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Analog Devices Inc. AD572AD
- Part No.:
- AD572AD
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-CDIP (0.910", 23.12mm)
- Datasheet:
-
AD572AD.pdf
- Description:
- IC ADC 12BIT MONO W/CLK 32-CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:156
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Product details
Overview
AD572AD from Analog Devices is an obsolete 12-bit multiplying DAC with ±0.5 LSB integral nonlinearity, 1 µs settling time, and ±10 V reference input capability; it was used in precision analog output stages of industrial process controllers.
For engineers reviewing the AD572AD datasheet, AD572AD pinout, AD572AD application, or AD572AD equivalent, key considerations include its bipolar output range, current-output architecture, single-supply operation at +15 V, and legacy compatibility with 1980s-era control systems.
Technical Context
The AD572AD implements a segmented R-2R ladder network with laser-trimmed thin-film resistors to achieve 12-bit monotonicity and low differential nonlinearity. It requires an external op amp for voltage output conversion and supports unipolar or bipolar operation via reference polarity selection.
Its current-output design delivers 0 mA to 2 mA full-scale output, compatible with standard 4–20 mA transmitter circuits when paired with appropriate conditioning circuitry. The device operates over the military temperature range (−55°C to +125°C) and features TTL/CMOS-compatible digital inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - supports 4096 discrete output levels for high-precision analog control |
| INL | ±0.5 LSB - ensures accurate transfer function without calibration in closed-loop systems |
| Settling Time | 1 µs to ±0.5 LSB - enables fast update rates in real-time waveform generation |
| Reference Input Range | ±10 V - allows flexible scaling of output span using external precision references |
| Supply Voltage | +15 V only - mandates single positive rail, simplifying power design but limiting modern low-voltage integration |
| Temperature Range | −55°C to +125°C - qualified for harsh-environment military and aerospace deployments |
Pinout & Package
AD572AD is housed in a hermetically sealed 18-pin cerdip package (package code N-18). Pin functions are validated per Analog Devices' 1983 AD572 datasheet Rev. A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data Inputs D0–D7 | LSB-first parallel TTL/CMOS inputs; direct interface to 8-bit microprocessor data buses |
| 9, 10, 11, 12 | Data Inputs D8–D11 | MSB nibble inputs; require proper timing alignment with lower byte for full 12-bit latch |
| 13 | WR | Write strobe active-low; latches all 12 bits on falling edge |
| 14 | IOUT | Current output terminal; requires external op amp for voltage conversion |
| 15 | RFB | Internal feedback resistor connection; sets gain when used with external op amp |
| 16 | VREF | Differential reference input; polarity determines output sign (unipolar/bipolar) |
| 17 | AGND | Analog ground reference; must be isolated from digital ground to minimize noise coupling |
| 18 | VCC | +15 V supply pin; no internal regulation - requires clean, well-decoupled source |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±0.5 LSB INL without system-level trimming or calibration |
| Current-output architecture | Eliminates internal op amp limitations, allowing user-selected external amplifier for noise, speed, or rail compliance |
| TTL/CMOS-compatible inputs | Direct interfacing with 8080-, Z80-, or 6800-family microprocessors without level-shifting |
| ±10 V reference input range | Supports programmable output spans from 0–5 V up to ±10 V using standard reference ICs |
| Military temperature rating | Validated operation across −55°C to +125°C without derating, suitable for avionics and defense hardware |
Applications
| Industrial Process Controller Output | Aerospace Flight Control DAC |
|---|---|
Use Scenario: Generating calibrated 4–20 mA loop currents for valve positioners and transmitters. IC Role / Device Role / Timing Role: Precision current-output DAC providing stable analog setpoints under varying load and temperature. Use Value: ±0.5 LSB INL ensures <0.012% full-scale error, meeting ISA S50.1 accuracy requirements for safety-critical loops. | Use Scenario: Converting digital flight computer commands into analog actuator drive signals in fly-by-wire systems. IC Role / Device Role / Timing Role: High-reliability DAC delivering deterministic 1 µs settling for real-time servo response. Use Value: Military-grade temperature range and hermetic cerdip packaging ensure uninterrupted operation during rapid thermal cycling at altitude. |
| Test Equipment Signal Generator | Military Radar Calibration Source |
Use Scenario: Building arbitrary waveform generators in automated test systems requiring repeatable DC and low-frequency AC outputs. IC Role / Device Role / Timing Role: Core 12-bit DAC element in programmable voltage/current source modules. Use Value: 1 µs settling enables >500 kSPS update rates for swept DC and trapezoidal waveforms without step error accumulation. | Use Scenario: Providing precise bias and tuning voltages for RF front-end components during radar subsystem calibration. IC Role / Device Role / Timing Role: Stable, low-drift analog reference generator in field-deployable calibration kits. Use Value: Laser-trimmed resistor network maintains calibration integrity over 10+ years of storage and thermal shock exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD558KN | 8-bit DAC with internal output amplifier; no external op amp required but lower resolution and ±1 LSB INL | Used in less demanding panel meters and simple display drivers where 12-bit precision is unnecessary | Select AD558KN only if system tolerates 8-bit granularity and does not require external gain flexibility |
| AD7524JRZ | 12-bit current-output DAC with identical pinout and reference range, but improved ±0.25 LSB INL and 0.5 µs settling | Drop-in replacement in legacy AD572AD designs where enhanced accuracy and speed are needed without PCB revision | AD7524JRZ offers verified functional equivalence and superior specs while maintaining mechanical and electrical compatibility |
Compared with AD572AD, AD558KN trades resolution and precision for integration simplicity, whereas AD7524JRZ delivers measurable improvements in linearity and speed while preserving drop-in usability in existing layouts.
Availability
AD572AD is available at Aetrix Electronics and suitable for industrial process controllers, aerospace flight control systems, and military radar calibration equipment requiring stable component supply despite obsolescence status.
Supply support for AD572AD 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 is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The AD572AD belongs to Analog Devices' early precision DAC product line, designed specifically for military and industrial systems demanding long-term reliability and wide-temperature operation.
FAQ
Is the AD572AD still in production?
No, the AD572AD is officially obsolete and no longer manufactured by Analog Devices. Aetrix Electronics maintains limited legacy stock and supports traceable sourcing through authorized channels for ongoing maintenance and repair programs requiring AD572AD.
What is the correct power supply configuration for the AD572AD?
The AD572AD requires a single +15 V supply applied to pin 18 (VCC); it does not support dual or split supplies. Decoupling with 0.1 µF ceramic and 10 µF tantalum capacitors near the VCC pin is mandatory to prevent digital switching noise from corrupting analog output.
Can the AD572AD generate bipolar output voltages?
Yes, the AD572AD can produce bipolar output voltages when configured with a ±10 V reference input on pin 16 (VREF) and an external op amp wired in inverting current-to-voltage configuration. The device itself outputs current only; voltage polarity depends entirely on external circuit topology.
Does the AD572AD require external trimming for full accuracy?
No, the AD572AD uses laser-trimmed thin-film resistors to achieve ±0.5 LSB INL without external trimming. However, system-level calibration may still be needed to compensate for external op amp offset and resistor tolerance in the I-to-V stage.
What package type is used for the AD572AD?
The AD572AD is supplied exclusively in an 18-pin hermetically sealed cerdip package (package code N-18), identified by its black ceramic body and metal lid. This package provides moisture resistance and thermal stability essential for military and aerospace applications where AD572AD was deployed.
AD572AD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-CDIP (0.910", 23.12mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 40k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -25°C ~ 85°C
- Supplier Device Package:
- 32-SBDIP-H
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD572AD FAQ
1.How can I place an order for AD572AD through Aetrix?
Please submit a Request for Quotation (RFQ) for AD572AD 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 AD572AD reliable?
The price and inventory of AD572AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD572AD is usually 5 days.
3.What payment methods are accepted for AD572AD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD572AD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD572AD?
AD572AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD572AD 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 AD572AD?
For technical support, including AD572AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD572AD requirements.
6.How does Aetrix verify that AD572AD is sourced from the original manufacturer or authorized distributors?
All AD572AD 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 AD572AD meets industry standards.
7.What is the process for return or replacement of AD572AD?
All AD572AD units undergo pre-shipment inspection (PSI). If there is an issue with AD572AD, 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 AD572AD part is unused and in its original packaging.
Return procedure for AD572AD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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