Overview
The LMP8640HVMK-F/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.
The amplifier is known for its high accuracy over temperature, with fixed gain options of 20 V/V, 50 V/V, and 100 V/V, ensuring a gain accuracy as low as 0.25%. It features a low offset voltage of 900 µV and an input bias current of 13 µA. The device operates with a supply voltage range from 2.7 V to 12 V and is packaged in a 6-pin Thin SOT-23 package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Common-Mode Voltage Range | -2 V to 76 V | V |
| Supply Voltage Range | 2.7 V to 12 V | V |
| Gain Options | 20 V/V, 50 V/V, 100 V/V | V/V |
| Max Gain Error | 0.25% | % |
| Low Offset Voltage | 900 µV | µV |
| Input Bias Current | 13 µA | µA |
| PSRR | 85 dB | dB |
| CMRR (2.1V to 42V) | 103 dB | dB |
| Temperature Range | -40°C to 125°C | °C |
| Package | 6-Pin Thin SOT-23 |
Key Features
- High Common-Mode Voltage Range: The LMP8640HV can handle input signals with common-mode voltages from -2 V to 76 V, making it suitable for high-voltage applications.
- Fixed Gain Options: Available in three fixed gain options (20 V/V, 50 V/V, 100 V/V) to ensure high accuracy over temperature.
- Low Offset Voltage: Features a low offset voltage of 900 µV, which minimizes errors in current sensing.
- Buffered Output: The output is buffered to provide low output impedance, enhancing the device's performance in various applications.
- High PSRR and CMRR: Offers high power supply rejection ratio (PSRR) of 85 dB and common-mode rejection ratio (CMRR) of up to 103 dB, ensuring robust performance against noise and common-mode signals.
- Compact Package: Available in a 6-pin Thin SOT-23 package, which is space-efficient and suitable for a wide range of applications.
Applications
- High-Side Current Sense: Ideal for sensing and monitoring currents in DC or battery-powered systems.
- Vehicle Current Measurement: Suitable for automotive applications, especially with the AEC-Q100 qualified version (LMP8640-Q1).
- Motor Controls: Used in motor control systems where accurate current sensing is crucial.
- Battery Monitoring: Effective in battery management systems for monitoring battery health and performance.
- Power Management: Utilized in power management systems to ensure efficient and reliable operation.
- Industrial and Consumer Applications: Suitable for a variety of industrial and consumer electronics where precise current sensing is required.
Q & A
- What is the common-mode voltage range of the LMP8640HV?
The LMP8640HV can handle input signals with common-mode voltages from -2 V to 76 V.
- What are the available gain options for the LMP8640HV?
The device is available with fixed gain options of 20 V/V, 50 V/V, and 100 V/V.
- What is the supply voltage range for the LMP8640HV?
The supply voltage range is from 2.7 V to 12 V.
- What is the maximum gain error of the LMP8640HV?
The maximum gain error is 0.25%.
- What is the typical offset voltage of the LMP8640HV?
The typical offset voltage is 900 µV.
- What is the input bias current of the LMP8640HV?
The input bias current is 13 µA.
- What is the PSRR of the LMP8640HV?
The power supply rejection ratio (PSRR) is 85 dB.
- What is the CMRR of the LMP8640HV?
The common-mode rejection ratio (CMRR) is up to 103 dB.
- What is the operating temperature range of the LMP8640HV?
The operating temperature range is from -40°C to 125°C.
- In what package is the LMP8640HV available?
The device is available in a 6-pin Thin SOT-23 package.
