General Description

The MAX11359A smart data-acquisition systems (DAS) is based on a 16-bit, sigma-delta analog-to-digital converter (ADC) and system-support functionality for a microprocessor (µP)-based system. The device integrates an ADC, DAC, operational amplifiers, internal selectablevoltage 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 512sps 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 Analog Switches

♦ Selectable References

    1.25V, 1.996V and 2.422V

♦ Internal Charge Pump

♦ System Support

    Real-Time Clock 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 0.75mm), 40-Pin TQFN Package

Applications

    Battery-Powered and Portable Devices

    Electrochemical and Optical Sensors

    Medical Instruments

    Industrial Control

    Data-Acquisition Systems