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參數資料
| 型號： | AD5227BUJZ50-RL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 6/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DGTL POT 50K UP/DN TSOT23-8 |
| 標準包裝： | 1 |
| 接片： | 64 |
| 電阻（歐姆）： | 50k |
| 電路數： | 1 |
| 溫度系數： | 標準值 35 ppm/°C |
| 存儲器類型： | 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 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SOT-23-8 薄型，TSOT-23-8 |
| 供應商設備封裝： | TSOT-23-8 |
| 包裝： | 標準包裝 |
| 其它名稱： | AD5227BUJZ50-RL7DKR |
AD5227
Rev. B | Page 14 of 1
6
3.50
3.40
3.41
3.42
3.43
3.44
3.45
3.46
3.47
3.48
3.49
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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相關代理商/技術參數 |
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| AD5227BUJZ50-RL72 | 制造商:AD 制造商全稱:Analog Devices 功能描述:64-Position Up/Down Control Digital Potentiometer |
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