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FEATURES Ultrahigh Speed: Current Settling to 1 LSB in 35 ns High Stability Buried Zener Reference on Chip Monotonicit...
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FEATURES Ultrahigh Speed: Current Settling to 1 LSB in 35 ns High Stability Buried Zener Reference on Chip Monotonicity Guaranteed Over Temperature 10.24 mA Full-Scale Output Suitable for Video Applications Integral and Differential Linearity Guaranteed Over Temperature 0.3" “Skinny DIP” Packaging Variable Threshold Allows TTL and CMOS Interface MIL-STD-883 Compliant Versions Available
12-Bit Ultrahigh Speed Monolithic D/A Converter AD568
FUNCTIONAL BLOCK DIAGRAM
PRODUCT DESCRIPTION
The AD568 is an ultrahigh-speed, 12-bit digital-to-analog converter (DAC) settling to 0.025% in 35 ns. The monolithic device is fabricated using Analog Devices’ Complementary Bipolar (CB) Process. This is a proprietary process featuring high-speed
NPN and
PNP devices on the same chip without the use of dielectric isolation or multichip hybrid techniques. The high speed of the AD568 is maintained by keeping impedance levels low enough to minimize the effects of parasitic circuit capacitances. The DAC consists of 16 current sources configured to deliver a 10.24 mA full-scale current. Multiple matched current sources and thin-film ladder techniques are combined to produce bit weighting. The DAC’s output is a 10.24 mA full scale (FS) for current output applications or a 1.024 V FS unbuffered voltage output. Additionally, a 10.24 V FS buffered output may be generated using an onboard 1 kΩ span resistor with an external op amp. Bipolar ranges are accomplished by pin strapping. Laser wafer trimming ...