Analog Devices DAC8248FP

DAC 2-CH R-2R 12-bit 24-Pin PDIP N Tube

Digital to Analog Converters - DAC Dual 12B (8B Byte) Dbl-Buffered CMOS

12BIT DAC CMOS DUAL, 8248, DIP24; Settling Time:1µs; Case Style:DIP; No. of Pins:24; Operating Temperature Range:-40°C to +85°C; Max Operating Temperature:85°C; Min Temperature Operating:-40°C; A/D, D/A Features:CMOS, Double-Buffered, Microprocessor Compatible; Base Number:8248; Conversion Time:1µs; IC Generic Number:8248; Linearity Error:1%; Linearity Error, ADC/DAC +:1LSB; Linearity Error, ADC/DAC -:1LSB; Logic Function Number:8248; Max Power Dissipation Ptot:30mW; No. of Bits:12; No. of Channels:2

The DAC-8248 is a dual 12-bit, double-buffered, CMOS digital-to-analog converter. It has an 8-bit wide input data port that interfaces directly with 8-bit microprocessors. It loads a 12-bit word in two bytes using a single control; it can accept either a least significant byte or most significant byte first. For designers with a 12-bit or 16-bit wide data path, choose the DAC-8222 or DAC-8221. The DAC-8248's double-buffered digital inputs allow both DAC's analog output to be updated simultaneously. This is particularly useful in multiple DAC systems where a common LDAC signal updates all DACs at the same time. A single RESET pin resets both outputs to zero. The DAC-8248's monolithic construction offers excellent DAC-to-DAC matching and tracking over the full operating temperature range. The DAC consists of two thin-film R-2R resistor ladder networks, two 12-bit, two 8-bit, and two 4-bit data registers, and control logic circuitry. Separate reference input and feedback resistors are provided for each DAC. The DAC8248 operates on a single supply from +5 V to +15 V, and it dissipates less than 0.5 mW at +5 V (using zero or VDD logic levels). The device is packaged in a space-saving 0.3", 24-pin DIP. The DAC-8248 is manufactured with PMI's highly-stable thin-film resistors on an advanced oxide-isolated, silicon-gate, CMOS technology. PMI's improved latch-up resistant design eliminates the need for external protective Schoottky diodes.