Lowest power, low-noise sigma-delta ADC for precision measurements
Claiming the lowest power for devices in this category, Maxim suggests you might use it in automatic test equipment, high-precision portable sensors, medical equipment, scientific instrumentation, or in seismic data acquisition
Sample rates up to 32ksps allow both precision DC and AC measurements; integral nonlinearity is guaranteed to 4ppm maximum. The THD is -122dB. The MAX11214 communicates via an SPI-compatible serial interface and is available in a small 24-pin TSSOP package. The device includes a 6.5nV/√Hz noise programmable gain amplifier with gain settings between 1x to 128x. Optional buffers are also included to provide isolation of the signal inputs from the switched capacitor sampling network. This allows the ADC to be used with high-impedance sources without compromising available dynamic range.
The MAX11214 operates from a single 2.7V to 3.6V analogue supply, or split ±1.8V analogue supplies, allowing the analogue input to be sampled below ground. The digital supply range is 2.0V to 3.6V, allowing communication with 2.5V, 3V, or 3.3V logic.
Maxim Integrated; https://www.maximintegrated.com/en/products/analog/data-converters/analog-to-digital-converters/MAX11214.html
next page; feature list
MAX11214: Key Features
High resolution for instrumentation applications that require a wide dynamic range
134 dB SNR at 15.6 sps
124 dB SNR at 500 sps
21-bit noise-free resolution at 50 sps
18.6-bit noise-free resolution at 1 ksps
Longer battery life for portable applications
1.2 mA operating mode current from AVDD
2.6 mA PGA low-noise mode current from AVDD
1 μA sleep current
High accuracy for DC measurements
1 ppm INL (typ), 4ppm (max)
Single or split analog supplies provide input voltage range flexibility
2.7V to 3.6V (single supply) or ±1.8V (split supplies)
Flexible high-performance filter architecture simplifies design
Programmable SINC + FIR + IIR
Linear or minimum phase response
Programmable highpass filter
Selectable FIR data rates: 62.5 sps to 8 ksps
Enables system integration
Low-Noise PGA with gains of 1, 2, 4, 8, 16, 32, 64, 128
Signal buffer optional
3 general-purpose I/Os
Enables integrated part and system calibration capability for gain and offset
Robust 24-pin TSSOP packaging
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