Texas Instruments INA2290A2IDGKT

Overview

INA2290A2IDGKT from Texas Instruments is a dual-channel, ultra-precise current-sense amplifier designed for high-side sensing in 48-V and 120-V power rails. It delivers ±0.1% gain error, ±12 µV max input offset voltage, and 1.1-MHz bandwidth at 50 V/V gain - enabling accurate real-time current monitoring in telecom and server power systems.

For engineers reviewing the INA2290A2IDGKT datasheet, INA2290A2IDGKT pinout, INA2290A2IDGKT application, or INA2290A2IDGKT equivalent, key selection criteria include its 50 V/V fixed gain, 2.7–20-V supply range, −40°C to +125°C operation, and VSSOP-8 package compatibility with high-density PCB layouts.

Technical Context

The INA2290A2IDGKT uses a transconductance architecture with current-feedback amplification to achieve low input bias current (20 µA typ) and high common-mode rejection - 160 dB DC CMRR and 85 dB AC CMRR at 50 kHz. Its zero-drift topology ensures stable offset performance across temperature.

This dual-channel device operates exclusively in high-side configurations, with independent IN+1/IN−1 and IN+2/IN−2 inputs referenced to up to +120 V common-mode voltage. Each channel features identical 50 V/V gain, 1.1-MHz bandwidth, and rail-to-rail output swing capability.

Key Specifications

Pinout & Package

The INA2290A2IDGKT is housed in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm, optimized for thermal performance (R_θJA = 169.3°C/W) and high-density placement in multi-rail power subsystems.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense amplifier applications.

Compared with INA240A2IDR and MAX40056AUB+, the INA2290A2IDGKT uniquely combines 120-V common-mode tolerance, 1.1-MHz bandwidth, and ±12-µV offset in a dual-channel VSSOP package - making it the only option qualified for high-reliability 48-V/120-V telecom power monitoring where space, accuracy, and transient immunity are co-constrained.

Availability

INA2290A2IDGKT is available at Aetrix Electronics and suitable for 48-V rack servers, macro remote radio units, and active antenna systems requiring stable component supply across multi-year production cycles.

Supply support for INA2290A2IDGKT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning and power management ICs.

The INA2290A2IDGKT belongs to TI's INAx290 family of ultra-precise current-sense amplifiers, engineered specifically for high-side, high-voltage current monitoring in next-generation telecom infrastructure and high-efficiency data center power systems.

FAQ

What is the maximum common-mode voltage the INA2290A2IDGKT can withstand during normal operation?

The INA2290A2IDGKT supports a continuous common-mode input voltage range of 2.7 V to 120 V during normal operation. Its survival rating extends to −20 V to +122 V, allowing robust operation during transient overvoltage events such as load dumps in telecom power distribution networks. This makes the INA2290A2IDGKT especially suitable for demanding 48-V and 120-V applications where rail integrity must be maintained under fault conditions.

Does the INA2290A2IDGKT support bidirectional current sensing?

No, the INA2290A2IDGKT is designed exclusively for unidirectional, high-side current sensing. Its internal architecture and specified common-mode range assume current flow from IN+ to IN−, and it does not support negative V_SENSE operation. For bidirectional applications, alternative devices such as the INA226 or INA240 series must be considered. The INA2290A2IDGKT remains optimal for telecom and server power rails where current direction is inherently fixed.

What is the output voltage swing capability of the INA2290A2IDGKT at 5-V supply?

At a 5-V supply, the INA2290A2IDGKT delivers a minimum output swing of GND + 5 mV to VS − 70 mV under 10-kΩ load conditions across −40°C to +125°C. This rail-to-rail output capability ensures full utilization of ADC input ranges without level-shifting circuitry. The precise swing margins are validated per Electrical Characteristics Table 6.5 and remain stable across temperature and supply variations, supporting consistent digitization accuracy in the INA2290A2IDGKT-based monitoring systems.

How does the gain option 'A2' in INA2290A2IDGKT map to electrical performance?

The 'A2' suffix in INA2290A2IDGKT explicitly denotes a factory-trimmed 50 V/V fixed gain configuration. This gain setting provides optimal trade-offs for 48-V systems: it allows accurate measurement of 20-mV to 400-mV shunt voltages, delivers 1.1-MHz bandwidth, and maintains ±0.1% gain error across temperature. Unlike programmable alternatives, the A2 variant eliminates external resistor matching uncertainty and ensures guaranteed performance per TI's SBOS961C datasheet specifications - directly applicable to the INA2290A2IDGKT part number.

Is thermal performance data available for the INA2290A2IDGKT in its VSSOP-8 package?

Yes, the INA2290A2IDGKT's VSSOP-8 (DGK) package has documented thermal metrics: junction-to-ambient R_θJA = 169.3°C/W, junction-to-board R_θJB = 91.3°C/W, and junction-to-case (top) R_θJC(top) = 60.1°C/W. These values assume JEDEC-standard PCB layout with 2 oz copper and thermal vias. The thermal resistance profile confirms suitability for compact, convection-cooled telecom modules where ambient temperatures reach +70°C - a key design parameter verified for the INA2290A2IDGKT in production data release SBOS961C.