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AD7876:  CMOS, Complete 12-bit, 100 kHz, Sampling ADC with ±10V Input Signal Range

Product Details


The AD7870/AD7875/AD7876 is a fast, complete, 12-bit A/D converter. It consists of a track/hold amplifier, 8 µs successive approximation ADC, 3 V buried Zener reference and versatile interface logic. The ADC features a self-contained internal clock which is laser trimmed to guarantee accurate control of conversion time. No external clock timing components are required; the on-chip clock may he overridden by an external clock if required.

The parts offer a choice of three data output formats: a single, parallel, 12-bit word; two 8-bit bytes or serial data. Fast bus access times and standard control inputs ensure easy interfacing to modern microprocessors and digital signal processors.

All parts operate from ±5 V power supplies. The AD7870 and AD7876 accept input signal ranges of ±3 V and ±10 V, respectively, while the AD7875 accepts a unipolar 0 V to +5 V input range. The parts can convert full power signals up to 50 kHz.

The AD7870/AD7875/AD7876 feature dc accuracy specifications such as linearity, full-scale and offset error. In addition, the AD7870 and AD7875 are fully specified for dynamic performance parameters including distortion and signal-to-noise ratio.

The parts are available in a 24-pin, 0.3 inch-wide, plastic or hermetic dual-in-line package (DIP). The AD7870 and AD7875 are available in a 28-pin plastic leaded chip carrier (PLCC), while the AD7876 is available and in a 24-pin small outline (SOIC) package.

FEATURES and BENEFITS

  • Complete Monolithic 12-Bit ADC with:
    - 2 µs Track/Hold Amplifier
    - 8 µs A/D Converter
    - On-Chip Reference
    - Laser-Trimmed Clock
    - Parallel, Byte and Serial Digital Interface
  • 57 ns Data Access Time
  • 72 dB SNR at 10 kHz Input Frequency (AD7870, AD7875)
  • Low Power: –60 mW typ
  • Variety of Input Ranges:
    - ±3 V for AD7870
    - 0 V to +5 V for AD7875
    - ±10 V for AD7876

Functional Block Diagram for AD7876

Documentation

Title Content Type File Type
AD7870/AD7875/AD7876: LC2MOS Complete, 12-Bit, 100 kHz, Sampling ADCs Data Sheet  (Rev C, 02/2009) (pdf, 331 kB) Data Sheets PDF
AD7876: Military Data Sheet  (Rev B, 04/2002) (pdf) 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.

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Price, packaging, availability

AD7876 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
5962-9317901MLA Status: Production CERDIP GLASS SEAL 24 Comm. Tube, 15 $185.09 $167.32 N  Material Info PCN Purchase
AD7876BN Status: Production 24 ld PDIP 24 Ind Tube, 15 $31.66 $28.62 N  Material Info PCN Purchase
AD7876BNZ Status: Production 24 ld PDIP 24 Ind Tube, 15 $28.84 $26.06 Y  Material Info PCN Purchase
AD7876BR Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $30.73 $27.78 N  Material Info PCN Purchase
AD7876BR-REEL Status: Production 24 ld SOIC - Wide 24 Ind Reel, 1000 - $27.78 N  Material Info PCN Purchase
AD7876BR-REEL7 Status: Production 24 ld SOIC - Wide 24 Ind Reel, 400 $30.73 $27.78 N  Material Info PCN Purchase
AD7876BRZ Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $26.67 $24.11 Y  Material Info PCN Purchase
AD7876BRZ-REEL7 Status: Production 24 ld SOIC - Wide 24 Ind Reel, 400 - $24.11 Y  Material Info PCN Purchase
AD7876CNZ Status: Production 24 ld PDIP 24 Ind Tube, 15 $40.07 $36.21 Y  Material Info PCN Purchase
AD7876CR Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $40.68 $36.77 N  Material Info PCN Purchase
AD7876CR-REEL Status: Last Time Buy 24 ld SOIC - Wide 24 Ind Reel, 1000 $40.68 $36.77 N  Material Info PCN/PDN Purchase
AD7876CRZ Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $37.05 $33.49 Y  Material Info PCN Purchase
AD7876TQ Status: Production CERDIP GLASS SEAL 24 Mil Tube, 15 $138.21 $138.21 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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