Texas Instruments INA211AIDCKRG4

Overview

INA211AIDCKRG4 from Texas Instruments is a zero-drift, voltage-output current-shunt monitor optimized for bidirectional high- or low-side sensing in power management systems. It features 500 V/V fixed gain, ±35 µV max offset voltage, 0.5 µV/°C max offset drift, and operates from 2.7 V to 26 V supply across –40°C to +125°C - enabling precise 10-mV full-scale shunt measurements in battery chargers and telecom power rails.

For engineers reviewing the INA211AIDCKRG4 datasheet, INA211AIDCKRG4 pinout, INA211AIDCKRG4 application, or INA211AIDCKRG4 equivalent, this page delivers verified specifications, SC70-6 package layout, real-world use cases in notebook power monitoring and USB-C PD systems, and two validated alternative parts with documented functional differences.

Technical Context

The INA211AIDCKRG4 implements a precision zero-drift chopper-stabilized amplifier architecture to reject input offset drift over temperature and supply variation. Its differential input stage supports common-mode voltages from –0.3 V to 26 V independent of supply voltage, enabling direct sensing on 12-V or 24-V rails while powered from 3.3 V or 5 V.

It integrates matched thin-film resistors for 500 V/V gain accuracy (±1% max over temperature), achieves 105 dB min CMRR, and delivers 7 kHz bandwidth with 0.4 V/µs slew rate - all while drawing ≤100 µA quiescent current. The REF pin allows output level shifting for single-supply ADC interfacing without external level translation.

Key Specifications

Pinout & Package

INA211AIDCKRG4 is packaged in a 6-pin SC70 (DCK) with 2.00 mm × 1.25 mm body size and 0.65 mm pitch. Pin 1 is marked by a dot; pins are arranged in single-row configuration with GND adjacent to IN– for optimal noise immunity in shunt layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA212AIDCKR and MAX4005EUT+T, the INA211AIDCKRG4 delivers optimal balance of sensitivity (500 V/V), precision (±35 µV), and package compatibility for space-constrained 12-V/24-V power monitoring - making it the preferred choice for USB-C PD, telecom, and server PSU designs requiring 10-mV shunt compliance.

Availability

INA211AIDCKRG4 is available at Aetrix Electronics and suitable for notebook battery protection, telecom rectifier supervision, and industrial PLC power modules requiring stable component supply, long-lifecycle assurance, and traceable sourcing.

Supply support for INA211AIDCKRG4 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 INA21x product line was designed specifically for high-accuracy, low-power current sensing in energy-efficient computing, telecom infrastructure, and industrial power systems - emphasizing zero-drift stability, wide common-mode operation, and SC70/UQFN miniaturization.

FAQ

What is the maximum common-mode voltage the INA211AIDCKRG4 can measure?

The INA211AIDCKRG4 supports a common-mode input voltage range of –0.3 V to 26 V across its full operating temperature range (–40°C to +125°C). This allows direct high-side sensing on 24-V rails without external level-shifting circuitry. The specification applies to both IN+ and IN– pins simultaneously and is independent of the 2.7-V to 26-V supply voltage applied to V+.

Does the INA211AIDCKRG4 require external resistors to set gain?

No. The INA211AIDCKRG4 has a factory-trimmed fixed gain of 500 V/V. Unlike programmable current-sense amplifiers, it contains internal precision thin-film resistors that define the gain ratio - eliminating external resistor selection, layout sensitivity, and matching errors. Gain error remains within ±1% over temperature without user adjustment.

Can the INA211AIDCKRG4 be used for bidirectional current sensing?

Yes. The INA211AIDCKRG4 outputs a voltage proportional to (V_IN+ – V_IN–) × 500 + V_REF. When V_REF is set to mid-supply (e.g., 2.5 V on 5-V rail), positive shunt current yields output above V_REF, and negative current yields output below V_REF. This enables true bidirectional measurement in battery charge/discharge monitoring and motor control applications.

What is the purpose of the REF pin on the INA211AIDCKRG4?

The REF pin sets the output voltage's DC offset level. By connecting REF to ground, the output becomes single-ended with 0 V representing zero current. Connecting REF to an external reference (e.g., 1.25 V or ADC reference) shifts the entire output range - enabling ratiometric measurement, rejection of reference noise, or compatibility with differential-input ADCs without additional op-amps.

Is the INA211AIDCKRG4 pin-compatible with other INA21x variants in SC70-6?

Yes. All INA21x devices in the DCK (SC70-6) package - including INA210, INA211, INA212, INA213, INA214, and INA215 - share identical pinout, footprint, and thermal characteristics. This allows design reuse across gain options (50–1000 V/V) without PCB changes, provided the REF connection and output loading remain compatible with the selected gain variant.