INA290A1IDCKR

Overview

The INA290A1IDCKR is a high-side, single-channel current-sense amplifier from the INAx290 family. It operates with a supply voltage of 2.7 V to 20 V and supports a common-mode input range of 2.7 V to 120 V. The device features a fixed gain of 20 V/V, a typical DC common-mode rejection ratio (CMRR) of 160 dB, and a bandwidth of 1.1 MHz. Key electrical specifications include a maximum offset voltage of ±25 µV, an input bias current of 20 µA, and a quiescent current of 370 µA per channel.

Feature Summary

• Ultra-precise zero-drift architecture enables accurate measurement of low sense voltages across extended temperature ranges.
• High-speed performance with 1.1 MHz bandwidth and 2 V/µs slew rate for rapid overcurrent detection.
• Wide common-mode voltage range up to 120 V with excellent DC and AC common-mode rejection ratios.

Applications

• Active antenna system mMIMO
• Macro remote radio unit (RRU)
• 48-V rack server power supplies
• Test and measurement equipment

Procurement Notes

Verify the specific A1 suffix indicates the 20 V/V gain configuration required for your circuit design. Confirm the DCKR package designation corresponds to the SC-70-5 form factor suitable for space-constrained layouts. Ensure compatibility with the intended operating temperature range of -40°C to +125°C before finalizing procurement.

Selection Notes

Select this component when high-side sensing is required with a wide common-mode voltage range up to 120 V. The 20 V/V gain option is optimal for applications requiring a wider dynamic range compared to higher gain variants. Consider the 370 µA quiescent current and 1.1 MHz bandwidth for systems prioritizing speed and precision over ultra-low power consumption.

Part Context

This device belongs to the INAx290 series of ultra-precise current-sense amplifiers manufactured by Texas Instruments. The series includes dual-channel (INA2290) and quad-channel (INA4290) variations. The INA290 specifically provides a single-channel solution in a compact SC-70 package, designed for high-performance industrial and communication infrastructure applications.

Replacement Considerations

INA290A2IDCKR

FAQ

What is the maximum common-mode voltage supported by the INA290A1IDCKR?

The device supports a common-mode voltage range from 2.7 V to 120 V.

How does the gain affect the bandwidth of the INA290A1IDCKR?

At the fixed 20 V/V gain of the A1 variant, the device achieves a bandwidth of 1.1 MHz.

Is the INA290A1IDCKR suitable for bidirectional current sensing?

No, the INAx290 topology is designed specifically for high-side, unidirectional current-sensing applications.