Texas Instruments INA199C2DCKR

Overview

INA199C2DCKR from Texas Instruments is a bidirectional, zero-drift current-shunt monitor optimized for high-accuracy, low-power current sensing in both high-side and low-side configurations. It features 100 V/V fixed gain, ±150 μV max offset voltage, 0.5 μV/°C max offset drift, –0.1 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 10-mV full-scale shunt measurements in notebook power rails and Qi wireless charging transmitters.

For engineers reviewing the INA199C2DCKR datasheet, INA199C2DCKR pinout, INA199C2DCKR application, or INA199C2DCKR equivalent, this page delivers verified specifications, SC70-6 package details, real-world use scenarios, and validated alternative options - all grounded in TI's SBOS469H production data sheet and official package documentation.

Technical Context

The INA199C2DCKR implements a zero-drift chopper-stabilized architecture to achieve ultra-low offset and drift, enabling precise measurement of small differential voltages across shunt resistors at extreme common-mode potentials. Its internal matched resistor network (R1/R2 = 1 MΩ, R3/R4 = 10 kΩ) sets the 100 V/V gain without external components.

It supports bidirectional sensing via reference voltage control on the REF pin (0 V to V+), maintains >100 dB CMRR over temperature, and delivers 30 kHz bandwidth with 0.4 V/μs slew rate - sufficient for fast transient detection in battery charger feedback loops and telecom power management systems.

Key Specifications

Pinout & Package

INA199C2DCKR is packaged in a 6-pin SC70 (DCK) with 2.00 mm × 1.25 mm body size and 0.65 mm pitch. This space-constrained package supports high-density PCB layouts in portable electronics and compact power modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA219BIDR and MAX4005EUT+T, the INA199C2DCKR uniquely combines 26-V common-mode operation, ±1% gain error over –40°C to +125°C, and 100-μA quiescent current in SC70-6 - making it the only option for high-accuracy, low-power, wide-rail analog current sensing in portable and industrial power systems.

Availability

INA199C2DCKR is available at Aetrix Electronics and suitable for notebook computers, Qi-compliant wireless charging transmitters, and telecom equipment requiring stable component supply across extended temperature and voltage ranges.

Supply support for INA199C2DCKR 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 INA199 product line was designed specifically for high-accuracy, low-drift current sensing in space- and power-constrained applications - targeting battery management, wireless charging, and industrial power supplies where shunt-based measurement fidelity is critical.

FAQ

What is the maximum common-mode voltage supported by the INA199C2DCKR?

The INA199C2DCKR supports a common-mode input voltage range of –0.1 V to 26 V over its full operating temperature range (–40°C to +125°C). This specification applies specifically to the C-grade version (INA199Cx) and enables reliable high-side sensing on 24-V industrial rails and low-side sensing near ground potential without level-shifting circuitry. The –0.1 V lower limit allows true ground-referenced operation in low-side configurations.

Does the INA199C2DCKR require external gain-setting resistors?

No, the INA199C2DCKR does not require external gain-setting resistors. It integrates precision internal thin-film resistors (R1/R2 = 1 MΩ, R3/R4 = 10 kΩ) to deliver a fixed 100 V/V gain. This eliminates resistor matching errors, board space, and thermal drift concerns associated with discrete gain networks - ensuring consistent performance across manufacturing lots and temperature gradients in the final application.

Can the INA199C2DCKR measure bidirectional current, and how is that configured?

Yes, the INA199C2DCKR supports bidirectional current measurement by biasing the REF pin to a defined voltage between 0 V and V+. When REF is set to V+/2 (e.g., 1.65 V on a 3.3-V supply), the output centers at that voltage: positive shunt voltage produces output above REF, negative shunt voltage produces output below REF. This configuration is used in battery charge/discharge monitoring and Qi wireless charging FOD detection - and is explicitly validated for INA199C2DCKR in TI's SBOS469H datasheet.

What is the typical bandwidth and slew rate of the INA199C2DCKR?

The INA199C2DCKR has a typical small-signal bandwidth of 30 kHz and a slew rate of 0.4 V/μs, measured under standard conditions (C_LOAD = 10 pF, V_S = 5 V). These values are confirmed for the 100 V/V gain version (INA199x2) in the Electrical Characteristics table of the SBOS469H datasheet. This performance supports accurate capture of switching ripple and fault transients in DC-DC converters and battery charger control loops.

Is the INA199C2DCKR compatible with SC70-6 PCB footprints from other manufacturers?

Yes, the INA199C2DCKR uses the industry-standard SC70-6 (DCK) package with 2.00 mm × 1.25 mm body dimensions and 0.65 mm pin pitch, fully compliant with JEDEC MO-203-DA. Its pinout (REF-GND-V+-IN+-IN−-OUT) matches the generic SC70-6 mechanical outline, enabling drop-in replacement in existing layouts designed for functionally similar SC70-6 current-sense amplifiers - provided electrical specifications (gain, CMVR, offset) meet system requirements.