廬
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 @ 250碌A(chǔ) 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: 33.9碌S
DESCRIPTION
The
SP8537
is a very low power 10-Bit data acquisition chip. TheSP8537 typically draws 250碌A(chǔ)
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鈥揃it Voltage A/D Converter
漏 Copyright 2000 Sipex Corporation
1