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AD7894:  True Bipolar Input, 5 V Single Supply, 14-Bit, Serial 4.5 µs ADC in 8-Pin Package

Product Details


The AD7894 is a fast, 14-Bit Analog-to-Digital Converter that operates from a single +5 V supply and is housed in a small 8-pin SOIC. The part contains a 5 µs successive approximation A/D converter, an on-chip track/hold amplifier, an on-chip clock and a high speed serial interface. Output data from the AD7894 is provided via a high speed, serial interface port. This two-wire serial interface has a serial clock input and a serial data output with the external serial clock accessing the serial data from the part.

In addition to the traditional dc accuracy specifications such as linearity, full-scale and offset errors, the AD7894 is also specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio. The part accepts an analog input range of ±10 V (AD7894-10), ±2.5V (AD7894-3), 0 V to 2.5 V (AD7894-2), and operates from a single +5 V supply consuming only 20 mW typical.

The AD7894 features a high sampling rate mode and, for low power applications, a proprietary automatic power down mode where the part automatically goes into power down once conversion is complete and "wakes up" before the next conversion cycle. The part is available in a small outline IC (SOIC).

FEATURES and BENEFITS

  • Fast 14-Bit ADC with 5 µs Conversion Time
  • 8-Lead SOIC Package
  • Single 5 V Supply Operation
  • High Speed, Easy-to-Use, Serial Interface
  • On-Chip Track/Hold Amplifier
  • High Input Impedance
  • Selection of Input Ranges:
    ±10 V for AD7894-10
    ±2.5 V for AD7894-3
    0 V to +2.5 V for AD7894-2
  • Low Power: 20 mW Typ
  • Pin Compatible Upgrade of 12-Bit AD7895

Functional Block Diagram for AD7894

Documentation

Title Content Type File Type
AD7894: 5V, 14-Bit Serial, 5 us ADC in S0-8 Package Data Sheet  (Rev 0, 09/1998) (pdf, 131 kB) Data Sheets PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog  (pdf, 1885 kB)
8- to 18-Bit SAR ADCs with Sample Rates up to 3 MSPS -- The latest additions to ADI’s ADC portfolio offer unrivaled functionality in terms of channel count and power supply voltage, optimal power/speed ratios, and the smallest packages to meet the demands of any data acquisition application, including portable, industrial, medical, wireless, and communications.
Overview 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.

SampleSample & Buy

Price, packaging, availability

AD7894 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7894ACHIPS-10 Status: Production CHIPS OR DIE 0 Comm. Tray, 140 - $9.46 Y  Material Info Notify Me Purchase
AD7894AR-10 Status: Production 8 ld SOIC 8 Ind Tube, 98 $10.93 $9.30 N  Material Info PCN Purchase
AD7894AR-10REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $9.30 N  Material Info PCN Purchase
AD7894ARZ-10 Status: Production 8 ld SOIC 8 Ind Tube, 98 $9.46 $8.05 Y  Material Info PCN Purchase
AD7894ARZ-10REEL Status: Last Time Buy 8 ld SOIC 8 Ind Reel, 2500 - $8.05 Y  Material Info PCN/PDN Purchase
AD7894ARZ-10REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $8.05 Y  Material Info PCN Purchase
AD7894ARZ-2 Status: Production 8 ld SOIC 8 Ind Tube, 98 $9.93 $8.45 Y  Material Info PCN Purchase
AD7894ARZ-2REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $8.45 Y  Material Info PCN Purchase
AD7894ARZ-2REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $8.45 Y  Material Info PCN Purchase
AD7894ARZ-3 Status: Production 8 ld SOIC 8 Ind Tube, 98 $9.46 $8.05 Y  Material Info PCN Purchase Sample
AD7894ARZ-3REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $8.05 Y  Material Info PCN Purchase
AD7894ARZ-3REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $8.05 Y  Material Info PCN Purchase
AD7894BR-3REEL Status: Last Time Buy 8 ld SOIC 8 Ind Reel, 2500 - $12.88 N  Material Info PCN/PDN Purchase
AD7894BRZ-10 Status: Production 8 ld SOIC 8 Ind Tube, 98 $12.50 $10.63 Y  Material Info PCN Purchase Sample
AD7894BRZ-10REEL Status: Last Time Buy 8 ld SOIC 8 Ind Reel, 2500 - $10.63 Y  Material Info PCN/PDN Purchase
AD7894BRZ-10REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $10.63 Y  Material Info PCN Purchase
AD7894BRZ-3 Status: Production 8 ld SOIC 8 Ind Tube, 98 $12.50 $10.63 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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