Texas Instruments INA190A5IDCKT

Overview

INA190A5IDCKT from Texas Instruments is a bidirectional, zero-drift, precision current-sense amplifier with 500 V/V fixed gain, ±15 µV max offset voltage, 132 dB min CMRR, and operation from 1.7 V to 5.5 V supply across –0.2 V to +40 V common-mode range. It enables microamp-level current measurement in battery-powered portable electronics using high-value sense resistors.

For engineers reviewing the INA190A5IDCKT datasheet, INA190A5IDCKT pinout, INA190A5IDCKT application, or INA190A5IDCKT equivalent, this page delivers verified specifications, SC70-6 package terminal mapping, bidirectional sensing implementation guidance, and validated alternative options for power rail monitoring in notebook PCs, smartphone chargers, and server PSUs.

Technical Context

The INA190A5IDCKT employs a capacitively coupled front-end architecture to achieve ultra-low input bias current (0.5 nA typ) and reject DC common-mode voltage transients-enabling accurate sensing at bus voltages up to +40 V independent of its 1.7–5.5 V supply. Its zero-drift design maintains <80 nV/°C offset drift over –40°C to +125°C.

This variant implements fixed 500 V/V gain with ±0.4% max gain error and 27 kHz small-signal bandwidth (C_LOAD = 10 pF). The SC70-6 package omits the ENABLE pin-unlike DDF and RSW variants-so the device operates continuously when powered.

Key Specifications

Pinout & Package

INA190A5IDCKT is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body), pin-compatible with industry-standard SC70 footprints. Unlike DDF and RSW variants, the SC70 package does not include an ENABLE pin-operation is continuous upon VS application.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA190A5IDCKT, INA210A5IDCKT trades long-term stability for lower cost, while MAX40056ASA+T sacrifices bidirectionality and ultra-low bias for higher bandwidth-neither offers drop-in replacement capability due to architectural and functional differences.

Availability

INA190A5IDCKT is available at Aetrix Electronics and suitable for notebook PC power management, smartphone battery charging, and server PSU output monitoring requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for INA190A5IDCKT 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 INA190 product line was designed specifically for high-accuracy, low-power current sensing in space-constrained portable and infrastructure equipment-emphasizing zero-drift performance, wide common-mode tolerance, and microamp-level resolution.

FAQ

What is the maximum common-mode voltage the INA190A5IDCKT can handle?

The INA190A5IDCKT supports a common-mode input range of –0.2 V to +40 V, independent of its 1.7–5.5 V supply voltage. This allows direct high-side sensing on 40 V rails such as server PSUs or industrial 24 V/48 V systems without external level-shifting circuitry. The specification is guaranteed across the full –40°C to +125°C operating temperature range, and the device maintains 132 dB minimum CMRR even at the extremes of this range. INA190A5IDCKT achieves this via its internal capacitively coupled amplifier topology, which blocks DC common-mode voltage from affecting the output stage.

Does the INA190A5IDCKT have an enable pin?

No, the INA190A5IDCKT does not have an ENABLE pin. It is packaged in the 6-pin SC70 (DCK) variant, which omits the ENABLE function entirely-unlike the 8-pin DDF (SOT-23) and 10-pin RSW (UQFN) versions of the INA190 family. As a result, INA190A5IDCKT operates continuously whenever VS is applied within 1.7–5.5 V. For applications requiring shutdown capability, TI recommends selecting INA190A5IDDFT (DDF package) instead, which provides 100 nA max quiescent current in disabled mode.

What is the typical quiescent current of the INA190A5IDCKT?

The INA190A5IDCKT draws 48 µA typical quiescent current at 25°C and 1.8 V supply, rising to 90 µA maximum across –40°C to +125°C. This low IQ enables always-on current monitoring in battery-powered devices-for example, drawing just 86 µW from a 1.8 V source. The value is measured with V_SENSE = 0 mV and excludes any external REF or bypass components. INA190A5IDCKT achieves this efficiency through optimized biasing of its zero-drift amplifier core and absence of ENABLE-related control circuitry in the SC70 package.

Can the INA190A5IDCKT measure bidirectional current?

Yes, the INA190A5IDCKT supports bidirectional current sensing via its REF pin. Applying a reference voltage-typically V_S/2-to the REF pin centers the output at mid-supply: positive differential inputs (I_LOAD flowing IN+ → IN−) raise OUT above V_REF, while negative differentials pull OUT below V_REF. With 500 V/V gain and rail-to-rail output (GND +1 mV to V_S −40 mV), INA190A5IDCKT resolves ±2 µA through a 1 Ω shunt on a 1.8 V supply. This capability is intrinsic to the device's architecture and requires no external switches or op-amps.

What is the gain error specification for the INA190A5IDCKT?

The INA190A5IDCKT has a maximum gain error of ±0.4% over temperature (–40°C to +125°C) and output voltage range (0.1 V to V_S − 0.1 V). At 25°C, the typical gain error is ±0.08%, and gain drift is limited to 7 ppm/°C maximum. This tight tolerance ensures that a 10 mV shunt voltage produces 5.00 V ±20 mV at the output-critical for achieving <0.5% end-to-end current measurement accuracy in production systems. Gain error is measured with V_SENSE applied differentially across IN+ and IN−, with V_REF = 0 V.