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