AA88368AP Datasheet, PDF (14/15 Pages) Agamem Microelectronic Inc. – 10-BIT DAC

AA88368AP Agamem Mircoelectronics Inc.
PRELIMINARY
10-BIT DAC
„ OPERATION NOTES
• There are 3 different type of power supply terminal and 1 type of GND terminal in this IC.
Each of these terminals requires the constant power supply for operating.
• Pile up ripple and noise to these power supply terminals, it can‘t keep the accuracy of the
D/A converter. Therefore external bypass capacitor recommend to set as close as possible to
the terminals between VDD and GND in order to stabilizes the D/A converter.
• The capacitor between output and GND recommend to set under 100pF including parasitic
capacitor in order to reduces jitter from layout of the output line and noise.
• LSB-first or MSB-first decoding are selected by REVERSE terminal. Therefore, REVERSE
terminal should be set as —open“ or —VDD short“ at LSB-first mode, —GND short“ at
MSB-first mode.
• RESET terminal uses the I/O-cell of the internal pull-up resistance, adding a capacitor
between this terminal and 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.
14
2006/7/5