24-Bit, Single-Channel, Ultra-Low-Power, Delta Sigma ADC with 2-Wire Serial Interface

The MAX11201 is an ultra-low-power (< 320µA max active current), high-resolution, serial-output ADC. This device provides the highest resolution per unit power in the industry and is optimized for applications that require very high dynamic range with low power such as sensors on a 4mA to 20mA industrial control loop. The MAX11201 provides 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 MAX11201 provides a simple 2-wire serial interface in the space-saving, 10-pin µMAX® package.

The MAX11201 operates over the -40°C to +85°C temperature range.

Applications

* Battery Applications * Portable Instrumentation * Sensor Measurement (Temperature and Pressure) * Weigh Scales

* 23.3-Bit ENOB * 20.6-Bit Noise-Free Resolution at 13.75sps

* 19.1-Bit Noise-Free Resolution at 120sps

* 700nVRMS Noise ±3.6VFS Input (MAX11201B)

* INL: 3ppm (typ), 10ppm (max)

* No Missing Codes

* Ultra-Low Power Dissipation

* Operating Mode Current Drain < 320µA (max) * Sleep Mode Current Drain < 0.4µA

* 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 * Buffers on Signal Inputs

* Programmable Internal System Clock or External Clock

* 2.4576MHz (MAX11201A) * 2.25275MHz (MAX11201B)

* > 100dB (min) 50Hz/60Hz Rejection (MAX11201B)

* Serial 2-Wire Interface (Clock Input and Data Output)

* On-Demand Offset and Gain Self-Calibration

* -40°C to +85°C Operating Temperature Range

* ±2kV ESD Protection

* Lead(Pb)-Free and RoHS-Compliant µMAX Package