AD5940 Datasheet (Analog Devices) - High Precision Impedance and Electrochemical Front-End

AD5940, High Precision Impedance and Electrochemical Front-End

Specifications 7 ADC RMS Noise Specifications 16 SPI Timing Specifications17 Absolute Maximum Ratings18 Thermal Resistance 18 ESD Caution18 Pin Configuration and Function Descriptions 19 Typical Performance Characteristics 22 Reference Test Circuit 24 Theory of Operation25 Configuration Registers25

AD5940 Features

* SPI serial input/output

* Analog input

* 16-bit ADC with both 800 kSPS and 1.6 MSPS options

* Voltage, current, and impedance measurement capability

* Internal and external current and voltage channels

* Ultralow leakage switch matrix and input mux

* Input buffers and