Texas Instruments INA204AIDGST

Overview

INA204AIDGST from Texas Instruments is a unidirectional current-shunt monitor IC with 50 V/V gain, dual open-drain comparators (CMP1 latched, CMP2 delay-programmable), and integrated 1.2-V reference output. It operates from 2.7 V to 18 V, supports –16 V to 80 V common-mode input range, and delivers 300 kHz bandwidth with ±2% total output error over –40°C to 125°C - used for overcurrent protection in telecom power supplies.

For engineers reviewing the INA204AIDGST datasheet, INA204AIDGST pinout, INA204AIDGST application, or INA204AIDGST equivalent, this page provides verified functional specifications, validated pin functions for the VSSOP-10 package, confirmed comparator timing behavior, and real-world implementation constraints including 0.6-V internal reference override capability and 1.2-V REF OUT load regulation limits.

Technical Context

The INA204AIDGST integrates a precision current-sense amplifier with fixed 50 V/V gain, two independent comparators sharing internal 0.6-V references (overrideable on pins 3/6 in 14-pin variants, but not present in VSSOP-10), and a buffered 1.2-V reference output. Its architecture enables direct shunt voltage measurement across high-side or low-side configurations without level-shifting circuitry.

Comparator 1 features latch-and-reset functionality via active-low CMP1 RESET; Comparator 2 offers user-programmable delay using an external capacitor on the dedicated CMP2 DELAY pin (not available in 10-pin variant). The device uses a single-supply rail and maintains accuracy under wide common-mode transients up to 80 V.

Key Specifications

Pinout & Package

VSSOP-10 package: 3.00 mm × 3.00 mm body, 0.5-mm pitch, exposed thermal pad (DGS suffix), RoHS-compliant, rated for –40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA204AIDGST, INA205AIDGST offers doubled gain for improved low-current resolution but reduced noise margin, while INA200AIDGSR sacrifices comparator redundancy and reference output to reduce size and BOM count - selection depends on required fault coverage and signal chain precision.

Availability

INA204AIDGST is available at Aetrix Electronics and suitable for telecom power supplies, automotive battery management systems, and industrial motor drives requiring stable component supply with guaranteed long-term availability.

Supply support for INA204AIDGST 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 designed specifically for high-accuracy, high-common-mode current sensing in power conversion and protection systems - targeting applications where reliability, temperature stability, and integrated fault logic are critical.

FAQ

What is the maximum common-mode voltage supported by the INA204AIDGST?

The INA204AIDGST supports a common-mode input voltage range from –16 V to +80 V. This allows direct high-side sensing in 48-V telecom systems and industrial 24-V/48-V buses without external level-shifting circuitry. Operation at the extremes requires adherence to absolute maximum ratings - sustained operation above 80 V may cause permanent damage.

Does the INA204AIDGST include a programmable delay on Comparator 2?

No - the CMP2 DELAY pin is only present in the 14-pin SOIC and TSSOP packages (e.g., INA204AIDR). The VSSOP-10 package (INA204AIDGST) does not include the CMP2 DELAY pin or associated delay circuitry. Comparator 2 in INA204AIDGST operates as a standard open-drain comparator without user-adjustable timing.

Can the internal 0.6-V reference be overridden on the INA204AIDGST?

No - the 0.6-V internal reference override capability applies only to pins 3 and 6 in the 14-pin versions (SOIC/TSSOP). The VSSOP-10 package (INA204AIDGST) has no pins designated for reference override; CMP1 IN− and CMP2 IN− are not bonded out, so the comparators use only the fixed internal 0.6-V reference.

What is the purpose of the 1.2-V reference output on the INA204AIDGST?

The 1.2-V reference output (pin 12 in 14-pin packages; not available in VSSOP-10) provides a stable, low-drift (100 ppm/°C) voltage source for biasing external comparators, ADC references, or calibration circuits. In INA204AIDGST (VSSOP-10), this pin is absent - the 1.2-V REF OUT function is exclusive to 14-pin variants.

How does the latching behavior of Comparator 1 work in the INA204AIDGST?

Comparator 1 in the INA204AIDGST features built-in latch functionality: once triggered by an overcurrent condition, CMP1 OUT remains low until actively reset via the CMP1 RESET pin. Driving CMP1 RESET low clears the latch and restores transparent comparator operation. Leaving CMP1 RESET open or high maintains latched state - essential for fault persistence in safety-critical systems.