Maxim Integrated MAX11211EEE

Description
The MAX11209/MAX11211 are ultra-low-power, high-resolution, serial-output ADCs. They offer the highest resolution per unit power in the industry and are optimized for applications requiring high dynamic range with low power, such as sensors on a 4mA to 20mA industrial control loop. Optional input buffers provide isolation of the signal inputs from the switched capacitor sampling network, allowing these converters to be used with high-impedance sources without compromising dynamic range or linearity. The devices provide a high-accuracy internal oscillator that requires no external components. When used with the specified data rates, the internal digital filter provides more than 100dB rejection of 50Hz or 60Hz line noise. The devices are configurable using the SPI™ interface and include four GPIOs that can be used for external mux control. The MAX11209 includes digital programmable gain of 1 to 128.

Features
18-bit noise-free resolution
570nVRMS noise at 10sps, ±3.6VFS input
3ppm INL (typ), 15ppm (max)
No missing codes
Ultra-low power dissipation
Operating-mode current drain < 300μA (max)
Sleep-mode current drain < 0.4μA
Programmable gain (1 to 128) (MAX11209)
Four SPI-controlled GPIOs for external mux control
2.7V to 3.6V analog supply voltage range
1.7V to 3.6V digital and I/O supply voltage range
Fully differential signal and reference inputs
High-impedance inputs
Optional input buffers on both signal and reference inputs
> 100dB (min) 50Hz/60Hz rejection
SPI-, QSPI™M, MICROWIRE™M-compatible serial interface
On-demand offset and gain self-calibration and system calibration
User-programmable offset and gain registers
-40°C to 85°C operating temperature range
±2kV ESD protection
Lead(Pb)-free and RoHS-compliant QSOP package

Applications
Sensor measurement (temperature and pressure)
Portable instrumentation
Battery applications
Weigh scales