General Description
The MAX11209/MAX11211 are ultra-low-power (< 300FA active current), high-resolution, serial-output ADCs. These devices provide the highest resolution per unit power in the industry, and are optimized for applications that require very high dynamic range with low power, such as sensors on a 4mA to 20mA industrial control loop.

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™-, MICROWIRE™-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