SP8528DS/01

SP8528 Micropower Sampling 12-Bit A/D Converter

© Copyright 2000 Sipex Corporation

1

SP8528

Micropower Sampling 12-Bit A/D Converter

s Low Cost

s 12-Bit Serial Sampling ADC

s Guaranteed +1.0 LSB Max INL

s Guaranteed No Missing Codes

s 8-Pin NSOIC Plastic Package

s Low Power @ 230

µA including

Automatic Shutdown: 1nA (typ)

s Full differential input stage

s Single Supply 3.0V to 5.5V operation

s Half Duplex Digital Serial Interface

s Sample Rate: 30.12

µS

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

µA 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.

Internal

VCC

VCC

GND

REFL

DAC

REFL

Csample P

Csample N

+IN

-IN

SAR

PARALLEL TO

SERIAL SHIFT

REGISTER

12

CS/SHDN

SCLK

TIMING &

CONTROL LOGIC

Dout

VREF

COMPARATOR

INPUT

SWITCHES

SP8528 Block Diagram

®