Texas Instruments INA200AIDGKTG4

Overview

INA200AIDGKTG4 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 features 20 V/V fixed gain, 500-kHz bandwidth, ±3.5% maximum total output error over temperature, and operates from a single 2.7-V to 18-V supply drawing ≤1800 μA quiescent current. It is used in notebook battery protection circuits where precise shunt-based current sensing and latched fault signaling are required.

For engineers reviewing the INA200AIDGKTG4 datasheet, INA200AIDGKTG4 pinout, INA200AIDGKTG4 application, or INA200AIDGKTG4 equivalent, key selection considerations include its 20× gain scaling for 50–100 mV shunt drops, latchable comparator with RESET control, VSSOP-8 package thermal performance (θ_JA = 162.2°C/W), and guaranteed operation across –40°C to +125°C.

Technical Context

The INA200AIDGKTG4 implements a precision current-sense amplifier with differential input stage referenced to high-side shunt placement, enabling accurate measurement despite wide common-mode swings. Its internal 0.6-V comparator threshold is fixed and referenced to GND, with external resistor dividers setting trip points on CMPIN - allowing programmable overcurrent thresholds independent of supply voltage.

Comparator latching is controlled via the active-low RESET pin: grounding or leaving it open enables transparent mode; asserting RESET low clears the latch. The device uses an open-drain CMPOUT output capable of sinking ≥2.35 mA while maintaining VOL ≤300 mV, compatible with 2.7–18 V pull-up supplies regardless of VS.

Key Specifications

Pinout & Package

VSSOP-8 package (3.00 mm × 3.00 mm body size), thermally enhanced for surface-mount applications in space-constrained power management modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA201AIDGKT and MAX4080TASA+, the INA200AIDGKTG4 uniquely balances 20× gain, 500-kHz bandwidth, and fully integrated comparator latching in VSSOP-8 - making it optimal for space-constrained, cost-sensitive designs requiring self-contained overcurrent protection without external support components.

Availability

INA200AIDGKTG4 is available at Aetrix Electronics and suitable for battery protection circuits, telecom power shelf monitoring, automotive body control modules, and industrial motor drive overcurrent detection requiring stable component supply and long-term production continuity.

Supply support for INA200AIDGKTG4 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 analog signal chains and power management ICs.

The INA20x product line was designed specifically for high-side current sensing in power-constrained, high-reliability applications - integrating amplifier, reference, and comparator in one package to simplify overcurrent protection in computing, telecom, and automotive systems.

FAQ

What is the function of the RESET pin on the INA200AIDGKTG4?

The RESET pin on the INA200AIDGKTG4 is an active-low digital input that controls the latching behavior of the internal comparator. When held low or grounded, it resets the comparator output to a known low state; when left open or pulled high, the comparator operates in transparent mode. An internal 2-MΩ pull-down ensures defined startup behavior, and the minimum RESET pulse width is 1.5 μs. This functionality is essential for implementing reliable fault-clearing sequences in safety-critical systems using the INA200AIDGKTG4.

Can the INA200AIDGKTG4 operate with a common-mode voltage below ground?

Yes, the INA200AIDGKTG4 supports a common-mode input voltage range from –16 V to +80 V, meaning it can accurately monitor current in negative-rail applications such as dual-supply op-amp stages or automotive reverse-battery protection circuits. At –16 V ≤ V_CM < 0 V, the output remains functional with a minimum output voltage of 300 mV, and the device maintains specified accuracy and CMR performance. This capability is explicitly validated in the Electrical Characteristics table and is a defining feature of the INA200AIDGKTG4 for high-side sensing in demanding power architectures.

What is the maximum shunt voltage the INA200AIDGKTG4 can accurately measure?

The INA200AIDGKTG4 is specified for accurate measurement across a full-scale sense input voltage (V_SENSE) range up to (V_S – 0.25) / 20 V, with typical use limited to 100 mV for optimal linearity and error performance. While the absolute maximum differential input is ±18 V, the datasheet specifies guaranteed total output error ≤±3.5% only for V_SENSE ≥20 mV and within recommended operating conditions. For highest accuracy, design targets should use 50–100 mV shunt drops - directly yielding 1–2 V output signals compatible with most ADCs. This specification is confirmed in Section 6.5 of the INA200AIDGKTG4 datasheet.

How does the open-drain CMPOUT pin interface with external logic?

The CMPOUT pin on the INA200AIDGKTG4 is an open-drain output requiring an external pull-up resistor to any supply rail between 2.7 V and 18 V - independent of the device's VS supply. It can sink ≥2.35 mA while maintaining VOL ≤300 mV, making it compatible with 3.3-V, 5-V, or 12-V logic families. The output remains valid even if VS is unpowered, provided the pull-up supply is active. This flexibility simplifies integration with diverse host controllers and enables wired-OR fault bus configurations. These characteristics are documented in Section 6.6 "Electrical Characteristics: Comparator" of the INA200AIDGKTG4 datasheet.

Is the 0.6-V internal reference on the INA200AIDGKTG4 adjustable or trimmed?

No, the 0.6-V internal reference on the INA200AIDGKTG4 is fixed and factory-trimmed - it is not user-adjustable or externally programmable. Its typical value is 608 mV with ±14 mV variation over –40°C to +125°C, and it serves exclusively as the comparator threshold reference. Trip point adjustment is achieved by scaling the shunt voltage with external resistors on the CMPIN pin, not by modifying the reference itself. This architecture ensures stability and eliminates drift sources associated with external references, and the specification is verified in Table 6.6 of the official INA200AIDGKTG4 datasheet.