Analog Devices Inc. CMP04FSZ-REEL

Overview

CMP04FSZ-REEL from Analog Devices is a quad low-power precision comparator IC with 1 mV max input offset voltage, 250 mV max output saturation voltage at 4 mA, and 125 V/mV typical voltage gain. It operates from single or dual supplies (up to ±18 V), features rail-to-rail input common-mode range including ground, and delivers TTL/CMOS/ECL-compatible open-collector outputs for industrial sensor threshold detection and analog signal conditioning.

For engineers reviewing the CMP04FSZ-REEL datasheet, CMP04FSZ-REEL pinout, CMP04FSZ-REEL application, or CMP04FSZ-REEL equivalent, this device is selected for precision level-shifting, window detection, and zero-crossing circuits where low power (1.2–3.0 mA total supply current), high CMRR (60–100 dB), and robust input overvoltage tolerance (–0.3 V to +30 V) are critical.

Technical Context

The CMP04FSZ-REEL integrates four independent comparators in a single SOIC-14 package, each with internally compensated high-gain differential input stages and open-collector NPN output transistors. Its input stage supports common-mode voltages from ground to V+ – 1.5 V, enabling direct interfacing with sensors and DACs in single-supply systems.

Each comparator exhibits low input bias current (40–200 nA), low input offset current (4–20 nA), and guaranteed 5 mA minimum sink capability at ≤1.5 V output. The device's 300 ns large-signal response time and 1.3 µs small-signal response support fast decision-making in timing-critical applications like pulse-width monitoring and one-shot generation.

Key Specifications

Pinout & Package

Package: 14-Lead SOIC_N (JEDEC MS-012-AB, narrow body, R-14 footprint; 8.75 mm × 4.00 mm × 1.75 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DR and TLV3704IPW, the CMP04FSZ-REEL uniquely balances precision (1 mV offset), ruggedness (+30 V input), and industrial temperature range (–40°C to +85°C) while maintaining TTL-compatible drive strength - making it optimal for factory automation and power electronics where reliability trumps ultra-low power.

Availability

CMP04FSZ-REEL is available at Aetrix Electronics and suitable for industrial sensor interfaces, power supply monitors, zero-crossing detectors, and PWM feedback circuits requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CMP04FSZ-REEL 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The CMP04FSZ-REEL belongs to Analog Devices' precision comparator product line, engineered for applications demanding low offset, low power, and robust input protection in harsh electrical environments.

FAQ

What is the maximum input voltage rating for CMP04FSZ-REEL?

The CMP04FSZ-REEL supports an absolute maximum input voltage of –0.3 V to +30 V per input pin, independent of supply voltage. This allows direct connection to unregulated sources or scaled AC signals without external clamping, provided the differential input voltage remains within ±36 V. The device survives transient overvoltages up to +30 V on either input while powered or unpowered.

Does CMP04FSZ-REEL support true rail-to-rail input operation?

The CMP04FSZ-REEL does not provide full rail-to-rail input common-mode range. Its specified input voltage range is 0 V to V+ – 1.5 V, meaning the upper limit falls 1.5 V below the positive supply rail. However, inputs tolerate voltages up to +30 V regardless of V+, enabling safe interfacing with higher-voltage signals through resistive dividers - a key distinction from standard rail-to-rail comparators.

Can CMP04FSZ-REEL replace LM339 in existing designs without layout changes?

Yes - the CMP04FSZ-REEL is pin-compatible and functionally equivalent to the LM339 in SOIC-14 packages. It shares identical pinout (IN+, IN–, OUT per channel, V+, GND), open-collector output structure, and single/dual-supply operation. No PCB modifications are required; users benefit immediately from lower offset (1 mV vs. 2–6 mV), lower power, and guaranteed –40°C to +85°C performance.

What is the output sink current capability of CMP04FSZ-REEL?

The CMP04FSZ-REEL guarantees a minimum output sink current of 5 mA at VO ≤ 1.5 V, with typical performance reaching 16 mA. This enables direct driving of LED indicators, optocouplers, and TTL/CMOS inputs without external buffer transistors. The 250–700 mV saturation voltage at 4 mA ensures strong logic-low assertion even under load variations.

Is CMP04FSZ-REEL suitable for use in high-noise industrial environments?

Yes - the CMP04FSZ-REEL delivers 60–100 dB common-mode rejection ratio (CMRR) and 80–100 dB power supply rejection ratio (PSRR), validated across its full –40°C to +85°C operating range. Combined with input overvoltage tolerance and low 40–200 nA bias current, it maintains stable switching thresholds in electrically noisy settings such as motor drives, welding equipment, and factory floor instrumentation.