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AD7878:  CMOS, Complete 12-Bit, 100kHz Sampling ADC with DSP Interface

Product Details


The AD7878 is a fast, complete, 12-bit A/D converter with a versatile DSP interface consisting of an 8-word, first-in, first-out (FIFO) memory and associated control logic.

The FIFO memory allows up to eight samples to be digitized before the microprocessor is required to service the A/D converter. The eight words can then be read out of the FIFO at maximum microprocessor speed. A fast data access time of 41 ns allows direct interfacing to DSP processors and high speed 16-bit microprocessors.

An on-chip status/control register allows the user to program the effective length of the FIFO and contains the FIFO out of range, FIFO empty and FIFO word count information.

The analog input of the AD7878 has a bipolar range of ±3 V. The AD7878 can convert full power signals up to 50 kHz and is fully specified for dynamic parameters such as signal-to-noise ratio and harmonic distortion.

The AD7878 is fabricated in Linear Compatible CMOS (LC2 MOS), an advanced, mixed technology process that combines precision bipolar circuits with low power CMOS logic. The part is available in four package styles, 28-pin plastic and hermetic dual-in-line package (DIP), leadless ceramic chip carrier (LCCC) or plastic leaded chip carrier (PLCC).

FEATURES and BENEFITS

  • Complete ADC with DSP Interface, Comprising:
    - Track/Hold Amplifier with 2 µs Acquisition Time
    - 7 µs A/D Converter
    - 3 V Zener Reference
    - 8-Word FIFO and Interface Logic
  • Interfaces to High Speed DSP Processors, e.g., ADSP-2100, TMS32010, TMS32020
  • 72 dB SNR at 10 kHz Input Frequency
  • 41 ns max Data Access Time
  • Low Power, 60 mW typ

Functional Block Diagram for AD7878

Documentation

Title Content Type File Type
AD7878: CMOS, Complete 12-Bit, 100kHz Sampling ADC with DSP Interface Data Sheet  (Rev A, 05/1997) (pdf, 417 kB) Data Sheets PDF
AN-291: Asynchronous Clock Interfacing With the AD7878  (pdf, 137 kB) Application Notes 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.

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Price, packaging, availability

AD7878 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7878BQ Status: Production CERDIP GLASS SEAL 28 Ind Tube, 12 $75.20 $75.20 N  Material Info PCN Purchase
AD7878JNZ Status: Production 28 ld PDIP 28 Comm. Tube, 13 $50.24 $50.24 Y  Material Info PCN Purchase
AD7878JPZ-REEL Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Reel, 750 - $53.64 Y  Material Info Notify Me Purchase
AD7878KPZ-REEL Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Reel, 750 - $61.34 Y  Material Info Notify Me Purchase
AD7878LN Status: Last Time Buy 28 ld PDIP 28 Comm. Tube, 13 $58.13 $58.13 N  Material Info PDN Purchase
AD7878LPZ Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Tube, 39 $62.07 $62.07 Y  Material Info Notify Me Purchase
AD7878LPZ-REEL Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Reel, 750 - $62.07 Y  Material Info Notify Me Purchase
AD7878SE Status: Contact ADI LCC:CER LEADLESS CHIP CARR 28 Mil Tube, 42 $211.52 $191.22 N  Material Info PDN Contact ADI
AD7878SE/883B Status: Obsolete LCC:CER LEADLESS CHIP CARR 28 Mil Tube, 42 - - N  Material Info PCN/PDN Contact ADI
AD7878SQ Status: Production CERDIP GLASS SEAL 28 Mil Tube, 12 $197.42 $197.42 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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