Texas Instruments INA791B Bidirectional Current Sense Amplifier
Texas Instruments INA791B Bidirectional Current Sense Amplifier features an integrated shunt resistor of 400µΩ and is designed to monitor bidirectional current over a common-mode range of -4V to 110V, independent of the supply voltage. An adjustable gain option helps to optimize the system's dynamic range. The INA791B voltage output amplifier provides a wide common-mode voltage range and high measurement accuracy. Texas Instruments INA791B Bidirectional Current Sense Amplifier operates from a single 2.7V to 5.5V power supply, drawing a supply current of 3.75mA maximum. The series is available in a 15-pin VQFN package and offers an extended operating temperature range of -40°C to +125°C.
Features
- Precision solution with integrated shunt resistor
- Wide common-mode voltage range
- High speed
- Analog gain set
- High measurement accuracy
- Adjustable gain with external resistor divider network
- VQFN-15 package
Applications
- 48V DC/DC converters
- 48V battery management systems (BMS)
- Test and measurement
- Macro remote radio units (RRU)
- 48V rack servers
- 48V merchant networks and server power supplies (PSU)
Specifications
- 75A continuous current (maximum)
- 400µΩ shunt resistor
- 2nH shunt inductance
- 110V common-mode voltage (maximum)
- -4V common-mode voltage (minimum)
- 1% gain error
- 130dB common mode rejection ratio (CMRR) (minimum)
- 1MHz bandwidth
- 5.5V supply voltage (maximum)
- 2.7V supply voltage (minimum)
- -40°C to +125°C operating temperature range
Typical Application
Related Amplifiers
Texas Instruments INA790A/INA790B Bidirectional Amplifiers
Designed with enhanced PWM rejection circuitry to suppress large (dv/dt) common-mode signals.
Evaluation Modules
Texas Instruments INA79xEVM Evaluation Modules
Allows users to evaluate the INA790x and INA791x current-sense amplifiers.
Published: 2024-05-31
| Updated: 2025-02-03