參數(shù)資料
型號(hào): AD5227BUJZ10-RL7
廠商: Analog Devices Inc
文件頁(yè)數(shù): 6/16頁(yè)
文件大小: 0K
描述: IC DGTL POT UP/DN 10K TSOT23-8
標(biāo)準(zhǔn)包裝: 1
接片: 64
電阻(歐姆): 10k
電路數(shù): 1
溫度系數(shù): 標(biāo)準(zhǔn)值 35 ppm/°C
存儲(chǔ)器類(lèi)型: 易失
接口: 3 線串行(芯片選擇,增/減)
電源電壓: 2.7 V ~ 5.5 V
工作溫度: -40°C ~ 105°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: SOT-23-8 薄型,TSOT-23-8
供應(yīng)商設(shè)備封裝: TSOT-23-8
包裝: 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁(yè)面: 786 (CN2011-ZH PDF)
其它名稱(chēng): AD5227BUJZ10RL7DKR
AD5227
Rev. B | Page 14 of 1
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02468
10
1
04419-0-041
DAYS
BATTERY
VOLTAGE
(V)
CONSTANT BIAS WITH SUPPLY TO
RETAIN RESISTANCE SETTING
2
TA = 25°C
Users who consider EEMEM potentiometers but cannot justify
the additional cost and programming for their designs can con-
sider constantly biasing the AD5227 with the supply to retain
the resistance setting as shown in Figure 38. The AD5227 is
designed specifically with low power to allow power conservation
even in battery-operated systems. As shown in Figure 39, a
similar low power digital potentiometer is biased with a 3.4 V
450 mA/hour Li-Ion cell phone battery. The measurement shows
that the device drains negligible power. Constantly biasing the
potentiometer is a practical approach because most portable
devices do not require detachable batteries for charging.
Although the resistance setting of the AD5227 is lost when the
battery needs to be replaced, this event occurs so infrequently
that the inconvenience is minimal for most applications.
Figure 39. Battery Consumption Measurement
04419-0-040
VDD
AD5227
U1
GND
VDD
U2
GND
COMPONENT X
VDD
U3
GND
COMPONENT Y
GND
VDD
BATTE
RY
OR
SYSTEM
POW
E
R
SW1
+
Figure 38. Constant Bias AD5227 for Resistance Retention
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