SA577N datasheet(2/4 Pages) PHILIPS

Part #	SA577N

Description	Unity gain level programmable low power compandor

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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Philips Semiconductors RF Communications Products

Product specification

NE/SA577

Unity gain level programmable low power compandor

December 15, 1993

3

ELECTRICAL CHARACTERISTICS

TA = 25°C, VCC = 3.6VDC, compandor 0dB level = –20dBV = 100mVRMS, output load RL = 10kΩ, Freq = 1kHz, unless otherwise specified.

R1, R2 and R3 are 1% resistors.

LIMITS

SYMBOL

PARAMETER

TEST CONDITIONS

NE/SA577

UNITS

MIN

TYP

MAX

VCC

Supply voltage1

2

3.6

7

V

ICC

Supply current

No signal

R2 = 100kΩ

1.4

2

mA

VREF

Reference voltage2

VCC = 3.6V

1.7

1.8

1.9

V

RL

Summing amp output load

10

k

Ω

THD

Total harmonic distortion

1kHz, 0dB, BW = 3.5kHz

0.25

1.5

%

ENO

Expandor output noise voltage

BW = 20kHz, RS = 0Ω

10

25

µV

0dB

Unity gain level

0dB at 1kHz

–1.5

0.18

1.5

dB

Programmable range3

R1 = R3 = 18.7k

Ω, R2 = 24.3kΩ

0

dBV

R1 = R3 = 22.6k

Ω, R2 = 100kΩ

–10

dBV

R1 = R3 = 7.15k

Ω, R2 = 100kΩ

–20

dBV

R1 = R3 = 1.33k

Ω, R2 = 200kΩ

–40

dBV

VOS

Output voltage offset

No signal

–150

1

150

mV

Expandor output DC shift

No signal to 0dB

–100

7

100

mV

Tracking error relative to 0dB output

-20dB expandor

–1.0

0.3

1.0

dB

Crosstalk, COMP to EXP

1kHz, 0dB, CREF = 10µF

–80

–65

dB

VO

Output swing low

0.2

V

Output swing high

VCC – 0.2

V

NOTE:

1. Operation down to VCC = 1.8V is possible, see application note AN1762.

2. Reference voltage, VREF, is typically at 1/2 VCC.

3. Unity gain level can be adjusted CONTINUOUSLY between –40dBV = 10mVRMS and 0dBV = 1.0VRMS. For details see application note

AN1762.

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