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AD7865:  Fast, Low-Power, 4-Channel, Simultaneous Sampling, 14-bit ADC

Product Details


The AD7865 is a fast, low power, four-channel simultaneous sampling 14-bit A/D converter that operates from a single +5 V supply. The part contains a 2.5 µs successive approximation ADC, four track/hold amplifiers, 2.5 V reference, on chip clock oscillator, signal conditioning circuitry and a high speed parallel interface. The input signals on four channels are sampled simultaneously thus preserving the relative phase information of the signals on the four analog inputs. The part accepts analog input ranges of ±10 V, ±5 V or ±2.5 V. Overvoltage protection on the analog inputs for the part allows the input voltage to go to ±20 V without damaging the parts or affecting a conversion in progress.

FEATURES and BENEFITS

  • Fast (2.4 µs) 14-Bit ADC
  • Four Simultaneously Sampled Inputs
  • Four Track/Hold Amplifiers
  • 0.35 µs Track/Hold Acquisition Time
  • 2.4 µs Conversion Time per Channel
  • HW/SW Select of Channel Sequence for Conversion
  • Single Supply Operation
  • Low Power, 115 mW Typ
  • Selection of Input Ranges:
    ±10 V, ±5 V and ±2.5 V
    0 V to 5 V and 0 V to 2.5 V
  • High Speed Parallel Interface Allows Interfacing to 3 V Processors
  • Power Saving Mode, 15 µW Typ
  • Overvoltage Protection on Analog Inputs

Functional Block Diagram for AD7865

Documentation

Title Content Type File Type
AD7865: Four-Channel, Simultaneous Sampling, Fast, 14-Bit ADC Data Sheet (Rev B, 12/2000) (pdf, 210 kB) Data Sheets PDF
AN-354: Ask the Applications Engineer 1-Multi Troubles  (pdf, 160 kB)
Addresses problems often encountered with LOG Circuits, Time Division Analog Multiplexing, and ADC Power Strobing
Application Notes PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
High-Performance Multichannel Power-Line Monitoring with Simultaneous-Sampling ADCs
By Colm Slattery, Analog Devices, Inc. (Analog Dialogue, Vol. 41, January 2007)
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

AD7865 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7865ASZ-1 Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $17.10 $14.67 Y  Material Info PCN Purchase Sample
AD7865ASZ-1REEL Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Reel, 800 $17.10 $14.67 Y  Material Info PCN Purchase
AD7865ASZ-2 Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $17.10 $14.67 Y  Material Info PCN Purchase
AD7865ASZ-2REEL Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Reel, 800 $17.10 $14.67 Y  Material Info PCN Purchase
AD7865ASZ-3 Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $17.10 $14.67 Y  Material Info PCN Purchase Sample
AD7865ASZ-3REEL Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Reel, 800 $17.10 $14.67 Y  Material Info PCN Purchase
AD7865BSZ-1 Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $21.76 $18.17 Y  Material Info PCN Purchase Sample
AD7865BSZ-1REEL Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Reel, 800 $21.76 $18.17 Y  Material Info PCN Purchase
AD7865BSZ-2 Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $21.76 $18.17 Y  Material Info PCN Purchase
AD7865BSZ-3 Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $21.76 $18.17 Y  Material Info PCN Purchase Sample
AD7865BSZ-3REEL Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Reel, 800 $21.76 $18.17 Y  Material Info PCN Purchase
AD7865YSZ-1 Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $22.26 $18.82 Y  Material Info PCN Purchase
AD7865YSZ-2 Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $22.26 $18.82 Y  Material Info PCN Purchase
AD7865YSZ-3 Status: Production 44 ld MQFP (13.90mm wide) 44 Ind Tray, 96 $22.26 $18.82 Y  Material Info PCN Purchase Sample
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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