Texas Instruments INA211AIDCKTG4

Overview

INA211AIDCKTG4 from Texas Instruments is a voltage-output, bidirectional current-shunt monitor with zero-drift architecture, designed for high-accuracy low- or high-side current sensing in power rails up to 26 V. It features a fixed gain of 500 V/V, ±35 µV maximum offset voltage (–40°C to +125°C), 0.5 µV/°C max offset drift, ±1% max gain error over temperature, and operates from 2.7 V to 26 V supply with only 100 µA quiescent current. It enables 10-mV full-scale shunt measurements in notebook battery management and telecom power supplies.

For engineers reviewing the INA211AIDCKTG4 datasheet, INA211AIDCKTG4 pinout, INA211AIDCKTG4 application, or INA211AIDCKTG4 equivalent, this page delivers verified technical context, SC70-6 package mapping, real-world design meaning of key specs, and two validated alternative parts - all grounded in TI's SBOS437K production data sheet.

Technical Context

The INA211AIDCKTG4 implements a zero-drift chopper-stabilized amplifier topology to achieve ultra-low input offset and near-zero thermal drift, enabling precision measurement of microvolt-level differential voltages across shunts. Its common-mode input range spans –0.1 V to 26 V (Version A), independent of supply voltage, supporting both low-side and high-side configurations without level-shifting circuitry.

It integrates matched thin-film resistors for fixed 500 V/V gain, delivers 7 kHz bandwidth at 10 pF load, and maintains >105 dB CMRR over temperature. The REF pin allows output offset adjustment from 0 V to V+, while GND-referenced operation supports single-supply systems with rail-to-rail output swing within 50 mV of V+ and 5 mV of GND.

Key Specifications

Pinout & Package

INA211AIDCKTG4 is packaged in a 6-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained PCB layouts in portable electronics and telecom modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA211AIDCKTG4, INA211AIDRGT offers superior thermal resistance but demands PCB redesign, while INA210AIDCKTG4 retains identical packaging and supply behavior but trades gain for increased shunt power loss - making INA211AIDCKTG4 optimal for 10-mV shunt, space-constrained, thermally moderate applications.

Availability

INA211AIDCKTG4 is available at Aetrix Electronics and suitable for battery management systems, telecom power supplies, USB-C PD adapters, and industrial PLC I/O modules requiring stable component supply and long-term manufacturability.

Supply support for INA211AIDCKTG4 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in precision signal conditioning.

INA211AIDCKTG4 belongs to TI's INA21x zero-drift current-shunt monitor family, engineered specifically for high-accuracy, low-power, wide common-mode current sensing in portable, telecom, and industrial power systems.

FAQ

What is the maximum common-mode voltage supported by the INA211AIDCKTG4?

The INA211AIDCKTG4 supports a common-mode input voltage range of –0.1 V to 26 V across its specified operating temperature range (–40°C to +125°C). This allows direct high-side sensing on 24-V industrial buses or low-side sensing with negative bias, without external level-shifting circuitry. The device maintains accuracy and stability throughout this range when powered from 2.7 V to 26 V.

Does the INA211AIDCKTG4 require an external reference voltage?

No, the INA211AIDCKTG4 does not require an external reference voltage to operate. Its REF pin is optional and used only to set output offset - it can be tied to GND for 0-V referenced output or to any voltage between 0 V and V+ to shift the output baseline. When left unconnected or tied to GND, the device functions fully as a standard differential output current monitor with V_OUT = 500 × (V_IN+ – V_IN−).

Can the INA211AIDCKTG4 measure bidirectional current?

Yes, the INA211AIDCKTG4 is explicitly designed for bidirectional current measurement. When the shunt is placed between supply and load, polarity of V_IN+ – V_IN− determines output sign: positive difference yields positive output voltage; negative difference yields output below the REF voltage. With REF tied to mid-supply (e.g., V+/2), the output swings symmetrically above and below that point - enabling full-range sensing of charge and discharge currents.

What is the purpose of the dual IN+ and IN− pins on UQFN variants, and does INA211AIDCKTG4 have them?

UQFN-packaged variants like INA211AIDRGT provide two physically separate IN+ and two IN− pins to reduce parasitic impedance and improve high-frequency CMRR - these pins are internally bonded and must be tied together externally. The INA211AIDCKTG4 uses the SC70-6 package, which has only one IN+ and one IN− pin (pins 4 and 5), so no internal bonding or external tieing is required. Its pinout is fully defined in Figure 4-1 of TI's SBOS437K datasheet.

How does the gain error specification of ±1% affect system accuracy in a typical 10-mV shunt application?

In a 10-mV full-scale shunt application, the ±1% gain error of the INA211AIDCKTG4 contributes ±0.1-mV uncertainty to the sensed differential voltage - equivalent to ±0.1% of full scale. Combined with ±35 µV offset error, total worst-case error remains under ±0.45% of reading at room temperature, and stays within ±0.7% across –40°C to +125°C per TI's production characterization data in SBOS437K.