Power Supply Voltage 16V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Peak Input Voltage (Pin4) 3.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Dissipation (T

= +25°C), P

A

D

625mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Derate Above 25°C 5mW/°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Ambient Temperature Range, T
Storage Temperature Range, T

Electrical Characteristics:

Parameter Pin Test Conditions Min Typ Max Unit

Drain Current 13 V+ = 8V 10 12 19 mA

Amplifier Input Reference Voltage 6 – 1.45 – V
Detector Input Reference Voltage 2 – 3.65 – V
Amplifier High Level Output Voltage 10 1.25 1.45 1.65 V
Amplifier Low Level Output Voltage 9 – 0.145 0.2 V
Detector Output Voltage 1 V+ = 8V – 3.7 – V

stg

(V+ = 12V, TA = +25°C unless otherwise specified)

opr

V+ = 12V – 15 21 mA

V+ = 12V – 5.4 – V

0° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Amplifier Input Resistance 4 – 5.0 – kΩ
Amplifier Input Capacitance 4 – 11 – pF
Detector Input Resistance 12 – 70 – kΩ
Detector Input Capaciance 12 – 2.7 – pF
Amplifier Output Resistance 10 – 60 – Ω
Detector Output Resistance 1 – 200 – Ω
De–Emphasis Resistance 14 – 8.8 – kΩ

Dynamic Characteristics: (FM Modulation Freq = 1kHz, Source Resistance = 50Ω,

T

= +25°C for all tests)

A

Parameter Pin Test Conditions Min Typ Max Unit

(V+ = 12V, fo = 4.5MHz, ∆f = ±25kHz, Peak Separation = 150kHz)
Amplifier Voltage Gain 10 Vin ≤ 50µV
AM Rejection 1 Vin = 10mV

rms

, Note 1 – 36 – dB

rms

– 60 – dB

Input Limiting Threshold Voltage 4 – 250 – µV
Recovered Audio Output Voltage 1 Vin = 10mV
Output Distortion 1 Vin = 10mV

rms
rms

– 0.72 – V
– 3 – %

(V+ = 12V, fo = 5.5MHz, ∆f = ±50kHz, Peak Separation = 260kHz)
Amplifier Voltage Gain 10 Vin ≤ 50µV
AM Rejection 1 Vin = 10mV

rms

, Note 1 – 40 – dB

rms

– 60 – dB

Input Limiting Threshold Voltage 4 – 250 – µV
Recovered Audio Output Voltage 1 Vin = 10mV
Output Distortion 1 Vin = 10mV

rms
rms

– 1.2 – V
– 5 – %

(V+ = 8V, fo = 10.7MHz, ∆f = ±75kHz, Peak Separation = 550kHz)
Amplifier Voltage Gain 10 Vin ≤ 50µV
AM Rejection 1 Vin = 10mV

rms

, Note 1 – 37 – dB

rms

– 53 – dB

Input Limiting Threshold Voltage 4 – 600 – µV
Recovered Audio Output Voltage 1 Vin = 10mV
Output Distortion 1 Vin = 10mV

rms
rms

– 0.3 – V
– 1.4 – %

(V+ = 12V, fo = 10.7MHz, ∆f = ±75kHz, Peak Separation = 550kHz)

rms

rms

rms

rms

rms

rms

Amplifier Voltage Gain 10 Vin ≤ 50µV
AM Rejection 1 Vin = 10mV

rms

, Note 1 – 45 – dB

rms

– 53 – dB

Input Limiting Threshold Voltage 4 – 600 – µV
Recovered Audio Output Voltage 1 Vin = 10mV
Output Distortion 1 Vin = 10mV

rms
rms

– 0.48 – V
– 1.4 – %

Note 1. 100% FM, 30% AM Modulation.

Pin Connection Diagram

Audio Output

Detector Input Ref

N.C.

IF Input

1
2
3
4
5Decoupling

6IF Input Ref
7GND

14

De–Emphasis

V

13

CC

12

Det Input (QuadratureNetwork)

11

Test Point

10 Amplifier Output

9 Amplifier Low Output
8 N.C.

rms

rms