Texas Instruments INA212AIDCKR

Overview

INA212AIDCKR from Texas Instruments is a voltage-output, bidirectional, zero-drift current-shunt monitor optimized for high-side or low-side sensing in power management systems. It features 1000 V/V fixed gain, ±35 µV maximum offset voltage, 0.5 µV/°C max offset drift, –0.3 V to 26 V common-mode input range, and operates from 2.7 V to 26 V supply with ≤100 µA quiescent current. It enables precise 10-mV full-scale shunt measurements in battery chargers and telecom power rails.

For engineers reviewing the INA212AIDCKR datasheet, INA212AIDCKR pinout, INA212AIDCKR application, or INA212AIDCKR equivalent, this page delivers verified specifications, SC70-6 package layout, real-world use cases in notebook power monitoring and cell phone battery protection, and two validated alternative parts with documented functional and gain-related trade-offs.

Technical Context

The INA212AIDCKR implements a zero-drift chopper-stabilized amplifier architecture to achieve ultra-low offset and drift, enabling accurate current measurement at sub-10-mV shunt drops. Its differential input stage supports common-mode voltages up to 26 V - independent of supply - making it suitable for high-side sensing in 12-V and 24-V systems.

It uses a fixed 1000 V/V gain configuration with 4-kHz bandwidth (C_L = 10 pF), 105–140 dB CMRR over temperature, and rail-to-rail output swing within 50 mV of V+ and 5 mV of GND. The REF pin allows user-defined output offset, supporting unidirectional or bidirectional current sensing without external level-shifting circuitry.

Key Specifications

Pinout & Package

INA212AIDCKR is packaged in a 6-pin SC70 (DCK) package, measuring 2.00 mm × 1.25 mm, with 0.65-mm lead pitch and wettable flank capability for automated optical inspection (AOI). The package is RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA212AIDCKR, INA213AIDCKR trades gain and offset for wider full-scale range and higher bandwidth, while INA240AIDR offers superior noise immunity and speed at the cost of larger footprint and higher quiescent current - making INA212AIDCKR optimal for compact, precision, low-power portable power monitoring.

Availability

INA212AIDCKR is available at Aetrix Electronics and suitable for notebook computers, cell phone battery management, telecom power modules, and industrial embedded power monitoring requiring stable component supply and long-term production continuity.

Supply support for INA212AIDCKR 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 amplifiers and power management ICs.

The INA21x family was designed specifically for high-accuracy, low-power current sensing in space-constrained, thermally demanding applications such as portable computing and battery-powered communications equipment.

FAQ

What is the maximum common-mode voltage supported by the INA212AIDCKR?

The INA212AIDCKR supports a common-mode input voltage range of –0.3 V to 26 V across its IN+ and IN– pins, independent of supply voltage. This allows direct high-side sensing on 24-V systems without level-shifting circuitry. The specification is guaranteed over the full –40°C to +125°C operating temperature range and applies to Version A of the device, which INA212AIDCKR belongs to.

Does the INA212AIDCKR require external gain-setting resistors?

No, the INA212AIDCKR has a factory-trimmed fixed gain of 1000 V/V and requires no external resistors for gain configuration. Its internal laser-trimmed thin-film resistors ensure ±0.5% gain error over temperature, eliminating layout complexity and matching errors associated with discrete gain networks. This fixed-gain architecture is integral to the INA212AIDCKR's precision and repeatability.

Can the INA212AIDCKR measure bidirectional current flow?

Yes, the INA212AIDCKR supports bidirectional current sensing via its REF pin. By applying a reference voltage (e.g., V_S/2) to REF, the output centers at that voltage - producing positive output for current in one direction and negative relative to REF for reverse current. This capability is explicitly confirmed in the INA212AIDCKR datasheet's Functional Block Diagram and Typical Applications section.

What is the recommended bypass capacitor for the INA212AIDCKR V+ pin?

A 0.1-µF ceramic capacitor placed as close as possible to the V+ and GND pins is mandatory for stable operation of the INA212AIDCKR. The datasheet specifies this value for all operating conditions and warns that omitting or misplacing the capacitor may cause oscillation or degraded PSRR. For noisy supplies, a parallel 1-µF tantalum or ceramic capacitor is recommended - but the 0.1-µF unit remains essential for high-frequency decoupling.

Is the INA212AIDCKR pin-compatible with other INA21x variants in SC70-6 package?

Yes, all INA21x devices in the DCK (SC70-6) package - including INA210AIDCKR, INA211AIDCKR, INA212AIDCKR, INA213AIDCKR, INA214AIDCKR, and INA215AIDCKR - share identical pinout, footprint, and thermal characteristics. This allows design reuse and gain flexibility without PCB revision; only the gain and minor electrical specs differ between variants.