Texas Instruments INA199C1DCKT

Overview

INA199C1DCKT 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 ±150 μV maximum offset voltage, 100 V/V fixed gain, ±1% max gain error over temperature, 2.7–26 V supply range, and operates across –40°C to +125°C - enabling precise 10-mV full-scale shunt measurements in notebook power rails and wireless charging transmitters.

For engineers reviewing the INA199C1DCKT datasheet, INA199C1DCKT pinout, INA199C1DCKT application, or INA199C1DCKT equivalent, this page delivers verified specifications, SC70-6 package layout, real-world use cases in battery management and telecom power systems, and validated alternative parts with documented functional trade-offs.

Technical Context

The INA199C1DCKT implements a zero-drift chopper-stabilized amplifier architecture to achieve 0.5 μV/°C max offset drift and 10 ppm/°C max gain drift, supporting stable current measurement under thermal stress. Its differential input stage accepts common-mode voltages from –0.1 V to 26 V - independent of supply - while maintaining 100 dB min CMRR across temperature.

It uses internal precision resistor networks (R1 = R2 = 1 MΩ, R3 = R4 = 10 kΩ) to set its fixed 100 V/V gain, eliminating external gain-setting components. The REF pin supports user-defined output offset (0 V to V+), enabling bidirectional current sensing with single-supply ADCs.

Key Specifications

Pinout & Package

INA199C1DCKT is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm), optimized for space-constrained portable electronics. Pin functions are validated per TI SBOS469H Rev. H (Oct. 2023).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA199C1DCKT, INA210AIDCKT trades common-mode range and REF programmability for slightly better offset, while MAX4005EUT+T extends voltage capability but removes bidirectional functionality - making INA199C1DCKT uniquely balanced for 24-V systems requiring direction-aware, low-drop current monitoring.

Availability

INA199C1DCKT 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 INA199C1DCKT 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-power current sensing in space- and energy-constrained applications - targeting battery management, wireless power, and industrial power supplies.

FAQ

What is the maximum common-mode voltage supported by the INA199C1DCKT?

The INA199C1DCKT 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 is confirmed in Section 6.5 of the TI SBOS469H datasheet and enables reliable high-side sensing on 24-V industrial rails without external level-shifting circuitry. The –0.1 V lower limit also permits true low-side sensing near ground potential.

Does the INA199C1DCKT support bidirectional current measurement?

Yes, the INA199C1DCKT supports bidirectional current measurement via its REF pin, which accepts an externally applied reference voltage (0 V to V+). When REF is set to mid-supply (e.g., V+/2), the OUT pin outputs a voltage centered at that reference - enabling positive and negative shunt voltage swings to represent current flow in either direction. This capability is explicitly documented in the Functional Block Diagram (Section 7.2) and Typical Application schematic (Figure 7-1) of the INA199C1DCKT datasheet.

What is the gain accuracy of the INA199C1DCKT over temperature?

The INA199C1DCKT has a maximum gain error of ±1% over the full operating temperature range (–40°C to +125°C), as specified for the "C" grade version in Section 1 (Features) and Table 6-5 of the official datasheet. This is tighter than the ±1.5% tolerance of the A and B versions. The gain drift is further limited to 10 ppm/°C max, ensuring minimal gain variation across thermal cycling in demanding environments like telecom power modules.

Can the INA199C1DCKT operate from a 3.3-V supply?

Yes, the INA199C1DCKT operates from a minimum supply voltage of 2.7 V, making it fully compatible with 3.3-V systems. At 3.3 V, its output swing remains within 50 mV of the rails (i.e., 0.05 V to 3.25 V) under 10-kΩ load conditions, as verified in Section 6.5 Electrical Characteristics. This allows direct interfacing with 3.3-V SAR or delta-sigma ADCs without level-shifting, preserving measurement fidelity in portable electronics.

What package type is used for the INA199C1DCKT?

The INA199C1DCKT uses the SC70-6 (DCK) package - a 6-pin, surface-mount, ultra-small outline package measuring 2.00 mm × 1.25 mm with 0.65-mm lead pitch. This package is explicitly listed in the Device Information table and Pin Configuration section (Figure 5-1) of the TI SBOS469H datasheet. It is distinct from the 10-pin UQFN (RSW) variant and optimized for high-density portable applications.