參數(shù)資料
型號(hào): AD5111BCPZ80-500R7
廠商: Analog Devices Inc
文件頁數(shù): 14/24頁
文件大?。?/td> 0K
描述: IC DGTL POT 128POS 80K 8LFCSP
標(biāo)準(zhǔn)包裝: 500
接片: 128
電阻(歐姆): 80k
電路數(shù): 1
溫度系數(shù): 標(biāo)準(zhǔn)值 35 ppm/°C
存儲(chǔ)器類型: 非易失
接口: 3 線串行(芯片選擇,增/減)
電源電壓: 2.3 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-UFDFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 8-LFCSP-UD(2x2)
包裝: 帶卷 (TR)
Data Sheet
AD5111/AD5113/AD5115
Rev. | Page 21 of 24
POWER-UP SEQUENCE
Because of the ESD protection diodes that limit the voltage
compliance at the A, B, and W terminals (see Figure 45), it is
important to power on VDD before applying any voltage to the
A, B, and W terminals. Otherwise, the diodes are forward-
biased such that VDD is powered on unintentionally and can
affect other parts of the circuit. Similarly, VDD should be
powered down last. The ideal power-on sequence is in the
following order: GND, VDD, and VA/VB/VW. The order of
powering VA, VB, VW and the digital inputs is not important as
long as they are powered on after VDD.
GND
VDD
A
W
B
09654-
046
Figure 45. Maximum Terminal Voltages Set by VDD and GND
LAYOUT AND POWER SUPPLY BIASING
It is always a good practice to use compact, minimum lead
length layout design. The leads to the input should be as direct
as possible with a minimum conductor length. Ground paths
should have low resistance and low inductance. It is also good
practice to bypass the power supplies with quality capacitors.
Apply low equivalent series resistance (ESR) 1 μF to 10 μF
tantalum or electrolytic capacitors at the supplies to minimize
any transient disturbance and to filter low frequency ripple.
Figure 46 illustrates the basic supply bypassing configuration
VDD
+
GND
C1
0.1F
C2
10F
AGND
AD5111/
AD5113/
AD5115
09654-
047
Figure 46. Power Supply Bypassing
A
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