Analog Devices Inc. AD586AR

Overview

AD586AR from Analog Devices is a precision 5.000 V buried Zener voltage reference IC with ±2.0 mV initial accuracy (M grade), 2 ppm/°C max temperature coefficient over 0°C to 70°C, 100 nV/√Hz broadband noise, and output capable of sourcing or sinking 10 mA. It serves as a high-stability external reference for 12–16-bit DACs and ADCs in test equipment and data acquisition systems.

For engineers reviewing the AD586AR datasheet, AD586AR pinout, AD586AR application, or AD586AR equivalent, key selection criteria include its laser-trimmed absolute accuracy, low-drift performance across industrial temperature ranges, noise reduction capability via external capacitor, and compatibility with standard 8-lead SOIC layouts for drop-in upgrades of legacy references.

Technical Context

The AD586AR uses a proprietary ion-implanted buried Zener diode combined with laser-trimmed thin-film resistors to achieve superior long-term stability (15 ppm/1000 hr) and lower drift than bandgap references. Its internal buffer amplifier enables ±10 mA load drive while maintaining <100 µV/mA load regulation.

It features two user-accessible functional pins: Pin 5 (TRIM) supports ±6% fine adjustment of output voltage, and Pin 8 (NOISE REDUCTION) accepts a 1 µF capacitor to reduce 1 MHz noise from 200 µV p-p to ~160 µV p-p without degrading DC accuracy.

Key Specifications

Pinout & Package

AD586AR is supplied in an 8-lead narrow-body SOIC package (R-8), compliant with JEDEC MS-012AA, with 1.27 mm lead pitch and 5.00 mm × 4.00 mm body dimensions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5050AIDR and ADR4550BRZ, the AD586AR uniquely combines laser-trimmed buried Zener accuracy, user-accessible noise filtering, and output trim-making it the only option among the three that supports both field calibration and broadband noise mitigation in a single SOIC-8 footprint.

Availability

AD586AR is available at Aetrix Electronics and suitable for precision data acquisition, automated test equipment, and industrial calibration systems requiring stable component supply with guaranteed long-term availability and traceable lot control.

Supply support for AD586AR 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.

The AD586 product line delivers precision monolithic voltage references using buried Zener technology for applications demanding low drift, low noise, and high long-term stability in test, measurement, and industrial control systems.

FAQ

What is the initial output voltage tolerance of the AD586AR at 25°C?

The AD586AR has an initial output voltage tolerance of ±2.0 mV at 25°C, corresponding to 5.000 V ±0.04%. This specification is guaranteed for the M-grade device and reflects laser trimming of both initial accuracy and temperature coefficient during wafer sort. The AD586AR achieves this tight tolerance without requiring external calibration components, making it suitable for high-accuracy instrumentation where reference uncertainty must be minimized.

Does the AD586AR support noise reduction, and how is it implemented?

Yes, the AD586AR supports noise reduction 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 implementation preserves DC accuracy and temperature coefficient while suppressing high-frequency interference - a capability not found in most competing bandgap references like the REF5050AIDR or ADR4550BRZ.

Can the AD586AR be used to generate a negative reference voltage?

Yes, the AD586AR can be configured as a precision −5.000 V reference by grounding the VOUT pin (Pin 6), connecting VIN (Pin 2) to a +6 V to +30 V supply, and routing the GND pin (Pin 4) through a current-limiting resistor to a −15 V rail. In this inverted configuration, the −5 V output appears at Pin 4. The AD586AR maintains its specified temperature coefficient and long-term stability, enabling bipolar signal chains in precision data converters without adding external op amps or level shifters.

What is the maximum load current the AD586AR can source or sink?

The AD586AR can source or sink up to ±10 mA while maintaining specified load regulation of ≤100 µV/mA (sourcing) and ≤400 µV/mA (sinking). This capability allows direct driving of multiple converter reference inputs, op amp bias networks, or low-power analog circuitry without external buffers. Exceeding ±10 mA risks violating output voltage accuracy and may trigger internal current limiting, especially under elevated temperature conditions.

Is the AD586AR pin-compatible with other industry-standard 5 V references?

Yes, the AD586AR uses an industry-standard 8-lead SOIC pinout (R-8) matching common 5 V references such as the LM399 and LT1021. Pins 2 (VIN), 4 (GND), 6 (VOUT), and 8 (noise filter) align functionally and physically with legacy designs, enabling instant drop-in upgrades without PCB layout changes. However, note that Pins 1, 3, and 7 are internal test points and must remain unconnected - unlike some older references that use all eight pins for active functions.