Add to Signal Chain Designer

AD7247:  Dual 12-Bit DACPORT with Parallel Load

Product Details


The AD7237A/AD7247A is an enhanced version of the industry standard AD7237/AD7247. Improvements include operation from 12 V to 15 V supplies, faster interface times and better reference variations with VDD . Additional features include faster settling times.

The AD7237A/AD7247A is a complete, dual, 12-bit, voltage output digital-to-analog converter with output amplifiers and Zener voltage reference on a monolithic CMOS chip. No external user trims are required to achieve full specified performance.

Both parts are microprocessor compatible, with high speed data latches and interface logic. The AD7247A accepts 12-bit parallel data which is loaded into the respective DAC latch using the WR input and a separate Chip Select input for each DAC. The AD7237A has a double buffered interface structure and an 8-bit wide data bus with data loaded to the respective input latch in two write operations. An asynchronous LDAC signal on the AD7237A updates the DAC latches and analog outputs.

A REF OUT/REF IN function is provided which allows either the on-chip 5 V reference or an external reference to be used as a reference voltage for the part. For single supply operation, two output ranges of 0 V to +5 V and 0 V to +10 V are available, while these two ranges plus an additional ±5 V range are available with dual supplies. The output amplifiers are capable of developing +10 V across a 2 k(ohm) load to GND.

The AD7237A/AD7247A is fabricated in Linear Compatible CMOS (LC2 MOS), an advanced, mixed technology process that combines precision bipolar circuits with low power CMOS logic. Both parts are available in a 24-pin, 0.3" wide plastic and hermetic dual-in-line package (DIP) and are also packaged in a 24-lead small outline (SOIC) package.

FEATURES and BENEFITS

  • Complete Dual 12-Bit DAC Comprising
    Two 12-Bit CMOS DACs
    On-Chip Voltage Reference
    Output Amplifiers
    Reference Buffer Amplifiers
  • Parallel Loading Structure: AD7247A
  • Improved AD7237/AD7247:
    12 V to 15 V Operation
    Faster Interface –30 ns typ Data Setup Time
  • (8+4) Loading Structure: AD7237A
  • Single or Dual Supply Operation
  • Low Power—165 mW typ in Single Supply

Functional Block Diagram for AD7247

AD7247 Diagram
Functional Block Diagram for AD7247

Documentation

Title Content Type File Type
AD7237A/AD7247A: Dual 12-Bit DACPORTs Data Sheet  (Rev 0, 09/2002) (pdf, 392 kB) Data Sheets PDF
AD7237/AD7247: LC2MOS Dual 12-Bit DACPORT Scanned Data Sheet (Rev A, 03/2000) (pdf, 1201 kB) Data Sheets PDF
AN-349: Keys to Longer Life for CMOS  (pdf, 89 kB)
Here's How CMOS Can be Protected Against Abuse
Application Notes PDF
AN-225: 12-Bit Voltage-Output DACs for Single-Supply 5V and 12V Systems  (pdf, 237 kB) Application Notes PDF
Digital to Analog Converters ICs Solutions Bulletin  (pdf) Solutions Bulletins 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

AD7247 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7247AACHIPS Status: Obsolete CHIPS OR DIE 0 Ind Tray, 45 - - Y  Material Info PCN Contact ADI
AD7247AAN Status: Production 24 ld PDIP 24 Ind Tube, 15 $20.77 $17.66 N  Material Info PCN Purchase
AD7247AANZ Status: Production 24 ld PDIP 24 Ind Tube, 15 $18.92 $16.09 Y  Material Info PCN Purchase
AD7247AAR Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $20.17 $17.14 N  Material Info PCN Purchase
AD7247AAR-REEL Status: Contact ADI 24 ld SOIC - Wide 24 Ind Reel, 1000 - - N  Material Info PCN/PDN Contact ADI
AD7247AAR-REEL7 Status: Production 24 ld SOIC - Wide 24 Ind Reel, 400 - $17.14 N  Material Info PCN Purchase
AD7247AARZ Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $18.37 $15.62 Y  Material Info PCN Purchase
AD7247AARZ-REEL Status: Production 24 ld SOIC - Wide 24 Ind Reel, 1000 - $15.62 Y  Material Info PCN Purchase
AD7247AARZ-REEL7 Status: Production 24 ld SOIC - Wide 24 Ind Reel, 400 - $15.62 Y  Material Info PCN Purchase
AD7247ABN Status: Production 24 ld PDIP 24 Ind Tube, 15 $24.37 $20.70 N  Material Info PCN Purchase
AD7247ABNZ Status: Production 24 ld PDIP 24 Ind Tube, 15 $22.19 $18.85 Y  Material Info PCN Purchase
AD7247ABR Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $23.67 $20.11 N  Material Info PCN Purchase
AD7247ABR-REEL Status: Production 24 ld SOIC - Wide 24 Ind Reel, 1000 - $20.11 N  Material Info PCN Purchase
AD7247ABRZ Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $21.56 $18.32 Y  Material Info PCN Purchase
AD7247ABRZ-REEL Status: Production 24 ld SOIC - Wide 24 Ind Reel, 1000 - $18.32 Y  Material Info PCN Purchase
AD7247AQ Status: Production CERDIP GLASS SEAL 24 Ind Tube, 15 $30.32 $30.32 N  Material Info PCN Purchase
AD7247ATQ Status: Production CERDIP GLASS SEAL 24 Mil Tube, 15 $116.86 $116.86 N  Material Info PCN Purchase
AD7247BQ Status: Production CERDIP GLASS SEAL 24 Ind Tube, 15 $33.24 $29.90 N  Material Info PCN Purchase
AD7247JN Status: Production 24 ld PDIP 24 Ind Tube, 15 $20.77 $17.66 N  Material Info PCN Purchase
AD7247JNZ Status: Production 24 ld PDIP 24 Ind Tube, 15 $18.92 $16.09 Y  Material Info PCN Purchase
AD7247JR Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $20.17 $17.14 N  Material Info PCN Purchase
AD7247JRZ Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $18.37 $15.62 Y  Material Info PCN Purchase
AD7247KNZ Status: Production 24 ld PDIP 24 Ind Tube, 15 $22.19 $18.85 Y  Material Info PCN Purchase
AD7247KR Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $23.67 $20.11 N  Material Info PCN Purchase
AD7247KRZ Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $21.56 $18.32 Y  Material Info PCN Purchase
AD7247SCHIPS Status: Contact ADI CHIPS OR DIE 0 Mil Tray, 45 $25.11 $25.11 Y  Material Info Notify Me Contact ADI
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.


沪ICP备09046653号
content here.
content here.

Review this Product

Close