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Product Detailed Parameters
- Description：-5-V TO 110-V BIDIRECTIONAL HIGH
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Amplifier Type：Current Sense
- Number of Circuits：1
- Output Type：Single-Ended
- Slew Rate：8V/µs
- Gain Bandwidth Product：-
- Current - Input Bias：35 µA
- Voltage - Input Offset：25 µV
- Current - Supply：2.5mA
- Current - Output / Channel：-
- Voltage - Supply Span (Min)：2.7 V
- Voltage - Supply Span (Max)：20 V
- Operating Temperature：-40°C ~ 125°C (TA)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- -3db Bandwidth：1.1 MHz
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Overview
The INA241B3IDR is a bidirectional current sense amplifier from the Texas Instruments INA241B series, featuring a fixed gain of 50 V/V. It operates with a supply voltage range of 2.7V to 20V and supports a common-mode input voltage range from -5V to 110V. The device provides high precision with a maximum gain error of ±0.1% and an offset voltage of ±150µV. It includes enhanced PWM rejection for switching systems, a bandwidth of 1.1MHz, and a slew rate of 8V/µs. The component is housed in an SOIC-8 package.
Feature Summary
- Enhanced PWM rejection circuitry minimizes output signal disturbances caused by large common-mode voltage transients at the inputs.
- Bidirectional operation allows accurate measurement of voltage drops across shunt resistors over a wide common-mode range independent of supply voltage.
- Zero-drift architecture ensures low offset voltage and drift for precise measurements of low VSENSE levels across the operating temperature range.
Applications
- Motor drives
- Solenoids and actuators
- Injection molding machines
- Cordless power tools
Procurement Notes
Verify the specific ordering suffix IDR corresponds to the SOIC-8 tape and reel packaging configuration required for your assembly process. Confirm that the B-series accuracy specifications meet the system requirements, as they differ from the A-series. Ensure the selected gain of 50 V/V aligns with the expected full-scale output voltage and dynamic current range of the application design.
Selection Notes
Select this part when high-side, inline, or low-side sensing is required within a -5V to 110V common-mode range. The 50 V/V gain is suitable for applications needing higher output swing relative to small shunt voltages. Consider the SOIC-8 package for standard surface-mount assembly. Verify that the ±0.1% gain error and ±150µV offset are acceptable for the target measurement precision.
Part Context
This component belongs to the INA241x family of ultra-precise, bidirectional current sense amplifiers designed for high-voltage measurements in switching systems. The family offers multiple gain options and package variants to optimize performance for various industrial and automotive applications requiring robust common-mode rejection and fast response times.
Replacement Considerations
INA241A3IDR (Same gain, higher precision A-series)
FAQ
What is the maximum switching frequency supported by the enhanced PWM rejection?
The enhanced PWM rejection feature supports switching frequencies up to 125kHz.
How does the input bias current behave across the common-mode voltage range?
The input bias current remains constant at approximately 35µA across the entire common-mode voltage range, unlike many other high-voltage amplifiers where it varies with voltage.
