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AD7871:  CMOS, Complete 14-Bit, Sampling ADC with Three Data Output Formats

Product Details


The AD7871 and AD7872 are fast, complete, 14-bit analog-to-digital converters. They consist of a track/hold amplifier, successive-approximation ADC, 3 V buried Zener reference and versatile interface logic. The ADC features a self-contained, laser trimmed internal clock, so no external clock timing components are required. The on-chip clock may be overridden to synchronize ADC operation to the digital system for minimum noise.

The AD7871 offers a choice of three data output formats: a single, parallel, 14-bit word; two 8-bit bytes or a 14-bit serial data stream. The AD7872 is a serial output device only. The two parts are capable of interfacing to all modern microprocessors and digital signal processors.

The AD7871 and AD7872 operate from ±5 V power supplies, accept bipolar input signals of ±3 V and can convert full power signals up to 41.5 kHz.

In addition to the traditional dc accuracy specifications, the AD7871 and AD7872 are also fully specified for dynamic performance parameters including distortion and signal-to-noise ratio.

Both devices are fabricated in Analog Devices’ LC2 MOS mixed technology process. The AD7871 is available in 28-pin plastic DIP and PLCC packages. The AD7872 is available in a 16-pin plastic DIP, hermetic DIP and 16-lead SOIC packages.

FEATURES and BENEFITS

  • Complete Monolithic 14-Bit ADC
  • 2s Complement Coding
  • Parallel, Byte and Serial Digital Interface
  • 80 dB SNR at 10 kHz Input Frequency
  • 57 ns Data Access Time
  • Low Power—50 mW typ
  • 83 kSPS Throughput Rate
  • 16-Lead SOIC (AD7872)

Functional Block Diagram for AD7871

Documentation

Title Content Type File Type
AD7871/AD7872: LC2MOS Complete 14-Bit, Sampling ADCs Data Sheet  (Rev D, 09/2002) (pdf, 344 kB) Data Sheets PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
Choosing High-Speed Signal Processing Components for Ultrasound Systems
(Analog Dialogue, Vol. 29, No. 2, 1995)
Analog Dialogue HTML
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

AD7871 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7871JN Status: Production 28 ld PDIP 28 Comm. Tube, 13 $52.26 $47.23 N  Material Info PCN Purchase
AD7871JNZ Status: Production 28 ld PDIP 28 Comm. Tube, 13 $47.61 $43.03 Y  Material Info PCN Purchase
AD7871JP Status: Obsolete PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Tube, 39 - - N  Material Info PCN/PDN Contact ADI
AD7871JP-REEL Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Reel, 750 - $41.77 N  Material Info PCN Purchase
AD7871JPZ Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Tube, 39 $46.21 $41.77 Y  Material Info PCN Purchase
AD7871JPZ-REEL Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Reel, 750 - $41.77 Y  Material Info PCN Purchase
AD7871KN Status: Obsolete 28 ld PDIP 28 Comm. Tube, 13 - - N  Material Info PCN/PDN Contact ADI
AD7871KNZ Status: Production 28 ld PDIP 28 Comm. Tube, 13 $58.89 $53.24 Y  Material Info PCN Purchase
AD7871KPZ Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Tube, 39 $54.46 $49.23 Y  Material Info PCN Purchase
AD7871TQ Status: Production CERDIP GLASS SEAL 28 Mil Tube, 12 $187.55 $187.55 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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