The MAX11358B 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. These devices integrate 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.
The MAX11358B has dual 10:1 differential input multiplexers (muxes) that accept signal levels from 0 to AVDD. An on-chip 1x to 8x programmable-gain amplifier (PGA) allows measuring low-level signals and reduces external circuitry required.
The MAX11358B operates from a single +1.8V to +3.6V supply and consumes only 1.15mA in normal mode and only 3µA in sleep mode. The MAX11358B has two DACs with one uncommitted op amp.
The serial interface is compatible with either SPI™/QSPI™ or MICROWIRE™, and is used to power up, configure, and check the status of all functional blocks.
The MAX11358B is available in a space-saving, 40-pin TQFN package and is specified over the commercial (0°C to +70°C) and the extended (-40°C to +85°C) temperature ranges.
Key Features
Applications/Uses
+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
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 0.8mm), 40-Pin TQFN Package
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