Analog Devices Inc. AD574ATE/883B

Overview

AD574ATE/883B from Analog Devices is a military-grade 12-bit monolithic analog-to-digital converter with internal 10 V reference, ±5 V or ±10 V bipolar/unipolar input ranges, and guaranteed ±1 LSB linearity over –55°C to +125°C. It delivers 35 µs max 12-bit conversion time, operates on ±12 V/±15 V analog and +5 V digital supplies, and is used in precision data acquisition for avionics, missile guidance, and ruggedized test equipment.

For engineers reviewing the AD574ATE/883B datasheet, AD574ATE/883B pinout, AD574ATE/883B application, or AD574ATE/883B equivalent, key selection criteria include full-temperature-range linearity (±1 LSB), internal reference stability (10.00 V ±0.2%), unipolar/bipolar mode flexibility, MIL-STD-883B screening compliance, and DIP-28 ceramic package suitability for high-reliability systems.

Technical Context

The AD574ATE/883B implements a successive-approximation architecture with an internal 12-bit current-output DAC, temperature-compensated buried Zener reference, and on-chip comparator. Its SAR logic sequences MSB-to-LSB bit testing using dynamically weighted currents balanced against the analog input through 5 kΩ or 10 kΩ scaling resistors.

It supports dual data modes: 12-bit parallel output or byte-accessible 8-bit+4-bit nibble reads via AO and 12/8 control pins, with STS status flag signaling conversion progress. Input impedance is 3–7 kΩ (10 V span) or 6–14 kΩ (20 V span), and reference output supplies up to 1.5 mA while maintaining regulation during conversion.

Key Specifications

Pinout & Package

Ceramic Dual-In-Line Package (D-28), hermetically sealed, MIL-STD-883B screened, 0.600-inch wide body, 0.300-inch lead spacing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit ADC applications.

Compared with AD7896ARZ and ADS8505IPFBT, the AD574ATE/883B uniquely combines military screening, parallel 12-bit output, bipolar/unipolar flexibility, and ceramic DIP packaging - making it irreplaceable in legacy avionics upgrades and safety-critical analog interface modules where form, fit, function, and qualification are non-negotiable.

Availability

AD574ATE/883B is available at Aetrix Electronics and suitable for avionics sensor interfaces, missile guidance feedback loops, and ruggedized test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD574ATE/883B 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, serving industrial, automotive, communications, and defense markets since 1965.

The AD574A product line was engineered for high-accuracy, single-chip data acquisition in mission-critical systems - prioritizing guaranteed linearity, internal reference integrity, and robustness across extreme environmental conditions.

FAQ

What is the operating temperature range for the AD574ATE/883B?

The AD574ATE/883B is screened to MIL-STD-883B and specified for continuous operation from –55°C to +125°C. This range is guaranteed for all electrical parameters including ±1 LSB linearity error, full-scale calibration accuracy, and reference stability - verified through temperature cycling and burn-in per Method 5005.

Does the AD574ATE/883B require external calibration components?

The AD574ATE/883B includes internal thin-film trimmed resistors and a temperature-compensated Zener reference, enabling operation without external calibration in many applications. However, unipolar offset (Pin 12) and full-scale (Pins 8–10) trims are provided for systems demanding ≤±0.5 LSB accuracy; a 50 Ω ±1% resistor between REF OUT and REF IN achieves zero full-scale error.

How is the AD574ATE/883B interfaced to an 8-bit microcontroller bus?

The AD574ATE/883B supports 8-bit interface via its AO and 12/8 pins: tie 12/8 to Digital Common to output two 8-bit bytes, then use AO = 0 to read DB11–DB4 (MSB byte) and AO = 1 to read DB3–DB0 followed by four trailing zeroes (LSB byte). STS must be monitored to avoid reading during conversion.

Can the AD574ATE/883B operate with ±12 V supplies instead of ±15 V?

Yes - the AD574ATE/883B is fully specified for V_CC = +11.4 V to +16.5 V and V_EE = –11.4 V to –16.5 V, covering both ±12 V and ±15 V operation. When using ±12 V, the internal reference output current capability drops; Analog Devices recommends buffering REF OUT with an op amp (e.g., AD708) to maintain regulation under load.

What is the purpose of the STS pin on the AD574ATE/883B?

The STS (Status) pin on the AD574ATE/883B is an active-high open-collector output that goes high at conversion start and returns low when the 12-bit result is fully settled and valid on DB11–DB0. It provides hardware handshaking to prevent premature data reads and replaces the need for fixed delay timing in microprocessor interfaces.