BU2507FV ROHM Electronics, BU2507FV Datasheet - Page 7

• Manufacturer Part Number: BU2507FV
• Manufacturer: ROHM Electronics

Optical disc ICs
! ! ! ! Application circuit
! ! ! ! Operation notes
• There are 3 different type of power supply terminal and 1 type of GND terminal in this IC.
• Pile up ripple and noise to there power supply terminals, it can’t keep accuracy of the D/A converter.
• The capacitor between output and GND recommend to set under 100pF including parasitic capacitor in order
• RESET terminal uses the I/O-cell of the internal pull-up resistance, adding a capacitor between this terminal and
Each of there terminalsrequires the constant power supply for operating.
Therefore external bypass capacitor recommend to set as close as possible to the terminals between V
in order to stabilizes the D/A converter.
to reduces jitter from layout of the output line and noise.
GND, this IC will have equivalent function as power-on-reset, by making a time-delay.
When a reset signal is inputted from the controller, it is possible that the output of all channels are fixed on Low-level in
the “L” section on the pulse.
Controller
Vref
Vref
RESET
LD
CLK
DI
H
L
GND
Vcc
Ao6
Ao1
Ao2
Ao3
CH1
CH2
CH3
CH6
BU2507FV
DD
and GND
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