Complete, 12-Bit Multiplying DAC

The MX7845 is a 12-bit, voltage-output, 4-quadrant, multiplying digital-to-analog converter (DAC). A precision internal output amplifier and thin-film resistors, laser-trimmed at the wafer level, maintain accuracy over the full operating temperature range. The output amplifier is internally compensated and drives ±10V into a 2kΩ load. The MX7845 has buffered latches that are easily interfaced with microprocessors. Data is transferred into the input register from a 12-bit-wide data path. The input registers are controlled by standard active-low CHIP SELECT (active-low CS) and active-low WRITE (active-low WR) signals. For stand-alone operation, the active-low CS and active-low WR inputs are grounded, making all latches transparent. All logic inputs are level-triggered and compatible with TTL and +5V CMOS logic levels. For a detailed description of MX7845 operation, refer to the MAX501/MAX502 data sheet.

Applications

* Automatic Test Equipment * Digital Attenuators * Digital to 4-20mA Converters * Programmable Power Supplies * Programmable-Gain Amplifiers

* Complete MDAC with Output Amplifier

* 4-Quadrant Multiplication

* Guaranteed Monotonic (TMIN to TMAX)

* Matched Application Resistors

* Small 0.3" 24-Pin DIP Package