Analog Devices Inc. AD580TH

Overview

AD580TH from Analog Devices is a 3-terminal, laser-trimmed bandgap voltage reference delivering a precise 2.500 V ±10 mV output across –55°C to +125°C, with 25 ppm/°C temperature coefficient, 10 mV load regulation (ΔI = 10 mA), and 1.5 mA max quiescent current - used as a stable external reference for 12-bit DACs like AD7542 in single 5 V supply systems.

For engineers reviewing the AD580TH datasheet, AD580TH pinout, AD580TH application, or AD580TH equivalent, key selection criteria include guaranteed ±10 mV initial tolerance, hermetic TO-52 metal-can packaging for high-reliability environments, low-noise 8 µV p-p (0.1 Hz–10 Hz), and compatibility with precision data acquisition requiring long-term stability of ≤250 µV.

Technical Context

The AD580TH implements a bandgap reference architecture using two transistors biased at different current densities to generate a temperature-compensated ΔV_BE, summed with V_BE to yield a stable 1.205 V base reference, then amplified to 2.500 V. Its quasi-parabolic temperature response enables full-range deviation specification (±10 mV over –55°C to +125°C), unlike S-curve Zener references.

It operates as a 3-terminal device (V_IN, V_OUT, GND) with no external components required, supports input voltages from 4.5 V to 30 V, and delivers regulated output with line regulation of 2 mV (7–30 V) and 1 mV (4.5–7 V). Its 100°C/W junction-to-case thermal resistance suits high-reliability military and aerospace mounting.

Key Specifications

Pinout & Package

AD580TH is housed in a hermetic TO-52 metal can package (H-03A), with 3 terminals arranged in bottom-view configuration: +E (anode/input), –E (cathode/GND), and EOUT (output). The package meets MIL-STD-883 requirements and provides superior moisture and thermal performance versus plastic alternatives.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with REF5025IDR and ADR441BRTZ-REEL7, the AD580TH trades absolute precision for hermetic reliability, military-grade temperature range, and proven field longevity in sealed enclosures - making it optimal where environmental robustness outweighs sub-ppm stability needs.

Availability

AD580TH is available at Aetrix Electronics and suitable for digital panel meters, aerospace sensor conditioning, high-reliability test equipment, and microprocessor DAC systems requiring stable component supply with long lifecycle assurance.

Supply support for AD580TH 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 AD580 series was designed specifically for precision voltage reference applications in data acquisition, instrumentation, and military systems - emphasizing laser-trimmed accuracy, hermetic packaging, and wide-temperature operation.

FAQ

What is the guaranteed initial output voltage tolerance for AD580TH?

The AD580TH guarantees an initial output voltage tolerance of ±10 mV (±0.4%) around the nominal 2.500 V output at 25°C, as specified in Table 1 of the Rev. B datasheet. This tolerance is achieved via laser trimming of on-chip thin-film resistors and is tested on all production units. The AD580TH maintains this accuracy across its full –55°C to +125°C operating range with a 25 ppm/°C temperature coefficient.

Does AD580TH require external components to function as a voltage reference?

No, the AD580TH operates as a fully self-contained 3-terminal voltage reference - requiring only input voltage applied to +E, ground connection to –E, and load connected to EOUT. Its internal bandgap circuitry and laser-trimmed resistors eliminate the need for external capacitors, resistors, or feedback networks. This simplifies PCB layout and improves system reliability compared to discrete or Zener-based solutions.

What package type and mounting considerations apply to AD580TH?

The AD580TH uses a hermetic TO-52 metal-can package (H-03A) with three terminals: +E, –E, and EOUT. It features a 100°C/W junction-to-case thermal resistance and is MIL-STD-883 compliant. Mounting requires low-thermal-resistance mechanical attachment (e.g., solder-sealing or conductive epoxy) to a heat-spreading surface, and the case must remain electrically isolated unless explicitly grounded per design.

Can AD580TH be used with a 5 V supply, and what is its minimum input voltage?

Yes, the AD580TH is fully compatible with a 5 V supply and is explicitly recommended for single-rail 5 V systems such as digital panel meters and microprocessor DAC interfaces. Its minimum input voltage is 4.5 V, verified across the full –55°C to +125°C temperature range. At 5 V input, it delivers full 2.500 V output with ≤2 mV line regulation error and ≤10 mV load regulation up to 10 mA.

How does AD580TH's long-term stability compare to typical industry benchmarks?

The AD580TH guarantees ≤250 µV total long-term output drift over time, with ≤25 µV per month - significantly better than standard Zener references (typically 50–100 µV/month) and competitive with high-end buried-zener ICs. This stability is validated under accelerated life testing and enables extended calibration intervals in metrology and aerospace applications where field recalibration is impractical.