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AD7872:  CMOS, Complete 14-Bit Sampling ADC with Serial Output

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,

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 AD7872

AD7872 Diagram
Functional Block Diagram for AD7872

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
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

AD7872 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7872AN Status: Production 16 ld PDIP 16 Ind Tube, 25 $50.14 $45.59 N  Material Info PCN Purchase
AD7872ANZ Status: Production 16 ld PDIP 16 Ind Tube, 25 $45.68 $41.53 Y  Material Info PCN Purchase
AD7872AR Status: Last Time Buy 16 ld SOIC - Wide 16 Comm. Tube, 47 - - N  Material Info PDN Contact ADI
AD7872AR-REEL Status: Last Time Buy 16 ld SOIC - Wide 16 Comm. Reel, 1000 - - N  Material Info PDN Contact ADI
AD7872BR Status: Production 16 ld SOIC - Wide 16 Ind Tube, 47 $51.23 $39.61 N  Material Info PCN Purchase
AD7872BR-REEL Status: Last Time Buy 16 ld SOIC - Wide 16 Ind Reel, 1000 - $39.61 N  Material Info PCN/PDN Purchase
AD7872BRZ Status: Production 16 ld SOIC - Wide 16 Comm. Tube, 47 $44.45 $34.36 Y  Material Info PCN Purchase
AD7872BRZ-REEL Status: Production 16 ld SOIC - Wide 16 Comm. Reel, 1000 - $34.36 Y  Material Info PCN Purchase
AD7872JNZ Status: Production 16 ld PDIP 16 Comm. Tube, 25 $42.83 $31.15 Y  Material Info PCN Purchase
AD7872JR Status: Last Time Buy 16 ld SOIC - Wide 16 Comm. Tube, 47 $41.41 $30.10 N  Material Info PCN/PDN Purchase
AD7872JRZ Status: Production 16 ld SOIC - Wide 16 Comm. Tube, 47 $37.72 $27.43 Y  Material Info PCN Purchase
AD7872JRZ-REEL Status: Production 16 ld SOIC - Wide 16 Comm. Reel, 1000 - $27.43 Y  Material Info PCN Purchase
AD7872KN Status: Last Time Buy 16 ld PDIP 16 Comm. Tube, 25 $55.41 $42.83 N  Material Info PCN/PDN Purchase
AD7872KNZ Status: Production 16 ld PDIP 16 Comm. Tube, 25 $48.07 $37.16 Y  Material Info PCN Purchase
AD7872KRZ Status: Production 16 ld SOIC - Wide 16 Comm. Tube, 47 $44.45 $34.36 Y  Material Info PCN Purchase
AD7872KRZ-REEL Status: Production 16 ld SOIC - Wide 16 Comm. Reel, 1000 - $34.36 Y  Material Info PCN Purchase
AD7872TQ Status: Contact ADI 16 ld CerDIP 16 Mil Tube, 25 $144.22 $111.46 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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