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AD570:  Complete 8-Bit Successive Approximation Analog-to-Digital Converter

Product Details

The AD570 is an 8-bit successive approximation A/D converter consisting of a DAC, voltage reference, clock, comparator, successive approximation register and output buffers-all fabricated on a single chip. No external components are required to perform a full accuracy 8-bit conversion in 25 µs.

The AD570 incorporates the most advanced integrated circuit design and processing technology available today. I2 L (integrated injection logic) processing in the fabrication of the SAR function along with laser trimming of the high stability SiCr thin-film resistor ladder network at the wafer stage (LWT) and a temperature compensated, subsurface Zener reference insures full 8-bit accuracy at low cost.

Operating on supplies of +5 V and -15 V, the AD570 accepts analog inputs of 0 V to +10 V unipolar of ±5 V bipolar, externally selectable. As the BLANK and CONVERT input is driven low, the three-state outputs go into the high impedance state and a conversion commences. Upon completion of the conversion, the DATA READY line goes low and the data appears at the output. Pulling the BLANK and CONVERT input high three states the outputs and readies the device for the next conversion. The AD570 executes a true 8-bit conversion with no missing codes in approximately 25 µs.

The AD570 is available in two versions; the AD570J is specified for the 0°C to +70°C temperature range, the AD570S for -55°C to +125°C. Both guarantee full 8-bit accuracy and no missing codes over their respective temperature ranges.


  1. The AD570 is a complete 8-bit A/D converter. No external components are required to perform a conversion. Full-scale calibration accuracy of ± 0.8% (2 LSB of 8 bits) is achieved without external trims.
  2. The AD570 is a single chip device employing the most advanced IC processing techniques. Thus, the user has at his disposal a truly precision component with the reliability and low cost inherent in monolithic construction.
  3. The AD570 accepts either unipolar (0 V to +10 V) or bipolar (–5 V to +5 V) analog inputs by grounding or opening a single pin.
  4. The device offers true 8-bit accuracy and exhibits no missing codes over its entire operating temperature range.
  5. Operation is guaranteed with –15 V and +5 V supplies. The device will also operate with a –12 V supply.
  6. The AD570S is also available processed to MIL-STD-883C, Class B. The military data sheet for the AD570SD/883B is included in the Analog Devices Military Products Databook.


  • Complete A/D Converter with Reference and Clock
  • Fast Successive Approximation Conversion: 25 µs
  • Digital Multiplexing: Three-State Outputs
  • 18-Pin Ceramic DIP
  • No Missing Codes Over Temperature
    0°C to +70°C: AD570J
    –55°C to +125°C: AD570S
  • Low Cost Monolithic Construction

Functional Block Diagram for AD570


Title Content Type File Type
AD570: Complete 8-Bit A-to-D Converter Datasheet (Rev B, 04/2012) (pdf, 312 kB) Data Sheets PDF
AN-348: Avoiding Passive-Component Pitfalls  (pdf, 931 kB)
The Wrong Passive Component Can Derail Even the Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.
Application Notes PDF
AN-271: Build Precise S/H Amps for Fast 12-Bit ADCs  (pdf, 415 kB) Application Notes PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
Space Qualified Parts List  (pdf, 93 kB)
This document lists 67 (240+) space level products that are available from Analog Devices. Many of the products listed are state-of-the-art data conversion and signal processing products that were previously only available as commercial or military Class B products. Through our Space Products Group and MIL-PRF-38535 certified Level V (Class S) facility, we are pleased to offer these products to the space marketplace.
Aerospace Information PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

AD570 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
5962-8680201VA Status: Production 18 ld Side-Brazed CerDIP 18 Mil Tube, 20 $181.76 $164.31 N  Material Info PCN Purchase
AD570JD Status: Production 18 ld Side-Brazed CerDIP 18 Comm. Tube, 20 $55.82 $50.46 N  Material Info PCN Purchase
AD570SD Status: Production 18 ld Side-Brazed CerDIP 18 Mil Tube, 20 $172.99 $156.39 N  Material Info PCN Purchase
AD570SD/883B Status: Production 18 ld Side-Brazed CerDIP 18 Mil Tube, 20 $190.86 $172.55 N  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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