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