MAX11410 24-Bit Multi-Channel Low-Power ADC

Analog Devices' MAX11410 is a low-power, multi-channel, 24-bit delta-sigma ADC with features and specifications that are optimized for precision sensor measurement.

The input section includes a low-noise programmable gain amplifier (PGA) with very high input impedance and available gains from 1x to 128x to optimize the overall dynamic range. Input buffers provide isolation of the signal inputs from the switched-capacitor sampling network when the PGA is not in use, making the ADC easy to drive even with high-impedance sources.

Several integrated features simplify precision sensor applications. The programmable matched current sources provide excitation for resistive sensors. An additional current sink and current source aid in detecting broken sensor wires. The 10-channel input multiplexer provides the flexibility needed for complex, multi-sensor measurements. GPIOs reduce isolation components and ease control of switches or other circuitry.

When used in single-cycle mode, the digital filter settles within a single conversion cycle. The available FIR digital filter allows single-cycle settling in 16 ms while providing more than 90 dB simultaneous rejection of 50 Hz and 60 Hz line noise.

The integrated on-chip oscillator requires no external components. If needed, an external clock source may be used instead. Control registers and conversion data are accessed through the SPI-compatible serial interface.