LMP91000SDE Datasheet PDF - TI

●The LMP91000SDE is a configurable AFE Potentiostat for low-power chemical sensing. 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 supports gas sensitivities over a range of 0.5 to 9500nA/ppm. It also allows for an easy conversion of current ranges from 5 to 750µA full scale. The potentiostat"s adjustable cell bias and trans-impedance amplifier (TIA) gain are programmable through the I²C interface. The I²C interface can also be used for sensor diagnostics. An integrated temperature sensor can be read by the user through the VOUT pin and used to provide additional signal correction in the µC or monitored to verify temperature conditions at the sensor. This potentiostat is optimized for micro-power applications and operates over a voltage range of 2.7 to 5.25V. The total current consumption can be less than 10µA.

● <10µA Supply current

● Up to 10mA cell conditioning current

● 900pA Maximum reference electrode bias current

● 750µA Output drive current

● Complete potentiostat circuit-to-interface to most chemical cells

● Programmable cell bias voltage

● Low-bias voltage drift

● Sink and source capability

● I²C Compatible digital interface

● Supported by WEBENCH® sensor AFE designer

●This device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.