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Analog Devices Inc. AD570SD/883B
- Part No.:
- AD570SD/883B
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
AD570SD/883B.pdf
- Description:
- IC ADC 8BIT MONO W/CLOCK 18CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,331
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Product details
Overview
AD570SD/883B from Analog Devices is a military-grade 8-bit successive-approximation analog-to-digital converter (ADC) with internal current-output DAC, buried Zener reference, and TTL-compatible digital interface. It operates from +5 V and –15 V supplies, delivers ±1/2 LSB relative accuracy over –55°C to +125°C, supports unipolar (0 V to +10 V) and bipolar (–5 V to +5 V) input ranges, and achieves 25 µs typical conversion time - used in precision data acquisition within avionics and ruggedized test instrumentation.
For engineers reviewing the AD570SD/883B datasheet, AD570SD/883B pinout, AD570SD/883B application, or AD570SD/883B equivalent, key selection considerations include its MIL-STD-883B-certified SBDIP-18 package, ±2 LSB full-scale calibration error, 5 kΩ laser-trimmed input resistor, open-collector DATA READY output, and compatibility with microprocessor bus interfacing via BLANK & CONVERT control logic.
Technical Context
The AD570SD/883B implements an I²L-based successive-approximation register (SAR) architecture that sequences an internal 8-bit current-output DAC against the analog input current through a 5 kΩ thin-film input resistor. Its temperature-compensated buried Zener reference ensures stable full-scale and offset performance across –55°C to +125°C.
Bipolar operation is enabled by injecting a precise MSB–½LSB offset current into the comparator summing node when the BIPOLAR OFFSET pin is left open; unipolar mode requires shorting that pin to digital common. The device features open-drain DATA READY with external pull-up and three-state digital outputs controlled by the BLANK & CONVERT signal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - defines quantization step size of ~39.06 mV in 0 V to +10 V unipolar range. |
| Relative Accuracy | ±6½ LSB - guarantees monotonicity and limits code transition errors across full temperature range. |
| Conversion Time | 15–40 µs - enables sampling rates up to ~25 kSPS; typical 25 µs allows tight timing margins in real-time systems. |
| Analog Input Range | Unipolar: 0 V to +10 V; Bipolar: –5 V to +5 V - selectable via BIPOLAR OFFSET pin state, supporting both single- and dual-supply signal conditioning. |
| Power Supplies | V+ = +4.5 V to +7.0 V; V– = –12.0 V to –16.5 V - dual-rail operation required; –15 V nominal ensures specified linearity and offset stability. |
| Operating Current | V+: 7 mA; V–: 9–15 mA - total ~22 mW at –15 V/5 V, enabling low-power embedded measurement nodes. |
| Reference Type | Internal buried Zener - provides inherent temperature stability without external components or trimming. |
Pinout & Package
AD570SD/883B is housed in an 18-lead side-brazed ceramic dual in-line package (SBDIP-18, package option D-18), compliant with MIL-STD-883B screening for high-reliability applications. Lead finish is tin-lead, with 0.310 inch body width and 0.100 inch lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 | DIGITAL COMMON | Reference ground for TTL logic inputs and outputs; isolated from analog common to minimize digital noise coupling. |
| PIN 2–9 | BIT 1 (MSB) to BIT 8 (LSB) | Three-state CMOS/TTL-compatible digital outputs; active only after conversion completes and BLANK & CONVERT is high. |
| PIN 10 | DATA READY (DR) | Open-collector output; goes low at conversion completion to signal valid data; requires external pull-up resistor. |
| PIN 11 | ANALOG COMMON | Return path for analog input current; carries transient currents up to 2 mA during conversion; must be decoupled separately from DIGITAL COMMON. |
| PIN 12 | BIPOLAR OFFSET CONTROL | Logic-controlled switch node; open = bipolar mode (–5 V to +5 V); grounded = unipolar mode (0 V to +10 V). |
| PIN 13 | ANALOG IN | Current-input node referenced to ANALOG COMMON; accepts full-scale input via 5 kΩ trimmed resistor; max ±15 V absolute rating. |
| PIN 14 | V– | Negative supply rail; –12 V to –16.5 V operation; powers internal DAC and comparator circuitry. |
| PIN 15 | V+ | Positive supply rail; +4.5 V to +7.0 V operation; powers logic and reference sections. |
| PIN 16 | BLANK & CONVERT (B&C) | Active-low control input; falling edge initiates conversion; pulse width ≥2 µs required to clear previous data and start new cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed 5 kΩ input resistor | Enables ±2 LSB full-scale calibration error without external trimmer; supports 9.961 V nominal full-scale input. |
| Internal buried Zener reference | Eliminates need for external voltage reference; guarantees <100 ppm/°C full-scale drift over –55°C to +125°C. |
| Selectable unipolar/bipolar input range | Single-pin configuration (BIPOLAR OFFSET) changes transfer function between 0–10 V and –5–+5 V with offset binary coding. |
| Three-state digital outputs | Allows direct multiplexing of multiple AD570SD/883B devices on shared data buses without external bus transceivers. |
| MIL-STD-883B Class B screening | Includes temperature cycling, burn-in, and parametric testing per Method 5005 to ensure reliability in aerospace and defense platforms. |
Applications
| Avionics Sensor Interface | Ruggedized Test Equipment |
|---|---|
|
Use Scenario: Digitizing pressure, temperature, and inertial sensor outputs in flight control computers under extreme thermal and vibration conditions. IC Role / Device Role / Timing Role: Primary ADC capturing conditioned analog signals with deterministic 25 µs conversion latency and guaranteed monotonicity. Use Value: MIL-STD-883B qualification ensures operational integrity across –55°C to +125°C; buried Zener reference prevents calibration drift during extended missions. |
Use Scenario: High-accuracy voltage and current measurements in portable field calibrators used for instrument loop verification. IC Role / Device Role / Timing Role: Standalone 8-bit ADC interfaced directly to microcontroller via BLANK & CONVERT and DATA READY handshake. Use Value: Laser-trimmed input resistor and ±6½ LSB relative accuracy enable sub-0.2% end-to-end measurement uncertainty without factory recalibration. |
| Missile Guidance Signal Conditioning | Industrial Process Monitoring |
|
Use Scenario: Converting analog telemetry signals from gyros and accelerometers in guided munitions during launch and flight phases. IC Role / Device Role / Timing Role: Radiation-tolerant (per ADI's military product process) ADC operating from dual-rail supplies in compact, sealed modules. Use Value: SBDIP-18 ceramic package withstands shock >1000 g and hermetic sealing prevents moisture-induced parameter shift in humid environments. |
Use Scenario: Monitoring DC motor armature voltage and field current in blast furnace drive systems exposed to EMI and thermal cycling. IC Role / Device Role / Timing Role: Isolated ADC stage with separate analog/digital commons to reject ground-loop noise and common-mode transients. Use Value: ±200 mV allowed common-mode voltage between ANALOG COMMON and DIGITAL COMMON reduces need for complex isolation circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD571SD/883B | 10-bit resolution; identical pinout, timing, and package; requires same ±15 V/5 V supplies. | Higher resolution needed for 0.1% measurement accuracy; larger code space increases software overhead. | Select AD571SD/883B only if system-level accuracy demands <±0.1% FS error; retains same PCB layout and firmware interface. |
| MAX160SD/883B | 8-bit, but uses switched-capacitor SAR; single +5 V supply; no negative rail required; different pinout and control protocol. | Suitable for space-constrained designs where dual-supply generation is impractical; lacks buried Zener reference stability. | Choose MAX160SD/883B for low-voltage, low-power systems where ±15 V rail is unavailable; expect higher temperature coefficient and reduced long-term stability. |
Compared with AD570SD/883B, AD571SD/883B offers 2 extra bits at identical form-factor and supply requirements, while MAX160SD/883B trades dual-supply dependency and reference stability for single-rail simplicity and smaller footprint - making each alternative suitable only when those specific trade-offs align with system constraints.
Availability
AD570SD/883B is available at Aetrix Electronics and suitable for avionics sensor interface, ruggedized test equipment, missile guidance signal conditioning, and industrial process monitoring requiring stable component supply across extended temperature and lifecycle demands.
Supply support for AD570SD/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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The AD570SD/883B belongs to Analog Devices' military-grade data acquisition product line, designed specifically for high-reliability applications demanding guaranteed performance across extreme temperature, radiation, and mechanical stress environments.
FAQ
What is the operating temperature range for the AD570SD/883B?
The AD570SD/883B is rated for operation from –55°C to +125°C and is screened per MIL-STD-883B Method 5005 to ensure parametric stability and reliability across this full military temperature range. This specification applies to all electrical parameters listed in the datasheet, including relative accuracy, conversion time, and power supply rejection - confirmed on every production unit tested at final electrical test.
Does the AD570SD/883B require external calibration components?
The AD570SD/883B integrates a laser-trimmed 5 kΩ input resistor and a temperature-compensated buried Zener reference, eliminating the need for external calibration resistors or voltage references. Full-scale calibration error is guaranteed at ±2 LSB (±0.8%) without any external trimmer; optional fine adjustment can be added using a 200 Ω potentiometer in series with the analog input if sub-LSB accuracy is required in the AD570SD/883B design.
How is bipolar input range configured on the AD570SD/883B?
Bipolar operation (–5 V to +5 V input range) on the AD570SD/883B is enabled by leaving the BIPOLAR OFFSET pin (Pin 12) open-circuit, which injects a precise MSB–½LSB offset current into the comparator summing node. Unipolar mode (0 V to +10 V) is selected by connecting Pin 12 to DIGITAL COMMON. No external logic gates are required - the AD570SD/883B handles range selection internally based solely on this pin's DC state.
Can multiple AD570SD/883B devices share a common data bus?
Yes - the AD570SD/883B features three-state digital outputs controlled by the BLANK & CONVERT signal, allowing up to 10 units to be multiplexed on a single 8-bit data bus using a peripheral interface adapter like the MC6821 PIA. Only one AD570SD/883B is enabled at a time; others remain in high-impedance state, preventing bus contention and eliminating need for external bus transceivers in the AD570SD/883B system design.
What is the purpose of the DATA READY output on the AD570SD/883B?
The DATA READY (Pin 10) output on the AD570SD/883B is an open-collector signal that goes low within 25 µs of conversion completion to indicate valid data is present on the BIT 1–BIT 8 outputs. It enables synchronous readout in microprocessor systems - for example, polling DR before latching data or using it to automatically release a sample-hold amplifier (e.g., AD582) from hold mode. A pull-up resistor is required externally for proper logic-level operation of the AD570SD/883B.
AD570SD/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:
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- Input Type:
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- Data Interface:
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- Configuration:
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- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
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- Reference Type:
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- Voltage - Supply, Analog:
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- Voltage - Supply, Digital:
- -
- Features:
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- Operating Temperature:
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- Supplier Device Package:
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- Mounting Type:
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- Grade:
- -
- Qualification:
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AD570SD/883B FAQ
1.How can I place an order for AD570SD/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD570SD/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 AD570SD/883B reliable?
The price and inventory of AD570SD/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD570SD/883B is usually 5 days.
3.What payment methods are accepted for AD570SD/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD570SD/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD570SD/883B?
AD570SD/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD570SD/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 AD570SD/883B?
For technical support, including AD570SD/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD570SD/883B requirements.
6.How does Aetrix verify that AD570SD/883B is sourced from the original manufacturer or authorized distributors?
All AD570SD/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 AD570SD/883B meets industry standards.
7.What is the process for return or replacement of AD570SD/883B?
All AD570SD/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD570SD/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 AD570SD/883B part is unused and in its original packaging.
Return procedure for AD570SD/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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