NTE712 datasheet(2/3 Pages) NTE | Integrated Circuit TV/FM Sound IF Detector

2 page

Dynamic Characteristics (Cont’d): (V+ = 24V, TA = +25°C unless otherwise specified)

Parameter

Test Conditions

Min

Typ

Max

Unit

IF Amplifier and Detector (fo = 5.5MHz, ∆f = ±50kHz)

AM Rejection

Vin = 10mVrms, Note 1

–

Input Limiting Threshold Voltage

–

200

400

µVrms

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

–

Ω

Parallel Input Capacitance

–

Output Impedance Components

Parallel Output Resistance

f = 4.5MHz, measurement between Pin9 and GND

–

3.25

–

Ω

Parallel Output Capacitance

–

3.6

–

Output Resistance

Pin7

–

7.5

–

Ω

Pin8

–

250

–

Ω

Attenuator

Volume Reduction Range

DC Volume Control =

∞

–

Maximum Undesirable Signal

DC Volume Control =

∞, Note 2

–

0.07

1.0

Audio Amplifier

Voltage Gain

Vin = 0.1Vrms, f = 400Hz

17.5

20.0

–

Total Harmonic Distortion

VO = 2Vrms, f = 400Hz

–

2.0

–

Output Voltage

THD = 5%, f = 400Hz

2.0

3.0

–

Vrms

Input Resistance

f = 400Hz

–

Ω

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

V+

Tone Control

IF In Bias

IF In

GND

DC Volume Control

De–Emphasis

Audio Input

Audio Output

N.C.

10 Quad Detector

Quad Detector

Detector Output

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