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AD7812:  10-Bit, 8-Channel, 350 kSPS, Serial A/D Converter

Product Details


The AD7811 and AD7812 are high speed, low power, 10-bit A/D converters that operate from a single 2.7 V to 5.5 V supply. The devices contain a 2.3 µs successive approximation A/D converter, an on-chip track/hold amplifier, a 2.5 V on-chip reference and a high speed serial interface that is compatible with the serial interfaces of most DSPs (Digital Signal Processors) and microcontrollers. The user also has the option of using an external reference by connecting it to the VREF pin and setting the EXTREF bit in the control register. The VREF pin may be tied to VDD. At slower throughput rates the power-down mode may be used to automatically power down between conversions.

The control registers of the AD7811 and AD7812 allow the input channels to be configured as single-ended or pseudo differential. The control register also features a software convert start and a software power-down. Two of these devices can share the same serial bus and may be individually addressed in a multipackage application by hardwiring the device address pin. The AD7811 is available in a small, 16-lead 0.3" wide, plastic dual-in-line package (mini-DIP), in a 16-lead 0.15" wide, small outline IC (SOIC) and in a 16-lead, Thin Shrink Small Outline Package (TSSOP). The AD7812 is available in a small, 20-lead 0.3" wide, plastic dual-in-line package (mini-DIP), in a 20-lead, small outline IC (SOIC) and in a 20-lead, Thin Shrink Small Outline Package (TSSOP).

FEATURES and BENEFITS

  • 10-Bit ADC with 2.3 µs Conversion Time
  • The AD7812 has Eight Single-Ended Inputs that Can Be Configured as Seven Pseudo Differential Inputs with Respect to a Common, or as Four Independent Pseudo Differential Channels
  • Onboard Track and Hold
  • Onboard Reference 2.5 V ± 2.5%
  • Operating Supply Range: 2.7 V to 5.5 V
  • Specifications at 2.7 V-3.6 V and 5 V ± 10%
  • DSP-/Microcontroller-Compatible Serial Interface
  • High Speed Sampling and Automatic Power-Down Modes
  • Package Address Pin on the AD7811 and AD7812 Allows
  • Sharing of Serial Bus in Multipackage Applications
  • Input Signal Range: 0 V to VREF
  • Reference Input Range: 1.2 V to VDD

Functional Block Diagram for AD7812

Documentation

Title Content Type File Type
AD7811/AD7812: +2.7 V to +5.5 V, 350 kSPS, 10-Bit 4-/8 Channel Sampling ADCs Data Sheet (Rev C, 03/2014) (pdf, 210 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

AD7812 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7812WYRUZ Status: Production 20 ld TSSOP 20 Ind Tube, 75 $4.91 $3.84 Y  Material Info PCN Purchase
AD7812WYRUZ-RL Status: Production TSSOP 4.4 MM 20 Ind Reel, 2500 - $3.84 Y  Material Info Notify Me Purchase
AD7812YNZ Status: Production 20 ld PDIP 20 Ind Tube, 18 $4.62 $3.61 Y  Material Info PCN Purchase
AD7812YRU Status: Production 20 ld TSSOP 20 Ind Tube, 75 $4.94 $3.85 N  Material Info PCN Purchase Sample
AD7812YRU-REEL7 Status: Production 20 ld TSSOP 20 Ind Reel, 1000 - $3.85 N  Material Info PCN Purchase
AD7812YRUZ Status: Production 20 ld TSSOP 20 Ind Tube, 75 $4.27 $3.34 Y  Material Info PCN Purchase Sample
AD7812YRUZ-REEL Status: Production 20 ld TSSOP 20 Ind Reel, 2500 - $3.34 Y  Material Info PCN Purchase
AD7812YRUZ-REEL7 Status: Production 20 ld TSSOP 20 Ind Reel, 1000 - $3.34 Y  Material Info PCN Purchase
AD7812YRZ Status: Production 20 ld SOIC - Wide 20 Ind Tube, 37 $4.27 $3.34 Y  Material Info PCN Purchase Sample
AD7812YRZ-REEL Status: Production 20 ld SOIC - Wide 20 Ind Reel, 1000 - $3.34 Y  Material Info PCN Purchase
AD7812YRZ-REEL7 Status: Production 20 ld SOIC - Wide 20 Ind Reel, 400 - $3.34 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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