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AD7859:  3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit, Parallel Sampling ADCs

Product Details

The AD7859/AD7859L are high speed, low power, 8-channel, 12-bit ADCs which operate from a single 3 V or 5 V power supply, the AD7859 being optimized for speed and the AD7859L for low power. The ADC contains self-calibration and system calibration options to ensure accurate operation over time and temperature and have a number of power-down options for low power applications.

The AD7859 is capable of 200 kHz throughput rate while the AD7859L is capable of 100 kHz throughput rate. The input track-and-hold acquires a signal in 500 ns and features a pseudo-differential sampling scheme. The AD7859 and AD7859L input voltage range is 0 to VREF (unipolar) and -VREF/2 to +VREF/2 about VREF/2 (bipolar) with both straight binary and 2s complement output coding respectively. Input signal range is to the supply and the part is capable of converting full-power signals to 100 kHz.

CMOS construction ensures low power dissipation of typically 5.4 mW for normal operation and 3.6 µW in power-down mode. The part is available in 44-pin, plastic quad flatpack package (PQFP) and plastic lead chip carrier (PLCC).


Low Power:

  • Normal Operation
    AD7859: 15 mW (VDD = 3 V)
    AD7859L: 5.5 mW (VDD = 3 V)
  • Using Automatic Power-Down After Conversion (25 µW)
    AD7859: 1.3 mW (VDD = 3 V 10 kSPS)
    AD7859L: 650 µW (VDD = 3 V 10 kSPS)
  • Specified for VDD of 3 V to 5.5 V
  • AD7859–200 kSPS
  • AD7859L–100 kSPS
  • System and Self-Calibration
  • Flexible Parallel Interface:
    16-Bit Parallel/8-Bit Parallel
  • 44-Pin PQFP and PLCC Packages

Functional Block Diagram for AD7859

AD7859 Diagram
Functional Block Diagram for AD7859


Title Content Type File Type
AD7859: 3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs Data Sheet (Rev A, 11/1996) (pdf, 535 kB) Data Sheets PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles 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

AD7859 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD7859APZ-REEL Status: Production 44 ld PLCC 44 Ind Reel, 500 - $7.43 Y  Material Info Notify Me Purchase
AD7859ASZ Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $8.77 $7.43 Y  Material Info PCN Purchase
AD7859ASZ-REEL Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Reel, 800 - $7.43 Y  Material Info PCN Purchase
AD7859BSZ Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $11.13 $9.46 Y  Material Info PCN Purchase
AD7859LASZ Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $7.99 $6.88 Y  Material Info PCN Purchase
AD7859LASZ-REEL Status: Production 44 ld MQFP (13.90mm wide) 44 Comm. Reel, 800 - $6.88 Y  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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