The LMP91000SDE from Texas Instruments is a highly-integrated, configurable Analog Front End (AFE) optimized for use in micro-power electrochemical sensing applications. This advanced sensor AFE solution is designed to support a wide range of sensors, including those used to measure gas concentrations such as CO, NO<sub>2, and O<sub>2. It is an ideal choice for portable and fixed gas detectors, as well as industrial, environmental, and safety monitoring devices.

Key Features

• Configurable Potentiostat: The LMP91000SDE is equipped with a programmable potentiostat that allows for the adjustment of bias voltage, ensuring compatibility with various electrochemical sensors.
• Programmable Gain Amplifier (PGA): It includes a PGA with selectable gain settings, providing amplification of the sensor signal to match the input range of the analog-to-digital converter (ADC).
• Low Power Consumption: Designed for battery-powered applications, the LMP91000SDE operates with a low power consumption, which is critical for long-term, continuous monitoring tasks.
• Temperature Compensation: The device features an on-chip temperature sensor that aids in providing accurate readings across varying environmental conditions.
• Flexible Operating Modes: It supports multiple operation modes, including a sleep mode for power savings and a 3-lead amperometric sensor mode for additional sensor types.

Technical Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Interface: I<sup>2C compatible two-wire interface
• Package: 14-lead WSON
• Operating Temperature Range: -40°C to +85°C

The LMP91000SDE simplifies the design of electrochemical sensor systems by integrating critical features into a single chip, thereby reducing system complexity and cost. Its flexibility and ease of use make it a go-to AFE solution for developers and manufacturers of gas detection systems. With its robust feature set, the LMP91000SDE enables the rapid deployment of high-performance, reliable, and accurate gas sensing solutions.