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CS5507-AA

Very Low Power, 16-Bit and 20-Bit A/D Converters

Cirrus Logic 

CS5505/6/7/8

Very Low Power, 16-Bit and 20-Bit A/D Converters

Features

l Very Low Power Consumption

- Single supply +5 V operation: 1.7 mW

- Dual supply ±5 V operation: 3.2 mW

l Offers superior performance to VFCs and

multi-slope integrating ADCs

l Differential Inputs

- Single Channel (CS5507/8) and Four-Channel

(CS5505/6) pseudo-differential versions

l Either 5 V or 3.3 V Digital Interface

l Linearity Error:

- ±0.0015% FS (16-bit CS5505/7)

- ±0.0007% FS (20-bit CS5506/8)

l Output update rates up to 100/second

l Flexible Serial Port

l Pin-Selectable Unipolar/Bipolar Ranges

Description

The CS5505/6/7/8 are a family of low power CMOS A/D

converters which are ideal for measuring low-frequency

signals representing physical, chemical, and biological

processes.

The CS5507/8 have single-channel differential analog

and reference inputs while the CS5505/6 have four

pseudo-differential analog input channels. The

CS5505/7 have a 16-bit output word. The CS5506/8

have a 20-bit output word.The CS5505/6/7/8 sample

upon command up to 100 output updates per second.

The on-chip digital filter offers superior line rejection at

50 and 60 Hz when the device is operated from a

32.768 kHz clock (output word rate = 20 Hz.).

The CS5505/6/7/8 include on-chip self-calibration cir-

cuitry which can be initiated at any time or temperature

to ensure minimum offset and full-scale errors.

The CS5505/6/7/8 serial port offers two general-purpose

modes for the direct interface to shift registers or syn-

chronous serial ports of industry-standard

microcontrollers.

ORDERING INFORMATION

See page 30.

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Cirrus Logic, Inc.

Crystal Semiconductor Products Division

P.O. Box 17847, Austin, Texas 78760

(512) 445 7222 FAX: (512) 445 7581

http://www.crystal.com

Copyright © Cirrus Logic, Inc. 1997

(All Rights Reserved)

MAR ‘95

DS59F4

1

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