LMP91000SD/NOPB

Sample & Buy Product Folder Support & Community Tools & Software Technical Documents LMP91000 SNAS506I – JANUARY 2011 – REVISED DECEMBER 2014 LMP91000 Sensor AFE System: Configurable AFE Potentiostat for Low-Power ChemicalSensing Applications 1 Features 3 Description • • • • • 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. It also allows for an easy conversion of current ranges from 5 µA to 750 µA full scale. 1 • • • • • • • • • • Typical Values, TA = 25°C Supply Voltage 2.7 V to 5.25 V Supply Current (Average Over Time)