Analog Devices Inc. OP484ESZ

Overview

OP484ESZ from Analog Devices is a quad precision rail-to-rail input and output operational amplifier optimized for single-supply instrumentation, DAC output buffering, and ADC input conditioning. It operates from 3 V to 36 V (±1.5 V to ±18 V), delivers 4 MHz gain bandwidth, 3.9 nV/√Hz voltage noise, and 65 μV typical input offset voltage at 25°C - enabling high-fidelity signal conditioning in battery-powered and industrial sensor interfaces.

For engineers reviewing the OP484ESZ datasheet, OP484ESZ pinout, OP484ESZ application, or OP484ESZ equivalent, this page provides verified specifications, validated 14-lead narrow-body SOIC package details, confirmed rail-to-rail I/O behavior across −40°C to +125°C, and two rigorously cross-referenced alternative op-amps with documented functional trade-offs.

Technical Context

The OP484ESZ employs a dual-differential input stage (NPN + PNP pairs) enabling true rail-to-rail common-mode input range (0 V to V_S) and output swing within 125 mV of rails at 1 mA load. Its compound folded-cascade second stage ensures unity-gain stability and 4.0 V/μs slew rate under ±15 V supply, while internal output short-circuit limiting caps current at ±20 mA.

Designed for low-noise precision DC and AC performance, it features 86 dB CMRR over 1.0–4.0 V common-mode range at extended temperature, 76–90 dB PSRR across supply voltages, and 0.3 μV_p-p (0.1–10 Hz) input voltage noise - making it suitable for multistage active filters and transducer interfaces requiring minimal signal degradation.

Key Specifications

Pinout & Package

OP484ESZ is packaged in a 14-lead narrow-body SOIC (S-suffix), footprint-compatible with industry-standard 14-SOIC-NB (5.3 mm width). Thermal resistance θ_JA = 92°C/W and θ_JC = 27°C/W support reliable operation at full rated current in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision rail-to-rail op-amp applications.

Compared with OP484ESZ, ADA4075-4 trades 2× lower noise for 2.5× higher quiescent current and reduced supply voltage flexibility (max ±15 V), while OP497GPZ sacrifices bandwidth and offset accuracy to achieve 1/10th the supply current - making OP484ESZ the balanced choice for general-purpose precision instrumentation requiring rail-to-rail operation across wide supplies.

Availability

OP484ESZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, DAC output amplification, and ADC input buffering requiring stable component supply across automotive, industrial, and medical device production programs.

Supply support for OP484ESZ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The OPx84 family - including OP484ESZ - was engineered for portable and single-supply instrumentation, combining precision dc specs, wide ac bandwidth, and rail-to-rail I/O to replace legacy op-amps in space-constrained, low-voltage measurement systems.

FAQ

What is the maximum operating temperature range for OP484ESZ?

The OP484ESZ is specified over the extended industrial temperature range of −40°C to +125°C. This rating applies to both E-grade and F-grade versions and is validated per Analog Devices' Rev. J datasheet, Table 5. Operation outside this range may result in parametric shift or reliability risk. The 14-lead narrow-body SOIC package supports this range with θ_JA = 92°C/W under standard JEDEC PCB conditions.

Does OP484ESZ support true rail-to-rail input common-mode voltage?

Yes, OP484ESZ supports rail-to-rail input common-mode voltage - from V⁻ to V⁺ - across all supply conditions (3 V to 36 V). This is achieved via its dual NPN/PNP input stage, as detailed in Figure 44 of the Rev. J datasheet. At 5 V supply, the input range is 0 V to 5 V; at ±15 V, it is −15 V to +15 V. No external level shifting is required for full-scale signal capture.

What is the typical output voltage swing for OP484ESZ at 5 V supply?

At 5 V supply and 1 mA load, OP484ESZ delivers a typical output swing of 125 mV above V⁻ (0 V) and 200 mV below V⁺ (5 V), i.e., 0.125 V to 4.80 V. This is confirmed in Table 2 (VOH = 4.80 V, VOL = 125 mV) of the Rev. J datasheet. The asymmetry arises from differing saturation voltages of sourcing and sinking output transistors.

Is OP484ESZ unity-gain stable?

Yes, OP484ESZ is explicitly designed for unity-gain stability, as stated in the Features section and verified by phase margin ≥45° (Table 2) and ≥50° (Table 4) under no-load and loaded conditions. Its internal compensation eliminates need for external capacitors in G = 1 configurations - critical for DAC buffers and voltage followers where bandwidth and stability must coexist.

How does OP484ESZ handle input overvoltage conditions?

OP484ESZ lacks internal series input resistors. When input exceeds V⁺ by >1.8 V or falls below V⁻ by >0.6 V, internal junctions conduct, permitting current flow. To avoid damage, external series resistors must limit fault current to ≤5 mA - e.g., a 1 kΩ resistor protects against ±5 V overvoltage. This behavior is documented in Figure 46 and Applications Information section of Rev. J.