SA577D datasheet(3/7 Pages) PHILIPS

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Philips Semiconductors

Product specification

SA577

Unity gain level programmable low power compandor

1997 Nov 07

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

SA577

UNITS

MIN

TYP

MAX

VCC

Supply voltage1

3.6

ICC

Supply current

No signal

R2 = 100kΩ

1.4

VREF

Reference voltage2

VCC = 3.6V

1.7

1.8

1.9

Summing amp output load

Ω

THD

Total harmonic distortion

1kHz, 0dB, BW = 3.5kHz

0.25

1.5

ENO

Expandor output noise voltage

BW = 20kHz, RS = 0Ω

µV

0dB

Unity gain level

0dB at 1kHz

–1.5

0.18

1.5

Programmable range3

R1 = R3 = 18.7k

Ω, R2 = 24.3kΩ

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

VOS

Output voltage offset

No signal

–150

150

Expandor output DC shift

No signal to 0dB

–100

100

Tracking error relative to 0dB output

-20dB expandor

–1.0

0.3

1.0

Crosstalk, COMP to EXP

1kHz, 0dB, CREF = 10µF

–80

–65

Output swing low

0.2

Output swing high

VCC – 0.2

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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