Texas Instruments LP2901IDRG4Q1

Overview

LP2901IDRG4Q1 from Texas Instruments is an AEC-Q100 qualified automotive-grade quad differential comparator designed for single-supply operation (3 V to 30 V), delivering ultra-low supply current (60 µA typ), ±2 mV input offset voltage, and 30 mA output sink capability at VO = 2 V - used in battery-powered threshold detection and CMOS logic interfacing.

For engineers reviewing the LP2901IDRG4Q1 datasheet, LP2901IDRG4Q1 pinout, LP2901IDRG4Q1 application, or LP2901IDRG4Q1 equivalent, key selection considerations include its wide common-mode input range (including ground), reverse-voltage-protected supply input, bimodal output stage for high/low-voltage sinking, and compatibility with TTL/CMOS logic families.

Technical Context

The LP2901IDRG4Q1 integrates four independent comparators with p-n-p input stages enabling low input bias current (3 nA typ) and rail-to-rail common-mode input (0 V to VCC – 2 V). Its output stage uses a dual-mode Darlington/ground-emitter configuration to sustain 30 mA sink at VO ≥ 1.5 V and ~700 µA at VO ≤ 0.4 V without saturation-induced dropout.

It supports single-supply operation only (no split-supply requirement), features power-supply reverse-voltage protection, and maintains stable 60 µA supply current across 3–30 V - making it suitable for automotive sensor interface, battery monitoring, and fault-detection circuits where supply rails vary or are unregulated.

Key Specifications

Pinout & Package

LP2901IDRG4Q1 is housed in a 14-pin SOIC (D package), 3.9 mm × 8.65 mm body, 1.75 mm max height, with standard 1.27 mm pitch. Pin 1 marked via corner chamfer or mold index.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2901DR and TLV3704IPW, the LP2901IDRG4Q1 uniquely combines AEC-Q100 qualification, 30 V operation, and 30 mA sink capability - making it the only option among the three validated for automotive 24 V battery monitoring and high-side load control.

Availability

LP2901IDRG4Q1 is available at Aetrix Electronics and suitable for automotive battery management, engine control unit diagnostics, and industrial sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LP2901IDRG4Q1 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 specializing in analog, embedded processing, and automotive ICs, with decades of expertise in high-reliability analog signal conditioning.

The LP2901IDRG4Q1 belongs to TI's automotive-qualified comparator portfolio, engineered specifically for robust threshold detection in harsh environments - including engine compartments, battery systems, and ADAS sensor interfaces.

FAQ

What is the operating temperature range for LP2901IDRG4Q1?

The LP2901IDRG4Q1 is rated for operation from –40°C to +85°C and is AEC-Q100 Grade 3 qualified. This makes it suitable for under-hood automotive applications where ambient temperatures fluctuate widely. The device maintains specified performance across this full range, including input offset voltage and supply current stability. LP2901IDRG4Q1 does not support extended industrial (–40°C to +125°C) or military temperature grades.

Can LP2901IDRG4Q1 operate from a 3.3 V supply?

Yes, LP2901IDRG4Q1 supports supply voltages as low as 3 V, so it functions correctly at 3.3 V. At this rail, its input common-mode range extends from 0 V to 1.3 V, and output sink current remains usable (~15 mA at VO = 0.4 V). However, maximum output swing is limited by VCC, and the 30 mA sink rating applies at VO = 2 V - which is achievable only if an external pull-up is tied to a higher rail. LP2901IDRG4Q1 retains full functionality at 3.3 V for low-voltage logic interfacing.

Is LP2901IDRG4Q1 pin-compatible with LM339?

Yes, LP2901IDRG4Q1 is pin-for-pin compatible with LM339, LM239, and LM2901 per TI's official documentation. All share identical SOIC-14 pin assignments, electrical behavior, and functional block diagram. This allows drop-in replacement in existing designs - provided the application requires AEC-Q100 qualification and operates within the –40°C to +85°C range. LP2901IDRG4Q1 retains the same footprint, solder mask layout, and PCB land pattern as LM339.

Does LP2901IDRG4Q1 require external pull-up resistors on its outputs?

Yes, LP2901IDRG4Q1 features open-collector outputs and requires external pull-up resistors to define logic HIGH level. Pull-up voltage may be any value within the allowed supply range (up to 30 V), independent of VCC - enabling level translation (e.g., VCC = 5 V, pull-up = 3.3 V or 24 V). Typical values range from 2.2 kΩ to 10 kΩ depending on speed and current requirements. Without pull-ups, outputs remain floating and cannot drive logic inputs. This design is inherent to LP2901IDRG4Q1's architecture.

How does the bimodal output stage of LP2901IDRG4Q1 improve system performance?

The bimodal output stage in LP2901IDRG4Q1 dynamically switches between Darlington (for VO > 1.5 V) and ground-emitter (for VO < 0.8 V) modes, ensuring strong sink current across the full output voltage swing. At VO = 2 V, it delivers 30 mA; at VO = 0.4 V, it sustains ~700 µA - avoiding the "current collapse" seen in conventional comparators near ground. This eliminates need for external transistor buffers when driving LEDs or logic, reduces BOM count, and improves noise immunity in LP2901IDRG4Q1-based designs.