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AD670:  8-Bit Signal Conditioning ADC.

Product Details

The AD670 is a complete 8-bit signal conditioning analog-to-digital converter. It consists of an instrumentation amplifier front end along with a DAC, comparator, successive approximation register (SAR), precision voltage reference, and a three-state output buffer on a single monolithic chip. No external components or user trims are required to interface, with full accuracy, an analog system to an 8-bit data bus. The AD670 will operate on the +5 V system supply. The input stage provides differential inputs with excellent common-mode rejection and allows direct interface to a variety of transducers.

The device is configured with input scaling resistors to permit two input ranges: 0 mV to 255 mV (1 mV/LSB) and 0 to 2.55 V (10 mV/LSB). The AD670 can be configured for both unipolar and bipolar inputs over these ranges. The differential inputs and common-mode rejection of this front end are useful in applications such as conversion of transducer signals superimposed on common-mode voltages.

The AD670 incorporates advanced circuit design and proven processing technology. The successive approximation function is implemented with I2L (integrated injection logic). Thin-film SiCr resistors provide the stability required to prevent missing codes over the entire operating temperature range while laser wafer trimming of the resistor ladder permits calibration of the device to within ±1 LSB. Thus, no user trims for gain or offset are required. Conversion time of the device is 10 µs.

The AD670 is available in four package types and five grades. The J and K grades are specified over 0°C to +70°C and come in 20-pin plastic DIP packages or 20-terminal PLCC packages. The A and B grades (-40°C to +85°C) and the S grade (-55°C to +125°C) come in 20-pin ceramic DIP packages.

The S grade is also available with optional processing to MIL-STD-883 in 20-pin ceramic DIP or 20-terminal LCC packages. The Analog Devices Military Products Databook should be consulted for detailed specifications.


  • Complete 8-Bit Signal Conditioning A/D Converter Including Instrumentation Amp and Reference
  • Microprocessor Bus Interface
  • 10 µs Conversion Speed
  • Flexible Input Stage: Instrumentation Amp Front End Provides Differential Inputs and High Common-Mode Rejection
  • No User Trims Required
  • No Missing Codes Over Temperature
  • Single +5 V Supply Operation
  • Convenient Input Ranges
  • 20-Pin DIP or Surface-Mount Package
  • Low Cost Monolithic Construction
  • MIL-STD-883B Compliant Versions Available

Functional Block Diagram for AD670

AD670 Diagram
Functional Block Diagram for AD670


Title Content Type File Type
AD670: Military Data Sheet  (Rev A, 01/2002) (pdf) Data Sheets PDF
AD670: Low Cost Signal Conditioning 8-Bit ADC Data Sheet  (Rev A, 04/2002) (pdf, 364 kB) Data Sheets PDF
AN-289: AD670 8-Bit A/D Converter Mates Transducers with Microprocessors  (pdf, 676 kB) Application Notes PDF
ADI Warns Against Misuse of COTS Integrated Circuits  (pdf, 13 kB)
(Revised 1/03)
Invites Customer Participation in Creative Mil/Aero System Solutions
Recommended Reading PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
PCN#00-406  (pdf, 14 kB)
Product Change notice for change of Analog Devices, Inc. Aerospace Product Line standard product from 883 Class S to MIL-PRF-38535, level V.
Aerospace Information PDF
Aerospace Dice  (pdf, 196 kB)
(Revised 1/2006)
Many Analog Devices products can be purchased as Class K die.
Aerospace Information PDF
Standard Space Level Products Program  (pdf, 39 kB)
This brochure describes the standard flow and how to order Analog Devices, Inc. standard product for Space Level not available as JAN, or QML. It replaces the Standard Class S brochure.
Aerospace Information 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

AD670 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
5962-8763501RA Status: Production S/B OR B/B CERAMIC DIP 20 Mil Tube, 19 $145.86 $131.86 N  Material Info PCN Purchase
AD670JN Status: Last Time Buy 20 ld PDIP 20 Comm. Tube, 18 $17.15 $15.50 N  Material Info PCN/PDN Purchase
AD670JNZ Status: Production 20 ld PDIP 20 Comm. Tube, 18 $14.87 $13.44 Y  Material Info PCN Purchase
AD670JPZ Status: Production PLCC:PLASTIC LEAD CHIP CAR 20 Comm. Tube, 49 $15.61 $14.11 Y  Material Info Notify Me Purchase
AD670JPZ-REEL7 Status: Last Time Buy PLCC:PLASTIC LEAD CHIP CAR 20 Comm. Reel, 250 - $14.11 Y  Material Info PDN Purchase
AD670KPZ Status: Production PLCC:PLASTIC LEAD CHIP CAR 20 Comm. Tube, 49 $20.41 $18.46 Y  Material Info Notify Me Purchase
AD670SD/883B Status: Production S/B OR B/B CERAMIC DIP 20 Mil Tube, 19 $146.17 $132.15 N  Material Info PCN Purchase
AD670SE/883B Status: Production LCC:CER LEADLESS CHIP CARR 20 Mil Tube, 54 $209.75 $189.62 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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