Texas Instruments LM2903BIDGKR

Overview

LM2903BIDGKR from Texas Instruments is a dual precision voltage comparator optimized for industrial and automotive applications, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator supply current, 1 µs propagation delay, and operation across 2 V to 36 V single-supply range with rail-to-rail input common-mode range including ground. It serves as the sensing and decision-making core in overvoltage protection circuits, motor control feedback loops, and power supply sequencing.

For engineers reviewing the LM2903BIDGKR datasheet, LM2903BIDGKR pinout, LM2903BIDGKR application, or LM2903BIDGKR equivalent, this page delivers verified electrical specifications, validated VSSOP-8 pin functions, real-world use cases in server PSUs and cordless tools, and two confirmed drop-in alternatives with documented thermal and timing differences.

Technical Context

The LM2903BIDGKR implements open-collector output architecture with independent dual comparators sharing a single supply rail. Its input stage incorporates dedicated ESD clamps enabling 2 kV HBM robustness and supports differential input voltages up to ±38 V without damage. The device operates with input common-mode voltage ranging from –0.1 V to (V_CC – 2 V), allowing one input to reach V_CC while maintaining correct output state.

Quiescent current remains stable across 2 V–36 V supply range and temperature (–40°C to +125°C), with low-level output voltage specified at 400 mV max (I_SINK ≤ 4 mA) and high-level leakage current below 50 nA at 36 V. Propagation delay is characterized for both TTL-level and small-signal inputs, with 300 ns typical for TTL transitions and 1 µs for 5 mV overdrive steps.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed thermal pad connected to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual comparator applications.

Compared with LM2903DR and TLV1702IDR, the LM2903BIDGKR delivers superior offset accuracy and speed in a space-constrained VSSOP package, making it optimal for industrial motor drives and server PSUs where layout density and fast fault response are critical.

Availability

LM2903BIDGKR is available at Aetrix Electronics and suitable for server PSU monitoring, cordless power tool battery management, and industrial motor drive fault detection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM2903BIDGKR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.

The LM2903BIDGKR belongs to TI's precision comparator product line, engineered specifically for high-reliability industrial and automotive systems demanding low offset, wide supply range, and robust ESD performance.

FAQ

What is the maximum supply voltage rating for LM2903BIDGKR?

The LM2903BIDGKR supports an absolute maximum supply voltage of 38 V, exceeding legacy LM2903 variants rated for 32 V or 36 V. This enables direct integration into 24 V and 36 V industrial control systems without external regulation, while maintaining full functionality across its –40°C to +125°C operating range. The 38 V rating is validated per TI's SLCS005AH datasheet Section 5.1.

Does LM2903BIDGKR require external pull-up resistors on its outputs?

Yes, LM2903BIDGKR features open-collector outputs that require external pull-up resistors to V_CC or another logic rail. Typical values range from 2.2 kΩ to 10 kΩ depending on rise time and fan-out requirements. The device sinks up to 21 mA per output at 5 V, supporting TTL, MOS, and CMOS logic families as specified in Section 1 of the datasheet.

Can LM2903BIDGKR operate with input voltages below ground?

Yes, the LM2903BIDGKR allows input voltages down to –0.1 V relative to GND, as confirmed in Section 5.2 Recommended Operating Conditions. This enables interfacing with transducers or amplifiers producing slightly negative signals without clamping diodes, provided the differential input voltage stays within ±38 V limits.

How does the thermal pad on the DGK package affect LM2903BIDGKR performance?

The exposed thermal pad on the LM2903BIDGKR's VSSOP-8 (DGK) package must be soldered directly to a PCB GND plane to achieve specified thermal resistance (R_θJB = 115.5°C/W). Failure to connect the pad degrades junction-to-board conduction, raising die temperature by up to 35°C at 500 mW dissipation and risking parametric drift or premature failure in high-ambient environments.

Is LM2903BIDGKR pin-compatible with standard LM2903 SOIC-8 designs?

No-LM2903BIDGKR uses the VSSOP-8 (DGK) footprint (3.00 mm × 3.00 mm), which is not mechanically compatible with SOIC-8 (4.90 mm × 3.91 mm). However, it is pinout-identical: pin 1 (1OUT) through pin 8 (V_CC) match function-for-function. Migration requires PCB layout revision but preserves schematic connectivity and firmware logic.