Analog Devices Inc. AD8574TRUZ-EP-RL

Overview

AD8574TRUZ-EP-RL from Analog Devices is a quad, zero-drift, rail-to-rail input/output operational amplifier optimized for precision DC-coupled signal conditioning in harsh environments. It delivers 1 μV offset voltage, 0.005 μV/°C drift, and 145 dB open-loop gain at 5 V supply, operating across −55°C to +125°C for aerospace-grade sensor front-ends.

For engineers reviewing the AD8574TRUZ-EP-RL datasheet, AD8574TRUZ-EP-RL pinout, AD8574TRUZ-EP-RL application, or AD8574TRUZ-EP-RL equivalent, key selection criteria include ultralow drift over military temperature range, single-supply rail-to-rail I/O swing down to 2.7 V, and enhanced product qualification for defense systems.

Technical Context

The AD8574TRUZ-EP-RL uses a patented spread-spectrum auto-zero architecture to eliminate chopper-induced intermodulation while maintaining sub-μV offset and nanovolt-per-degree drift. Its four independent amplifiers share a common 14-lead TSSOP package with fully independent input and output stages.

It supports true single-supply operation from 2.7 V to 5 V, with rail-to-rail input common-mode range (0 V to V_S) and output swing within 10 mV of rails under light load. CMRR (140 dB typical) and PSRR (130 dB typical) are maintained across full temperature range.

Key Specifications

Pinout & Package

AD8574TRUZ-EP-RL is housed in a 14-lead TSSOP (RU-14) package per JEDEC MO-153-AB-1, with 0.65 mm lead pitch and 4.4 mm × 5.0 mm body size. Thermal resistance θ_JA = 180°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision operational amplifier applications.

Compared with AD8574TRUZ-EP-RL, AD8628ARZ trades quad integration and military temperature coverage for lower unit cost, while OPA2189IDRCT offers comparable drift performance but omits defense-grade reliability controls and full −55°C operation - making AD8574TRUZ-EP-RL uniquely suited for mission-critical aerospace signal chains.

Availability

AD8574TRUZ-EP-RL is available at Aetrix Electronics and suitable for aerospace avionics, defense electronics, and industrial process control systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD8574TRUZ-EP-RL 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 AD857x-EP series was developed specifically for defense and aerospace applications requiring guaranteed operation from −55°C to +125°C, AQEC compliance, and controlled manufacturing baselines - targeting precision sensor signal conditioning in mission-critical platforms.

FAQ

What is the operating temperature range of the AD8574TRUZ-EP-RL?

The AD8574TRUZ-EP-RL is specified for continuous operation from −55°C to +125°C, meeting military-grade environmental requirements. This range is validated through enhanced product qualification including extended burn-in, thermal cycling, and lot traceability - unlike commercial variants that typically stop at +125°C without low-temperature validation. The AD8574TRUZ-EP-RL maintains its 1 μV offset and 0.005 μV/°C drift specifications across this full span.

Does the AD8574TRUZ-EP-RL require external compensation capacitors?

No, the AD8574TRUZ-EP-RL is internally compensated for unity-gain stability and requires no external capacitors. Its gain-bandwidth product is 1.5 MHz at 5 V and 1 MHz at 2.7 V, with phase margin verified across voltage and temperature extremes. This eliminates layout sensitivity and saves board space in compact modules - a key advantage confirmed in the "No external capacitors required" feature list and Figure 12–13 open-loop response plots.

How does the AD8574TRUZ-EP-RL achieve ultralow input bias current?

The AD8574TRUZ-EP-RL achieves 10 pA typical input bias current using complementary metal-oxide-semiconductor (CMOS) input transistors with guarded input structures and proprietary process optimization. This is validated in Table 1 and Figure 3–4, showing bias current remains below 50 pA up to +125°C and stays flat across the full input common-mode range - enabling accurate amplification of signals from high-impedance sources like piezoelectric sensors and pH electrodes without loading error.

Is the AD8574TRUZ-EP-RL pin-compatible with standard AD8574 variants?

Yes, the AD8574TRUZ-EP-RL shares identical pinout, footprint, and electrical behavior with non-EP versions such as AD8574ARUZ, as confirmed by the shared 14-lead TSSOP (RU-14) package outline in Figure 45 and matching pin configuration diagrams. However, the EP version adds enhanced product features including military temperature screening, controlled manufacturing baseline, and AQEC compliance - all without altering pin function or mechanical interface.

What is the overload recovery time specification for the AD8574TRUZ-EP-RL?

The AD8574TRUZ-EP-RL has an overload recovery time of 50 μs maximum, defined as the time required to recover to 99% of final value after an output overdrive event. This is measured under RL = 10 kΩ load per Table 1 and validated in Figure 18–19 transient response curves. The fast recovery supports robust operation in systems with transient input faults or ESD events, ensuring minimal disruption to downstream ADC sampling or control loops.