Texas Instruments INA183A2IDBVT

Overview

INA183A2IDBVT from Texas Instruments is a high-precision, zero-drift current-sense amplifier optimized for unidirectional high-side sensing in 2.7-V to 26-V power rails. It delivers 100 V/V fixed gain, ±170 μV maximum offset voltage, 0.5 μV/°C max offset drift, 0.4% max gain error over temperature, and operates with only 130 μA quiescent current drawn from the IN+ pin. It enables accurate 10-mV full-scale shunt-based current measurement in server power delivery subsystems.

For engineers reviewing the INA183A2IDBVT datasheet, INA183A2IDBVT pinout, INA183A2IDBVT application, or INA183A2IDBVT equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional and application-level differences.

Technical Context

The INA183A2IDBVT uses a zero-drift chopper-stabilized architecture to achieve ±170 μV offset and 0.5 μV/°C drift across –40°C to +125°C. Its single-supply operation draws power directly from the IN+ pin (2.7 V to 26 V), eliminating need for auxiliary supplies.

It implements a precision resistor-ratio gain network (R1/R2 = 100) with tight internal matching, yielding 10-ppm/°C gain drift and ±0.4% total gain error over temperature. The device is strictly unidirectional and high-side only - it cannot measure bidirectional or low-side current, and its IN– input must be connected to the load side of the shunt.

Key Specifications

Pinout & Package

INA183A2IDBVT is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, with exposed pad not electrically connected. Thermal resistance R_θJA is 164.2°C/W, requiring minimal PCB copper for typical 130-μA power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A2IDR and MAX40056ATA+T, the INA183A2IDBVT uniquely balances ultra-low drift (0.5 μV/°C), micropower operation (130 μA), and compact SOT-23 packaging - making it optimal for thermally constrained, always-on server and telecom current monitoring where long-term stability outweighs bidirectional capability or sub-50-μV initial offset.

Availability

INA183A2IDBVT is available at Aetrix Electronics and suitable for server power subsystems, industrial 24-V power supplies, and telecom rectifier modules requiring stable component supply, long-lifecycle support, and traceable sourcing for production programs.

Supply support for INA183A2IDBVT 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 delivering analog and embedded processing solutions, with deep expertise in precision signal chain and power management technologies.

The INA183 family was designed specifically for high-accuracy, high-common-mode, unidirectional current sensing in space-constrained power systems - targeting server, telecom, and industrial applications where zero-drift stability and micropower operation are mandatory.

FAQ

What is the maximum common-mode voltage the INA183A2IDBVT can handle?

The INA183A2IDBVT supports a common-mode input range of 2.7 V to 26 V. This means the voltage at the IN+ pin - which also serves as the device's power source - may be as high as 26 V, enabling direct sensing on 12-V server rails and 24-V industrial buses without external level-shifting circuitry. The IN– pin withstands the same voltage range even when the device is unpowered.

Does the INA183A2IDBVT require an external power supply?

No, the INA183A2IDBVT does not require an external power supply. It draws all operating current (≤130 μA) directly from the IN+ pin, which must be biased between 2.7 V and 26 V. This eliminates the need for auxiliary regulators or isolated supplies, simplifying design in high-voltage monitoring applications such as server VRMs and telecom rectifiers where only the main rail is accessible.

Can the INA183A2IDBVT measure bidirectional current?

No, the INA183A2IDBVT is designed exclusively for unidirectional, high-side current sensing. Its architecture and pin configuration do not support bidirectional operation or low-side sensing. It outputs a positive voltage proportional to current flowing from IN+ to IN– (i.e., from supply to load). For bidirectional applications, consider alternatives like the INA240A2IDR, which explicitly supports both directions and extended common-mode range.

What is the output voltage swing limitation of the INA183A2IDBVT?

The INA183A2IDBVT output swings from (GND + 0.005 V) to (V_IN+ − 0.05 V) under load (10 kΩ to GND), across –40°C to +125°C. For example, with IN+ at 12 V, the usable output range is approximately 5 mV to 11.95 V. This rail-to-rail–like behavior ensures compatibility with most 12-bit and 16-bit ADCs without additional level-shifting, provided the shunt and gain are selected to keep output within these bounds.

How does the zero-drift architecture improve long-term accuracy in the INA183A2IDBVT?

The zero-drift (chopper-stabilized) architecture in the INA183A2IDBVT actively cancels input offset voltage and its temperature-induced drift, achieving ±170 μV max offset and only 0.5 μV/°C max drift over –40°C to +125°C. This eliminates the need for periodic hardware calibration and ensures consistent 10-mV full-scale shunt measurements across thermal cycles - a critical advantage in server and telecom equipment where field reliability and maintenance-free operation are required.