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AD7237:  Dual 12-Bit Complete DAC with Double Buffered Byte Loading

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: AD7247
  • (8 + 4) Loading Structure: AD7237
  • Single or Dual Supply Operation
  • Low Power - 165 mW typ in Single Supply

Functional Block Diagram for AD7237

AD7237 Diagram
Functional Block Diagram for AD7237

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

AD7237 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7237AAN Status: Production 24 ld PDIP 24 Ind Tube, 15 $20.18 $20.18 N  Material Info PCN Purchase
AD7237AAR Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $20.17 $17.14 N  Material Info PCN Purchase
AD7237AAR-REEL7 Status: Last Time Buy 24 ld SOIC - Wide 24 Ind Reel, 400 - $17.14 N  Material Info PCN/PDN Purchase
AD7237AARZ Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $18.37 $15.62 Y  Material Info PCN Purchase
AD7237AARZ-REEL Status: Production 24 ld SOIC - Wide 24 Ind Reel, 1000 - $15.62 Y  Material Info PCN Purchase
AD7237AARZ-REEL7 Status: Production 24 ld SOIC - Wide 24 Ind Reel, 400 - $15.62 Y  Material Info PCN Purchase
AD7237ABN Status: Production 24 ld PDIP 24 Ind Tube, 15 $23.68 $23.68 N  Material Info PCN Purchase
AD7237ABR Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $23.67 $20.11 N  Material Info PCN Purchase
AD7237ABRZ Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $21.56 $18.32 Y  Material Info PCN Purchase
AD7237ABRZ-REEL Status: Production 24 ld SOIC - Wide 24 Ind Reel, 1000 - $18.32 Y  Material Info PCN Purchase
AD7237AQ Status: Production CERDIP GLASS SEAL 24 Ind Tube, 15 $30.32 $30.32 N  Material Info PCN Purchase
AD7237ATQ Status: Production CERDIP GLASS SEAL 24 Mil Tube, 15 $116.86 $116.86 N  Material Info PCN Purchase
AD7237JNZ Status: Production 24 ld PDIP 24 Ind Tube, 15 $18.92 $16.09 Y  Material Info PCN Purchase
AD7237JR Status: Production 24 ld SOIC - Wide 24 Comm. Tube, 31 $20.17 $17.14 N  Material Info PCN Purchase
AD7237JR-REEL Status: Last Time Buy 24 ld SOIC - Wide 24 Comm. Reel, 1000 - $17.14 N  Material Info PCN/PDN Purchase
AD7237JRZ Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $18.37 $15.62 Y  Material Info PCN Purchase
AD7237JRZ-REEL Status: Last Time Buy 24 ld SOIC - Wide 24 Ind Reel, 1000 - $15.62 Y  Material Info PCN/PDN Purchase
AD7237KN Status: Production 24 ld PDIP 24 Ind Tube, 15 $22.19 $18.85 N  Material Info PCN Purchase
AD7237KR Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $23.67 $20.11 N  Material Info PCN Purchase
AD7237KR-REEL Status: Contact ADI 24 ld SOIC - Wide 24 Ind Reel, 1000 - - N  Material Info PCN/PDN Contact ADI
AD7237KRZ Status: Production 24 ld SOIC - Wide 24 Ind Tube, 31 $21.56 $18.32 Y  Material Info PCN Purchase
AD7237KRZ-REEL Status: Obsolete 24 ld SOIC - Wide 24 Ind Reel, 1000 - - Y  Material Info PCN/PDN 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.


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