INA310A5QDGKRQ1

Overview

The INA310A5QDGKRQ1 is an automotive-grade, ultra-precise current sense amplifier featuring a fixed gain of 500 V/V. It supports a wide common-mode voltage range from –4 V to +110 V and operates on a single supply between 2.7 V and 20 V. Key electrical characteristics include a maximum gain error of 0.15%, a typical common-mode rejection ratio of 160 dB, and a signal bandwidth of 1.3 MHz. The device incorporates an integrated open-drain comparator with a 0.6 V internal reference threshold.

Feature Summary

• Ultra-precise measurement architecture with low offset voltage and minimal drift
• Wide common-mode input range independent of the power supply voltage
• Integrated open-drain comparator with latching capability for fast overcurrent protection
• High-speed response suitable for high-voltage DC current sensing applications

Applications

• Electric turbocharger and compressor control systems
• Electric power steering (EPS) motor drives
• Starter-generator units in hybrid vehicles
• Regenerative braking energy recovery circuits
• Advanced brake system current monitoring

Procurement Notes

Verify the specific suffix 'A5' confirms the 500 V/V gain configuration required for the design. Ensure the Q1 designation aligns with AEC-Q100 Grade 1 automotive reliability standards. Confirm the DGKR package variant matches the PCB footprint requirements for the VSSOP-8 housing.

Selection Notes

Select this component when high-side or low-side sensing requires a fixed high gain of 500 V/V. It is optimal for applications demanding exceptional CMRR and low offset drift across the full automotive temperature range. Consider the integrated comparator if discrete fault detection logic is needed to simplify the bill of materials.

Part Context

This part belongs to the INA310x-Q1 family of ultra-precise current sense amplifiers designed for harsh automotive environments. The family offers various gain options to accommodate different shunt resistor values and dynamic ranges while maintaining consistent precision and bandwidth performance across all variants.

Replacement Considerations

Official substitutes within the same family include INA310B5QDGKRQ1, which shares the 500 V/V gain but features relaxed accuracy specifications. Other family members like INA310A1QDGKRQ1 or INA310A2QDGKRQ1 offer lower gains and may require circuit redesign.

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 immediately. Connecting it to the supply voltage activates latching mode, holding the output high until the pin is reset.

What is the maximum common-mode voltage the device can survive?

While the operational range is up to 110 V, the device can survive transient voltages up to +120 V and down to –20 V without permanent damage.