BD9406KS2 Datasheet, PDF (33/38 Pages) Rohm – 28bit Audio DSP with Built-in 2ch ADC, 6ch DAC and ASRC

BU9406KS2
Technical Note
●Operational Notes
(1) ABSOLUTE MAXIMUM RATINGS
Permanent device damage may occur and break mode (open or short) can not be specified if power supply, operating
temperature, and those of ABSOLUTE MAXIMUM RATINGS are exceeded. If such a special condition is expected,
components for safety such as fuse must be used.
(2) Power Supply
Power and Ground line must be designed as low impedance in the PCB. Print patterns if digital power supply and analog
power supply must be separated even if these have same voltage level. Print patterns for ground must be designed as same
as power supply. These considerations avoid analog circuits from the digital circuit noise. All pair of power supply and ground
must have their own de-coupling capacitor. Those capacitor should be checked about their specification, etc. (nominal
electrolytic capacitor degrades its capacity at low temperature) and choose the constant of an electrolytic capacitor.
(3) Functionality in the strong electro-magnetic field
Malfunction may occur if in the strong electro-magnetic field.
(4) Input terminals
All LSI contain parasitic components. Some are junctions which normally reverse bias. When these junctions forward bias,
currents flows on unwanted path, malfunction or device damage may occur. To prevent this, all input terminal voltage must be
between ground and power supply, or in the range of guaranteed value in the Electrical characteristics. And no voltage should
be supplied to all input terminal when power is not supplied.
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2012.03 - Rev.A