INA310B2QDGKRQ1

Overview

The INA310B2QDGKRQ1 is an automotive-grade current sense amplifier featuring a fixed gain of 50 V/V. It operates with a common-mode voltage range from –4 V to +110 V and supports supply voltages between 2.7 V and 20 V. The device offers a signal bandwidth of 1.3 MHz, a maximum gain error of 0.5%, and an offset voltage of ±150 µV. It includes an integrated open-drain comparator with a 0.6 V reference threshold and latching capability. The component is housed in an 8-pin VSSOP package.

Feature Summary

• AEC-Q100 qualified for automotive applications with extended temperature operation
• Ultra-precise measurement with low offset voltage and high common-mode rejection
• Integrated open-drain comparator with internal reference and latching functionality
• Wide common-mode input range independent of the power supply voltage

Applications

• Electric turbocharger and charger systems
• Electric power steering (EPS) circuits
• Starter and generator motor control
• Regenerative braking energy management
• Advanced brake system monitoring

Procurement Notes

Verify the specific suffix QDGKRQ1 corresponds to the VSSOP-8 package and tape-and-reel shipping configuration. Confirm that the B-version accuracy specifications meet the design requirements for gain error and offset drift. Ensure the ordering information matches the exact part number for production integration.

Selection Notes

Select this device when high-side or low-side sensing is required over a wide common-mode voltage range up to 110 V. The 50 V/V gain is suitable for applications requiring moderate signal amplification. Consider the integrated comparator for fast overcurrent protection without external logic components.

Part Context

This component belongs to the INA310x-Q1 family of ultra-precise current sense amplifiers designed for automotive environments. The family provides multiple gain options to optimize dynamic range. The B-version offers standard precision compared to the A-version, balancing performance and cost for general automotive sensing tasks.

Replacement Considerations

Direct replacements within the same family include INA310A2QDGKRQ1 for higher precision or other gain variants like INA310B1QDGKRQ1 and INA310B3QDGKRQ1 if different amplification factors are acceptable.

FAQ

How does the RESET pin affect the comparator operation?

Connecting the RESET pin to ground or leaving it open enables transparent mode where the output responds normally. Connecting it to the supply voltage activates latching mode, holding the output high until reset.

What is the maximum survival voltage for the inputs?

The INA310B2QDGKRQ1 can survive input voltages ranging from –20 V to +120 V with respect to ground, although operational limits are –4 V to +110 V.