AD568SQ

Overview

The AD568SQ is a monolithic 12-bit ultrahigh-speed digital-to-analog converter (DAC) fabricated using Analog Devices’ Complementary Bipolar process. It delivers a full-scale current of 10.24 mA or an unbuffered voltage output of 1.024 V. The device achieves a current settling time to 1 LSB in 35 ns and maintains monotonicity over its operating temperature range of –55 °C to +125 °C. It features a high-stability buried zener reference, laser-trimmed linearity, and variable threshold logic compatible with TTL and CMOS families. Packaged in a hermetic 24-lead skinny DIP (Q-24), it supports bipolar ranges via pin strapping.

Feature Summary

• Ultrahigh speed: Current settling to 1 LSB in 35 ns
• Monotonicity guaranteed over the full –55 °C to +125 °C temperature range
• Hermetic 24-lead skinny DIP (Q-24) packaging for MIL-STD-883 compliance
• Variable threshold input compatible with TTL and +5 V CMOS logic

Applications

• Waveform generation systems requiring fast settling times
• Graphics display controllers
• High-speed analog-to-digital conversion front ends

Procurement Notes

Verify that the specific orderable part number matches the required performance grade and package style. Confirm environmental compliance and military screening requirements if applicable. Check for ESD sensitivity precautions during handling. Ensure supply voltages align with the specified ±13.5 V to ±16.5 V range for proper operation.

Selection Notes

Select the AD568SQ when extended temperature operation from –55 °C to +125 °C is required. Choose this model over the JQ or KQ variants if hermetic ceramic packaging is necessary for harsh environments. Consider the 10.24 mA full-scale current output for applications needing direct current drive or external buffering with precision scaling resistors.

Part Context

The AD568 series represents an ultrahigh-speed monolithic DAC family. The SQ suffix specifically denotes the industrial/military temperature grade variant housed in a hermetic ceramic dual in-line package. This distinguishes it from the standard plastic or lower-grade ceramic versions available in the same product line.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.