INA296B4QDDFRQ1

Overview

The INA296B4QDDFRQ1 is an ultra-precise, bidirectional current sense amplifier from the Texas Instruments INA296x-Q1 family. It features a fixed gain of 100 V/V and operates with a wide 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 3mA. Key electrical specifications include a maximum gain error of ±0.1%, a maximum input offset voltage of ±150µV, and a bandwidth of 1.1MHz at all gains. It is qualified under AEC-Q100 standards for Grade 1 automotive applications.

Feature Summary

• Bidirectional operation capability for measuring current flow in both directions across shunt resistors.
• Wide common-mode voltage range extending from -5V to 110V, independent of the power supply voltage.
• High-speed signal processing with a small-signal bandwidth of 1.1MHz and a slew rate of 8V/µs.
• Ultra-precise measurement performance characterized by low gain error and low input offset voltage.

Applications

• DC/DC converter current monitoring
• Battery management systems (BMS)
• Fuel cell control units
• Smart junction boxes

Procurement Notes

Verify the specific suffix 'DDF' corresponds to the SOT-23-8 package configuration required for your PCB layout. Confirm that the B-grade accuracy specifications meet your system's tolerance requirements compared to the A-grade variant. Ensure the operating temperature range aligns with your application environment, as this part is specified for Grade 1 conditions.

Selection Notes

Select the INA296B4QDDFRQ1 when a fixed 100 V/V gain is optimal for your shunt resistor value and output dynamic range. Choose this B-grade version if its ±0.1% gain error and ±150µV offset voltage are sufficient for your precision needs. Consider the SOT-23-8 package size constraints and verify that the 1.1MHz bandwidth meets your transient detection speed requirements.

Part Context

This component belongs to the INA296x-Q1 series of high-speed, ultra-precise current sense amplifiers designed for automotive environments. The series offers multiple gain options and package variants. The 'B' designation indicates a specific accuracy grade within the family, while the '4' specifies the 100 V/V gain setting. The 'Q1' suffix denotes AEC-Q100 qualification for automotive use.

Replacement Considerations

Direct functional substitutes within the same family include other INA296B4QDDFRQ1 units or different package versions like INA296B4DGKQ1. For different gain requirements, consider INA296B3QDDFRQ1 (50 V/V) or INA296B5QDDFRQ1 (200 V/V). Cross-family replacements such as the INA241 series offer similar functionality but may differ in common-mode range and precision specifications.

FAQ

What is the maximum common-mode voltage supported by this amplifier?

The INA296B4QDDFRQ1 supports a common-mode voltage range from -5V to 110V.

Does this device support bidirectional current sensing?

Yes, the INA296B4QDDFRQ1 is designed for bidirectional operation, allowing it to measure positive and negative voltage drops across the sense resistor.

What is the signal bandwidth of the INA296B4QDDFRQ1?

The device provides a high small-signal bandwidth of 1.1MHz, which is maintained across all available gain settings.