Analog Devices Inc. AD574ASE/883B

Overview

AD574ASE/883B from Analog Devices is a military-grade, monolithic 12-bit successive-approximation analog-to-digital converter (ADC) with on-chip reference, internal clock, and three-state parallel output. It delivers ±1 LSB linearity error over –55°C to +125°C, supports unipolar (0 V to +10 V or 0 V to +20 V) and bipolar (±5 V or ±10 V) input ranges, and achieves 35 µs max 12-bit conversion time. It is used in high-reliability data acquisition systems for avionics, missile guidance, and ruggedized test instrumentation.

For engineers reviewing the AD574ASE/883B datasheet, AD574ASE/883B pinout, AD574ASE/883B application, or AD574ASE/883B equivalent, this page provides verified specifications, MIL-STD-883B qualified package details, temperature-stable offset and full-scale calibration behavior, and real-world interface constraints including 12/8-mode data formatting and STS-driven status signaling.

Technical Context

The AD574ASE/883B integrates a 12-bit current-output DAC, buried Zener voltage reference (10.00 V ±0.2%), comparator, successive-approximation register (SAR), and output buffers - requiring no external timing or trimming components for basic operation. Its internal reference supplies up to 1.5 mA while maintaining ±5 ppm/°C full-scale drift over –55°C to +125°C when screened per MIL-STD-883B.

Control logic supports both 12-bit and 8-bit conversion cycles via AO pin selection, and data readout in either single 12-bit word (12/8 = VLOGIC) or two 8-bit bytes (12/8 = DIGITAL COMMON). The STS signal asserts high at conversion start and returns low upon completion, enabling precise software- or hardware-synchronized data capture without polling.

Key Specifications

Pinout & Package

Ceramic DIP-28 (D-28) package, hermetically sealed, MIL-STD-883B tested, with 0.3-inch wide body and 0.1-inch lead pitch. Pin 1 index located at top-left corner when viewed from top with notch oriented left.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7896ARZ and ADS8505IPFB, the AD574ASE/883B uniquely combines military temperature range, internal reference, bipolar/unipolar flexibility, and DIP-28 through-hole reliability - making it irreplaceable in legacy avionics upgrades and safety-critical analog acquisition where supply simplicity and long-term parametric stability are non-negotiable.

Availability

AD574ASE/883B is available at Aetrix Electronics and suitable for avionics sensor interfaces, missile guidance telemetry, ruggedized test equipment, and nuclear plant monitoring requiring stable component supply across extended lifecycle commitments.

Supply support for AD574ASE/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, founded in 1965 and headquartered in Wilmington, MA.

The AD574A product line was engineered for high-accuracy, self-contained data acquisition in harsh environments - targeting defense, aerospace, and industrial systems where external component count, long-term calibration stability, and extreme temperature operation are critical design constraints.

FAQ

What is the operating temperature range for the AD574ASE/883B?

The AD574ASE/883B is screened per MIL-STD-883B and operates over –55°C to +125°C. This range is validated through temperature cycling, burn-in, and parametric testing at extremes. Its ±1 LSB linearity and ±5 ppm/°C full-scale drift are guaranteed across this entire span - unlike commercial-grade AD574AK or AD574AL variants limited to 0°C to +70°C.

Does the AD574ASE/883B require an external reference voltage?

No, the AD574ASE/883B includes a temperature-compensated buried Zener reference generating 10.00 V ±0.2%. It can supply up to 1.5 mA to external circuitry, though buffering is recommended when operating from ±12 V supplies or driving variable loads. The AD574ASE/883B reference is integral to its self-contained architecture and eliminates external reference dependency.

How does the 12/8-mode pin affect data readout on the AD574ASE/883B?

The 12/8 pin on the AD574ASE/883B selects data format: tied to V_LOGIC, it enables 12-bit parallel output on DB0–DB11; tied to DIGITAL COMMON, it enables two 8-bit reads (MSBs first, then LSBs + trailing zeros). This pin is not TTL-compatible and must be hard-wired - incorrect biasing causes undefined output states and bus contention.

Can the AD574ASE/883B interface directly to an 8-bit microprocessor bus?

Yes, the AD574ASE/883B supports direct 8-bit bus interfacing using its 12/8-mode and AO pin. With 12/8 = DIGITAL COMMON and AO toggled, the MSB byte (DB8–DB11 + DB0–DB3) and LSB byte (DB4–DB7 + 0000) are delivered sequentially - eliminating need for external latches or bus transceivers in legacy 8080/Z80-based systems.

What is the purpose of the STS pin on the AD574ASE/883B?

The STS (Status) pin on the AD574ASE/883B is an open-collector output that goes high at conversion start and returns low upon completion. It provides hardware handshaking for interrupt-driven data capture, eliminates software polling overhead, and synchronizes external sample-and-hold release - ensuring deterministic timing critical in real-time control loops.