NTE742 查看數據表（PDF） - NTE Electronics

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NTE742

Integrated Circuit TV Sound Channel, 2W

NTE Electronics 

Dynamic Electrical Characteristics:

(TA = +25°C, VCC = 24V, fo = 4.5MHz, fm = 400Hz, ∆f = 25kHz, VIN = 10mV unless otherwise specified)

Parameter

Symbol

Test Conditions

Min Typ Max Unit

Input Limiting Threshold

AM Rejection

VTH

AMR

Note 1

Note 2

– 150 400 µV

30 > 50 – dB

Recovered Audio

Total Harmonic Distortion

VOUT

THD

Test Pin16

500 700 900 mV

– <1 3 %

Volume Control Voltage

Test Pin6, POUT = 2W

V1

–3dB, Note 3

–20dB, Note 3

– 2.5 10 %

6.0 7.5 10 V

2.0 2.8 4.0 V

–40dB, Note 3

0.75 1.2 1.8 V

Playthrough

Power Amp Voltage Gain

Output Current Limiting

Output Tracking

Output Noise

Power Amp Impedance

Ae

IOUT

VOUT/VCC

en

Zin

V1 = 0V

VOUT = 1V

RL = 0Ω

VCC = 18V to 27V

VIN = 0V, V1 = 10V

f = 1kHz

– 5 25 mV

25 27 29 dB

– 800 – mA

– 0.5 – V/V

– 5 25 mV

– 50 – kΩ

Note 1. Adjust V1 for VOUT = 2V, then reduce VIN until VOUT = 1.4V (–3dB).

Note 2. Adjust V1 for VOUT = 2V.

Note 3. Reference is VOUT at Pin 6 with V1 = 12V.

Pin Connection Diagran

DC Volume Control 1

Detector Output 2

Amplifier Input 3

F

GND i

n

Audio Output 6

VCC 7

Regulator Output 8

16 De–Emphasis

15 Phase Shift

14 Phase Shift

F

i GND

n

11 IF Decoupling

10 IF Input

9 Low–Level GND

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