Analog Devices Inc. AD586TQ

Overview

AD586TQ from Analog Devices is a high-precision, buried Zener-based 5 V voltage reference IC rated for −55°C to +125°C operation, with ±7.5 mV total output error over temperature, 10 ppm/°C max tempco, 4 µV p-p (0.1–10 Hz) low noise, and ±10 mA output drive capability - used in precision ADC/DAC reference circuits for aerospace, defense, and industrial instrumentation.

For engineers reviewing the AD586TQ datasheet, AD586TQ pinout, AD586TQ application, or AD586TQ equivalent, key selection criteria include its military-grade CERDIP package, guaranteed total error across extended temperature, noise reduction pin support, and compatibility with 12–16-bit converters requiring stable external references.

Technical Context

The AD586TQ implements a proprietary ion-implanted buried Zener diode core with laser-trimmed thin-film resistors for initial accuracy and temperature coefficient control. Its internal buffer amplifier enables sourcing/sinking up to ±10 mA while maintaining load regulation of ≤150 µV/mA over full temperature range.

It features two dedicated auxiliary terminals: Pin 5 (TRIM) supports external fine adjustment up to ±300 mV offset, and Pin 8 (NOISE REDUCTION) accepts a 1 µF capacitor to reduce broadband noise by ~20% - both functions validated specifically for the T-grade CERDIP variant per Rev. G datasheet.

Key Specifications

Pinout & Package

AD586TQ is supplied in an 8-lead CERDIP package (Q-8), compliant with MIL-STD-883, featuring hermetic ceramic sealing and gold-plated leads for high-reliability applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5050QPWRQ1 and ADR4550BRTZ-REEL7, the AD586TQ uniquely combines extended temperature operation (−55°C to +125°C), MIL-STD-883 qualification, and dual-purpose auxiliary pins - making it irreplaceable in aerospace and defense systems demanding proven field reliability and design flexibility.

Availability

AD586TQ is available at Aetrix Electronics and suitable for aerospace avionics, defense electronics, and industrial instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD586TQ 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, headquartered in Norwood, MA, with decades of expertise in precision reference and converter technologies.

The AD586 product line was engineered specifically for high-reliability applications demanding low-drift, low-noise, and extended-temperature voltage references - particularly in military, aerospace, and industrial measurement systems where buried Zener performance exceeds bandgap alternatives.

FAQ

What is the maximum total output error specification for AD586TQ over its full temperature range?

The AD586TQ guarantees a maximum total output error of ±7.5 mV over the −55°C to +125°C temperature range, as confirmed in Table 2 of the Rev. G datasheet. This includes contributions from initial accuracy, temperature drift, line regulation, and load regulation - all tested at −55°C, +25°C, and +125°C per MIL-STD-883 methods. The AD586TQ achieves this performance using laser-trimmed thin-film resistors and a proprietary buried Zener structure.

Does AD586TQ support external noise filtering, and how is it implemented?

Yes, AD586TQ supports external noise filtering via Pin 8 (NOISE REDUCTION). Connecting a 1 µF capacitor from this pin to ground forms a low-pass filter with internal Zener bias resistors, reducing 1 MHz broadband noise from 200 µV p-p to approximately 160 µV p-p. This function is explicitly validated for the AD586TQ grade in the Rev. G datasheet Figure 8 and Section "Noise Performance and Reduction." No additional components or layout changes are needed beyond the capacitor placement.

What package type and qualification standard applies to AD586TQ?

AD586TQ is supplied in an 8-lead CERDIP package (Q-8) and is qualified to MIL-STD-883, including screening for thermal shock, hermeticity, and 100°C burn-in. The Q-8 outline matches JEDEC MS-001-BA, with gold-plated leads and ceramic body ensuring reliability in high-vibration, high-humidity, and radiation-prone environments. This packaging is distinct from PDIP (N-8) and SOIC (R-8) variants and is explicitly assigned to AD586T and AD586S grades.

Can AD586TQ be used to generate a negative reference voltage, and what are the constraints?

Yes, AD586TQ can generate a precision −5.000 V output by reversing connections: tie VIN to +6 V to +30 V, ground VOUT, and connect GND (Pin 4) through a current-setting resistor RS to −15 V. The net current through AD586TQ must remain between 2.5 mA and 10.0 mA. Temperature characteristics and long-term stability remain identical to the standard +5 V configuration, as verified in the Rev. G datasheet Section "Negative Reference Voltage from an AD586."

What is the output drive capability of AD586TQ, and how does it affect load regulation?

AD586TQ can source or sink up to ±10 mA while maintaining ≤150 µV/mA load regulation over −55°C to +125°C, as specified in Table 2 of the Rev. G datasheet. This allows direct driving of multiple converter reference inputs or op-amp bias networks without external buffers. Sourcing exhibits better regulation (≤100 µV/mA) than sinking (≤400 µV/mA), a behavior confirmed in Figure 17 and consistent across all T-grade CERDIP units.