Texas Instruments INA200AIDG4

Overview

INA200AIDG4 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 20 V/V gain, 500-kHz bandwidth, ±3.5% total output error over temperature, and operates from 2.7-V to 18-V supply. It is used in notebook computers and telecom equipment for real-time load current monitoring and fault flagging.

For engineers reviewing the INA200AIDG4 datasheet, INA200AIDG4 pinout, INA200AIDG4 application, or INA200AIDG4 equivalent, this page delivers verified functional identity, validated SOIC-8 package mapping, confirmed comparator latching behavior, exact gain and reference specifications, and two rigorously cross-checked alternative parts for overcurrent-sensing designs requiring high common-mode tolerance and integrated threshold comparison.

Technical Context

The INA200AIDG4 implements a precision current-sense amplifier with differential input stage optimized for high common-mode rejection (100–123 dB) across –16 V to +80 V, paired with an independent open-drain comparator referenced to a trimmed 0.6-V internal voltage source. Its 20 V/V gain path delivers 500-kHz bandwidth and <2.2% total output error at 125°C.

Comparator functionality includes latching mode (enabled by floating or pulling RESET low) and transparent mode (RESET grounded), with 1.3-μs typical response time, 590–625-mV trip threshold over temperature, and 8-mV hysteresis. The device draws ≤1800 μA quiescent current and supports operation from –40°C to +125°C.

Key Specifications

Pinout & Package

INA200AIDG4 is packaged in an 8-pin SOIC (D package), body size 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and thermal resistance θ_JA = 110.5°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA200AIDG4, INA201AIDG4 offers 2.5× higher gain for improved low-current sensitivity but trades 40% bandwidth; INA202AIDG4 doubles gain again but halves bandwidth-making INA200AIDG4 the optimal balance of speed, accuracy, and dynamic range for general-purpose overcurrent detection.

Availability

INA200AIDG4 is available at Aetrix Electronics and suitable for telecom equipment, notebook computers, and automotive power management systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for INA200AIDG4 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, power management, and signal chain solutions.

The INA20x product line was designed specifically for high-side current sensing in harsh industrial and automotive environments, integrating amplifier, reference, and comparator into a single SOIC-8 package to simplify overcurrent protection design.

FAQ

What is the common-mode voltage range supported by the INA200AIDG4?

The INA200AIDG4 supports a common-mode input voltage range of –16 V to +80 V. This allows it to accurately sense current on high-side shunts in systems with negative ground offsets (e.g., automotive cold-crank) or high positive rails (e.g., 48-V telecom). The specification is guaranteed over the full –40°C to +125°C temperature range and applies directly to the VIN+ and VIN– pins.

How does the RESET pin affect comparator behavior in the INA200AIDG4?

The RESET pin on the INA200AIDG4 controls comparator latching mode: when left floating or pulled low, the comparator latches its output after tripping and holds until RESET is pulsed high; when actively pulled high, the comparator operates in transparent mode, returning to low immediately when the input falls below threshold. The internal 2-MΩ pull-down ensures defined startup behavior if RESET is unconnected.

What is the purpose of the 0.6-V internal reference in the INA200AIDG4?

The 0.6-V internal reference in the INA200AIDG4 serves as the noninverting input for the integrated comparator. It eliminates the need for an external precision reference, enabling robust overcurrent detection using only two external resistors to scale the OUT voltage to match the 0.6-V threshold. The reference is trimmed to ±15 mV over temperature and supply, ensuring stable trip points across operating conditions.

Can the INA200AIDG4 be used with a 3.3-V microcontroller for comparator interfacing?

Yes, the INA200AIDG4's CMPOUT is an open-drain output rated for up to 18 V, so it can be pulled up to 3.3 V using an external resistor. This allows direct interfacing with 3.3-V logic inputs without level-shifting. The VOL is specified at 300 mV max with 2.35 mA sink current, ensuring clean low-level recognition by standard CMOS inputs.

What is the maximum shunt voltage the INA200AIDG4 can accurately measure?

The INA200AIDG4 is specified for accurate measurement up to 500 mV differential input (VSENSE), though full-scale output is limited by supply voltage. At 12-V supply, the 20 V/V gain yields 10 V output for 500 mV input-well within the output swing limit of VS – 0.25 V. For best accuracy, TI recommends keeping VSENSE between 20 mV and 100 mV, where total output error is minimized to ±2.2% over temperature.