Overview
The LMP8640HVMKX-H/NOPB is a precision high-voltage current sense amplifier produced by Texas Instruments. This device is part of the LMP8640 family, which includes the LMP8640, LMP8640-Q1, and LMP8640HV. The LMP8640HV is specifically designed to handle high common-mode voltage ranges from -2 V to 76 V, making it ideal for sensing and monitoring currents in DC or battery-powered systems. It operates with a supply voltage range of 2.7 V to 12 V and is available in a 6-pin thin SOT-23 package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Common-mode voltage range | -2 to 76 | V |
| Supply voltage range | 2.7 to 12 | V |
| Gain options | 20 V/V, 50 V/V, 100 V/V | |
| Max gain error | 0.25% | |
| Low offset voltage | 900 µV | |
| Input bias current | 13 µA | |
| PSRR | 85 dB | |
| CMRR (2.1V to 42V) | 103 dB | |
| Temperature range | -40°C to 125°C | |
| Package | 6-Pin Thin SOT-23 |
Key Features
- High common-mode voltage range from -2 V to 76 V, making it suitable for high-voltage applications.
- Fixed gain options of 20 V/V, 50 V/V, and 100 V/V with a gain accuracy as low as 0.25%.
- Low offset voltage of 900 µV and low input bias current of 13 µA.
- High power supply rejection ratio (PSRR) of 85 dB and common-mode rejection ratio (CMRR) of 103 dB.
- Buffered output to provide low output impedance.
- Operating temperature range from -40°C to 125°C.
- Available in a compact 6-pin thin SOT-23 package.
Applications
- High-side current sensing in DC or battery-powered systems.
- Vehicle current measurement and motor controls.
- Battery monitoring and remote sensing devices.
- Power management systems.
- Industrial and consumer applications, with the LMP8640-Q1 version suitable for automotive applications due to its AEC-Q100 grade 1 qualification.
Q & A
- Q: What is the common-mode voltage range of the LMP8640HV?
A: The LMP8640HV has a common-mode voltage range from -2 V to 76 V.
- Q: What are the gain options available for the LMP8640HV?
A: The LMP8640HV is available with fixed gain options of 20 V/V, 50 V/V, and 100 V/V.
- Q: What is the maximum gain error of the LMP8640HV?
A: The maximum gain error of the LMP8640HV is 0.25%.
- Q: What is the input bias current of the LMP8640HV?
A: The input bias current of the LMP8640HV is 13 µA.
- Q: What is the temperature range of the LMP8640HV?
A: The LMP8640HV operates over a temperature range from -40°C to 125°C.
- Q: In what package is the LMP8640HV available?
A: The LMP8640HV is available in a 6-pin thin SOT-23 package.
- Q: What are some typical applications of the LMP8640HV?
A: Typical applications include high-side current sensing in DC or battery-powered systems, vehicle current measurement, motor controls, battery monitoring, and power management systems.
- Q: Is the LMP8640HV suitable for automotive applications?
A: While the LMP8640HV itself is not specifically qualified for automotive applications, the LMP8640-Q1 version is AEC-Q100 grade 1 qualified and suitable for such use.
- Q: What is the PSRR of the LMP8640HV?
A: The power supply rejection ratio (PSRR) of the LMP8640HV is 85 dB.
- Q: What is the CMRR of the LMP8640HV?
A: The common-mode rejection ratio (CMRR) of the LMP8640HV is 103 dB from 2.1 V to 42 V.
