The DAC-8248 is a dual-channel, 12-bit, double-buffered CMOSDigital-to-analog converters。 The device has an 8-bit wide input data port that interfaces directly to an 8-bit microprocessor. Load one 12-bit data word into two bytes through a single control instruction; You can accept either the least significant byte or the most significant byte first. For 12-bit or 16-bit wide data paths, select DAC-8222 or DAC-8221.
The DAC-8248 features a double-buffered digital input that allows simultaneous updates of the analog outputs of both DACs. In through the poolLDACThis is useful in multi-DAC systems where the signal updates all DACs simultaneously. Through oneRESETThe pin resets both outputs to zero simultaneously.
The DAC-8248 features a monolithic structure that provides good DAC-DAC matching and tracking over the entire 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. Independent reference inputs and feedback resistors are provided for each DAC. The DAC8248 operates from a single +5 V to +15 V supply and consumes less than 0.5 mW at +5 V using zero or VDD logic levels. The device is available in a space-saving 0.3" 24-pin DIP package.
The DAC-8248 is based on an advanced oxide-isolated, silicon-gate CMOS process and is fabricated with PMI's highly stable thin-film resistors. PMI's improved anti-latch-up design eliminates the need for external protection Schottky diodes.