Features and Benefits
- 30 MSPS Update Rate
- 16-Bit Resolution
- Linearity: 1/2 LSB DNL @14 Bits
1 LSB INL @14 Bits
- Fast Settling: 25 ns Full-Scale Settling to 0.025%
- SFDR @ 1 MHz Output: 86 dBc
- THD @ 1 MHz Output: 71 dBc
- Low Glitch Impulse: 35 pV-s
- Power Dissipation: 465 mW
- On-Chip 2.5 V Reference
- Edge-Triggered Latches
- Multiplying Reference Capability
The AD768 is a 16-bit, high speed digital-to-analog converter (DAC) that offers exceptional ac and dc performance. The AD768 is manufactured on ADI's Advanced Bipolar CMOS (ABCMOS) process, combining the speed of bipolar transistors, the accuracy of laser-trimmable thin film resistors, and the efficiency of CMOS logic. A segmented current source architecture is combined with proprietary switching technique to reduce glitch energy and maximize dynamic accuracy. Edge triggered input latches and a temperature compensated bandgap reference have been integrated to provide a complete monolithic DAC solution.
The AD768 is a current-output DAC with a nominal full-scale output current of 20mA and a 1k(ohm) output impedance. Differential current outputs are provided to support single-ended or differential applications. The current outputs may be tied directly to an output, or fed to the summing junction of a high speed amplifier to provide a buffered voltage output. Also, the differential outputs may be interfaced to a transformer or differential amplifier.
The on-chip reference and control amplifier are configured for maximum accuracy and flexibility. The AD768 can be driven by the on-chip reference or by a variety of external reference voltages based on the selection of an external resistor. An external capacitor allows the user to optimally trade off reference bandwidth and noise performance.
The AD768 operates on ±5V supplies, typically consuming 465 mW of power. The AD768 is available in a 28-pin SOIC package and is specified for operation over the industrial temperature range.
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
Documentation & Resources
Ask the Applications Engineer-17: Must a 16-bit Converter Settle to 16 ppm?1/1/1995 Analog Dialogue
Low-cost 16-bit DAC Updates at 30 MHz7/1/1994 Analog Dialogue
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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