SA577 [NXP]

Unity gain level programmable power compandor; 单位增益级可编程电源扩


型号：	SA577
厂家：	NXP
描述：	Unity gain level programmable power compandor 单位增益级可编程电源扩
文件：	总7页 (文件大小：63K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

RF COMMUNICATIONS PRODUCTS

SA577

Unity gain level programmable power

compandor

Product specification

Replaces data of December 15, 1993

1997 Nov 07

IC17 Data Handbook

Philip s Se m ic ond uc tors

Philips Semiconductors

Product specification

Unity gain level programmable low power compandor

SA577

DESCRIPTION

PIN CONFIGURATION

The SA577 is a unity gain level programmable compandor designed

for low power applications. The SA577 is internally configured as an

expandor and a compressor to minimize external component count.

D Package

GCELL

RECT

EXP

COMP

CAP2

CAP

OUT

FEATURES

CAP1

EXP

• Operating voltage range: 1.8V to 7V

RECT

REF

• Low power consumption (1.4mA @ 3.6V)

GCELL

REF

GND

• 0dB level programmable (10mV

• Over 90dB of dynamic range

to 1.0V

)

RMS

COMP

RMS

OUT

SR00716

Figure 1. Pin Configuration

• Wide input/output swing capability (rail-to-rail)

• Low external component count

• SA577 meets cellular radio specifications

• ESD hardened

APPLICATIONS

• High performance portable communications

• Cellular radio

• Cordless telephone

• Consumer audio

• Wireless microphones

• Modems

• Electric organs

• Hearing aids

• Automatic level control (ALC)

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

SA577D

DWG #

–40 to +85°C

14-Pin Plastic Small Outline (SO)

SOT108-1

ABSOLUTE MAXIMUM RATINGS

RATING

SYMBOL

PARAMETER

UNITS

SA577

Supply voltage

°C

Operating ambient temperature range

Storage temperature range

–40 to +85

STG

–65 to +150

125

°C

Thermal impedance

°C/W

1997 Nov 07

853-1535 18666

Philips Semiconductors

Product specification

Unity gain level programmable low power compandor

SA577

ELECTRICAL CHARACTERISTICS

T = 25°C, V = 3.6VDC, compandor 0dB level = –20dBV = 100mV

, output load R = 10kΩ, Freq = 1kHz, unless otherwise specified.

RMS

R1, R2 and R3 are 1% resistors.

LIMITS

SYMBOL

PARAMETER

TEST CONDITIONS

SA577

TYP

3.6

UNITS

MIN

MAX

Supply voltage

No signal

R = 100kΩ

Supply current

1.4

1.8

REF

Reference voltage

= 3.6V

1.7

1.9

Summing amp output load

Total harmonic distortion

kΩ

THD

1kHz, 0dB, BW = 3.5kHz

0.25

1.5

Expandor output noise voltage

Unity gain level

BW = 20kHz, R = 0Ω

µV

0dB

0dB at 1kHz

R1 = R3 = 18.7kΩ, R2 = 24.3kΩ

R1 = R3 = 22.6kΩ, R2 = 100kΩ

R1 = R3 = 7.15kΩ, R2 = 100kΩ

R1 = R3 = 1.33kΩ, R2 = 200kΩ

No signal

–1.5

0.18

1.5

Programmable range

–10

–20

–40

dBV

Output voltage offset

–150

–100

–1.0

150

100

1.0

Expandor output DC shift

Tracking error relative to 0dB output

Crosstalk, COMP to EXP

Output swing low

No signal to 0dB

-20dB expandor

0.3

–80

0.2

1kHz, 0dB, C

= 10µF

–65

REF

Output swing high

– 0.2

NOTE:

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

2. Reference voltage, V

, is typically at 1/2 V

REF

3. Unity gain level can be adjusted CONTINUOUSLY between –40dBV = 10mV

and 0dBV = 1.0V

. For details see application note

RMS

AN1762.

1997 Nov 07

Philips Semiconductors

Product specification

Unity gain level programmable low power compandor

SA577

BLOCK DIAGRAM and TEST AND APPLICATION CIRCUIT

10k

GAINCELL

EXP

10k

∆G

10µF

R1*

10k

RECTIFIER

COMP

CAP2

RECT

2.2µF

30k

10k

EXP

CAP

2.2µF

COMP

10µF

EXPANDOR

COMP

CAP1

EXP

OUT

10µF

2.2µF

RECTIFIER

10k

8.6k

REF

RECT

10µF

R3*

REF

10k

BANDGAP

GCELL

∆G

GAINCELL

REF

COMPRESSOR

R2*

10µF

GND

COMP

OUT

10µF

GND

*R1, R2 and R3 are 1% resistors.

SR00717

Figure 2. Block Diagram and Test and Application Circuit

1997 Nov 07

Philips Semiconductors

Product specification

Unity gain level programmable low power compandor

SA577

TYPICAL PERFORMANCE CHARACTERISTICS

= 3.6V, T = 25°C, R1=R3=7.15kΩ, R2=100kΩ, 0dB level = 100mV, Freq. = 1kHz

SUPPLY CURRENT vs TEMPERATURE

SUPPLY CURRENT vs SUPPLY VOLTAGE

1.6

1.8

1.5

1.6

1.4

1.3

1.2

1.1

0.8

0.6

-40

-20

100

SUPPLY VOLTAGE (V)

AMBIENT TEMPERATURE (°C)

UNITY GAIN ERROR vs SUPPLY VOLTAGE

UNITY GAIN ERROR vs TEMPERATURE

0.6

0.4

0.2

0.6

0.4

0.2

NOTE: UNITY GAIN ERROR MAY BE

SET TO 0 AT ANY V

ADJUSTING THE VALUE OF R1, R3

EXPANDOR

COMPRESSOR

-0.2

-0.4

-0.6

-0.2

-0.4

-0.6

-20

SUPPLY VOLTAGE (V)

TEMPERATURE (°C)

TRACKING ERROR vs INPUT LEVEL

THD vs TEMPERATURE

0.5

0.4

0.3

0.2

0.1

0.5

NOTE: RELATIVE

TO UNITY GAIN

COMPRESSOR

EXPANDOR

COMPRESSOR

-0.5

-1

-20

SR00715

INPUT LEVEL (dB)

TEMPERATURE (°C)

Figure 3. Typical Performance Characteristics

1997 Nov 07

Philips Semiconductors

Product specification

Unity gain level programmable power compandor

SA577

SO14: plastic small outline package; 14 leads; body width 3.9 mm

SOT108-1

1997 Nov 07

Philips Semiconductors

Product specification

Unity gain level programmable power compandor

SA577

DEFINITIONS

Data Sheet Identification

Product Status

Definition

This data sheet contains the design target or goal specifications for product development. Specifications

may change in any manner without notice.

Objective Specification

Formative or in Design

This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips

Semiconductors reserves the right to make changes at any time without notice in order to improve design

and supply the best possible product.

Preliminary Specification

Product Specification

Preproduction Product

Full Production

This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes

at any time without notice, in order to improve design and supply the best possible product.

Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,

including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips

Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,

or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask

work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes

only. PhilipsSemiconductorsmakesnorepresentationorwarrantythatsuchapplicationswillbesuitableforthespecifiedusewithoutfurthertesting

or modification.

LIFE SUPPORT APPLICATIONS

Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,

orsystemswheremalfunctionofaPhilipsSemiconductorsandPhilipsElectronicsNorthAmericaCorporationProductcanreasonablybeexpected

to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips

Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully

indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.

Philips Semiconductors

811 East Arques Avenue

P.O. Box 3409

Sunnyvale, California 94088–3409

Telephone 800-234-7381

Philips

Semiconductors

1997 Nov 07

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