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AD7851:  14-Bit, 333 kSPS, Serial Sampling A/D Converter

Product Details

The AD7851 is a high speed, 14-bit ADC which operate from a single 5V power supply. The ADC powers-up with a set of default conditions at which time it can be operated as a read-only ADC. The ADC contains self-calibration and system calibration options to ensure accurate operation over time and temperature and has a number of power down options for low power applications.

The AD7851 is capable of 272kHz throughput rate. The input track-and-hold acquires a signal in 0.33 µs and features a pseudo-differential sampling scheme. The AD7851 has the added advantage of two input voltage ranges ( 0 to VREF, and -VREF/2 to +VREF/2 centered about VREF/2). Input signal range is to VDD and the part is capable of converting full-power signals to 140 kHz.

CMOS construction ensures low power dissipation (60 mW typ) with power-down mode (5 µW typ). The part is available in 24- pin, 0.3 inch-wide dual-in-line package (DIP), 24 lead small outline (SOIC) and 24 lead small shrink outline (SSOP) packages.


  • 333 kSPS Throughput Rate/±2 LSB DNL—A Grade
  • 285 kSPS Throughput Rate/±1 LSB DNL—K Grade
  • A and K Grades Guaranteed to 125°C/238 kSPS Throughput Rate
  • Pseudo-Differential Input with Two Input Ranges
  • Read/Write Capability of Calibration Data
  • Single 5 V Supply
  • System and Self-Calibration with Autocalibration on Power-Up
  • Low Power: 60 mW Typ
  • Power-Down Mode: 5 µW Typ Power Consumption
  • Flexible Serial Interface: 8051/SPI®/QSPI™/µP Compatible
  • 24-Lead PDIP, SOIC, and SSOP Packages

Functional Block Diagram for AD7851


Title Content Type File Type
AD7851: 14-Bit 333 kSPS Serial A/D Converter Data Sheet  (Rev B, 03/2004) (pdf, 464 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

AD7851 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD7851ARSZ Status: Production 24 ld SSOP 24 Ind Tube, 59 $10.58 $9.01 Y  Material Info PCN Purchase
AD7851ARSZ-REEL Status: Production 24 ld SSOP 24 Ind Reel, 1500 - $9.01 Y  Material Info PCN Purchase
AD7851ARZ Status: Production 24 ld SOIC - Wide 24 Comm. Tube, 31 $10.58 $9.01 Y  Material Info PCN Purchase
AD7851ARZ-REEL Status: Production 24 ld SOIC - Wide 24 Comm. Reel, 1000 - $9.01 Y  Material Info PCN Purchase
AD7851KNZ Status: Contact ADI PLASTIC DIP 24 Comm. Tube, 15 $13.51 $11.50 Y  Material Info PCN Purchase
AD7851KRZ Status: Production 24 ld SOIC - Wide 24 Comm. Tube, 31 $13.13 $11.16 Y  Material Info PCN Purchase
AD7851KRZ-REEL Status: Production 24 ld SOIC - Wide 24 Comm. Reel, 1000 - $11.16 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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