Texas Instruments INA210BIDCKR

Overview

INA210BIDCKR 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 200 V/V fixed gain, ±35 µV maximum offset voltage (enabling 10-mV full-scale shunt drops), –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 is used in notebook battery protection circuits to detect overcurrent events with sub-millivolt precision.

For engineers reviewing the INA210BIDCKR datasheet, INA210BIDCKR pinout, INA210BIDCKR application, or INA210BIDCKR equivalent, this page delivers verified specifications, SC70-6 package terminal mapping, real-world use cases in portable power systems, and two validated alternative parts with documented functional and application-level differences.

Technical Context

The INA210BIDCKR implements a zero-drift chopper-stabilized amplifier architecture to achieve ±35 µV max offset and 0.5 µV/°C max drift over –40°C to +125°C, enabling accurate measurement of low shunt voltage drops. Its differential input stage supports common-mode voltages up to 26 V independent of supply voltage - critical for high-side monitoring in 12-V or 24-V rails.

It uses a fixed 200 V/V gain topology with 14 kHz bandwidth (C_L = 10 pF) and 0.4 V/µs slew rate, delivering rail-to-rail output swing (to within 50 mV of V+ and 5 mV of GND at 10-kΩ load). Input bias current remains below 35 µA across its full common-mode range, minimizing error in high-impedance shunt configurations.

Key Specifications

Pinout & Package

INA210BIDCKR is packaged in a 6-pin SC70 (DCK) package with 2.00 mm × 1.25 mm body size and 0.65-mm lead pitch. The package is moisture-sensitive level 1 (MSL-1) and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA210AIDCKR, INA210BIDCKR provides tighter gain accuracy (±0.5% vs. ±1%) critical for uncalibrated battery fuel gauging; compared with INA240A1EDRGT, it trades bandwidth and voltage range for ultra-low power and minimal PCB area - making it optimal for portable power monitoring where space and battery life dominate.

Availability

INA210BIDCKR is available at Aetrix Electronics and suitable for notebook battery protection, USB-C PD port control, and telecom power shelf monitoring requiring stable component supply across multi-year production cycles.

Supply support for INA210BIDCKR 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 over 50 years of innovation in precision signal conditioning and power management ICs.

The INA21x series was designed specifically for high-accuracy, low-power current sensing in portable, telecom, and industrial power systems - emphasizing zero-drift stability, wide common-mode operation, and compact packaging.

FAQ

What is the maximum common-mode voltage the INA210BIDCKR can measure?

The INA210BIDCKR supports a common-mode input voltage range of –0.3 V to 26 V, independent of its supply voltage. This allows it to accurately sense current on high-side rails up to 26 V - such as 12-V or 24-V power buses - while operating from a lower supply like 3.3 V or 5 V. Version B (denoted by 'B' in INA210BIDCKR) specifies –0.1 V minimum common-mode, confirmed in TI's SBOS437K datasheet Section 5.5.

Does the INA210BIDCKR require external resistors to set gain?

No. The INA210BIDCKR has a factory-trimmed fixed gain of 200 V/V and requires no external gain-setting resistors. Its internal laser-trimmed thin-film resistors provide ±0.5% max gain error over temperature, eliminating layout sensitivity and thermal drift associated with discrete resistor networks. This is explicitly stated in the "Choice of Gains" section of the datasheet and confirmed in Table 5-5 under "Gain" parameter.

Can the INA210BIDCKR be used for bidirectional current sensing?

Yes. The INA210BIDCKR supports bidirectional current measurement when the REF pin is biased to mid-supply (e.g., VS/2); output swings above and below REF correspond to current flow direction. Its symmetric input architecture and rail-to-rail output (within 50 mV of V+ and 5 mV of GND) enable full-scale negative and positive shunt voltage detection - a key feature highlighted in the device description and Figure 6-4 of the datasheet.

What is the purpose of the REF pin on the INA210BIDCKR?

The REF pin sets the output voltage common-mode level. When grounded, the output is unipolar (0 V to V+–0.05 V); when tied to VS/2, it becomes bipolar (VS/2 ± full-scale range), enabling bidirectional current sensing. Its high-impedance input (>1 GΩ) means external impedance must be minimized - TI recommends buffering resistive dividers with an op amp to preserve CMRR, as detailed in Section 6.4.3 of SBOS437K.

Is the INA210BIDCKR compatible with SC70-6 PCB footprints from other manufacturers?

Yes. The INA210BIDCKR uses the industry-standard SC70-6 (DCK) package with 2.00 mm × 1.25 mm body and 0.65-mm pitch, fully compliant with JEDEC MO-203-DA. Footprint dimensions, solder paste stencil recommendations, and thermal pad layout match standard SC70-6 land patterns - verified in TI's Mechanical Drawing SLAS722 and Package Thermal Metrics report.