AD7248A 12-Bit DACPORT with Double-Buffered Byte Loading

The AD7245A/AD7248A is an enhanced version of the industry standard AD7245/AD7248. Improvements include operation from 12 V to 15 V supplies, a ±1/2 LSB linearity grade, faster interface times and better full scale and reference variations with VDD. Additional features include extended temperature range operation for commercial and industrial grades.

The AD7245A/AD7248A is a complete, 12-bit, voltage output, digital-to-analog converter with output amplifier 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 double-buffered interface logic. The AD7245A accepts 12-bit parallel data which is loaded into the input latch on the rising edge of CS or WR. The AD7248A has an 8-bit wide data bus with data loaded to the input latch in two write operations. For both parts, an asynchronous LDAC signal transfers data from the input latch to the DAC latch and updates the analog output. The AD7245A also has a CLR signal on the DAC latch which allows features such as power-on reset to be implemented.

The on-chip 5 V buried Zener diode provides a low noise, temperature compensated reference for the DAC. 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 kOhm load to GND.

The AD7245A/AD7248A is fabricated in linear compatible CMOS (LC2MOS), an advanced, mixed technology process that combines precision bipolar circuits with low power CMOS logic. The AD7245A is available in a small, 0.3" wide, 24-pin DIP and SOIC and in 28-terminal surface mount packages. The AD7248A is packaged in a small, 0.3" wide, 20-pin DIP SOIC and in 20-terminal surface mount packages.

Digital to Analog Converters
Data Sheets
Documentnote
AD7245A/AD7248A: 12-Bit DACPORT with Double-Buffered Parallel Input Data Sheet (Rev. B)PDF 712 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD7248AAN Last Time Buy20 ld PDIPOTH 18-40 to 85C14.212.44N
AD7248AANZ Production20 ld PDIPOTH 18-40 to 85C12.9111.31Y
AD7248AAP Production20 ld PLCCOTH 49-40 to 85C00N
AD7248AAPZ Production20 ld PLCCOTH 49-40 to 85C14.5212.18Y
AD7248AAPZ-REEL Production20 ld PLCCREEL 1000-40 to 85C012.18Y
AD7248AAR Last Time Buy20 ld SOIC - WideOTH 37-40 to 85C00N
AD7248AARZ Production20 ld SOIC - WideOTH 37-40 to 85C11.399.97Y
AD7248AARZ-REEL Production20 ld SOIC - WideREEL 1000-40 to 85C010.47Y
AD7248ABNZ Production20 ld PDIPOTH 18-40 to 85C17.5815.54Y
AD7248ABRZ Production20 ld SOIC - WideOTH 37-40 to 85C15.5113.71Y
AD7248ABRZ-REEL Production20 ld SOIC - WideREEL 1000-40 to 85C013.71Y
AD7248AQ Production20 ld CerDIPOTH 18-40 to 85C17.6917.69N
AD7248ATQ Last Time Buy20 ld CerDIPOTH 18-55 to 125C42.6836.3N
AD7248JNZ Production20 ld PDIPOTH 180 to 70C14.2812.01Y
AD7248JPZ Production20 ld PLCCOTH 490 to 70C15.2512.79Y
Reference Materials
AD7245A/AD7248A: 12-Bit DACPORT with Double-Buffered Parallel Input Data Sheet (Rev. B) ad7245a
Digital to Analog Converters ICs Solutions Bulletin ad5590