DAC729

VDD to Common ........................................................................ 0V to +7V
+VCC to Common .................................................................... 0V to +18V
VCC to Common .................................................................. 0V to 18V
Digital Data Inputs (pins 1-18) to Common ......................... 0.5V to VDD
Reference Voltage In (pin 31) ............................................... +9V to +11V
Reference Out (pin 32) to Common ............... Indefinite Short to Common
External Voltage Applied to D/A Output (pin 29) .................... 5V to +5V
External Voltage Applied to Feedback Resistors
(pins 25, 26, 27, 28) ........................................................... 15V to +15V
VOUT (pin 23) ................................................. Indefinite Short to Common
Power Dissipation ........................................................................ 3000mW
Storage Temperature ................................................. 60°C to +150°C
Lead Temperature (soldering, 10s) ............................................. +300°C
NOTE: (1) Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability.

The DAC729 sets the standard in very high accuracy digital-to-analog conversion. It is supplied from the factory at a guaranteed linearity of 16 bits, and is useradjustable to 18-bit linearity (1LSB = FSR/262144).

To attain this high level of accuracy, the design takes advantage of Burr-Brown's thin-film monolithic DAC process, dielectric op amp process, hybrid capabilities, and advanced test and laser-trim techniques. The DAC729 hybrid layout is specifically partitioned to minimize the effects of external load-currentinduced thermal errors. The op amp design consists of a fast settling precision op amp with a current buffer within the feedback loop.

This buffer isolates the load from the precision op amp, which results in a fast settling (8ms to 16 bits) output. The standard 40-pin package offers full hermeticity, contributing to the excellent reliability of the DAC729.