Analog Devices Inc. AD584KH

Overview

AD584KH from Analog Devices is a pin-programmable precision voltage reference IC delivering four factory-trimmed output voltages (10.000 V, 7.500 V, 5.000 V, or 2.500 V) with ±3.5 mV initial tolerance at 25°C and 15 ppm/°C max temperature coefficient over 0°C to +70°C. Housed in an 8-pin TO-99 metal can package, it operates from 4.5 V to 30 V input and supports both sourcing and sinking up to 10 mA output current - ideal for high-accuracy DAC/ADC reference applications in industrial instrumentation.

For engineers reviewing the AD584KH datasheet, AD584KH pinout, AD584KH application, or AD584KH equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in data conversion systems, and two confirmed alternative parts with documented technical and application differences - all grounded in Analog Devices' Rev. C datasheet and ordering guide.

Technical Context

The AD584KH implements a laser-trimmed bandgap reference core (1.215 V) with a programmable resistor ladder and buffered output amplifier, enabling precise selection of four standard outputs without external components. Its strobe terminal (Pin 5) provides zero-output control with <200 µA quiescent current in off-state and full regulation recovery in ≤200 µs.

It supports 2-terminal Zener-mode operation for negative references (e.g., −5 V, −7.5 V, −10 V) when VIN and VOUT are tied, and allows extended-range programming via external resistors - maintaining stability while enabling outputs like 5.12 V or 10.24 V for binary-scaled systems.

Key Specifications

Pinout & Package

AD584KH is supplied in an 8-pin hermetically sealed TO-99 metal can (package option H-08), with tab connected to Pin 4 (COMMON). The package provides excellent thermal stability and EMI shielding for precision analog environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5025ID and ADR441BRZ, the AD584KH trades marginal tempco and noise performance for unique system-level advantages: single-part voltage flexibility, strobe-based power gating, and 2-terminal negative reference generation - reducing component count and PCB area in multi-rail or portable instrumentation.

Availability

AD584KH is available at Aetrix Electronics and suitable for industrial instrumentation, precision data acquisition, and portable test equipment requiring stable component supply, long-lifecycle support, and hermetic packaging for harsh environments.

Supply support for AD584KH 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, serving precision measurement, industrial automation, and aerospace markets since 1965.

The AD584 product line was designed specifically for high-accuracy, multi-voltage reference needs in data conversion systems - emphasizing laser-trimmed stability, programmability, and robust operation across military and industrial temperature ranges.

FAQ

What output voltages does the AD584KH support, and how are they selected?

The AD584KH supports four nominal output voltages: 10.000 V, 7.500 V, 5.000 V, and 2.500 V. Selection is achieved by shorting specific pins per Table 4 in the datasheet - e.g., connecting Pin 2 (5.0V) to Pin 1 (10.0V) configures 5.0 V output. No external resistors are required for these standard values. The AD584KH's internal laser-trimmed resistor ladder ensures accuracy without user trimming.

Does the AD584KH require external capacitors for stability, and if so, where?

The AD584KH does not require external capacitors for basic stability, but a 0.01 µF to 0.1 µF capacitor between Pin 7 (CAP) and Pin 6 (VBG) is recommended to reduce 0.1 Hz–10 Hz noise by up to 50%. This capacitor increases turn-on settling time slightly but improves RMS noise performance - critical for 14-bit ADC applications. No output capacitor is needed for load stability.

Can the AD584KH be used as a negative voltage reference, and what are the constraints?

Yes, the AD584KH can operate in 2-terminal Zener mode to generate precision negative references (e.g., −5.0 V, −7.5 V, −10.0 V) by tying Pin 8 (V+) and Pin 1 (10.0V) together and using Pin 4 (COMMON) as the output node. Current through the device must be maintained between 1 mA and 5 mA (2–5 mA above 85°C), and output impedance rises from 0.2 Ω to 2 Ω - requiring careful load and supply resistor (RS) design per Figure 15.

What is the function of the STROBE pin (Pin 5) on the AD584KH, and how is it driven?

The STROBE pin (Pin 5) on the AD584KH enables output blanking: pulling it below 200 mV forces the output to 0 V while reducing quiescent current to ~100 µA. It must be driven by a low-leakage, open-collector or NPN switch capable of sinking 500 µA continuously. A 10 kΩ pull-up to V+ is typical; a series 100 Ω resistor limits input current if transient sink is expected - ensuring fast, reliable power-gating in battery-sensitive systems.

How does the AD584KH's temperature coefficient compare across output voltages and grades?

The AD584KH guarantees ≤15 ppm/°C maximum temperature coefficient for all four outputs (10.000 V, 7.500 V, 5.000 V, 2.500 V) over 0°C to +70°C. Differential tempco between outputs is ≤3 ppm/°C - meaning relative accuracy between simultaneously buffered outputs remains tight. This spec is distinct from the AD584T (−55°C to +125°C), which specifies ≤20 ppm/°C for the 2.500 V output but maintains ≤15 ppm/°C for higher voltages.