Diodes Incorporated LM2903AM8-13

Overview

LM2903AM8-13 from Diodes Incorporated is a dual precision voltage comparator with A-grade 1 mV typical input offset voltage, 25 nA input bias current, and rail-to-rail common-mode input range including ground. It operates from single supplies (2 V to 36 V) or split supplies (±1.0 V to ±18 V), features open-collector outputs compatible with TTL/CMOS/MOS logic, and is packaged in MSOP-8 for space-constrained industrial sensing and power supply monitoring applications.

For engineers reviewing the LM2903AM8-13 datasheet, LM2903AM8-13 pinout, LM2903AM8-13 application, or LM2903AM8-13 equivalent, this device is selected for low-offset, wide-supply dual-comparator functions requiring stable output sinking (200 mV @ 4 mA), temperature-invariant supply current (0.6 mA typ. at 5 V), and robust input overvoltage tolerance (±36 V differential).

Technical Context

The LM2903AM8-13 implements two independent PNP-input comparators with uncommitted NPN output transistors, enabling wired-OR configurations and flexible pull-up voltage selection independent of VCC. Its input stage supports common-mode voltages from ground to VCC − 1.5 V and tolerates differential inputs up to ±36 V without damage.

It delivers 1.3 µs typical response time under 5.1 kΩ load with 5 mV overdrive, and maintains constant 0.6 mA supply current across 2 V–36 V operation-enabling direct interface with microcontroller GPIOs, analog front-ends, and legacy logic families without level-shifting.

Key Specifications

Pinout & Package

LM2903AM8-13 is housed in an MSOP-8 package (3.0 mm × 3.0 mm × 0.87 mm, 0.65 mm pitch), optimized for high-density PCB layouts in portable and industrial control modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2903DR2G, LM2903AM8-13 saves 40% board area in high-density layouts; versus TLV3702IDR, it supports higher supply voltages and harsher industrial transients but consumes more quiescent current.

Availability

LM2903AM8-13 is available at Aetrix Electronics and suitable for industrial power supply monitors, motor control feedback loops, temperature alarm systems, and sensor interface modules requiring stable component supply across extended temperature ranges (−40 °C to +125 °C).

Supply support for LM2903AM8-13 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for industrial, computing, consumer, and communications markets.

The LM2903 series belongs to Diodes' precision analog comparator product line, engineered for robust performance in noisy industrial environments with wide supply flexibility and high ESD tolerance (500 V HBM).

FAQ

Can LM2903AM8-13 operate with a 3.3 V supply?

Yes. The LM2903AM8-13 supports single-supply operation from 2 V to 36 V, including 3.3 V. At 3.3 V, its typical supply current remains 0.6 mA, input common-mode range extends from 0 V to 1.8 V, and output saturation voltage stays below 200 mV at 4 mA sink-ensuring compatibility with 3.3 V logic interfaces.

Does LM2903AM8-13 require external hysteresis for stable operation?

Hysteresis is recommended when input signals have slow edges or high noise susceptibility, such as in temperature monitoring with thermistors. The datasheet confirms oscillation risk without hysteresis due to stray capacitance; adding 1–10 mV positive feedback eliminates transition-time instability while preserving threshold accuracy.

What is the maximum sink current per output of LM2903AM8-13?

The absolute maximum sink current is 20 mA per output, but the guaranteed minimum sink current is 6 mA at VO ≤ 1.5 V. For reliable long-term operation, design to ≤16 mA-beyond which the output transistor exits saturation and VO rises rapidly. Derating is advised above 85 °C ambient.

Is LM2903AM8-13 pin-compatible with standard SO-8 dual comparators?

No. LM2903AM8-13 uses the MSOP-8 package with a different pinout than SO-8. While both share the same functional pin assignments (e.g., Pin 1 = OUT1), MSOP-8 has 0.65 mm pitch and 3.0 mm × 3.0 mm body size versus SO-8's 1.27 mm pitch and 4.9 mm × 6.0 mm body-requiring distinct PCB footprints and reflow profiles.