DESCRIPTION
The SP8538is a very low power 12-Bit data acquisition chip. The SP8538typically draws 250µA
of supply current when sampling at 25 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 SP8538is available in 8-Pin NSOIC packages, specified over Commercial
and Industrial temperature ranges. The SP8538is 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.

■Low Cost
■12-Bit Serial Sampling ADC
■Guaranteed +1.0 LSB Max INL
■Guaranteed No Missing Codes
■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: 40µS
■Pin Compatible Upgrade to LTC 1298