Add to Signal Chain Designer

AD1671:  Complete 12-Bit 1.25 MSPS Monolithic A/D Converter

Product Details

The AD1671 is a monolithic 12-bit, 1.25 MSPS analog-to-digital converter with an on-board, high performance sample-and-hold amplifier (SHA) and voltage reference. The AD1671 guarantees no missing codes over the full operating temperature range. The combination of a merged high speed bipolar/ CMOS process and a novel architecture results in a combination of speed and power consumption far superior to previously available hybrid implementations. Additionally, the greater reliability of monolithic construction offers improved system reliability and lower costs than hybrid designs.

The fast settling input SHA is equally suited for both multiplexed systems that switch negative to positive full-scale voltage levels in successive channels and sampling inputs at frequencies up to and beyond the Nyquist rate. The AD1671 provides both reference output and reference input pins, allowing the on-board reference to serve as a system reference. An external reference can also be chosen to suit the dc accuracy and temperature drift requirements of the application.

The AD1671 uses a subranging flash conversion technique, with digital error correction for possible errors introduced in the first part of the conversion cycle. An on-chip timing generator provides strobe pulses for each of the four internal flash cycles. A single ENCODE pulse is used to control the converter. The digital output data is presented in twos complement or offset binary output format. An out-of-range signal indicates an overflow condition. It can be used with the most significant bit to determine low or high overflow.

The performance of the AD1671 is made possible by using high speed, low noise bipolar circuitry in the linear sections and low power CMOS for the logic sections. Analog Devices' ABCMOS-1 process provides both high speed bipolar and 2-micron CMOS devices on a single chip. Laser trimmed thin-film resistors are used to provide accuracy and temperature stability.

The AD1671 is available in two performance grades and three temperature ranges. The AD1671J and K grades are available over the 0°C to +70°C temperature range. The AD1671A grade is available over the -40°C to +85°C temperature range. The AD1671S grade is available over the -55°C to +125°C temperature range.


  • Conversion Time: 800 ns
  • 1.25 MHz Throughput Rate
  • Complete: On-Chip Sample-and-Hold Amplifier and Voltage Reference
  • Low Power Dissipation: 570 mW
  • No Missing Codes Guaranteed
  • Pin Configurable Input Voltage Ranges
  • Signal-to-Noise Plus Distortion Ratio
    fIN = 100 kHz: 70 dB
  • Twos Complement or Offset
    Binary Output Data
  • 28-Pin DIP and 28-Pin
    Surface Mount Package
  • Out of Range Indicator

Functional Block Diagram for AD1671


Title Content Type File Type
AD1671 Military Data Sheet  (Rev B, 08/1993) (pdf) Data Sheets PDF
AD1671: Complete 12-Bit 1.25 MSPS Monolithic A/D Converter Data Sheet  (Rev B, 10/1994) (pdf, 394 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
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.

SampleSample & Buy

Price, packaging, availability

AD1671 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
5962-9312601MXA Status: Production CERDIP GLASS SEAL 28 Mil Tube, 12 $418.82 $357.90 N  Material Info PCN Purchase
AD1671JP Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Tube, 39 $49.67 $42.32 N  Material Info PCN Purchase
AD1671JQ Status: Production CERDIP GLASS SEAL 28 Comm. Tube, 12 $66.22 $56.29 N  Material Info PCN Purchase
AD1671KP Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Tube, 39 $90.30 $76.76 N  Material Info PCN Purchase
AD1671KQ Status: Production CERDIP GLASS SEAL 28 Comm. Tube, 12 $90.30 $76.76 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.

content here.
content here.

Review this Product