NTE1744 데이터 시트보기 (PDF) - NTE Electronics

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NTE1744

Integrated Circuit Dual dbxII Noise Reduction System

NTE Electronics 

Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 3V unless otherwise specified)

Parameter

Symbol

Test Conditions

Min Typ Max Unit

Maximum Output Voltage

ENCODE Mode

DECODE Mode

Total Harminic Distortion

(DECODE Mode)

VOME

VOMD

THDD

THD = 1%, f = 1kHz

VO = +14dB, f = 1kHz

80 150 – mV

200 450 – mV

– 0.15 0.3 %

Noise Output Voltage

ENCODE Mode

DECODE Mode

Difference Between Channels

ENCODE Mode

DECODE Mode

Crosstalk (ENCODE Mode)

VNOE Input Short, A–weight

VNOD

– 100 200 µV

– 3 6 µV

CDE VIN = 0dB, f = 1kHz

– 0 1.2 dB

CDD

– 0 1.2

CT Measuring Channel: Short

50 60 – dB

Another Channel: Output 200mV, f = 1kHz

Ripple Rejection Ratio (DECODE Mode) SVRR f = 60Hz, V = 100mV, Input Short

40 55 – dB

Quiescent Current

Input/Output Characteristics

dbx OFF Mode

ICC VCC = 3V, Input Short

VOFF VIN = +20dB, f = 1kHz

– 1.8 3.2 mA

17 20 23 dB

Total Harmonic Distortion

dbx OFF Mode

THDOFF VIN = +20dB, f = 1kHz

– 0.3 1.0 %

Output Noise Voltage (dbx OFF Mode) VnOFF Input Short, A–weight

– 10 20 µV

Note 1. 0dB = 20mV = –34dBV

Pin Connection Diagram

Adjust 1

GND 2

RMS Input A 3

Timing A 4

CCA Input A 5

CAP1 A 6

CAP2 A 7

VOUT A 8

ON/OFF A 9

NI 10

Decode 11

22 VCC

21 N.C.

20 RMS Input B

19 Timing B

18 CCA Input B

17 CAP1 B

16 CAP2 B

15 VOUT B

14 ON/OFF B

13 I Time

12 Encode

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