INA310B2IDGKR

Overview

The INA310B2IDGKR is a Texas Instruments ultra-precise 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 a supply voltage between 2.7 V and 20 V. Key electrical characteristics include a maximum offset voltage of ±300 µV, a typical CMRR of 140 dB, and a signal bandwidth of 1.3 MHz. The device integrates an open-drain comparator with a 0.6 V internal reference and latching capability.

Feature Summary

• Ultra-precise zero-drift architecture for high accuracy
• Wide common-mode voltage range independent of supply
• Integrated open-drain comparator with latching function
• High-speed response suitable for fast overcurrent protection

Applications

• 48 V DC/DC converter systems
• 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 tape and reel packaging configuration required for automated assembly processes. Confirm that the B version specifications align with the design requirements regarding offset voltage and gain error tolerances before finalizing procurement orders.

Selection Notes

Select this component when high-side or low-side sensing is required within a wide common-mode voltage window up to 110 V. The fixed 50 V/V gain optimizes dynamic range for specific shunt resistor values. Ensure the application benefits from the integrated comparator for simplified overcurrent protection circuitry without external logic components.

Part Context

This part belongs to the INA310x family of ultra-precise current sense amplifiers. The 'B' designation indicates a specific accuracy grade with higher offset voltage limits compared to the 'A' variant. The IDGKR suffix denotes the surface-mount VSSOP-8 package optimized for space-constrained PCB layouts in modern electronic equipment.

Replacement Considerations

INA310A2IDGKR offers similar functionality with tighter precision specifications including lower offset voltage and drift.

FAQ

How does the RESET pin affect the comparator operation?

Grounding or leaving the RESET pin 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 INA310B2IDGKR can withstand input voltages ranging from -20 V to +120 V with respect to ground, exceeding its operational range of -4 V to +110 V.