Texas Instruments INA212CIDCKR

Overview

INA212CIDCKR 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 1000 V/V, ±35 µV maximum offset voltage (Version C), 0.5 µV/°C max offset drift, ±0.5% max gain error over temperature, and operates from 2.7 V to 26 V supply with ≤100 µA quiescent current. It enables 10-mV full-scale shunt measurements in notebook battery management and telecom power supplies.

For engineers reviewing the INA212CIDCKR datasheet, INA212CIDCKR pinout, INA212CIDCKR application, or INA212CIDCKR equivalent, this page delivers verified specifications, SC70-6 package layout, real-world use cases in precision power monitoring, and validated alternative parts - all grounded in TI's SBOS437K production data sheet.

Technical Context

The INA212CIDCKR implements a zero-drift chopper-stabilized amplifier topology to achieve ultra-low input offset and near-zero thermal drift. Its differential input stage supports common-mode voltages from –0.1 V to 26 V independent of supply voltage, enabling direct sensing on high-voltage rails while powered from low-voltage logic supplies.

With a 1000 V/V fixed gain, it converts small shunt voltage drops (e.g., ±10 mV) into robust 0–10 V output swings referenced to an externally supplied REF pin. The device uses internal matched resistors (R3 = R4 = 1 kΩ) and draws only 65–100 µA, making it suitable for always-on current monitoring in space-constrained portable and telecom systems.

Key Specifications

Pinout & Package

INA212CIDCKR is packaged in a 6-pin SC70 (DCK) footprint measuring 2.00 mm × 1.25 mm, optimized for high-density PCB layouts in portable electronics. Pin assignments are validated per TI SBOS437K Figure 4-1 and Table 4-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA212CIDCKR, INA213AIDCKR trades gain and offset for speed, while MAX40056ASA+ sacrifices high-voltage common-mode support for integrated reference and ultra-low supply voltage - choice depends on whether precision at 26 V, bandwidth, or sub-3-V operation dominates the design.

Availability

INA212CIDCKR is available at Aetrix Electronics and suitable for server power supplies, USB-C PD adapters, laptop battery management, and industrial PLC analog input modules requiring stable component supply across extended temperature and long product lifecycles.

Supply support for INA212CIDCKR 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 family was engineered specifically for high-accuracy, low-drift current sensing in energy-critical systems - targeting applications where shunt-based measurement must replace Hall-effect sensors for cost, size, and DC accuracy reasons.

FAQ

What is the maximum common-mode voltage supported by the INA212CIDCKR?

The INA212CIDCKR supports a common-mode input voltage range of –0.1 V to 26 V across its full operating temperature range (–40°C to +125°C). This specification applies to Version C devices per TI SBOS437K Section 5.5, enabling direct high-side sensing on 24-V industrial rails or 19-V laptop adapters without external level-shifting circuitry. The device maintains specified accuracy within this range when powered from 2.7 V to 26 V.

Does the INA212CIDCKR require an external reference voltage?

Yes, the INA212CIDCKR requires an external reference voltage applied to the REF pin to set its output common-mode level. The REF pin accepts any voltage from GND to V+, allowing unipolar (REF = GND) or bipolar (REF = V+/2) operation. TI recommends using a low-noise, buffered reference - resistive dividers without buffering degrade CMRR due to impedance mismatch at the REF node, as detailed in SBOS437K Section 6.4.3.

What is the typical bandwidth and slew rate of the INA212CIDCKR?

The INA212CIDCKR has a typical small-signal bandwidth of 4 kHz (at C_LOAD = 10 pF) and a slew rate of 0.4 V/µs, per TI SBOS437K Section 5.5. These values reflect its optimization for precision DC and low-frequency current monitoring (e.g., battery charge/discharge profiling), not high-speed transient capture. Bandwidth decreases with capacitive loading; keep output traces short and avoid >100 pF total capacitance to maintain stability.

Can the INA212CIDCKR perform bidirectional current sensing?

Yes, the INA212CIDCKR supports true bidirectional current sensing by configuring the REF pin voltage. When REF is set to mid-supply (e.g., V+/2), the output swings symmetrically around that voltage - positive current yields OUT > REF, negative current yields OUT < REF. This enables single-device charge/discharge monitoring in battery systems, as confirmed in SBOS437K Section 6.4.2 and Figure 6-4.

What package type and dimensions does the INA212CIDCKR use?

The INA212CIDCKR uses the SC70-6 (DCK) package: a 6-pin surface-mount outline measuring 2.00 mm × 1.25 mm with 0.65-mm lead pitch. This compact footprint is validated in TI's SBOS437K Section 12 and Figure 4-1. It is distinct from the 10-pin UQFN (RSW) variant - DCK is the only package offered for the INA212C grade, ensuring consistent thermal performance (θ_JA = 227.3°C/W) and layout compatibility.