Micropower Sampling 10-Bit A/D Converter
®
SP8537
Micropower Sampling 10-Bit A/D Converter
s s s s s s s s Low Cost 10-Bit Serial Sampling ADC 8-Pin NSOIC Plas...
Description
®
SP8537
Micropower Sampling 10-Bit A/D Converter
s s s s s s s s Low Cost 10-Bit Serial Sampling ADC 8-Pin NSOIC Plastic Package Low Power @ 250µA including Automatic Shutdown: 1nA(typ) Programmable Input Configuration: Full differential or 2 channel single-ended Single Supply 3.0V to 5.5V operation Half Duplex Digital Serial Interface Sample Rate: 33.9µS
DESCRIPTION The SP8537 is a very low power 10-Bit data acquisition chip. TheSP8537 typically draws 250µA of supply current when sampling at 29.5 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 SP8537 is available in 8-Pin NSOIC packages, specified over Commercial, Industrial and Extended temperature ranges. The SP8537 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 or 4 wires.
GND VCC
REFL
REFH
Internal VCC
10
REFL
DAC
REFH
Csample P
CH0 PARALLEL TO SERIAL SHIFT REGISTER
MUX
CH1
COMPARATOR
SAR
Dout
Csample N
DIN
INPUT DATA REG
CS CLK
TIMING & CONTROL LOGIC
SP8537 Block Diagram
SP8537DS/03 SP8537 Micropower Sampling 10–Bit Voltage A/D Converter © Copyright 2000 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratin...
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