Diodes Incorporated LM2901AQS14-13

Overview

LM2901AQS14-13 from Diodes Incorporated is a quad differential voltage comparator with A-grade precision (1 mV typical input offset voltage), designed for automotive signal conditioning in single-supply systems from 2 V to 36 V. It features rail-to-rail common-mode input range including ground, 0.9 mA supply current at 5 V, and open-collector outputs compatible with TTL/CMOS logic-used in battery monitoring, window comparators, and overvoltage protection circuits.

For engineers reviewing the LM2901AQS14-13 datasheet, LM2901AQS14-13 pinout, LM2901AQS14-13 application, or LM2901AQS14-13 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, TSSOP-14 package with industry-standard pinout, low 100 mV output saturation voltage at 4 mA, and guaranteed operation across –40°C to +125°C ambient temperature.

Technical Context

This quad comparator uses PNP-input stage architecture enabling input voltages up to 36 V independent of VCC, with common-mode range extending to ground and differential input voltage tolerance of ±36 V. Its uncommitted NPN output transistors support wired-OR configurations and flexible pull-up to any supply within the 2–36 V range.

The device delivers 200 V/mV small-signal voltage gain and sub-microsecond response time (1.3 µs typical) under 5.1 kΩ load, with input bias current fixed at 25 nA (typ) and input offset current limited to ±5 nA (typ)-critical for high-impedance sensor interface stability.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, exposed pad optional, RoHS-compliant "green" mold compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2901AQS14-13, LM2901QDR2G trades package compactness for marginally higher thermal mass, while TLV3704QDRQ1 offers rail-to-rail flexibility at the cost of automotive-grade reliability and high-temperature operation.

Availability

LM2901AQS14-13 is available at Aetrix Electronics and suitable for automotive battery management, ADAS sensor interface, and powertrain control applications requiring stable component supply across long production lifecycles.

Supply support for LM2901AQS14-13 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 automotive, industrial, and consumer markets, with manufacturing certified to IATF 16949.

The LM2901Q series belongs to Diodes' AEC-Q100-qualified precision comparator product line, engineered specifically for robust signal conditioning in harsh automotive environments where reliability and parametric consistency are non-negotiable.

FAQ

Can LM2901AQS14-13 operate from dual supplies?

Yes-it supports dual supplies from ±1.0 V to ±18 V. The input common-mode range extends to within 1.5 V of either rail, and differential input voltage tolerance remains ±36 V. However, the GND pin must be connected to the negative supply node, not earth ground, to maintain proper biasing of the PNP input stage.

What is the maximum sink current per output?

Each open-collector output can sink up to 16 mA continuously while maintaining saturation voltage ≤400 mV (full temperature range). At 4 mA, saturation voltage is guaranteed ≤100 mV. Exceeding 16 mA causes the output transistor to exit saturation, raising VO rapidly above 1.5 V.

Is external hysteresis required for stable operation?

Hysteresis is strongly recommended for DC or slowly varying inputs to prevent oscillation due to noise coupling. The datasheet specifies that even 1–10 mV of positive feedback eliminates transition-region instability. For fast pulse inputs (e.g., encoder signals), hysteresis may be omitted if edge slew rates exceed 1 V/µs.

How does the input stage handle voltages above VCC?

The PNP-based input stage allows either input to swing up to +36 V independently of VCC level, provided the common-mode voltage stays within 0 V to VCC − 1.5 V. This enables direct connection to battery or alternator lines without level-shifting, but input voltage below −0.3 V (relative to GND) requires clamping diodes to avoid damage.