ADI DAC8221GPZ

The DAC-8221 combines two identical 12-bit, multiplying, digital to-analog converters into a single CMOS chip. This device is electrically similar to DAC-8212 with improved microprocessor interface timing and is packaged in a narrow 0.300" DIP. Monolithic construction offers excellent DAC-to-DAC matching and tracking over the full operating temperature range. The DAC8221 consists of two thin-film R-2R resistor-ladder networks, two 12-bit data latches, one 12-bit input buffer, and control logic. The DAC-8221 operates on a single supply from +5V to +15V. Maximum power dissipation with 0V and +5V logic levels and a +5V supply is less than 0.5mW. The DAC-8221 is manufactured using PMI's highly-stable, thin-film resistors on an advanced oxide-isolated, silicon-gate, CMOS process. PMI's improved latch-up resistant design eliminates the need for external protective Schottky diodes. A common 12-bit (TTL/CMOS compatible) input port is used to load a 12-bit-wide word into either of the two DACs. This port, whose data loading is similar to that of a RAM's write cycle, interfaces directly with most 12-bit or wider bus systems. With WR and CS lines at logic LOW, the input data registers are transparent. This allows direct unbuffered data to flow directly to the DAC output selected by DAC A/DAC B control input. For applications requiring double-buffering, see the DAC-8222.

• Two Matched 12-Bit DACs on One Chip
• Packaged in a Narrow 0.3" 24-Pin DIP
• Direct Parallel Load of All 12 Bits for High Data Throughput
• On-Chip Latches for Both DACs
• 12-Bit Endpoint Linearity (±1/2 LSB) Over Temperature
• +5V to ±15V Single Supply Operation
• DACs Matched to 0.2% Typically
• Four-Quadrant Multiplication
• Improved ESD Resistance
• Available in Die Form

• Automatic Test Equipment
• Industrial Automation
• Robotics/Process Control
• Programmable Instrumentation Equipment
• Digital Gain/Attenuation Control
• Ideal for Battery-Operated Equipment