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Analog Devices Inc. AD571SD/883B
- Part No.:
- AD571SD/883B
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
AD571SD/883B.pdf
- Description:
- IC ADC 8BIT MONO W/CLOCK 18CDIP
- Quantity:
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Inventory:2,738
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Product details
Overview
AD571SD/883B from Analog Devices is a military-grade, 10-bit monolithic successive-approximation analog-to-digital converter (ADC) with internal reference, requiring no external components for full conversion functionality. It operates over –55°C to +125°C, supports unipolar (0 V to +10 V) and bipolar (–5 V to +5 V) input ranges, delivers ±1/2 LSB relative accuracy at TA = +25°C, and achieves 15 μs minimum conversion time. It is used in precision data acquisition systems within aerospace flight control and hardened instrumentation.
For engineers reviewing the AD571SD/883B datasheet, AD571SD/883B pinout, AD571SD/883B application, or AD571SD/883B equivalent, key selection considerations include its MIL-STD-883B qualified ceramic DIP package, dual-supply operation (+5 V / –15 V), 5 kΩ laser-trimmed thin-film input resistor, open-collector DATA READY output, and I²L SAR architecture with buried Zener reference stability.
Technical Context
The AD571SD/883B implements a 10-bit successive-approximation register (SAR) using I²L logic, directly sequencing a current-output DAC against the analog input via a 5 kΩ trimmed input resistor and comparator. Its temperature-compensated buried Zener reference ensures stable full-scale calibration across –55°C to +125°C, with guaranteed ±2 LSB full-scale error and ±1/2 LSB relative accuracy at +25°C.
Bipolar operation is enabled by leaving the BIPOLAR OFFSET pin open, injecting an MSB–½ LSB offset current into the comparator summing node to shift the transfer function from 0 V to +10 V (unipolar) to –5 V to +5 V (bipolar), producing true offset binary coding. The device features three-state digital outputs with active pull-ups (0.5 mA source) and open-collector DATA READY (6 kΩ internal pull-up).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - defines quantization step size of 9.766 mV in unipolar mode (10 V / 1024) |
| Relative Accuracy | ±1/2 LSB max at +25°C - ensures monotonicity and guarantees no missing codes |
| Conversion Time | 15 μs min - enables sampling rates up to ~66.7 kSPS in burst mode |
| Analog Input Range | Unipolar: 0 V to +10 V; Bipolar: –5 V to +5 V - selectable via BIPOLAR OFFSET pin state |
| Supply Voltage | V+ = +4.5 V to +7.0 V; V– = –12.0 V to –16.5 V - supports TTL- and CMOS-compatible logic interfacing |
| Operating Temperature | –55°C to +125°C - qualified per MIL-STD-883B, suitable for extended-environment avionics |
| Input Impedance | 3.0 kΩ to 7.0 kΩ - defined by laser-trimmed 5 kΩ thin-film resistor, enabling direct voltage-to-current conversion |
| Output Coding | Unipolar: Positive True Binary; Bipolar: Positive True Offset Binary - matches standard microprocessor data handling |
Pinout & Package
AD571SD/883B is housed in an 18-lead side-brazed ceramic dual in-line package (SBDIP, package code D-18), hermetically sealed and qualified to MIL-STD-883B for high-reliability applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 | BIT 1 (MSB) to BIT 10 (LSB) | Three-state digital output lines - present 10-bit result after conversion; high-impedance when BLK AND CONV is high |
| 11 | DATA READY (DR) | Open-collector status signal - active low upon conversion completion; requires external pull-up |
| 12 | BLK AND CONV | Active-low control input - initiates conversion when pulsed low; blanks outputs when high |
| 13 | ANALOG IN | Differential analog input node - accepts 0 V to +10 V (unipolar) or –5 V to +5 V (bipolar) via internal 5 kΩ resistor |
| 14 | V– | Negative supply rail - supplies –12 V to –16.5 V to internal DAC and reference circuitry |
| 15 | DIGITAL COM | Digital ground reference - return for V+, logic inputs, and output drivers; isolated from analog common |
| 16 | ANALOG COM | Analog ground reference - return for ANALOG IN and internal comparator; allows ±200 mV common-mode offset vs DIGITAL COM |
| 17 | BIPOLAR OFF | Bipolar offset control - shorted to DIGITAL COM for unipolar mode; left open for bipolar ±5 V range |
| 18 | V+ | Positive supply rail - supplies +4.5 V to +7.0 V; powers logic, SAR, and output buffers |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic 10-bit SAR ADC | Integrates DAC, comparator, SAR, reference, and output buffers - eliminates external timing or trimming components |
| Laser-trimmed 5 kΩ input resistor | Enables precise full-scale current matching to internal DAC; supports user fine-calibration via series trimmer |
| Buried Zener voltage reference | Provides <±25 ppm/°C full-scale drift over –55°C to +125°C - critical for stable gain in harsh environments |
| Separate analog/digital commons | Allows independent grounding paths with ±200 mV common-mode tolerance - reduces noise coupling in mixed-signal systems |
| I²L logic process | Delivers high noise immunity and low power consumption (7 mA on V+, 9–15 mA on V–) across military temperature range |
| MIL-STD-883B qualification | Includes screening for thermal shock, mechanical shock, vibration, and burn-in - meets Class B reliability requirements |
Applications
| Flight Control Sensor Interface | Hardened Test Equipment |
|---|---|
Use Scenario: Digitizing accelerometer and gyroscope outputs in fly-by-wire aircraft control units under extreme thermal cycling and EMI exposure. IC Role / Device Role / Timing Role: Primary A/D converter capturing analog feedback signals with deterministic 15–40 μs latency and guaranteed monotonicity. Use Value: ±1/2 LSB relative accuracy and –55°C to +125°C operation ensure closed-loop stability without recalibration across mission profiles. |
Use Scenario: High-precision DC voltage and current measurement in automated test equipment deployed in defense electronics manufacturing. IC Role / Device Role / Timing Role: Front-end digitizer for calibrated reference channels, operating with external zero/full-scale trims and bipolar offset support. Use Value: Laser-trimmed 5 kΩ input resistor and ±2 LSB full-scale calibration enable traceable 0.05% measurement uncertainty without factory adjustment. |
| Satellite Power Monitoring | Tactical Radios ADC Subsystem |
Use Scenario: Monitoring solar array voltage and battery bus current in LEO satellite power management units exposed to radiation and thermal vacuum. IC Role / Device Role / Timing Role: Radiation-tolerant ADC converting isolated analog telemetry with minimal external components and no volatile configuration. Use Value: Hermetic ceramic DIP package and MIL-STD-883B screening provide proven reliability in space-qualified subsystems with >10-year lifetime. |
Use Scenario: Converting IF signal levels and AGC voltages in software-defined radios operating in mobile battlefield environments. IC Role / Device Role / Timing Role: Low-latency, single-supply-compatible ADC supporting rapid channel switching and real-time gain control loops. Use Value: TTL- and CMOS-compatible logic thresholds (V+ = +5 V or +15 V) and open-collector DATA READY simplify interface to FPGA-based control logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD571KD | Commercial grade (0°C to +70°C); same pinout, specs, and architecture but non-MIL screened | Not qualified for extended temperature or shock/vibe environments; unsuitable for aerospace or defense deployment | Select only for lab prototypes or commercial industrial systems where MIL-STD-883B compliance is not required. |
| AD7572A | 12-bit SAR ADC with internal reference; requires external clock; different pinout (24-lead CERDIP); no bipolar offset pin | Higher resolution but longer conversion time (25 μs typ); lacks hardware-selectable bipolar mode and analog/digital common isolation | Choose when 12-bit resolution outweighs need for bipolar input flexibility and MIL-qualified packaging. |
Compared with AD571KD, AD571SD/883B provides guaranteed operation across –55°C to +125°C and MIL-STD-883B mechanical/environmental screening, while AD7572A trades bipolar simplicity and robustness for higher resolution and external timing dependency - making AD571SD/883B optimal for deterministic, ruggedized 10-bit acquisition.
Availability
AD571SD/883B is available at Aetrix Electronics and suitable for flight control sensor interfaces, hardened test equipment, satellite power monitoring, tactical radio subsystems, and radiation-tolerant instrumentation requiring stable component supply across extended temperature and long lifecycle programs.
Supply support for AD571SD/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 AD571 product line was designed specifically for high-reliability, component-minimized data acquisition in military, aerospace, and industrial systems where deterministic timing, temperature stability, and hermetic packaging are mandatory.
FAQ
What is the guaranteed operating temperature range for AD571SD/883B?
The AD571SD/883B is fully specified and tested over –55°C to +125°C per MIL-STD-883B requirements. This range is validated through temperature cycling, burn-in, and parametric testing at extremes, ensuring all electrical specifications-including ±1/2 LSB relative accuracy and 15 μs min conversion time-remain valid across the full span without derating.
Does AD571SD/883B require external components to operate as a complete ADC?
No. The AD571SD/883B integrates a 10-bit current-output DAC, I²L successive-approximation register, comparator, temperature-compensated buried Zener reference, and laser-trimmed 5 kΩ input resistor. Only power supplies (+5 V, –15 V), analog input signal, and BLK AND CONV control pulse are needed for full functionality-no external clock, sample-hold, or calibration resistors are mandatory.
How is bipolar input range configured on AD571SD/883B?
Bipolar operation (–5 V to +5 V) on AD571SD/883B is enabled by leaving Pin 17 (BIPOLAR OFF) unconnected (open). This injects an MSB–½ LSB offset current into the comparator summing node, shifting the transfer function and producing offset binary output coding. For unipolar mode (0 V to +10 V), Pin 17 must be shorted to DIGITAL COM (Pin 15).
What is the purpose of separate ANALOG COM and DIGITAL COM pins on AD571SD/883B?
The separated analog and digital common pins on AD571SD/883B allow independent grounding paths with up to ±200 mV common-mode voltage between them. This isolation prevents digital switching noise from corrupting analog measurements and accommodates system-level partitioning of analog and digital return currents-critical for achieving ±1/2 LSB accuracy in mixed-signal environments.
Is AD571SD/883B pin-compatible with other AD571 variants like AD571JD or AD571KD?
Yes. All AD571 variants-including AD571SD/883B, AD571JD, and AD571KD-share identical 18-lead SBDIP (D-18) pinout, electrical interface, and functional behavior. Differences are limited to temperature grading, screening level (MIL-STD-883B vs commercial), and packaging qualification-not pin assignment or signal definition.
AD571SD/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
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AD571SD/883B FAQ
1.How can I place an order for AD571SD/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD571SD/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 AD571SD/883B reliable?
The price and inventory of AD571SD/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD571SD/883B is usually 5 days.
3.What payment methods are accepted for AD571SD/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD571SD/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD571SD/883B?
AD571SD/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD571SD/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 AD571SD/883B?
For technical support, including AD571SD/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD571SD/883B requirements.
6.How does Aetrix verify that AD571SD/883B is sourced from the original manufacturer or authorized distributors?
All AD571SD/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 AD571SD/883B meets industry standards.
7.What is the process for return or replacement of AD571SD/883B?
All AD571SD/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD571SD/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 AD571SD/883B part is unused and in its original packaging.
Return procedure for AD571SD/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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