There are also ESD protection diodes bet" />
參數(shù)資料
型號(hào): AD5171EVAL
廠商: Analog Devices Inc
文件頁(yè)數(shù): 7/24頁(yè)
文件大?。?/td> 0K
描述: BOARD EVAL FOR AD5171
標(biāo)準(zhǔn)包裝: 1
主要目的: 數(shù)字電位器
已用 IC / 零件: AD5171
已供物品:
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AD5171BRJZ100-R7-ND - IC DGTL POT OTP 100K SOT23-8
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AD5171
Rev. D | Page 15 of 24
TERMINAL VOLTAGE OPERATING RANGE
POWER-UP/POWER-DOWN SEQUENCES
There are also ESD protection diodes between VDD and the
RDAC terminals; therefore, the VDD of the AD5171 defines their
voltage boundary conditions (see Figure 31). Supply signals
present on Terminal A, Terminal B, and Terminal W that
exceed VDD are clamped by the internal forward-biased diodes
and should be avoided.
Similarly, because of the ESD protection diodes, it is important
to power VDD first before applying any voltages to Terminal A,
Terminal B, and Terminal W. Otherwise, the diode is forward-
biased such that VDD is powered unintentionally and can affect
the remainder of the users’ circuits. The ideal power-up sequence is
the following order: GND, VDD, digital inputs, and VA/VB/VW.
The order of powering VA, VB, VW, and the digital inputs is not
important as long as they are powered after VDD. Similarly, VDD
should be powered down last.
GND
A
W
B
VDD
03
43
7-
0
29
Figure 31. Maximum Terminal Voltages Set by VDD
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