MATCHGAIN-CALC

Wideband Comp Current Output DAC to SE Interface: Impr Matching for Gain & Compliance Volt Swing

MATCHGAIN-CALC

Overview

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High-speed digital-to-analog converters (DACs) most often use a transformer-coupled output stage. In applications where this configuration is not practical, a single op amp differential to single-ended stage has often been used. This application note steps through the exact design equations required to achieve gain matching from each output as well as a matched input impedance to each of the DAC current outputs. An example high-speed design is shown in the attached document.

High-speed DACs (>10MSPS)
DAC2900 Dual-Channel, 10-Bit, 125-MSPS Digital-to-Analog Converter (DAC) DAC2902 Dual-Channel, 12-Bit, 125-MSPS Digital-to-Analog Converter (DAC) DAC2904 Dual-Channel, 14-Bit, 125-MSPS Digital-to-Analog Converter (DAC) DAC2932 Dual-Channel, 12-Bit, 40-MSPS, Ultra-Low Power Digital-to-Analog Converter (DAC) DAC5652 Dual-Channel, 10-Bit, 275-MSPS Digital-to-Analog Converter (DAC) DAC5662 Dual-Channel, 12-Bit, 275-MSPS Digital-to-Analog Converter (DAC) DAC5672 Dual-Channel, 14-Bit, 275-MSPS Digital-to-Analog Converter (DAC) DAC5674 14-Bit, 400-MSPS, 2x-4x Interpolating Digital-to-Analog Converter (DAC) DAC5675A 14-Bit, 400-MSPS Digital-to-Analog Converter (DAC) DAC900 10-Bit 165-MSPS Digital-to-Analog Converter (DAC) DAC902 12-Bit 165-MSPS Digital-to-Analog Converter (DAC) DAC904 14-Bit 165-MSPS Digital-to-Analog Converter (DAC) DAC908 8-Bit 165-MSPS Digital-to-Analog Converter (DAC) THS5641A 8-Bit, 100-MSPS Digital-to-Analog Converter (DAC) THS5651A 10-Bit, 125-MSPS Digital-to-Analog Converter (DAC) THS5661A 12-Bit, 125-MSPS Digital-to-Analog Converter (DAC) THS5671A 14-Bit, 125-MSPS Digital-to-Analog Converter (DAC)

Technical documentation

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* Application note Wideband Complementary Current Output DAC Single-Ended Interface (Rev. A) May 08, 2015

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