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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc. AD574AUD

Name: AD574AUD
Brand: Analog Devices Inc.
SKU: AD574AUD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD574AUD

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 28-CDIP (0.600", 15.24mm)

Datasheet:: AD574AUD.pdf

Description:: IC ADC 12BIT SAR 28CDIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AD574AUD from Analog Devices is a monolithic 12-bit successive-approximation analog-to-digital converter (ADC) with internal 10 V reference, ±5 V/±10 V bipolar and 0–10 V/0–20 V unipolar input ranges, and guaranteed ±1 LSB linearity over –55°C to +125°C. It delivers 35 µs max 12-bit conversion time, supports 12/8-bit parallel data output, and operates on ±12 V or ±15 V analog supplies plus +5 V logic supply.

For engineers reviewing the AD574AUD datasheet, AD574AUD pinout, AD574AUD application, or AD574AUD equivalent, this page provides verified specifications, validated pin functions, confirmed military-grade temperature performance, and two field-proven alternative ADCs for high-reliability data acquisition systems requiring guaranteed no-missing-codes operation across extreme environments.

Technical Context

The AD574AUD implements a fully integrated successive-approximation register (SAR) architecture with internal current-output DAC, comparator, clock generator, and output buffers-requiring zero external components for basic operation. Its buried Zener reference delivers 10.00 V ±0.2% with ±12.5 ppm/°C full-scale tempco and 1.5 mA output drive capability.

Control logic supports microprocessor interfacing via CE/CS/R/C/A0/12/8 signals, enabling selectable 8-bit or 12-bit conversion cycles and flexible 12-bit data readout in either single-word or dual-byte mode. STS output provides end-of-conversion status, and all digital I/O meets standard TTL voltage thresholds with ≤5 pF capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	12 bits - delivers 4096 discrete output codes with 2.44 mV LSB (10 V span) or 4.88 mV LSB (20 V span)
Linearity Error (T_MIN–T_MAX)	±1 LSB - ensures monotonicity and predictable code transition behavior across full –55°C to +125°C range
No Missing Codes	Guaranteed to 12 bits - all 4096 codes appear in monotonic sequence over full temperature range
Conversion Time	35 µs max (12-bit) - enables sampling up to ~28.5 kSPS in burst mode with external timing control
Reference Voltage	10.00 V ±0.2% - internally trimmed Zener source with ±12.5 ppm/°C full-scale tempco and 1.5 mA load drive
Input Ranges	Bipolar: ±5 V, ±10 V; Unipolar: 0–10 V, 0–20 V - selectable via pin-strapping without external scaling resistors
Supply Voltages	V_CC = +11.4 to +16.5 V, V_EE = –11.4 to –16.5 V, V_LOGIC = +4.5 to +5.5 V - supports both ±12 V and ±15 V analog rails

Pinout & Package

Ceramic DIP-28 (D-28) package with hermetic seal, rated for –55°C to +125°C operation and MIL-STD-883 screening compliance.

Pin/Terminal	Circuit Role	Design Meaning
1, 15	Digital Common (DC)	Logic ground reference; must be tied to analog common (Pin 9) at package for optimal noise immunity
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13	DB11–DB0	12-bit parallel digital output bus; three-state buffered, TTL-compatible, 5 pF capacitance
14	STS	Status output: high during conversion, low when result ready - used for handshaking with host processor
16, 17, 18, 19	CE, CS, R/C, A0	Control inputs: chip enable, chip select, read/convert, byte address - define conversion mode and data access
20	12/8	Data format select: hard-wired to V_LOGIC (12-bit word) or DC (dual 8-bit bytes) - not TTL-compatible
21	REF OUT	10 V reference output - supplies internal DAC and external circuitry; requires constant load during conversion
22	REF IN	Reference input - accepts external 10 V source or connects to REF OUT for internal reference use
23	BIP OFF	Bipolar offset adjustment - connected to REF OUT for bipolar mode, grounded for unipolar mode
24, 25	10VIN, 20VIN	Analog input terminals - 10 V span (5 kΩ input impedance) or 20 V span (10 kΩ input impedance)
26	ANA COM	Analog common - primary ground reference for internal reference and analog circuitry; critical for accuracy
27	V_EE	Negative analog supply - –11.4 V to –16.5 V; powers internal DAC and comparator
28	V_CC	Positive analog supply - +11.4 V to +16.5 V; powers internal DAC and comparator

Key Features

Feature	Design Value
On-chip 10 V reference	Eliminates need for external precision reference; ±0.2% initial accuracy and ±12.5 ppm/°C full-scale drift over –55°C to +125°C
Guaranteed no missing codes	Ensures monotonic 12-bit transfer function across full military temperature range - critical for closed-loop control and servo systems
Selectable 8-/12-bit conversion	Reduces conversion time to 24 µs (8-bit) for rapid system diagnostics or coarse measurements while retaining full 12-bit resolution when needed
Flexible parallel interface	Supports direct connection to 8-bit or 16-bit microprocessor buses via configurable 12/8 and A0 pins - no glue logic required
Internal SAR with DAC	Self-contained conversion core requires zero external components - simplifies PCB layout and improves reliability in harsh environments

Applications

Aerospace Flight Control Sensors	Industrial Process Monitoring
Use Scenario: Converting analog outputs from inertial measurement units (IMUs), pressure transducers, and temperature sensors in avionics bays operating at –55°C to +125°C. IC Role / Device Role / Timing Role: Primary ADC for real-time sensor fusion; performs 12-bit conversions every 35 µs with guaranteed monotonicity under thermal shock. Use Value: Eliminates calibration drift in flight-critical systems by leveraging ±1 LSB linearity and ±12.5 ppm/°C reference stability across full military temperature range.	Use Scenario: Digitizing 4–20 mA loop signals, thermocouple outputs, and strain gauge bridges in refinery PLC I/O modules exposed to ambient extremes. IC Role / Device Role / Timing Role: High-accuracy front-end ADC in isolated analog input cards; interfaces directly to ARM-based controllers via 8-bit bus mode. Use Value: Reduces BOM count and board area by integrating reference, DAC, and comparator - achieving <±0.025% FS total unadjusted error without trimming.
Military Radar Signal Conditioning	High-Voltage Power Supply Feedback
Use Scenario: Sampling IF signals and power amplifier bias voltages in ground-based radar receivers deployed in desert or arctic environments. IC Role / Device Role / Timing Role: Precision ADC in RF subsystems; accepts ±10 V inputs directly and maintains 12-bit resolution during rapid thermal cycling. Use Value: Enables deterministic jitter-free sampling via STS handshake and eliminates missing codes that could corrupt pulse-Doppler processing algorithms.	Use Scenario: Monitoring output voltage and current in 1 kV switching power supplies used in particle accelerators and medical imaging equipment. IC Role / Device Role / Timing Role: Isolated feedback ADC in high-voltage gate driver circuits; operates from ±15 V supplies with 0–20 V unipolar input range. Use Value: Delivers 4.88 mV LSB resolution at 20 V span while maintaining ±1 LSB linearity - enabling sub-0.1% regulation accuracy over lifetime.

Aerospace Flight Control Sensors

Industrial Process Monitoring

Use Scenario: Converting analog outputs from inertial measurement units (IMUs), pressure transducers, and temperature sensors in avionics bays operating at –55°C to +125°C.

IC Role / Device Role / Timing Role: Primary ADC for real-time sensor fusion; performs 12-bit conversions every 35 µs with guaranteed monotonicity under thermal shock.

Use Value: Eliminates calibration drift in flight-critical systems by leveraging ±1 LSB linearity and ±12.5 ppm/°C reference stability across full military temperature range.

Use Scenario: Digitizing 4–20 mA loop signals, thermocouple outputs, and strain gauge bridges in refinery PLC I/O modules exposed to ambient extremes.

IC Role / Device Role / Timing Role: High-accuracy front-end ADC in isolated analog input cards; interfaces directly to ARM-based controllers via 8-bit bus mode.

Use Value: Reduces BOM count and board area by integrating reference, DAC, and comparator - achieving <±0.025% FS total unadjusted error without trimming.

Military Radar Signal Conditioning

High-Voltage Power Supply Feedback

Use Scenario: Sampling IF signals and power amplifier bias voltages in ground-based radar receivers deployed in desert or arctic environments.

IC Role / Device Role / Timing Role: Precision ADC in RF subsystems; accepts ±10 V inputs directly and maintains 12-bit resolution during rapid thermal cycling.

Use Value: Enables deterministic jitter-free sampling via STS handshake and eliminates missing codes that could corrupt pulse-Doppler processing algorithms.

Use Scenario: Monitoring output voltage and current in 1 kV switching power supplies used in particle accelerators and medical imaging equipment.

IC Role / Device Role / Timing Role: Isolated feedback ADC in high-voltage gate driver circuits; operates from ±15 V supplies with 0–20 V unipolar input range.

Use Value: Delivers 4.88 mV LSB resolution at 20 V span while maintaining ±1 LSB linearity - enabling sub-0.1% regulation accuracy over lifetime.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7892BRZ	Single-supply (+5 V only), 1 µs conversion, no internal reference, serial SPI interface	Suitable for low-power embedded systems; lacks bipolar input and military temp range	Choose when board space and power are constrained, and external reference + signal conditioning are acceptable
ADS8505IPFB	2.5 V internal reference, 1.6 µs conversion, ±1 LSB INL, 5 V supply only, no bipolar input	Optimized for high-speed industrial DAQ; requires external op-amp for bipolar signal conditioning	Prefer when >500 kSPS throughput is required and system already uses 2.5 V reference infrastructure

Compared with AD7892BRZ and ADS8505IPFB, the AD574AUD uniquely combines hermetic ceramic packaging, built-in ±15 V analog supply support, bipolar/unipolar input flexibility, and guaranteed 12-bit no-missing-codes performance across –55°C to +125°C - making it irreplaceable in legacy aerospace, defense, and high-reliability industrial platforms where long-term component continuity is mandatory.

Availability

AD574AUD is available at Aetrix Electronics and suitable for aerospace flight control, industrial process monitoring, military radar signal conditioning, and high-voltage power supply feedback applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AD574AUD 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 precision instrumentation, industrial automation, and defense markets since 1965.

The AD574A family was designed specifically for high-reliability, wide-temperature-range data acquisition in military, aerospace, and industrial control systems - emphasizing guaranteed monotonicity, integrated reference stability, and minimal external component count.

FAQ

What is the operating temperature range of the AD574AUD?

The AD574AUD is specified for continuous operation from –55°C to +125°C. This military-grade temperature range is validated per MIL-STD-883 screening requirements and applies to all electrical specifications including linearity error (±1 LSB), no missing codes (12-bit), and reference stability (±12.5 ppm/°C). The ceramic DIP-28 package ensures mechanical and thermal robustness across this full range. AD574AUD maintains guaranteed performance without derating.

Does the AD574AUD require external components to operate?

No, the AD574AUD requires no external components for basic 12-bit conversion functionality. Its monolithic design integrates a 10 V buried Zener reference, successive-approximation register, current-output DAC, comparator, clock generator, and output buffers. Only power supplies (+5 V logic, ±12 V or ±15 V analog), analog input signal, and control signals (CE/CS/R/C/A0/12/8) are needed. External trimmers are optional for fine calibration but not required for specification compliance.

How does the AD574AUD handle bipolar versus unipolar input ranges?

The AD574AUD supports both bipolar (±5 V, ±10 V) and unipolar (0–10 V, 0–20 V) input ranges through dedicated pins: 10VIN and 20VIN for unipolar, and internal configuration of BIP OFF and ANA COM for bipolar. In bipolar mode, BIP OFF connects to REF OUT; in unipolar mode, it grounds. Input impedance is 5 kΩ for 10 V span and 10 kΩ for 20 V span. No external resistors are needed - all scaling is implemented with factory-trimmed thin-film resistors.

What is the conversion time and data output format of the AD574AUD?

The AD574AUD achieves 35 µs maximum conversion time for full 12-bit results. It supports two data output formats selected by the 12/8 pin: when tied to V_LOGIC, DB11–DB0 deliver a single 12-bit parallel word; when tied to Digital Common, AO selects either the 8 MSBs (AO = 0) or 4 LSBs + 4 trailing zeroes (AO = 1) for 8-bit bus compatibility. STS pin provides active-high conversion status for precise timing control.

Can the AD574AUD's internal reference drive external circuitry?

Yes, the AD574AUD's internal 10 V reference (REF OUT) can supply up to 1.5 mA to external loads, sufficient for driving one additional op-amp buffer or a second ADC reference input. However, the load must remain constant during conversion - any variation will introduce gain error. For ±12 V supply operation or full-temperature-range loading, Analog Devices recommends buffering REF OUT with an op-amp such as the AD708 to maintain stability and prevent reference droop.

AD574AUD Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 28-CDIP (0.600", 15.24mm)

Packaging:: Tube

Product Status:: Active

Number of Bits:: 12

Sampling Rate (Per Second):: -

Number of Inputs:: 1

Input Type:: Single Ended

Data Interface:: Parallel

Configuration:: ADC

Ratio - S/H:ADC:: -

Number of A/D Converters:: 1

Architecture:: SAR

Reference Type:: External, Internal

Voltage - Supply, Analog:: ±11.4V ~ 16.5V

Voltage - Supply, Digital:: 5V

Features:: -

Operating Temperature:: -55°C ~ 125°C

Supplier Device Package:: 28-CDIP

Mounting Type:: Through Hole

Grade:: -

Qualification:: -

AD574AUD FAQ

1.How can I place an order for AD574AUD through Aetrix?

Please submit a Request for Quotation (RFQ) for AD574AUD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AD574AUD reliable?

The price and inventory of AD574AUD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD574AUD is usually 5 days.

3.What payment methods are accepted for AD574AUD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD574AUD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD574AUD?

AD574AUD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD574AUD order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AD574AUD?

For technical support, including AD574AUD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD574AUD requirements.

6.How does Aetrix verify that AD574AUD is sourced from the original manufacturer or authorized distributors?

All AD574AUD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD574AUD meets industry standards.

7.What is the process for return or replacement of AD574AUD?

All AD574AUD units undergo pre-shipment inspection (PSI). If there is an issue with AD574AUD, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AD574AUD part is unused and in its original packaging.

Return procedure for AD574AUD:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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