INA310A2IDGKR

Overview

The INA310A2IDGKR is an ultra-precise current sense amplifier from Texas Instruments featuring a fixed gain of 50 V/V. It operates with a wide 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 slew rate of 2.5 V/µs, and a typical CMRR of 160 dB. Key electrical specifications include a maximum offset voltage of ±80 µV, a maximum gain error of 0.15%, and a quiescent current of 1.6 mA. It is housed in an 8-pin VSSOP package.

Feature Summary

• Integrates an open-drain comparator with a 0.6 V internal reference for overcurrent protection
• Features latching capability on the comparator output controlled by the RESET pin
• Provides high precision through low offset voltage and minimal drift across temperature ranges
• Supports both high-side and low-side sensing independent of the supply voltage

Applications

• 48 V DC/DC converter systems
• 48 V battery management systems (BMS)
• Macro remote radio units (RRU)
• 48 V rack server power supplies
• Solenoids and actuators control

Procurement Notes

Verify the specific suffix IDGKR corresponds to the VSSOP-8 package configuration required for your PCB layout. Confirm that the A-grade accuracy parameters meet your system's tolerance requirements compared to B-grade alternatives. Ensure the operating environment stays within the specified -40°C to +125°C temperature range for guaranteed performance.

Selection Notes

Select this component when a fixed 50 V/V gain is optimal for your shunt resistor value and desired output swing. Consider the 1.3 MHz bandwidth for applications requiring fast transient response. Evaluate the integrated comparator functionality if discrete overcurrent protection circuitry can be eliminated to save board space and component count.

Part Context

This part belongs to the INA310x family of ultra-precise current sense amplifiers. The 'A' designation indicates higher precision specifications regarding offset voltage and gain error compared to the 'B' variant. The '2' suffix denotes the fixed internal gain of 50 V/V, distinguishing it from other gain options like 20 V/V or 100 V/V available in the same series.

Replacement Considerations

INA310A1IDGKR provides a 20 V/V gain option. INA310A3IDGKR provides a 100 V/V gain option. INA310B2IDGKR offers the same 50 V/V gain but with relaxed precision specifications.