■ Outline
YAC520(HGVC1) is a high grade stereophonic digital volume for high end audio system. It provides wide dynamic range and low distortion as well, and can control individual channels in 256 steps with 0.5 dB per step. The use of 16 bit serial data interface allows daisy chain connection of several devices for multi channel system.
Zero Crossing Detection function suppresses audible noise at quick change of the volume. YAC520 operates on a single 5 volt power supply, and it is possible to input signal of up to 7.9Vrms by using three types of connection methods. Development evaluation board, DMB-HGVC1, equipped with PC interface is available.

■ Features
● Wide volume range           A: +32.0 to – 95.0dB IN1=IN2 (Input < 2.0Vrms @VDD=5V)
   (can be used in three ways) B: +29.5 to – 97.5dB IN2=GND (Input < 2.6Vrms @VDD=5V)
                                        C: +20.0 to – 107.0dB IN1=GND (Input < 7.9Vrms @VDD=5V)
● Adjustment step adjustable in 256 steps, with 0.5dB per step
● Gain Error ± 0.1dB
● Low distortion factor 0.001% (input=150 mVrms, gain=+16dB)
● Low residual noise 1 µVrms (gain=- )

■ Others
   Process CMOS process
   Package 20 SSOP (YAC520-E)
   Power supply voltage 5 V
   Operating temperature 0 to +70 ºC
   Power consumption 100 mW @VDD=5.0 V