AD9768JQ

Digital To Analog Converters Overview

The AD9768JQ is an obsolete 8-bit, ultra-high-speed current-output digital-to-analog converter (DAC) from Analog Devices. It supports update rates up to 100 MSPS with a typical settling time of 5 ns to 0.2% full scale. The device features ECL-compatible digital inputs and complementary current outputs suitable for direct transmission line driving. It operates on ±5 V supplies with a maximum power dissipation of 430 mW. The component includes an internal monolithic reference voltage of –1.26 V and supports two-quadrant multiplying modes in both voltage and current configurations.

Digital To Analog Converters Feature Summary

• 8-bit resolution with 100 MSPS update rate and 5 ns settling time
• ECL-compatible digital input logic levels
• Complementary current outputs with nominal 20 mA full-scale range
• Two-quadrant multiplying capability: 40 MHz bandwidth in current mode

Digital To Analog Converters Applications

• Raster scan and vector graphic displays
• High speed waveform generation
• Digital VCOs
• Ultrafast digital attenuators

Digital To Analog Converters Procurement Notes

The AD9768JQ is classified as obsolete by the manufacturer. Verification of availability requires checking secondary market distributors or surplus suppliers. No new production units are expected from Analog Devices. Designers should confirm the specific suffix 'JQ' corresponds to the ceramic DIP package variant if sourcing replacements.

Digital To Analog Converters Selection Notes

Select this component only for legacy systems requiring ECL logic compatibility and high-speed current output. Ensure external resistors RSET and RL have low temperature coefficients to maintain accuracy. Verify that the application can accommodate the required ±5 V supply rails and thermal management for up to 430 mW dissipation in the ceramic package.

Digital To Analog Converters Part Context

The AD9768 belongs to a family of high-performance DACs optimized for transmit signal paths and waveform generation. It shares architectural similarities with other TxDAC devices but is distinguished by its specific ECL interface and current-output topology. The 'J' suffix typically denotes the ceramic DIP package option within the product line.

Digital To Analog Converters Replacement Considerations

As an obsolete part, no direct pin-compatible replacement is officially documented in the provided source material. System redesign may be necessary using modern high-speed DACs with LVDS interfaces and lower power consumption.