Overview
The LMP91000SD/NOPB, produced by Texas Instruments, is a configurable analog front-end (AFE) potentiostat designed for low-power electrochemical cell monitoring. This device provides a complete signal path solution between a sensor and a microcontroller, generating an output voltage proportional to the cell current. It is highly programmable, supporting multiple electrochemical sensors such as 3-lead toxic gas sensors and 2-lead galvanic cell sensors with a single design, thus eliminating the need for multiple discrete solutions.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | WSON-14 |
| Supply Voltage | 2.7 to 5.25 V |
| Current Consumption | < 10 µA |
| Current Range | 5 µA to 750 µA full scale |
| Gas Sensitivity Range | 0.5 nA/ppm to 9500 nA/ppm |
| Interface | I²C for programmability and diagnostics |
| Integrated Temperature Sensor | Yes, readable through VOUT pin |
| Number of Pins | 14 |
| Terminal Pitch | 0.5 mm |
Key Features
- Programmable analog front-end (AFE) for electrochemical sensing applications.
- Supports multiple electrochemical sensors with a single design.
- Adjustable cell bias and transimpedance amplifier (TIA) gain through I²C interface.
- Integrated temperature sensor for signal correction and temperature monitoring.
- Low power consumption, with the ability to switch off the TIA amplifier for further power savings.
- Easy conversion of current ranges from 5 µA to 750 µA full scale.
Applications
The LMP91000SD/NOPB is ideal for various micro-power electrochemical sensing applications, including:
- Toxic gas detection using 3-lead sensors.
- Galvanic cell sensing using 2-lead sensors.
- Environmental monitoring systems.
- Industrial gas detection systems.
- Portable and battery-powered sensing devices.
Q & A
- What is the primary function of the LMP91000SD/NOPB?
The LMP91000SD/NOPB is a configurable analog front-end (AFE) potentiostat designed for low-power electrochemical cell monitoring. - What types of sensors does the LMP91000SD/NOPB support?
It supports multiple electrochemical sensors, including 3-lead toxic gas sensors and 2-lead galvanic cell sensors. - What is the voltage range for the LMP91000SD/NOPB?
The device operates over a voltage range of 2.7 to 5.25 V. - How is the device programmed?
The device is programmed through the I²C interface. - Does the LMP91000SD/NOPB have an integrated temperature sensor?
Yes, it has an integrated temperature sensor that can be read through the VOUT pin. - What is the typical current consumption of the LMP91000SD/NOPB?
The total current consumption can be less than 10 µA. - Can the LMP91000SD/NOPB be used in low-power applications?
Yes, it is optimized for micro-power applications and allows for further power savings by switching off the TIA amplifier. - What is the package type of the LMP91000SD/NOPB?
The package type is WSON-14. - What is the gas sensitivity range supported by the LMP91000SD/NOPB?
The device supports gas sensitivities over a range of 0.5 nA/ppm to 9500 nA/ppm. - Can the LMP91000SD/NOPB be used in portable devices?
Yes, it is suitable for portable and battery-powered sensing devices due to its low power consumption.
