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Product Detailed Parameters
- Description：-5-V TO 110-V, BIDIRECTIONAL, 1.
- 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 INA296B3IDR is a bidirectional current sense amplifier from the Texas Instruments INA296x family, housed in an 8-pin SOIC package. It features a fixed gain of 50 V/V and operates with a common-mode voltage range from -5V to 110V. The device supports a supply voltage between 2.7V and 20V, drawing a typical quiescent current of 2.5mA. Key electrical specifications include a bandwidth of 1.1MHz, a slew rate of 8V/µs, and a maximum gain error of ±0.1% over the operating temperature range of -40°C to +125°C.
Feature Summary
- Supports bidirectional current measurement across a wide common-mode voltage range independent of the supply voltage.
- Delivers high-speed signal processing capabilities with a 1.1MHz bandwidth and fast settling time for transient detection.
- Provides ultra-precise measurements through low offset voltage and minimal gain error drift characteristics.
Applications
- 48V DC/DC Converter
- 48V battery management systems (BMS)
- Test & Measurement
- Macro remote radio unit (RRU)
- 48V rack server
Procurement Notes
Verify that the ordering suffix IDR corresponds to the SOIC-8 package variant. Confirm the B version designation aligns with the required accuracy specifications, specifically the ±0.1% maximum gain error limit. Ensure the component meets the necessary thermal and environmental standards for the intended deployment environment before finalizing procurement.
Selection Notes
Select this part when a fixed 50 V/V gain is optimal for the system's shunt resistor value and output dynamic range requirements. The B version offers higher gain error tolerance compared to the A version but maintains sufficient precision for many industrial applications. Consider the SOIC-8 package if board space constraints favor standard surface-mount footprints over smaller alternatives like SOT-23 or VSSOP.
Part Context
This component belongs to the INA296x series of ultra-precise, bidirectional current sense amplifiers designed for high-voltage and high-speed applications. The series provides multiple gain options to accommodate various sensing configurations while maintaining consistent performance metrics such as bandwidth and input bias current across all gain variants.
Replacement Considerations
INA296A3IDR: Offers superior accuracy with lower gain error and offset voltage specifications.
FAQ
How does the INA296B3IDR handle bidirectional current flow?
It measures the differential voltage across a shunt resistor in both directions by utilizing reference pins to set the output baseline, allowing positive and negative current detection relative to the reference voltage.
What is the maximum common-mode voltage supported?
The device supports a common-mode voltage range from -5V to 110V, which is independent of the power supply voltage applied to the VS pin.
