TI LMP91000 Configurable AFE Potentiostat
Texas Instruments LMP91000 programmable Analog Front End (AFE) potentiostat is designed for use in micro-power electrochemical sensing applications. TI LMP91000 AFE provides a complete signal path solution between a sensor and a microcontroller that generates an output voltage proportional to the cell current. The programmability of the LMP91000 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. TI LMP91000 AFE 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 5μA to 750μA full scale LMP91000 is optimized for micro-power applications and operates over a voltage range of 2.7V to 5.25V. The total current consumption can be less than 10μA. Further power savings are possible by switching off the TIA amplifier and shorting the reference electrode to the working electrode with an internal switch.