Like the LTC2641 and LTC2642 single DACs discussed previously, the LTC2656 also offers very good AC specifications. The LTC2656 reference buffers shield the reference voltage from glitches caused by DAC switching, and thus minimize the DAC-to-DAC dynamic crosstalk to less than a very low 2 nanovolt-second. Therefore, switching one DAC output causes minimal disturbance to the other DACs in the package. The LTC2656 also offers a very low 3 nanovolt-second glitch impulse at 3V and 6 nanovolt-second at 5V. Glitch impulse is a figure of merit that says how quickly the DAC output can switch and settle from one code to another. A large glitch impulse means the system designer must either wait a long time for the DAC output to settle or experience a large voltage transient, which could cause disturbances down the line. Low glitch impulse is key for AC applications such as waveform generation. Fast settling and low glitch reduce the harmonic distortion, making it possible to produce higher frequency, lower noise output waveforms. The LTC2656’s precision DC and AC specifications and high channel count make it ideal for applications such as data acquisition modules, precision optical networking, automatic test equipment, and instrumentation.