Texas Instruments INA201AIDGKTG4

Overview

INA201AIDGKTG4 from Texas Instruments is a high-side current-shunt monitor IC with integrated open-drain comparator and 0.6-V internal reference, designed for overcurrent detection in power rails operating from –16 V to +80 V common-mode voltage. It provides fixed 50 V/V gain, 300 kHz bandwidth, ±2% total output error over temperature, and operates from 2.7 V to 18 V supply. Used in telecom power supplies for real-time load current monitoring and fault-triggered shutdown.

For engineers reviewing the INA201AIDGKTG4 datasheet, INA201AIDGKTG4 pinout, INA201AIDGKTG4 application, or INA201AIDGKTG4 equivalent, key selection criteria include its 50 V/V gain accuracy at low VSENSE (<20 mV), latchable comparator with RESET control, and validated performance across –40°C to +125°C in VSSOP-8 packaging.

Technical Context

The INA201AIDGKTG4 implements a precision current-sense amplifier with differential inputs (VIN+, VIN–) referenced to high-side shunt placements, feeding a buffered voltage output (OUT) and a dedicated comparator stage. Its internal 0.6-V reference sets the comparator threshold, while external resistor dividers on CMPIN configure trip points for bidirectional or unidirectional overcurrent detection.

Comparator operation supports latching mode (enabled by floating or pulling RESET high) or transparent mode (RESET grounded or open), with 1.3 μs typical response time and 220–300 mV VOL under 2.35 mA sink. The device maintains 100 dB CMR at 12 V common-mode and draws ≤1800 μA quiescent current across its full operating range.

Key Specifications

Pinout & Package

VSSOP-8 package (DGK suffix), 3.00 mm × 3.00 mm body size, exposed thermal pad (not electrically connected), rated for –40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA200AIDGKT and INA202AIDGKT, the INA201AIDGKTG4 offers the optimal balance of sensitivity (50× gain), bandwidth (300 kHz), and error budget (±3.5%) for mid-range shunt applications-making it the default choice for 20–100 mV VSENSE designs in telecom and industrial power systems.

Availability

INA201AIDGKTG4 is available at Aetrix Electronics and suitable for telecom power supplies, battery management systems, and automotive load-dump protection requiring stable component supply and long-term industrial lifecycle support.

Supply support for INA201AIDGKTG4 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 INA20x family was engineered specifically for high-reliability, high-common-mode current sensing in power conversion and protection systems-emphasizing accuracy, latch control, and wide operating range over cost-optimized general-purpose amplifiers.

FAQ

What is the exact gain and bandwidth of the INA201AIDGKTG4?

The INA201AIDGKTG4 has a fixed gain of 50 V/V and a small-signal bandwidth of 300 kHz at C_LOAD = 5 pF. This bandwidth supports accurate measurement of fast current transients in switching power supplies and motor drives, while the 50× gain delivers optimal resolution for 20–100 mV shunt voltage drops. Bandwidth is verified per TI SBOS374E datasheet Figure 3.

Does the INA201AIDGKTG4 require an external reference for the comparator?

No. The INA201AIDGKTG4 integrates a precision 0.6-V internal reference for the comparator, eliminating the need for external reference ICs or resistor dividers. The comparator threshold is specified from 586 mV to 625 mV over temperature, with <8 mV hysteresis. This internal reference is shared across all INA20x variants and is factory-trimmed.

How does the RESET pin function on the INA201AIDGKTG4?

The RESET pin on the INA201AIDGKTG4 controls comparator latching behavior: grounding or leaving it open enables transparent mode (output follows input continuously); pulling it high enables latched mode (output remains asserted after trip until RESET is pulsed low). An internal 2-MΩ pull-down ensures defined startup state. Minimum RESET pulse width is 1.5 μs.

What package type and thermal characteristics apply to the INA201AIDGKTG4?

The INA201AIDGKTG4 uses the DGK (VSSOP-8) package: 3.00 mm × 3.00 mm body, 0.65-mm lead pitch. Its junction-to-ambient thermal resistance (θ_JA) is 162.2°C/W on standard JEDEC 2S2P board. The exposed pad is not electrically connected but may be thermally anchored to improve dissipation in high-power-density layouts.

Can the INA201AIDGKTG4 operate with negative common-mode voltages?

Yes. The INA201AIDGKTG4 supports common-mode input voltages from –16 V to +80 V, enabling use in systems with negative supply rails (e.g., automotive cold-crank scenarios or dual-supply instrumentation). At –16 V ≤ V_CM < 0 V, output voltage is guaranteed ≥300 mV, preserving comparator functionality even under reverse-bias conditions.