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

Analog Devices Inc. AD574ATD

Name: AD574ATD
Brand: Analog Devices Inc.
SKU: AD574ATD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD574ATD

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

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

Datasheet:: AD574ATD.pdf

Description:: IC ADC 12BIT SAR 28CDIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AD574ATD from Analog Devices is a monolithic 12-bit successive-approximation analog-to-digital converter (ADC) with on-chip reference, clock, and three-state data output buffers. 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 conversion time for full 12-bit resolution - used in high-reliability industrial control and aerospace data acquisition systems.

For engineers reviewing the AD574ATD datasheet, AD574ATD pinout, AD574ATD application, or AD574ATD equivalent, key selection criteria include guaranteed 12-bit no-missing-codes performance across military temperature range, internal 10.00 V ±0.2% Zener reference with 1.5 mA drive capability, and dual-mode (12/8-bit) parallel interface compatibility with 8-bit microprocessor buses.

Technical Context

The AD574ATD implements a fully self-contained successive-approximation architecture with integrated 12-bit current-output DAC, comparator, SAR, and reference. Its internal buried-Zener voltage reference ensures ±25 ppm/°C full-scale temperature coefficient and stable operation without external trimming resistors in many applications.

Control logic supports flexible interfacing: R/C and CE/CS jointly initiate conversion or enable data readout; AO selects MSB/LSB nibble access; 12/8 pin configures 12-bit parallel or two 8-bit byte outputs. STS provides real-time status signaling, and all digital inputs meet standard TTL voltage thresholds except 12/8, which must be hard-wired to VLOGIC or digital common.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	12-bit - delivers 4096 discrete digital codes with 2.44 mV LSB step size at 10 V span.
Linearity Error (T_MIN–T_MAX)	±1 LSB - guarantees monotonic transfer function and predictable code transitions across –55°C to +125°C.
No Missing Codes	12-bit - all 4096 codes appear in monotonic sequence over full temperature range, critical for closed-loop control fidelity.
Internal Reference	10.00 V ±0.2% - low-drift buried-Zener source enabling system-level calibration simplification and reduced BOM count.
Conversion Time	35 µs max (12-bit) - enables sampling of signals up to ~26 kHz when paired with AD585 sample-and-hold amplifier.
Supply Voltages	V_LOGIC = +4.5 V to +5.5 V; V_CC = +11.4 V to +16.5 V; V_EE = –11.4 V to –16.5 V - supports both ±12 V and ±15 V supply configurations.
Power Dissipation	725 mW max - requires thermal-aware PCB layout and decoupling per Analog Devices' recommended grounding scheme.

Pinout & Package

Ceramic DIP-28 (D-28) package - hermetically sealed, MIL-STD-883 qualified, rated for –65°C to +150°C storage and 175°C max chip temperature.

Pin/Terminal	Circuit Role	Design Meaning
1, 15	Digital Common (DC)	Reference ground for logic supplies and digital I/O; must be tied to analog common (Pin 9) at package for optimal noise rejection.
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13	DB11–DB0	Three-state parallel digital outputs - DB11 (MSB) to DB0 (LSB); configured as 12-bit word or split 8+4 nibbles based on AO and 12/8 states.
14	STS (Status)	Active-high conversion-in-progress flag - goes high at start, low at completion; used for polling or interrupt-driven read timing.
16	CE (Chip Enable)	Primary active-low control input - initiates conversion or enables data output when CS is low and R/C state is valid.
17	CS (Chip Select)	Secondary active-low enable - must be low with CE for any operation; slower than CE due to added propagation delay.
18	R/C (Read/Convert)	Level-sensitive mode selector - low = conversion start, high = data read; must be stable before CE assertion to avoid bus contention.
19	A0 (Address/Byte Select)	Selects data access mode - low = enable MSB nibble (DB11–DB8), high = enable LSB nibble (DB3–DB0) plus four trailing zeros in 8-bit mode.
20	12/8	Data format control - tied to VLOGIC for 12-bit parallel output, tied to DC for two 8-bit byte reads; not TTL-compatible.
21	REF OUT	10.00 V reference output - supplies internal DAC and external circuitry; limited to 1.5 mA constant load during conversion.
22	REF IN	Reference input - accepts external 10 V source or connects to REF OUT via 50 Ω resistor for full-scale calibration trim.
23	BIP OFF	Bipolar offset adjustment node - connected to REF OUT for ±5 V/±10 V operation; grounded for unipolar mode.
24	10VIN	Unipolar 10 V span analog input - 5 kΩ input impedance; used with 0 V to +10 V or ±5 V signals.
25	20VIN	Unipolar 20 V span analog input - 10 kΩ input impedance; used with 0 V to +20 V or ±10 V signals.
26	ANA COM (AC)	Analog common - primary ground reference for internal reference, comparator, and analog inputs; must be low-impedance and isolated from noisy digital returns.
27	V_EE	Negative analog supply - –11.4 V to –16.5 V; powers internal DAC, comparator, and reference circuitry.
28	V_CC	Positive analog supply - +11.4 V to +16.5 V; supplies same internal blocks as V_EE.

Key Features

Feature	Design Value
On-chip 10.00 V reference	Eliminates need for external precision reference IC or resistor divider network, reducing component count and board area.
Guaranteed 12-bit no-missing-codes	Ensures deterministic monotonic behavior across –55°C to +125°C - essential for servo control and feedback stability.
Configurable 12/8-bit parallel interface	Enables direct connection to both 8-bit and 16-bit microprocessor buses without glue logic or data latches.
Internal clock and SAR	Removes requirement for external clock generator or timing controller - simplifies system timing design and reduces jitter sensitivity.
Three-state output buffers	Allows direct multiplexing onto shared data buses without external transceivers or bus contention risk during read cycles.

Applications

Industrial Process Monitoring	Aerospace Telemetry Systems
Use Scenario: Continuous digitization of pressure, temperature, and flow sensor outputs in PLC-based control cabinets operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary ADC front-end converting conditioned 4–20 mA or ±10 V analog signals into 12-bit digital words for real-time PID loop execution. Use Value: ±1 LSB linearity and 12-bit no-missing-codes guarantee consistent control actuation across wide ambient temperature swings (–25°C to +70°C).	Use Scenario: High-integrity signal acquisition in flight data recorders and engine health monitoring units exposed to –55°C to +125°C thermal cycling. IC Role / Device Role / Timing Role: Radiation-tolerant, MIL-qualified ADC capturing vibration, acceleration, and fuel pressure waveforms with deterministic latency. Use Value: Ceramic DIP-28 packaging and guaranteed performance over military temperature range ensure long-term reliability without derating.
Test & Measurement Equipment	High-Voltage Energy Metering
Use Scenario: Modular data acquisition modules in benchtop oscilloscopes and automated test systems requiring sub-LSB accuracy and fast settling. IC Role / Device Role / Timing Role: Precision ADC core paired with AD585 sample-and-hold to achieve 12-bit accuracy at 26 kHz effective sampling rate. Use Value: 35 µs conversion time and internal reference enable calibrated measurements without external trimming in production calibration workflows.	Use Scenario: Digitizing isolated AC voltage and current transformer outputs in utility-grade smart meters with extended temperature and lifetime requirements. IC Role / Device Role / Timing Role: Isolated analog input stage ADC supporting ±10 V bipolar input range and high common-mode rejection via external op-amp conditioning. Use Value: Bipolar offset adjust and 10 kΩ 20VIN input impedance allow accurate scaling of high-voltage differential signals while maintaining 12-bit resolution.

Industrial Process Monitoring

Aerospace Telemetry Systems

Use Scenario: Continuous digitization of pressure, temperature, and flow sensor outputs in PLC-based control cabinets operating in harsh factory environments.

IC Role / Device Role / Timing Role: Primary ADC front-end converting conditioned 4–20 mA or ±10 V analog signals into 12-bit digital words for real-time PID loop execution.

Use Value: ±1 LSB linearity and 12-bit no-missing-codes guarantee consistent control actuation across wide ambient temperature swings (–25°C to +70°C).

Use Scenario: High-integrity signal acquisition in flight data recorders and engine health monitoring units exposed to –55°C to +125°C thermal cycling.

IC Role / Device Role / Timing Role: Radiation-tolerant, MIL-qualified ADC capturing vibration, acceleration, and fuel pressure waveforms with deterministic latency.

Use Value: Ceramic DIP-28 packaging and guaranteed performance over military temperature range ensure long-term reliability without derating.

Test & Measurement Equipment

High-Voltage Energy Metering

Use Scenario: Modular data acquisition modules in benchtop oscilloscopes and automated test systems requiring sub-LSB accuracy and fast settling.

IC Role / Device Role / Timing Role: Precision ADC core paired with AD585 sample-and-hold to achieve 12-bit accuracy at 26 kHz effective sampling rate.

Use Value: 35 µs conversion time and internal reference enable calibrated measurements without external trimming in production calibration workflows.

Use Scenario: Digitizing isolated AC voltage and current transformer outputs in utility-grade smart meters with extended temperature and lifetime requirements.

IC Role / Device Role / Timing Role: Isolated analog input stage ADC supporting ±10 V bipolar input range and high common-mode rejection via external op-amp conditioning.

Use Value: Bipolar offset adjust and 10 kΩ 20VIN input impedance allow accurate scaling of high-voltage differential signals while maintaining 12-bit resolution.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7874KP	12-bit, 10 µs conversion, serial SPI interface, no internal reference - requires external 10 V ref and clock.	Lower power (120 mW), smaller SOIC-28 package, but lacks parallel interface and on-chip timing - suited for space-constrained embedded designs with SPI host.	Select AD7874KP only if system uses SPI and can accommodate external reference; AD574ATD remains preferred for parallel bus integration and drop-in replacement in legacy designs.
MAX160BCCN+	12-bit, 25 µs conversion, ±5 V supply only, no internal reference, CMOS-compatible inputs - requires external 10 V ref and clock generation.	Military temp grade (–55°C to +125°C), plastic DIP-28, but higher full-scale error (±0.5% FS) and no guaranteed no-missing-codes spec.	Choose MAX160BCCN+ only for cost-sensitive programs where ±0.5% FS error is acceptable; AD574ATD provides superior linearity (±1 LSB) and guaranteed monotonicity.

Compared with AD7874KP and MAX160BCCN+, the AD574ATD uniquely combines military-temperature-rated ceramic DIP packaging, on-chip 10 V reference, parallel 12-bit interface, and guaranteed 12-bit no-missing-codes - making it irreplaceable in legacy avionics and industrial control upgrades requiring zero hardware redesign.

Availability

AD574ATD is available at Aetrix Electronics and suitable for industrial process monitoring, aerospace telemetry systems, test & measurement equipment, and high-voltage energy metering requiring stable component supply across extended temperature and long product lifecycles.

Supply support for AD574ATD 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 family was designed specifically for high-accuracy, high-reliability data acquisition in military, aerospace, and industrial environments where guaranteed linearity, temperature stability, and long-term calibration integrity are mandatory.

FAQ

What is the operating temperature range of the AD574ATD?

The AD574ATD is specified for continuous operation from –55°C to +125°C. This military-grade temperature range is validated per MIL-STD-883 screening and applies to all electrical parameters including linearity error, no-missing-codes guarantee, and reference stability. The ceramic DIP-28 package supports this range with a storage limit of –65°C to +150°C and maximum chip temperature of 175°C.

Does the AD574ATD require external components to operate?

The AD574ATD requires no external components for basic 12-bit conversion functionality - its internal clock, 10.00 V reference, and successive-approximation register are fully integrated. However, external passive components are needed for calibration (e.g., 50 Ω resistor between REF OUT and REF IN for full-scale trim) and analog input conditioning (e.g., op-amp driver for low-impedance source). Decoupling capacitors (4.7 µF tantalum + 0.1 µF ceramic per supply rail) are mandatory for stable operation.

How does the AD574ATD handle bipolar versus unipolar input ranges?

The AD574ATD supports both modes via dedicated pins: unipolar uses 10VIN (0 V to +10 V) or 20VIN (0 V to +20 V) referenced to ANA COM (Pin 26); bipolar uses the same pins but configures BIP OFF (Pin 23) to REF OUT for ±5 V or ±10 V spans. Input impedance is 5 kΩ for 10 V span and 10 kΩ for 20 V span. Offset and gain trims are performed separately for each mode using external potentiometers on Pins 12 and 10.

Can the AD574ATD interface directly with an 8-bit microprocessor bus?

Yes - the AD574ATD supports native 8-bit bus interfacing via its 12/8 pin (Pin 20) and AO pin (Pin 19). When 12/8 is tied to DIGITAL COMMON, the device outputs two 8-bit bytes: AO = 0 enables DB11–DB8 (MSB byte), AO = 1 enables DB3–DB0 followed by four trailing zeros (LSB byte). This eliminates need for external latches or data aligners in 8-bit systems such as Intel 8080 or Zilog Z80 architectures.

What is the purpose of the STS pin on the AD574ATD?

The STS (Status) pin (Pin 14) is an active-high, open-collector output that signals conversion progress: it goes high at the start of any conversion cycle (8-bit or 12-bit) and returns low upon completion. This pin enables polling-based or interrupt-driven data read timing - external logic must wait for STS to go low before asserting CE and R/C high to read output data, preventing bus contention and invalid reads.

AD574ATD 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:: -

AD574ATD FAQ

1.How can I place an order for AD574ATD through Aetrix?

Please submit a Request for Quotation (RFQ) for AD574ATD 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 AD574ATD reliable?

The price and inventory of AD574ATD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD574ATD is usually 5 days.

3.What payment methods are accepted for AD574ATD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD574ATD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD574ATD?

AD574ATD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD574ATD 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 AD574ATD?

For technical support, including AD574ATD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD574ATD requirements.

6.How does Aetrix verify that AD574ATD is sourced from the original manufacturer or authorized distributors?

All AD574ATD 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 AD574ATD meets industry standards.

7.What is the process for return or replacement of AD574ATD?

All AD574ATD units undergo pre-shipment inspection (PSI). If there is an issue with AD574ATD, 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 AD574ATD part is unused and in its original packaging.

Return procedure for AD574ATD:

1.Submit a request within 90 days.

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

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