General Description
The MAX1358B smart data-acquisition system (DAS) is based on a 16-bit, sigma-delta analog-to-digital converter (ADC) and system-support functionality for a microprocessor (µP)-based system. This device integrates an ADC, DACs, operational amplifiers, internal selectable-voltage reference, temperature sensors, analog switches, a 32kHz oscillator, a real-time clock (RTC) with alarm, a high-frequency-locked loop (FLL) clock, four user-programmable I/Os, an interrupt generator, and 1.8V and 2.7V voltage monitors in a single chip.

Features
♦ +1.8V to +3.6V Single-Supply Operation
♦ Multichannel, 16-Bit, Sigma-Delta ADC
   10sps to 477sps Programmable Conversion Rate
   Self- and System Offset and Gain Calibration
   PGA with Gains of 1, 2, 4, or 8
   Unipolar and Bipolar Modes
   10-Input Differential Multiplexer
♦ 10-Bit Force-Sense DACs
♦ Uncommitted Op Amps
♦ Dual SPDT and SPST Analog Switches
♦ Selectable References
   1.25V, 2.048V, and 2.5V
♦ Internal Charge Pump
♦ System Support
   RTC and Alarm Register
   Internal/External Temperature Sensor
   Internal Oscillator with Clock Output
   User-Programmable I/O and Interrupt Generator
   VDD Monitors
♦ SPI/QSPI/MICROWIRE, 4-Wire Serial Interface
♦ Space-Saving (6mm x 6mm x 0.8mm), 40-Pin TQFN Package

Applications
   Battery-Powered and Portable Devices
   Electrochemical and Optical Sensors
   Medical Instruments
   Industrial Control
   Data-Acquisition Systems