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Analog Devices Inc. AD574AUE/883B
- Part No.:
- AD574AUE/883B
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-LCC
- Datasheet:
-
AD574AUE/883B.pdf
- Description:
- IC ADC 12BIT SAR 28LCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,463
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Product details
Overview
AD574AUE/883B from Analog Devices is a military-grade 12-bit monolithic successive-approximation analog-to-digital converter with internal 10 V reference, ±55°C to +125°C operating range, ±1 LSB linearity error over temperature, and 35 µs max 12-bit conversion time. It supports unipolar (0–10 V, 0–20 V) and bipolar (±5 V, ±10 V) input ranges and is used in precision data acquisition systems for avionics and ruggedized instrumentation.
For engineers reviewing the AD574AUE/883B datasheet, AD574AUE/883B pinout, AD574AUE/883B application, or AD574AUE/883B equivalent, key selection considerations include guaranteed no-missing-codes performance at 12 bits over full military temperature range, internal Zener reference stability (±12.5 ppm/°C full-scale T.C.), and compatibility with 8-bit or 12-bit parallel microprocessor buses via configurable AO and 12/8 control pins.
Technical Context
The AD574AUE/883B implements a fully self-contained successive-approximation architecture with on-chip 12-bit current-output DAC, comparator, SAR logic, and temperature-compensated buried-Zener 10.00 V ±0.02 V reference. Conversion is initiated by CE/CS/R/C control signals and yields left-justified parallel output via DB11–DB0.
It features dual-mode operation: 12-bit conversion (AO = 0) or accelerated 8-bit conversion (AO = 1), and flexible data readout-either 12-bit parallel (12/8 = VLOGIC) or two 8-bit nibbles (12/8 = DC). Input impedance is 5 kΩ (10 V span) or 10 kΩ (20 V span), requiring low-impedance drive or external sample-and-hold (e.g., AD585) for dynamic signals above 1.5 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit monotonic, with guaranteed no missing codes over full temperature range |
| Linearity Error (TMIN–TMAX) | ±1 LSB - ensures code transitions remain within 1 least-significant-bit deviation across –55°C to +125°C |
| Conversion Time | 35 µs max for 12-bit - defines minimum sampling interval for real-time systems |
| Reference Voltage | 10.00 V ±0.02 V - internally trimmed Zener source enabling absolute calibration without external reference |
| Input Ranges | Unipolar: 0–10 V or 0–20 V; Bipolar: ±5 V or ±10 V - selectable via pin-strapping, supporting industrial and military signal conditioning |
| Supply Voltages | VLOGIC = +4.5 V to +5.5 V; VCC = +11.4 V to +16.5 V; VEE = –11.4 V to –16.5 V - requires triple-rail supply for full specification compliance |
| Full-Scale Calibration Error | 0.125% of FS max - corresponds to ≤5 LSB error at 10 V span, trimmable via external 50 Ω resistor |
Pinout & Package
Ceramic DIP-28 (D-28) package with hermetic seal, qualified per MIL-STD-883B for high-reliability military/aerospace deployment. Pin layout optimized for analog-digital isolation: analog common (Pin 9) and digital common (Pin 15) are separate but intended to be joined at the package for optimal noise rejection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VLOGIC) | Digital supply input | Provides +5 V power to internal logic; must be decoupled directly to Pin 15 (DC) with 4.7 µF + 0.1 µF |
| Pin 8 (REF OUT) | 10 V reference output | Supplies up to 1.5 mA; load must remain constant during conversion to avoid gain error |
| Pin 9 (AC) | Analog common | Ground reference for internal reference and analog circuitry; primary low-noise return path |
| Pin 10 (REF IN) | Reference input | Accepts external reference or internal REF OUT; 50 Ω resistor enables full-scale calibration trim |
| Pin 12 (BIP OFF) | Bipolar offset adjustment | Connected to REF OUT for bipolar mode; grounded for unipolar; trimmable for ±4 LSB offset correction |
| Pin 13 (10VIN) | 10 V span analog input | 5 kΩ input impedance; used with AC (Pin 9) for 0–10 V or ±5 V operation |
| Pin 14 (20VIN) | 20 V span analog input | 10 kΩ input impedance; used with AC (Pin 9) for 0–20 V or ±10 V operation |
| Pin 15 (DC) | Digital common | Logic ground; joined to AC at package per best-practice grounding for mixed-signal integrity |
| Pins 16–27 (DB11–DB0) | Data outputs | Three-state parallel bus; output format (12-bit vs. two 8-bit words) controlled by 12/8 pin level |
| Pin 28 (STS) | Status output | Active-high during conversion; used for handshaking with microprocessor or DMA controller |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 10 V reference | Eliminates need for external precision reference; ±12.5 ppm/°C full-scale drift enables stable operation across –55°C to +125°C |
| Configurable 8-/12-bit conversion | Reduces latency to 10 µs for coarse measurements while retaining 12-bit accuracy when needed |
| Parallel interface with AO/12–8 control | Enables direct connection to 8-bit microcontrollers (e.g., 8080, Z80) without glue logic or bus transceivers |
| Guaranteed no missing codes (12-bit) | Ensures monotonicity critical for closed-loop control and servo applications where code inversion causes instability |
| MIL-STD-883B screening | Includes burn-in, temperature cycling, and hermeticity testing - required for flight-critical avionics and missile guidance systems |
Applications
| Avionics Sensor Interface | Missile Guidance ADC |
|---|---|
Use Scenario: Converting analog outputs from inertial measurement units (IMUs), pressure transducers, and temperature sensors in fighter jet flight control systems. IC Role / Device Role / Timing Role: Primary A/D converter capturing synchronized multi-channel sensor data at ≤20 kHz sample rate with deterministic 35 µs latency. Use Value: ±1 LSB linearity and MIL-qualified reliability ensure accurate position/state estimation under extreme vibration and thermal shock. | Use Scenario: Digitizing seeker head feedback signals and autopilot actuator currents in tactical missiles operating from –55°C launch to +125°C aerodynamic heating. IC Role / Device Role / Timing Role: High-stability ADC providing real-time telemetry and closed-loop correction with no missing codes across full temperature envelope. Use Value: Internal 10 V reference and ±12.5 ppm/°C full-scale T.C. maintain <0.05% gain drift, eliminating recalibration in sealed munitions. |
| Ruggedized Test Equipment | Nuclear Plant Monitoring |
Use Scenario: Embedded digitization in portable field test sets used for calibrating turbine sensors and generator protection relays in offshore oil platforms. IC Role / Device Role / Timing Role: Standalone ADC interfaced to 8-bit microcontroller for local data logging and alarm triggering on voltage/current anomalies. Use Value: Dual-range input (±10 V) and 12-bit resolution enable single-device coverage of both AC and DC monitoring channels. | Use Scenario: Continuous monitoring of neutron flux detectors and coolant loop thermocouples inside containment buildings with 40+ year service life requirements. IC Role / Device Role / Timing Role: Long-lifecycle ADC performing periodic diagnostics and safety-critical threshold comparisons without firmware updates. Use Value: Ceramic DIP-28 package and MIL-STD-883B qualification ensure radiation tolerance and zero infant mortality over decades of operation. |
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 |
|---|---|---|---|
| AD7896ARZ | Serial SPI interface, 100 kSPS, single +5 V supply, no internal reference | Lower power, PCB space-constrained designs; requires external reference and level-shifting for ±12 V analog inputs | Select for modern low-power embedded systems where serial interface and single-supply operation outweigh need for MIL qualification |
| ADS8505IPFB | 16-bit resolution, 250 kSPS, parallel/serial interface, ±5 V analog supply only | Higher precision metrology; incompatible with ±15 V analog signal chains without external level-shifting | Select when >12-bit resolution is mandatory and system can accommodate larger footprint and higher cost |
Compared with AD7896ARZ and ADS8505IPFB, the AD574AUE/883B uniquely combines military-grade reliability, integrated 10 V reference, triple-supply analog input support, and guaranteed 12-bit monotonicity - making it irreplaceable in legacy avionics upgrades and safety-critical analog front-ends where supply voltage headroom and long-term calibration stability are non-negotiable.
Availability
AD574AUE/883B is available at Aetrix Electronics and suitable for avionics sensor interfaces, missile guidance subsystems, ruggedized test equipment, and nuclear plant monitoring systems requiring stable component supply across extended product lifecycles.
Supply support for AD574AUE/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 belongs to Analog Devices' legacy precision data acquisition product line, designed specifically for high-reliability military, aerospace, and industrial applications demanding guaranteed monotonicity, wide temperature operation, and minimal external component count.
FAQ
What is the maximum operating temperature range for the AD574AUE/883B?
The AD574AUE/883B is screened and specified for operation from –55°C to +125°C per MIL-STD-883B, with all electrical parameters guaranteed across this full range. This includes ±1 LSB linearity error, 12-bit no-missing-codes performance, and ±12.5 ppm/°C full-scale temperature coefficient - verified through temperature cycling and parametric testing during qualification.
Does the AD574AUE/883B require external calibration components?
The AD574AUE/883B includes internal trimming for unipolar/bipolar offset and full-scale calibration, but external passive components are required for final system-level adjustment: a 50 Ω ±1% resistor between REF OUT (Pin 8) and REF IN (Pin 10) enables full-scale trim, and 100 kΩ potentiometers on Pins 12 (BIP OFF) and 13 (10VIN) allow offset calibration. No active components or DACs are needed.
Can the AD574AUE/883B interface directly with an 8-bit microprocessor bus?
Yes, the AD574AUE/883B supports direct 8-bit bus interfacing via its 12/8 and AO control pins: tie 12/8 to digital common (Pin 15) and use AO to select MSB nibble (AO = 0) or LSB nibble + trailing zeroes (AO = 1). This eliminates external latches or transceivers and is compatible with 8080, Z80, and 6800-family processors without timing modification.
What is the purpose of the STS pin on the AD574AUE/883B?
The STS (Status) pin on the AD574AUE/883B is an active-high open-collector output that goes high at conversion start and returns low upon completion. It provides hardware handshaking for microprocessors, DMA controllers, or FPGA state machines to avoid reading invalid data - essential for deterministic real-time acquisition in avionics and guidance systems where bus contention must be prevented.
Is an external sample-and-hold amplifier required when using the AD574AUE/883B?
An external sample-and-hold amplifier (SHA) is required for input signals changing faster than 1.5 Hz when using the full 10 V span, because the 35 µs conversion time allows ≤1/2 LSB change (1.22 mV) only within that window. For dynamic signals (e.g., vibration monitoring), Analog Devices recommends the AD585 SHA - its low droop and fast acquisition preserve 12-bit accuracy without adding latency beyond the conversion cycle.
AD574AUE/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-LCC
- Packaging:
- Bulk
- 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:
- 0:1
- 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-LCC (11.43x11.43)
- Mounting Type:
- Surface Mount
- Grade:
- Military
- Qualification:
- MIL-STD-883
AD574AUE/883B FAQ
1.How can I place an order for AD574AUE/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD574AUE/883B 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 AD574AUE/883B reliable?
The price and inventory of AD574AUE/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD574AUE/883B is usually 5 days.
3.What payment methods are accepted for AD574AUE/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD574AUE/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD574AUE/883B?
AD574AUE/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD574AUE/883B 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 AD574AUE/883B?
For technical support, including AD574AUE/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD574AUE/883B requirements.
6.How does Aetrix verify that AD574AUE/883B is sourced from the original manufacturer or authorized distributors?
All AD574AUE/883B 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 AD574AUE/883B meets industry standards.
7.What is the process for return or replacement of AD574AUE/883B?
All AD574AUE/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD574AUE/883B, 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 AD574AUE/883B part is unused and in its original packaging.
Return procedure for AD574AUE/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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