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廬

SP8528

Micropower Sampling 12-Bit A/D Converter

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Low Cost

12-Bit Serial Sampling ADC

Guaranteed +1.0 LSB Max INL

Guaranteed No Missing Codes

8-Pin NSOIC Plastic Package

Low Power @ 230碌A(chǔ) including

Automatic Shutdown: 1nA (typ)

Full differential input stage

Single Supply 3.0V to 5.5V operation

Half Duplex Digital Serial Interface

Sample Rate: 30.12碌S

Pin Compatible Upgrade to LTC 1286

DESCRIPTION

The

SP8528

is a very low power 12-Bit A/D converter. The

SP8528

typically draws 230碌A(chǔ) of

supply current when sampling at 33.2 kHz. Supply current drops linearly as the sample rate is

reduced. The ADC automatically powers down when not performing conversions, drawing only

leakage current. The

SP8528

is available in 8-Pin NSOIC packages, specified over Commercial

and Industrial temperature ranges. The

SP8528

is best suited for Battery-Operated Systems,

Portable Data Acquisition Instrumentation, Battery Monitoring, and Remote Sensing

applications. The serial port allows efficient data transfer to a wide range of microprocessors and

microcontrollers over 3 wires.

GND

VCC

REFL

Internal

VCC

12

REFL

DAC

VREF

Csample P

+IN

PARALLEL TO

SERIAL SHIFT

REGISTER

INPUT

SWITCHES

-IN

COMPARATOR

SAR

Dout

Csample N

CS/SHDN

SCLK

TIMING &

CONTROL LOGIC

SP8528 Block Diagram

SP8528DS/01

SP8528 Micropower Sampling 12-Bit A/D Converter

漏 Copyright 2000 Sipex Corporation

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