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廬

SP8542/SP8544

Two and Four Channel 12-Bit Multiplexed

Sampling ADCs

s

s

s

s

s

s

s

s

Two or Four Channel Input Mux

12 Bit Resolution

Single +5Volt Supply

Internal 1.25 Volt Reference

Unipolar 0 to +2.5 Volt Input Range

Fast, 3.75

碌s

Conversion Time per Channel

Fast Power Shutdown/Turn-On Mode

3-Wire Synchronous Serial High Speed

Interface

s

2碌A(chǔ) Shutdown Mode (10碌W)

s

Low Power CMOS 42mW typical

DESCRIPTION

The

SP8542

(2 channel) and

SP8544

(4 channel) are 12-Bit serial in/out data acquisition systems

with a bi-directional serial interface. The devices contain a high speed 12-Bit analog to digital

converter, internal reference, and a 2 or 4 channel input mux which drives the internal sample/

hold circuitry. The

SP8542

is available in 16-pin PDIP and SOIC packages, and the

SP8544

is available in 18-pin PDIP and SOIC packages, specified over Commercial and Industrial

temperature ranges.

CONTROL

LOGIC

MUX

Register

CS

SCLK

DIN

CH0

CH1

*CH2

*CH3

COUNTER

STATUS

SAR

MUX

CDAC

OFFSET

ADJUST

SHUTDOWN

RTRIM

BUFFER

REF.

LATCHED

COMPARATOR

D

OUT

GAIN

ADJUST

REF OUT

SP8542 - 2 CHANNEL MUX

*SP8544 - 4 CHANNEL MUX

SP8542/8544DS/01

SP8542/8544 Two and Four Channel 12-Bit Multiplexed Sampling ADC's

漏 Copyright 2000 Sipex Corporation

1

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