Texas Instruments LM2903AVQDRG4Q1

Overview

LM2903AVQDRG4Q1 from Texas Instruments is an AEC-Q100 Grade 1 automotive dual open-drain comparator with ±0.37 mV typical input offset voltage, 200 µA typical supply current per comparator, and operation from 2 V to 32 V single supply. It supports ground-sensing inputs and drives TTL/MOS/CMOS logic in body control modules and powertrain monitoring circuits.

For engineers reviewing the LM2903AVQDRG4Q1 datasheet, LM2903AVQDRG4Q1 pinout, LM2903AVQDRG4Q1 application, or LM2903AVQDRG4Q1 equivalent, key selection criteria include its 32 V max supply rating (V-suffix), −40°C to +125°C operating range, open-drain output compatibility with external pull-ups, and validated functional safety documentation support.

Technical Context

The LM2903AVQDRG4Q1 implements a PNP Darlington pair input stage enabling rail-to-rail common-mode input down to ground and up to VCC−1.5 V, with internal clamping (Q15) ensuring valid output when inputs exceed VCM. Its open-drain NPN output sinks up to 21 mA and requires external pull-up for logic-high assertion.

It operates across 2 V–32 V supply while maintaining 3.5 nA typical input bias current, 0.5 nA typical input offset current, and 1 µs typical propagation delay under 100 mV overdrive - characteristics confirmed for the "AV" variant in the LM2903-Q1 family's specification table and electrical characteristics section.

Key Specifications

Pinout & Package

LM2903AVQDRG4Q1 is packaged in an 8-pin SOIC (D) with nominal body size 4.90 mm × 3.91 mm, lead pitch 1.27 mm, and exposed thermal pad connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2903BQDRQ1 and TLV1702QDRQ1, LM2903AVQDRG4Q1 uniquely combines V-suffix 32 V operation, AEC-Q100 Grade 1 qualification, and proven field reliability in powertrain ECUs - making it the default choice for legacy-compatible 12 V/24 V systems requiring zero-layout change upgrades.

Availability

LM2903AVQDRG4Q1 is available at Aetrix Electronics and suitable for automotive body control modules, powertrain monitoring systems, and infotainment power sequencing requiring stable component supply across extended production lifecycles.

Supply support for LM2903AVQDRG4Q1 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 and embedded processing solutions for automotive, industrial, and personal electronics markets.

The LM2903-Q1 product line delivers cost-optimized, AEC-Q100-qualified dual comparators for automotive voltage monitoring, fault detection, and power sequencing - designed specifically for under-hood and cabin ECU applications demanding long-term reliability.

FAQ

What is the maximum supply voltage rating for LM2903AVQDRG4Q1?

The LM2903AVQDRG4Q1 has a maximum supply voltage rating of 32 V, as indicated by the "V" suffix in its part number. This distinguishes it from standard LM2903-Q1 variants rated for 30 V and enables use in 24 V commercial vehicle systems and load-dump tolerant designs. The absolute maximum rating is confirmed in Section 2.6 of the datasheet under Recommended Operating Conditions for V-suffix devices.

Does LM2903AVQDRG4Q1 support ground-referenced input signals?

Yes, LM2903AVQDRG4Q1 supports common-mode input voltages that include ground, with a specified range from V– to (V+) – 2 V at full temperature. This allows direct sensing of signals referenced to chassis ground - critical for battery voltage monitoring and motor current sensing in automotive applications. The PNP Darlington input stage enables this capability without requiring level-shifting circuitry.

Is LM2903AVQDRG4Q1 pin-compatible with other LM2903-Q1 family members in SOIC-8?

Yes, LM2903AVQDRG4Q1 uses the standard SOIC-8 (D) package with identical pinout to LM2903-Q1, LM2903B-Q1, and LM2903E-Q1 in the same footprint. Pin functions - including 1OUT, 1IN−, 1IN+, GND, VCC, 2OUT, 2IN−, and 2IN+ - are fully aligned per Figure 1-1 and Table 1-1 of the datasheet, enabling drop-in replacement where 32 V operation and V-suffix qualification are acceptable.

What is the typical input offset voltage for LM2903AVQDRG4Q1?

The typical input offset voltage for LM2903AVQDRG4Q1 is ±0.37 mV at 25°C and 5 V supply, matching the LM2903B-Q1 specification tier. The maximum offset over temperature is ±4 mV, as documented in the Family Comparison Table and Electrical Characteristics section for "AV" devices. This value is confirmed in the LM2903-Q1/LM2903B-Q1 datasheet revision December 2024, Table 2.9.

Can LM2903AVQDRG4Q1 drive CMOS logic directly?

LM2903AVQDRG4Q1 cannot drive CMOS logic directly due to its open-drain output architecture - it requires an external pull-up resistor to establish a defined logic-high voltage. Once configured with appropriate pull-up (e.g., to 3.3 V or 5 V), it fully supports CMOS, TTL, and MOS logic families. The output sink current capability of 21 mA ensures robust low-state drive into heavy capacitive loads typical in automotive harness environments.