The LMP91000 is a programmable Analog Front End (AFE) for use in micro-power electrochemical sensing applications. It provides a complete signal path solution between a sensor and a microcontroller that generates an output voltage proportional to the cell current. The LMP91000’s programmability enables it to support multiple electrochemical sensors such as 3-lead toxic gas sensors and 2-lead galvanic cell sensors with a single design as opposed to the multiple discrete solutions.The LMP91000 supports gas sensitivities over a range of 0.5 nA/ppm to 9500 nA/ppm. This Circuit Analysis Report is delivered in ICWorks Browser for navigation of the schematics. It provides a partial extraction of the die including, Transimpedance Amplifier, Control Amplifier, Programmable RTIA, Programmable RLoad, Variable VREF, VREF Divider, Temperature Sensor, I2C Interface and Control Buffers Registers, Power-Up Detector, Pad Bias and Load Control, Switches, Input Pad Logic.