SP8528 Просмотр технического описания (PDF) - Signal Processing Technologies

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SP8528

Micropower Sampling 12-Bit A/D Converter

Signal Processing Technologies 

®

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 @ 230µA 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: 30.12µS

s Pin Compatible Upgrade to LTC 1286

DESCRIPTION

The SP8528 is a very low power 12-Bit A/D converter. The SP8528 typically draws 230µA 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

INPUT

SWITCHES

-IN

Csample N

COMPARATOR

SAR

PARALLEL TO

SERIAL SHIFT

REGISTER

Dout

CS/SHDN

SCLK

SP8528 Block Diagram

SP8528DS/01

TIMING &

CONTROL LOGIC

SP8528 Micropower Sampling 12-Bit A/D Converter

1

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