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

Analog Devices Inc. AD574ASD

Name: AD574ASD
Brand: Analog Devices Inc.
SKU: AD574ASD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD574ASD

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

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

Datasheet:: AD574ASD.pdf

Description:: IC ADC 12BIT SAR 28CDIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AD574ASD from Analog Devices is a monolithic 12-bit successive-approximation analog-to-digital converter (ADC) with on-chip reference, clock, and three-state data outputs. It delivers ±1 LSB linearity error over –55°C to +125°C, supports ±5 V/±10 V bipolar and 0–10 V/0–20 V unipolar input ranges, and achieves ≤35 µs full-scale conversion time. It is used in high-reliability data acquisition systems requiring guaranteed no-missing-codes performance at military temperature extremes.

For engineers reviewing the AD574ASD datasheet, AD574ASD pinout, AD574ASD application, or AD574ASD equivalent, this page provides verified technical context, validated pin functions, confirmed operating specifications across military-grade temperature range, and two field-proven alternative parts for ruggedized measurement systems.

Technical Context

The AD574ASD integrates a 12-bit current-output DAC, temperature-compensated buried Zener reference (10.00 V ±0.2%), comparator, successive-approximation register (SAR), and parallel output buffers - all in a single ceramic DIP-28 package. Its internal 5 kΩ/10 kΩ scaling resistors enable direct 10 V or 20 V span operation without external gain components.

Control logic supports both 12-bit and 8-bit conversion modes via AO and 12/8 pins, with STS status flag and CE/CS/R/C interface compatible with microprocessor buses. Conversion is initiated by asserting CE and CS while R/C = 0; data read occurs when R/C = 1, with nibble-selectable output enabled by AO and format controlled by 12/8 hardwired to VLOGIC or digital common.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	12-bit monotonic, with guaranteed no missing codes to 11 bits over full –55°C to +125°C range
Linearity Error (T_MIN–T_MAX)	±1 LSB - defines maximum deviation of any code from ideal transfer curve across military temperature range
Input Ranges	Bipolar: ±5 V or ±10 V; Unipolar: 0–10 V or 0–20 V - selectable via pin-strapped analog inputs (10VIN/20VIN)
Conversion Time	≤35 µs for 12-bit mode - determines minimum sampling period for dynamic signal capture without aliasing
Internal Reference	10.00 V ±0.2% with ±50 ppm/°C full-scale tempco - eliminates need for external precision reference in most applications
Power Supply Range	V_CC: +11.4 V to +16.5 V; V_EE: –11.4 V to –16.5 V; V_LOGIC: +4.5 V to +5.5 V - supports ±12 V or ±15 V system rails
Package	Ceramic DIP-28 (D-28) - qualified for extended temperature operation and hermetic reliability in harsh environments

Pinout & Package

Ceramic Dual-In-Line Package (D-28), 0.6-inch body width, 0.3-inch lead spacing, hermetically sealed for MIL-STD-883 compliance. Pin 1 identified by dot; pins numbered counterclockwise from top-left corner.

Pin/Terminal	Circuit Role	Design Meaning
1, 15	Digital Common (DC)	Reference ground for logic supplies and digital I/O; must be tied to system digital ground
9	Analog Common (AC)	High-fidelity reference ground for internal reference, DAC, and analog inputs; connect directly to system analog ground point
8, 10	REF OUT / REF IN	10 V reference output and input - enables external calibration loop; requires fixed 50 Ω resistor for full-scale trim
12	BIP OFF	Bipolar offset adjustment node - connected to 10 V reference for bipolar mode, grounded for unipolar mode
13, 14	10VIN / 20VIN	Dedicated analog input terminals - 10VIN accepts 0–10 V or ±5 V; 20VIN accepts 0–20 V or ±10 V
2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21	DB11–DB0	Three-state parallel digital outputs - MSB (DB11) to LSB (DB0); output format selected by 12/8 and AO pins
11	STS	Status flag - high during conversion, low when result ready; used for handshaking with host processor
22, 23, 24, 25	CE, CS, R/C, A0	Control inputs - CE/CS enable device; R/C selects convert/read; A0 selects high/low nibble or 12-bit mode
26	12/8	Data format select - hardwired to VLOGIC for 12-bit word, to DC for two 8-bit bytes; not TTL-compatible
27, 28	V_CC, V_EE	Analog power supplies - +12 V/+15 V and –12 V/–15 V; require local 4.7 µF + 0.1 µF decoupling to AC
14 (top row)	V_LOGIC	Digital supply - +5 V ±0.5 V; powers control logic and output buffers; decouple directly between Pin 1 and Pin 15

Key Features

Feature	Design Value
On-chip 10 V reference	Eliminates external reference IC and reduces BOM count; ±0.2% initial accuracy supports <10 LSB full-scale error without trimming
Guaranteed no missing codes	11-bit resolution maintained over –55°C to +125°C - ensures monotonicity in closed-loop control and servo feedback paths
Selectable 12-/8-bit conversion	Reduces conversion time to ≤24 µs for 8-bit mode - enables faster sampling of less critical channels in multi-channel DAQ systems
Flexible input range configuration	Hardware-selectable ±5 V, ±10 V, 0–10 V, or 0–20 V spans - avoids external op-amp gain stages and preserves SNR
MIL-qualified ceramic DIP package	Hermetic seal and extended temperature rating - suitable for avionics, downhole tools, and space-qualified instrumentation

Applications

Avionics Sensor Interface	Industrial Process Monitoring
Use Scenario: Digitizing pressure, temperature, and accelerometer signals in flight control computers under thermal shock and vibration. IC Role / Device Role / Timing Role: Primary ADC for analog sensor conditioning; performs 12-bit conversions synchronized to deterministic real-time scheduler. Use Value: ±1 LSB linearity and –55°C to +125°C operation ensure consistent quantization accuracy across environmental extremes without recalibration.	Use Scenario: High-accuracy monitoring of furnace thermocouple outputs and motor phase currents in PLC-based manufacturing lines. IC Role / Device Role / Timing Role: Standalone ADC interfaced to 8-bit microcontroller bus; uses 8-bit mode for fast response on auxiliary channels. Use Value: On-chip 10 V reference and internal scaling resistors eliminate external precision components, reducing calibration drift and long-term maintenance.
Downhole Oilfield Instrumentation	Military Radar Signal Conditioning
Use Scenario: Converting gamma-ray detector pulses and resistivity probe voltages inside drill-string telemetry modules exposed to >150°C ambient. IC Role / Device Role / Timing Role: Ruggedized front-end ADC; operates from ±12 V supplies with buffered reference to sustain accuracy under supply ripple. Use Value: Ceramic DIP-28 package and guaranteed 11-bit no-missing-codes behavior prevent data dropout during thermal transients in borehole environments.	Use Scenario: Capturing intermediate-frequency (IF) samples in airborne radar receivers requiring stable amplitude fidelity across wide temperature swings. IC Role / Device Role / Timing Role: Precision ADC in IF chain; leverages unipolar 0–10 V range and STS handshake for deterministic timing alignment. Use Value: ±50 ppm/°C full-scale tempco and internal matched thin-film resistors maintain amplitude linearity within ±0.1% over mission profile.

Avionics Sensor Interface

Industrial Process Monitoring

Use Scenario: Digitizing pressure, temperature, and accelerometer signals in flight control computers under thermal shock and vibration.

IC Role / Device Role / Timing Role: Primary ADC for analog sensor conditioning; performs 12-bit conversions synchronized to deterministic real-time scheduler.

Use Value: ±1 LSB linearity and –55°C to +125°C operation ensure consistent quantization accuracy across environmental extremes without recalibration.

Use Scenario: High-accuracy monitoring of furnace thermocouple outputs and motor phase currents in PLC-based manufacturing lines.

IC Role / Device Role / Timing Role: Standalone ADC interfaced to 8-bit microcontroller bus; uses 8-bit mode for fast response on auxiliary channels.

Use Value: On-chip 10 V reference and internal scaling resistors eliminate external precision components, reducing calibration drift and long-term maintenance.

Downhole Oilfield Instrumentation

Military Radar Signal Conditioning

Use Scenario: Converting gamma-ray detector pulses and resistivity probe voltages inside drill-string telemetry modules exposed to >150°C ambient.

IC Role / Device Role / Timing Role: Ruggedized front-end ADC; operates from ±12 V supplies with buffered reference to sustain accuracy under supply ripple.

Use Value: Ceramic DIP-28 package and guaranteed 11-bit no-missing-codes behavior prevent data dropout during thermal transients in borehole environments.

Use Scenario: Capturing intermediate-frequency (IF) samples in airborne radar receivers requiring stable amplitude fidelity across wide temperature swings.

IC Role / Device Role / Timing Role: Precision ADC in IF chain; leverages unipolar 0–10 V range and STS handshake for deterministic timing alignment.

Use Value: ±50 ppm/°C full-scale tempco and internal matched thin-film resistors maintain amplitude linearity within ±0.1% over mission profile.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7892BRZ	12-bit SAR ADC with serial SPI interface; no internal reference; requires external 2.5 V reference; 2.5 µs conversion time	Designed for low-power, space-constrained embedded systems; lacks parallel bus interface and bipolar input support	Choose for compact PCB layouts where serial interface suffices and external reference is already present
ADS8320U	16-bit SAR ADC with parallel/serial dual interface; internal reference optional; 4.5 µs conversion; 94 dB SNR	Higher resolution and speed, but plastic TSSOP-20 package; rated only to –40°C to +85°C	Choose when 16-bit resolution and sub-5 µs latency are required, and extended temperature is not mandatory

Compared with AD574ASD, AD7892BRZ offers faster conversion and smaller footprint but sacrifices military temperature capability and parallel bus compatibility; ADS8320U delivers higher resolution and SNR but lacks hermetic packaging and guaranteed no-missing-codes at extreme temperatures.

Availability

AD574ASD is available at Aetrix Electronics and suitable for avionics sensor interface, industrial process monitoring, and downhole oilfield instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD574ASD 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 designed for high-accuracy, standalone data acquisition in demanding environments - emphasizing integrated reference stability, guaranteed linearity over temperature, and robust parallel interfacing for real-time control systems.

FAQ

What is the operating temperature range of the AD574ASD?

The AD574ASD 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 AD574ASD maintains ±1 LSB linearity and 11-bit monotonicity across this full range, making it suitable for aerospace, defense, and downhole applications where ambient conditions exceed commercial limits.

Does the AD574ASD require external components to operate?

No, the AD574ASD requires no external components for basic 12-bit conversion functionality. It integrates a temperature-compensated 10 V reference, internal clock, 12-bit DAC, comparator, SAR logic, and three-state output buffers. Only power supplies (+5 V, +12/+15 V, –12/–15 V), analog input connections (10VIN or 20VIN), and digital control signals (CE, CS, R/C, AO, 12/8) are needed. External 50 Ω resistor is optional for full-scale calibration trim; offset trim resistors are optional for fine adjustment.

How does the AD574ASD handle bipolar versus unipolar input ranges?

The AD574ASD supports both modes via dedicated pins and internal resistor networks. For unipolar operation (0–10 V or 0–20 V), BIP OFF is grounded and analog signal is applied to 10VIN or 20VIN. For bipolar operation (±5 V or ±10 V), BIP OFF is connected to REF OUT (10 V), enabling the internal 10 kΩ offset resistor. Input impedance is 5 kΩ for 10VIN and 10 kΩ for 20VIN, with thin-film resistors trimmed for absolute calibration - eliminating need for external gain stages in most configurations.

What is the purpose of the 12/8 pin on the AD574ASD?

The 12/8 pin on the AD574ASD selects the data output format: when hardwired to VLOGIC, it enables 12-bit parallel output on DB11–DB0; when hardwired to digital common (Pin 15), it enables two 8-bit byte reads - high byte (DB11–DB4) on first access, low byte (DB3–DB0 plus four trailing zeros) on second. This pin is not TTL-compatible and must be directly tied to one of those two nodes; floating or logic-driven states will cause undefined behavior and potential bus contention.

Can the AD574ASD be used with ±12 V power supplies instead of ±15 V?

Yes, the AD574ASD supports ±12 V supplies per its Absolute Maximum Ratings and operating specifications. However, when using ±12 V, the internal reference output current capability drops due to reduced headroom; Analog Devices recommends buffering the REF OUT with an op amp (e.g., AD707) if external loads exceed 1 mA or if operation over full temperature range is required. The AD574ASD's power supply rejection specification (±1 LSB change in full-scale calibration) remains valid for ±12 V operation.

AD574ASD 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:: -

AD574ASD FAQ

1.How can I place an order for AD574ASD through Aetrix?

Please submit a Request for Quotation (RFQ) for AD574ASD 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 AD574ASD reliable?

The price and inventory of AD574ASD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD574ASD is usually 5 days.

3.What payment methods are accepted for AD574ASD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD574ASD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD574ASD?

AD574ASD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD574ASD 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 AD574ASD?

For technical support, including AD574ASD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD574ASD requirements.

6.How does Aetrix verify that AD574ASD is sourced from the original manufacturer or authorized distributors?

All AD574ASD 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 AD574ASD meets industry standards.

7.What is the process for return or replacement of AD574ASD?

All AD574ASD units undergo pre-shipment inspection (PSI). If there is an issue with AD574ASD, 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 AD574ASD part is unused and in its original packaging.

Return procedure for AD574ASD:

1.Submit a request within 90 days.

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

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