Overview
The LMP91200MT/NOPB device, manufactured by Texas Instruments, is a sensor Analog Front-End (AFE) designed for low-power, analytical-sensing applications. It is specifically tailored for use with 2-electrode sensors. This device provides all the necessary functionality to detect changes based on a delta voltage at the sensor, making it ideal for applications requiring precise and low-power sensing.
Key Specifications
| Specification | Value |
|---|---|
| Supply Voltage | 1.8 V to 5.5 V |
| Supply Current | 50 µA |
| Operating Temperature Range | –40°C to 125°C |
| Package | 16-Pin TSSOP |
| pH Buffer Input Bias Current (0 < VINP < 3.3 V) | Maximum at 25°C: ±125 fA, Maximum at 85°C: ±445 fA |
| pH Buffer Input Bias Current (–500 mV < VINP – VCM < 500 mV), VS = 0 V | Maximum at 25°C: ±600 fA, Maximum at 85°C: ±6.5 pA |
| pH Buffer Input Offset Voltage | ±200 µV |
| pH Buffer Input Offset Voltage Drift | ±2.5 µV/°C |
Key Features
- Active Guarding: Provides support for high parasitic impedance wiring.
- Low Input Bias Current: Optimized for use with pH sensors, reducing degradation of the pH probe.
- Low Power Consumption: Total current consumption of 50 µA while measuring pH.
- Wide Operating Temperature Range: Operates from –40°C to 125°C.
Applications
The LMP91200MT/NOPB is designed for low-power, analytical-sensing applications, particularly those involving 2-electrode sensors. It is well-suited for use in chemical sensing, pH measurement, and other applications where precise and low-power sensing are critical.
Q & A
- What is the primary application of the LMP91200MT/NOPB?
The LMP91200MT/NOPB is primarily used in low-power, analytical-sensing applications, especially with 2-electrode sensors. - What is the supply voltage range of the LMP91200MT/NOPB?
The supply voltage range is from 1.8 V to 5.5 V. - What is the typical supply current of the LMP91200MT/NOPB?
The typical supply current is 50 µA. - What is the operating temperature range of the LMP91200MT/NOPB?
The operating temperature range is from –40°C to 125°C. - What type of package does the LMP91200MT/NOPB come in?
The device comes in a 16-Pin TSSOP package. - What is the maximum pH buffer input bias current at 25°C?
The maximum pH buffer input bias current at 25°C is ±125 fA. - Does the LMP91200MT/NOPB support high parasitic impedance wiring?
Yes, it supports high parasitic impedance wiring through its active guarding feature. - Is the LMP91200MT/NOPB still in production?
No, the LMP91200MT/NOPB is scheduled for obsolescence and will be discontinued by the manufacturer. - What is the pH buffer input offset voltage of the LMP91200MT/NOPB?
The pH buffer input offset voltage is ±200 µV. - What is the pH buffer input offset voltage drift of the LMP91200MT/NOPB?
The pH buffer input offset voltage drift is ±2.5 µV/°C.
