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AD7863:  Simultaneous Sampling Dual 175 kSPS 14-Bit A/D Converter

Product Details


The AD7863 is a high speed, low power, dual 14-bit analog-to-digital converter that operates from a single 5 V supply.

The part contains two 5.2 μs successive approximation ADCs, two track/hold amplifiers, an internal 2.5 V reference and a high speed parallel interface. Four analog inputs are grouped into two channels (A and B) selected by the A0 input. Each channel has two inputs (VA1 and VA2 or VB1 and VB2) that can be sampled and converted simultaneously, thus preserving the relative phase information of the signals on both analog inputs. The part accepts an analog input range of ±10 V (AD7863-10), ±2.5 V (AD7863-3), and 0 V to 2.5 V (AD7863-2). Overvoltage protection on the analog inputs for the part allows the input voltage to go to ±17 V, ±7 V, or +7 V respectively, without causing damage.

A single conversion start signal (CONVST) simultaneously places both track/holds into hold and initiates conversion on both channels. The BUSY signal indicates the end of conversion and at this time the conversion results for both channels are available to be read. The first read after a conversion accesses the result from VA1 or VB1, and the second read accesses the result from VA2 or VB2, depending on whether the multiplexer select (A0) is low or high, respectively. Data is read from the part via a 14-bit parallel data bus with standard CS and RD signals. In addition to the traditional dc accuracy specifications such as linearity, gain, and offset errors, the part is also specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio.

The AD7863 is fabricated in the Analog Devices, Inc. linear compatible CMOS (LC2MOS) process, a mixed technology process that combines precision bipolar circuits with low power CMOS logic. It is available in 28-lead SOIC_W and SSOP.

Product Highlights

  1. The AD7863 features two complete ADC functions allowing simultaneous sampling and conversion of two channels. Each ADC has a two-channel input mux. The conversion result for both channels is available 5.2 μs after initiating conversion.
  2. The AD7863 operates from a single 5 V supply and consumes 70 mW typical. The automatic power-down mode, where the part goes into power-down once conversion is complete and wakes up before the next conversion cycle, makes the AD7863 ideal for battery-powered or portable applications.
  3. The part offers a high speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
  4. The part is offered in three versions with different analog input ranges. The AD7863-10 offers the standard industrial input range of ±10 V; the AD7863-3 offers the common signal processing input range of ±2.5 V, while the AD7863-2 can be used in unipolar 0 V to 2.5 V applications.
  5. The part features very tight aperture delay matching between the two input sample and hold amplifiers.

FEATURES and BENEFITS

  • Two fast 14-bit ADCs
  • Four input channels
  • Simultaneous sampling and conversion
  • 5.2 μs conversion time
  • Single supply operation
  • High speed parallel interface
  • Low power, 70 mW typical
  • Selection of input ranges
    ±10 V for AD7863-10
    ±2.5 V for AD7863-3
    0 V to 2.5 V for AD7863-2
  • Power saving mode, 105 μW maximum
  • Overvoltage protection on analog inputs
  • 14-bit lead compatible upgrade to AD7862

Functional Block Diagram for AD7863

Documentation

Title Content Type File Type
AD7863: Simultaneous Sampling Dual 175 kSPS 14-Bit ADC Data Sheet (Rev B, 12/2006) (pdf, 1054 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

AD7863 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7863AR-10 Status: Production 28 ld SOIC - Wide 28 Ind Tube, 27 $19.87 $16.95 N  Material Info PCN Purchase
AD7863AR-10REEL Status: Last Time Buy 28 ld SOIC - Wide 28 Ind Reel, 1000 - $16.95 N  Material Info PCN/PDN Purchase
AD7863AR-3 Status: Last Time Buy 28 ld SOIC - Wide 28 Ind Tube, 27 $19.87 $16.95 N  Material Info PCN/PDN Purchase
AD7863AR-3REEL Status: Last Time Buy 28 ld SOIC - Wide 28 Comm. Reel, 1000 - $16.95 N  Material Info PCN/PDN Purchase
AD7863AR-3REEL7 Status: Last Time Buy 28 ld SOIC - Wide 28 Comm. Reel, 400 - $16.95 N  Material Info PCN/PDN Purchase
AD7863ARS-10 Status: Last Time Buy 28 ld SSOP 28 Ind Tube, 47 $19.87 $16.95 N  Material Info PCN/PDN Purchase
AD7863ARS-10REEL7 Status: Obsolete 28 ld SSOP 28 Ind Reel, 500 - - N  Material Info PCN/PDN Contact ADI
AD7863ARS-2 Status: Production 28 ld SSOP 28 Ind Tube, 47 $19.87 $16.95 N  Material Info PCN Purchase
AD7863ARS-2REEL Status: Last Time Buy 28 ld SSOP 28 Ind Reel, 1500 - $16.95 N  Material Info PCN/PDN Purchase
AD7863ARS-2REEL7 Status: Production 28 ld SSOP 28 Ind Reel, 500 - $16.95 N  Material Info PCN Purchase
AD7863ARS-3 Status: Last Time Buy 28 ld SSOP 28 Ind Tube, 47 $19.87 $16.95 N  Material Info PCN/PDN Purchase
AD7863ARS-3REEL7 Status: Last Time Buy 28 ld SSOP 28 Ind Reel, 500 - $16.95 N  Material Info PCN/PDN Purchase
AD7863ARSZ-10 Status: Production 28 ld SSOP 28 Ind Tube, 47 $17.20 $14.67 Y  Material Info PCN Purchase
AD7863ARSZ-10REEL Status: Last Time Buy 28 ld SSOP 28 Ind Reel, 1500 - $14.67 Y  Material Info PCN/PDN Purchase
AD7863ARSZ-10REEL7 Status: Production 28 ld SOIC - Wide 28 Ind Reel, 500 - $14.67 Y  Material Info PCN Purchase
AD7863ARSZ-2 Status: Production 28 ld SSOP 28 Ind Tube, 47 $17.20 $14.67 Y  Material Info PCN Purchase
AD7863ARSZ-2REEL Status: Production 28 ld SSOP 28 Ind Reel, 1500 - $14.67 Y  Material Info PCN Purchase
AD7863ARSZ-2REEL7 Status: Production 28 ld SSOP 28 Ind Reel, 500 - $14.67 Y  Material Info PCN Purchase
AD7863ARSZ-3 Status: Production 28 ld SSOP 28 Ind Tube, 47 $17.20 $14.67 Y  Material Info PCN Purchase Sample
AD7863ARSZ-3REEL Status: Last Time Buy 28 ld SSOP 28 Ind Reel, 1500 - $14.67 Y  Material Info PCN/PDN Purchase
AD7863ARSZ-3REEL7 Status: Production 28 ld SSOP 28 Ind Reel, 500 - $14.67 Y  Material Info PCN Purchase
AD7863ARZ-10 Status: Production 28 ld SOIC - Wide 28 Ind Tube, 27 $17.20 $14.67 Y  Material Info PCN Purchase Sample
AD7863ARZ-10REEL7 Status: Production 28 ld SSOP 28 Comm. Reel, 400 - $14.67 Y  Material Info PCN Purchase
AD7863ARZ-2 Status: Production 28 ld SOIC - Wide 28 Ind Tube, 27 $17.20 $14.67 Y  Material Info PCN Purchase
AD7863ARZ-2REEL Status: Last Time Buy 28 ld SOIC - Wide 28 Comm. Reel, 1000 - $14.67 Y  Material Info PCN/PDN Purchase
AD7863ARZ-2REEL7 Status: Production 28 ld SOIC - Wide 28 Comm. Reel, 400 - $14.67 Y  Material Info PCN Purchase
AD7863ARZ-3 Status: Production 28 ld SOIC - Wide 28 Ind Tube, 27 $17.20 $14.67 Y  Material Info PCN Purchase Sample
AD7863BR-10 Status: Production 28 ld SOIC - Wide 28 Ind Tube, 27 $24.55 $20.87 N  Material Info PCN Purchase
AD7863BR-3 Status: Last Time Buy 28 ld SOIC - Wide 28 Ind Tube, 27 $24.55 $20.87 N  Material Info PCN/PDN Purchase
AD7863BRZ-10 Status: Production 28 ld SOIC - Wide 28 Ind Tube, 27 $21.25 $18.06 Y  Material Info PCN Purchase
AD7863BRZ-3 Status: Production 28 ld SOIC - Wide 28 Ind Tube, 27 $21.25 $18.06 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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