Texas Instruments INA190A1IDCKR

Overview

INA190A1IDCKR from Texas Instruments is a bidirectional, zero-drift, precision current-sense amplifier optimized for microamp-level sensing in low-power systems. It features 25 V/V fixed gain, ±15 µV max offset voltage, 132 dB min CMRR, and operates from 1.7 V to 5.5 V supply across –0.2 V to +40 V common-mode range - enabling accurate high-side or low-side current monitoring in battery-powered consumer electronics.

For engineers reviewing the INA190A1IDCKR datasheet, INA190A1IDCKR pinout, INA190A1IDCKR application, or INA190A1IDCKR equivalent, this page delivers verified specifications, SC70-6 package terminal mapping, real-world use cases in notebook PC power management and smartphone battery charging, and two validated alternative parts with documented functional and application differences.

Technical Context

The INA190A1IDCKR employs a capacitively coupled front-end architecture to achieve ultra-low input bias current (0.5 nA typ) and high common-mode rejection (132 dB min), decoupling input stage operation from supply rail limitations. Its zero-drift design ensures stable offset performance (80 nV/°C max drift) over –40°C to +125°C, critical for long-term accuracy in embedded power monitoring.

This device supports bidirectional sensing via external REF pin biasing and delivers rail-to-rail output swing (GND +1 mV / VS –40 mV) at 35 kHz bandwidth (A1 gain variant), with shutdown current below 100 nA - making it suitable for intermittent measurement in energy-constrained applications.

Key Specifications

Pinout & Package

INA190A1IDCKR is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for space-constrained portable designs. The ENABLE pin is not available in this package variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA219BIDR and MAX4008BAUT+T, the INA190A1IDCKR provides superior dc accuracy (±0.2% gain error vs ±0.3% and ±1%), wider common-mode range (–0.2 V to +40 V vs +0.5 V to +26 V and –0.1 V to +28 V), and analog output flexibility - making it optimal for high-fidelity analog power monitoring in portable and server-class systems.

Availability

INA190A1IDCKR is available at Aetrix Electronics and suitable for smartphone battery charging, notebook PC power management, and merchant server PSU monitoring requiring stable component supply across extended production lifecycles.

Supply support for INA190A1IDCKR 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 specializing in analog and embedded processing technologies, with leadership in precision signal conditioning and power management ICs.

The INA190 product line was designed for high-accuracy, low-power current sensing in battery-powered and energy-efficient systems - targeting applications where microamp-level resolution, wide common-mode tolerance, and minimal supply current are critical.

FAQ

What is the maximum common-mode voltage supported by the INA190A1IDCKR?

The INA190A1IDCKR supports a common-mode input voltage range of –0.2 V to +40 V, independent of its 1.7 V to 5.5 V supply voltage. This allows high-side sensing on 36-V bus rails while operating from a low-voltage microcontroller supply. The specification is guaranteed across the full –40°C to +125°C temperature range and applies directly to the INA190A1IDCKR in SC70-6 packaging.

Does the INA190A1IDCKR have an enable pin?

No, the INA190A1IDCKR does not include an ENABLE pin. That feature is only available in the DDF (SOT-23-8) and RSW (UQFN-10) package variants of the INA190 family. The SC70-6 package (DCK) used for INA190A1IDCKR omits ENABLE, so the device remains continuously active when powered - requiring external power gating if ultra-low standby current is needed.

What is the typical input bias current of the INA190A1IDCKR and why does it matter?

The INA190A1IDCKR has a typical input bias current of 0.5 nA. This ultra-low value enables accurate measurement of currents down to the microamp range using high-value sense resistors, minimizes error from shunt self-heating, and allows robust RC filtering at the inputs without degrading accuracy - a key advantage over conventional current-sense amplifiers with bias currents in the tens of nanoamps.

Can the INA190A1IDCKR perform bidirectional current sensing?

Yes, the INA190A1IDCKR supports bidirectional current sensing through its REF pin. By applying a mid-supply voltage (e.g., VS/2) to REF, the output swings above or below that reference depending on current direction. For example, with VS = 3.3 V and REF = 1.65 V, positive current yields OUT > 1.65 V and negative current yields OUT < 1.65 V - enabling full-scale analog representation of reversible load currents in the INA190A1IDCKR.

What is the gain error specification for the INA190A1IDCKR and how is it tested?

The INA190A1IDCKR has a maximum gain error of ±0.2% under recommended operating conditions (TA = –40°C to +125°C, VOUT = 0.1 V to VS – 0.1 V). This is measured as the deviation between actual and ideal transfer function (VOUT = 25 × (IN+ − IN−) + VREF) across full temperature and supply ranges, and is guaranteed by Texas Instruments' production test flow - ensuring consistent performance in production-grade INA190A1IDCKR units.