The AD561 is an integrated circuit 10-bit digital-to-analog converter combined with a high stability voltage reference fabricated on a single monolithic chip. Using ten precision highspeed current-steering switches， a control amplifier， voltage reference， and laser-trimmed thin-film SiCr resistor network， the device produces a fast， accurate analog output current. Laser trimmed output application resistors are also included to facilitate accurate， stable current-to-voltage conversion; they are trimmed to 0.1% accuracy， thus eliminating external trimmers in many situations. Several important technologies combine to make the AD561 the most accurate and most stable 10-bit DAC available. The low temperature coefficient， high stability thin-film network is trimmed at the wafer level by a fine resolution laser system to 0.01% typical linearity. This results in an accuracy specification of ±1/4 LSB max for the K and T versions， and 1/2 LSB max for the J and S versions. The AD561 also incorporates a low noise， high stability subsurface zener diode to produce a reference voltage with excellent long term stability and temperature cycle characteristics， which challenge the best discrete Zener references. A temperature compensation circuit is laser-trimmed to allow custom correction of the temperature coefficient of each device. This results in a typical full-scale temperature coefficient of 15 ppm/°C; the TC is tested and guaranteed to 30 ppm/°C max for the K and T versions， 60 ppm/°C max for the S， and 80 ppm/°C for the J.