My Inquiry
My Account
Analog Devices Inc. AD570SD
- Part No.:
- AD570SD
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 18-CDIP (0.300", 7.62mm)
- Datasheet:
-
AD570SD.pdf
- Description:
- IC ADC 8BIT SAR 18CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,260
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD570SD from Analog Devices is a military-grade, 8-bit successive-approximation analog-to-digital converter (ADC) with integrated current-output DAC, comparator, and temperature-compensated buried Zener reference. 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 systems for avionics and ruggedized instrumentation.
For engineers reviewing the AD570SD datasheet, AD570SD pinout, AD570SD application, or AD570SD equivalent, key selection considerations include its MIL-STD-883B qualified SBDIP-18 package, TTL-compatible logic inputs, open-collector DATA READY output, 3.0–7.0 kΩ analog input impedance, and dual-mode offset control for seamless unipolar/bipolar configuration.
Technical Context
The AD570SD implements an I²L-based successive-approximation register (SAR) architecture that sequences an internal 8-bit current-output DAC against the analog input via a high-gain comparator. Its laser-trimmed 5 kΩ thin-film input resistor enables full-scale calibration within ±2 LSB, while the buried Zener reference ensures <62 ppm/°C full-scale drift across temperature.
Control is managed through a single BLANK & CONVERT (B&C) line with precise timing: a minimum 2 µs pulse initiates conversion, DATA READY goes low after ~25 µs, and outputs become active within 500 ns - supporting both Convert Pulse Mode and Multiplex Mode for multi-channel systems without external latches.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - defines smallest resolvable analog step as 39.06 mV in 10 V full-scale unipolar mode. |
| Relative Accuracy | ±6½ LSB - guarantees monotonicity and end-point linearity error ≤ ±0.25% FS over full temperature range. |
| Conversion Time | 15–40 µs - determines maximum sampling rate of 25 kSPS (typical 25 µs), suitable for medium-speed acquisition. |
| Analog Input Range | Unipolar: 0 V to +10 V; Bipolar: –5 V to +5 V - selectable via BIPOLAR OFFSET pin, enabling direct sensor interface without external level-shifting. |
| Supply Voltages | V+ = +4.5 V to +7.0 V; V– = –12.0 V to –16.5 V - supports standard ±15 V rails with margin for supply variation and ripple. |
| Operating Current | V+: 7 mA; V–: 9–15 mA - total ~22 mW at ±15 V, enabling low-power operation in thermally constrained mil-aero modules. |
| Temperature Range | –55°C to +125°C - qualified per MIL-STD-883B, ensuring reliability in extended-environment flight control and engine monitoring systems. |
Pinout & Package
AD570SD is housed in an 18-lead Side-Brazed Ceramic Dual In-Line Package (SBDIP, D-18), hermetically sealed and qualified to MIL-STD-883B for high-reliability applications. The package features 0.310" × 0.220" body size, 0.100" lead pitch, and side-brazed metallization for superior thermal and mechanical stability under thermal cycling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 | DIGITAL COMMON | Reference ground for TTL logic inputs and outputs; must be isolated from analog common by ≤±200 mV common-mode voltage. |
| PIN 2–9 | BIT 1 (MSB) to BIT 8 (LSB) | Active-high TTL digital outputs - provide latched 8-bit parallel code after conversion; three-state when BLANK & CONVERT is high. |
| PIN 10 | DATA READY (DR) | Open-collector status signal - pulled low at conversion completion to indicate valid data on output bus. |
| PIN 11 | ANALOG COMMON | Return path for analog input current; sinks ~2 mA static current in unipolar mode; requires separate routing from DIGITAL COMMON. |
| PIN 12 | BIPOLAR OFFSET CONTROL | Logic-controlled switch - shorted to DIGITAL COMMON for unipolar mode; left open for bipolar ±5 V range with offset binary coding. |
| PIN 13 | ANALOG INPUT | Current-input node - accepts 0–2 mA full-scale signal via internal 5 kΩ laser-trimmed resistor; impedance 3.0–7.0 kΩ. |
| PIN 14 | V– | Negative supply rail - must be –12 V to –16.5 V; powers internal DAC, comparator, and reference circuitry. |
| PIN 15 | V+ | Positive supply rail - must be +4.5 V to +7.0 V; powers logic section and output buffers. |
| PIN 16 | BLANK & CONVERT (B&C) | Single TTL-compatible control input - low pulse ≥2 µs starts conversion; high state blanks outputs and resets SAR. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Zener Reference | Temperature-compensated buried Zener provides stable 10 V full-scale reference with <62 ppm/°C drift - eliminates need for external precision reference. |
| Laser-Trimmed Input Resistor | 5 kΩ thin-film resistor trimmed to match DAC full-scale current within ±0.3% - enables ±2 LSB calibration without external potentiometers in many applications. |
| Two-Mode Input Range | Hardware-selectable unipolar (0 V to +10 V) or bipolar (–5 V to +5 V) operation via single pin - simplifies system-level range switching without reconfiguration logic. |
| Three-State Outputs | 8-bit TTL-compatible outputs with high-impedance state during BLANK - allows direct multiplexing of up to 10 AD570SD units on shared data bus using PIA or discrete decoding. |
| MIL-STD-883B Qualification | Tested per Method 5005 for screening and Method 5006 for burn-in - ensures reliability in defense, aerospace, and downhole industrial deployments. |
Applications
| Avionics Sensor Interface | Engine Control Unit (ECU) Monitoring |
|---|---|
|
Use Scenario: Digitizing pressure, temperature, and position signals from turbine sensors in real-time flight control loops. IC Role / Device Role / Timing Role: Primary ADC capturing analog transducer outputs at 10–20 kSPS with deterministic 25 µs latency and guaranteed monotonicity. Use Value: ±6½ LSB relative accuracy and –55°C to +125°C operation ensure consistent resolution across altitude and ambient extremes without recalibration. |
Use Scenario: Acquiring throttle position, exhaust gas temperature, and manifold pressure in military diesel/gas turbine ECUs. IC Role / Device Role / Timing Role: Ruggedized front-end ADC interfacing directly to millivolt-level sensor bridges and thermocouples via bipolar offset mode. Use Value: Laser-trimmed 5 kΩ input resistor and integrated Zener reference eliminate external gain/offset components, reducing BOM count and failure points. |
| Ruggedized Data Acquisition | Missile Guidance Signal Conditioning |
|
Use Scenario: High-integrity logging of vibration, shock, and strain in armored vehicle health monitoring systems. IC Role / Device Role / Timing Role: Standalone 8-bit ADC operating in Convert Pulse Mode, synchronized to vehicle bus clock with minimal glue logic. Use Value: SBDIP-18 ceramic package withstands 2000g shock and 1000 thermal cycles - maintains parametric integrity where plastic packages fail. |
Use Scenario: Converting inertial measurement unit (IMU) analog outputs in tactical missile guidance electronics. IC Role / Device Role / Timing Role: Precision ADC embedded in radiation-hardened subsystems requiring deterministic timing and latch-free readout. Use Value: Open-collector DATA READY and three-state outputs enable clean handshaking with rad-tolerant microcontrollers without metastability risk. |
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 | 10-bit resolution, same SBDIP-18 package and MIL-STD-883B qualification; higher power (12 mA V+, 18 mA V–); 35 µs max conversion time. | Used where higher resolution is required without changing board layout; not drop-in due to different timing and drive strength. | Select AD571SD only if 10-bit resolution is mandatory and system timing budget allows 10 µs longer conversion. |
| MAX160SD | 8-bit, ±5 V supply only, no bipolar offset pin, CMOS output drivers, 12 µs conversion; not MIL-qualified; SOIC-16 package. | Suitable for commercial-grade portable test equipment; lacks analog common isolation and Zener reference stability. | Choose MAX160SD only for cost-sensitive, non-military applications where ±5 V supply and smaller footprint outweigh precision and ruggedness needs. |
Compared with AD570SD, AD571SD offers higher resolution but slower speed and greater power draw, while MAX160SD trades military reliability and analog flexibility for lower cost and smaller size - making AD570SD the optimal balance for high-stability, medium-speed, extended-temperature acquisition.
Availability
AD570SD is available at Aetrix Electronics and suitable for avionics sensor interface, engine control unit (ECU) monitoring, and ruggedized data acquisition requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for AD570SD 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 global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, aerospace, and industrial markets since 1965.
The AD570SD belongs to Analog Devices' legacy military-grade data converter family, designed specifically for high-reliability analog digitization in environments where temperature extremes, shock, and long-term parametric stability are critical.
FAQ
What is the operating temperature range of the AD570SD?
The AD570SD is specified for operation from –55°C to +125°C and is tested per MIL-STD-883B Method 5005. This extended range is achieved through hermetic SBDIP-18 packaging and internal temperature compensation of the buried Zener reference and DAC, ensuring stable performance in aircraft bays and engine compartments where ambient conditions exceed commercial limits. The AD570SD maintains ±6½ LSB relative accuracy across this full range.
How does the AD570SD handle unipolar versus bipolar input ranges?
The AD570SD selects between unipolar (0 V to +10 V) and bipolar (–5 V to +5 V) input ranges using the BIPOLAR OFFSET CONTROL pin (Pin 12). When shorted to DIGITAL COMMON, it configures unipolar mode with positive true binary coding; when left open, it enables bipolar mode with positive true offset binary coding. No external components are needed - the internal switch injects a precise offset current equal to MSB – ½ LSB into the comparator summing node, shifting the transfer function symmetrically.
Does the AD570SD require external calibration components?
The AD570SD includes a laser-trimmed 5 kΩ thin-film input resistor matched to its internal DAC, enabling ±2 LSB full-scale calibration without external trimmers in most applications. A simple 15 Ω series resistor at Pin 13 achieves nominal 10 V full scale; for tighter tolerance, a 200 Ω trimmer is recommended. The AD570SD's integrated temperature-compensated Zener reference further eliminates need for external voltage references or trimming networks.
What is the role of the DATA READY (DR) pin on the AD570SD?
The DATA READY (DR) pin (Pin 10) is an open-collector output that goes low within 25 µs of initiating conversion via the BLANK & CONVERT line, signaling valid data on the 8-bit output bus. It remains low until BLANK & CONVERT is returned high, then rises after ~1.5 µs. DR enables synchronous readout in microprocessor interfaces - for example, polling DR before latching data - and supports wire-ORing of multiple AD570SD units in multiplexed configurations without additional logic.
Can multiple AD570SD converters share a common data bus?
Yes - the AD570SD features three-state TTL-compatible digital outputs that enter high-impedance state when BLANK & CONVERT is high. This allows up to 10 AD570SD units to share an 8-bit data bus, controlled by individual select lines (e.g., via MC6821 PIA). Each device's DATA READY output can be wire-ORed to a single status line, enabling centralized conversion status monitoring. No external bus transceivers or latches are required, simplifying high-channel-count acquisition designs.
AD570SD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 18-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- +4.5V ~ 7V, -12V ~ 16.5V
- Voltage - Supply, Digital:
- +4.5V ~ 7V, -12V ~ 16.5V
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 18-SBDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD570SD FAQ
1.How can I place an order for AD570SD through Aetrix?
Please submit a Request for Quotation (RFQ) for AD570SD 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 reliable?
The price and inventory of AD570SD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD570SD is usually 5 days.
3.What payment methods are accepted for AD570SD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD570SD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD570SD?
AD570SD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD570SD 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?
For technical support, including AD570SD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD570SD requirements.
6.How does Aetrix verify that AD570SD is sourced from the original manufacturer or authorized distributors?
All AD570SD 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 meets industry standards.
7.What is the process for return or replacement of AD570SD?
All AD570SD units undergo pre-shipment inspection (PSI). If there is an issue with AD570SD, 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 part is unused and in its original packaging.
Return procedure for AD570SD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD570SD Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
