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DAC8228:  Dual 8-Bit, CMOS, Voltage Output, D/A Converter in a Single Chip

Product Details

Newer Alternatives:
  • AD5302 2.5 V to 5.5 V, 230 µA, Dual Rail-to-Rail Voltage Output 8-Bit DAC in a 10-Lead MicroSOIC Package

The DAC-8228 is a dual 8-bit, voltage output, CMOS, D/A converter in a single chip. It was designed to drop into AD7528/7628 sockets eliminating two external op amps in applications such as hard disk drives. These applications generallt operate the AD7528/7628 with zero volts applied to VREF and offset AGND to +2.5 or +5 volts. The DAC-8228 is tested under both these conditions.

The DAC-8228 can also be used in those applications requiring a unipolar output voltage. It can deliver an output voltage between 0V and +10V with VDD=+14V(maximum output voltage is VDD-4V). The DAC-8228's reference input can accept a negative voltage from 0V to-10V(the DAC's internal unity-gain inverting amplifier inverts the input signal). Choose the DAC-8229 for bipolar operation.

The DAC8228 offers CerDIP and plastic packaged devices in the extended industrial temperature range of -40° to +85°C. Applications requiring the military temperature range should use the DAC-8229. To make the DAC-8229 pin and functionally compatible with the DAC-8228, AGND A and AGND B should be tied together to function as VZ, and VSS connected to GND.

The DAC-8228 consists of two CMOS voltage output amplifiers, two high-accuracy R-2R resistor ladder networks, interface control logic, and two 8-bit registers. An internal regulator maintains TTL logic compatibility and fast microprocessor interface timing over the full VDD range.

The DAC-8228 dissipates only 90mW in the space saving 20-pin 0.3" DIP or the 20-lead SO surface mount package. Its compact size, low power, and economical cost per channel, makes it attractive for applications requiring multiple D/A converters without sacrificing circuit-board space. Reduced parts count also improves system reliability.

Using PMI's advanced oxide-isolated, silicon-gate CMOS process, coupled with its highly-stable thin-film resistor ladder, allows the DAC-8228 to offer superior matching and temperature tracking between DACs.


  • Two 8-Bit Voltage Out DACs in a Single Chip
  • Fits 7528/7628 Sockets
  • Adjustment Free Internal CMOS Ops Amps
  • Single +12V to +15V Operation
  • Improved Resistance to ESD
  • TTL Compatible Over Full VDDrange
  • Fast Interface Timing
    ........DAC8228...TWR = 50 ns
  • Available in Small Outline Package
  • CerDIP and Epoxy Packages come in the Extended Industrial Temperature Range of -40°C to +85°C

Functional Block Diagram for DAC8228

Similar Products

  • AD5302 2.5 V to 5.5 V, 230 µA, Dual Rail-to-Rail Voltage Output 8-Bit DAC in a 10-Lead MicroSOIC Package
  • AD5722R Complete, Dual, 12-Bit, Unipolar/Bipolar, Voltage Output DAC with Internal Reference
  • AD5312 2.5 V to 5.5 V, 230 µA, Dual Rail-to-Rail Voltage Output 10-Bit DAC


Title Content Type File Type
DAC8228: Dual 8-Bit CMOS D/A Converter with Voltage Output Data Sheet  (Rev A, 10/2002) (pdf, 431 kB) Data Sheets PDF
Digital to Analog Converters ICs Solutions Bulletin  (pdf) Solutions Bulletins PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

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Price, packaging, availability

DAC8228 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
DAC8228FPZ Status: Production 20 ld PDIP 20 Tube, 18 $6.14 $5.57 Y  Material Info PCN Purchase
DAC8228FS-REEL Status: Production 20 ld SOIC - Wide 20 Comm. Reel, 1000 - $6.73 N  Material Info PCN Purchase
DAC8228FSZ Status: Production 20 ld SOIC - Wide 20 Tube, 37 $6.78 $6.12 Y  Material Info PCN Purchase
DAC8228FSZ-REEL Status: Production 20 ld SOIC - Wide 20 Comm. Reel, 1000 - $6.12 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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