AD7248ABCHIPS:  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.

AD7248ABCHIPS 功能框图

AD7248A 芯片订购指南
产品型号 产品状态 封装 引脚 温度范围
AD7248AACHIPS 量产 CHIPS OR DIE - 商业
AD7248AAN 量产 20 ld PDIP 20 工业
AD7248AANZ 量产 20 ld PDIP 20 工业
AD7248AAP 量产 20 ld PLCC 20 工业
AD7248AAP-REEL 量产 20 ld PLCC 20 工业
AD7248AAPZ 量产 20 ld PLCC 20 工业
AD7248AAPZ-REEL 量产 20 ld PLCC 20 工业
AD7248AAR 量产 20 ld SOIC - Wide 20 工业
AD7248AARZ 量产 20 ld SOIC - Wide 20 商业
AD7248AARZ-REEL 量产 20 ld SOIC - Wide 20 商业
AD7248ABCHIPS 量产 CHIPS OR DIE - 商业
AD7248ABN 量产 20 ld PDIP 20 工业
AD7248ABNZ 量产 20 ld PDIP 20 工业
AD7248ABR 量产 20 ld SOIC - Wide 20 工业
AD7248ABRZ 量产 20 ld SOIC - Wide 20 商业
AD7248ABRZ-REEL 量产 20 ld SOIC - Wide 20 商业
AD7248AQ 量产 20 ld CerDIP 20 工业
AD7248ATQ 量产 20 ld CerDIP 20 商业
AD7248JN 量产 20 ld PDIP 20 商业
AD7248JNZ 量产 20 ld PDIP 20 商业
AD7248JP 量产 20 ld PLCC 20 商业
AD7248JP-REEL 量产 20 ld PLCC 20 商业
AD7248JPZ 量产 20 ld PLCC 20 商业
AD7248SE 量产 20 ld LCC 20 军用
AD7248SQ 量产 20 ld CerDIP 20 军用
AD7248ABCHIPS 应用技术支持与电子电路设计开发资源下载
  1. AD7248A 数据手册DataSheet 下载 . pdf
  2. ADI 模拟器件公司比较器产品选型指南 . pdf
  3. Analog Devices, Inc. 美国模拟器件公司产品订购手册 .pdf