参数资料
型号: AD5248BRMZ10
厂商: Analog Devices Inc
文件页数: 7/20页
文件大小: 0K
描述: IC DGTL POT DUAL 10K I2C 10-MSOP
标准包装: 50
接片: 256
电阻(欧姆): 10k
电路数: 2
温度系数: 标准值 35 ppm/°C
存储器类型: 易失
接口: I²C(设备位址)
电源电压: 2.7 V ~ 5.5 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-MSOP
包装: 管件
产品目录页面: 787 (CN2011-ZH PDF)
配用: AD5248EVAL-ND - BOARD EVAL FOR AD5248
Data Sheet
AD5243/AD5248
Rev. B | Page 15 of 20
CONSTANT BIAS TO RETAIN RESISTANCE SETTING
For users who desire nonvolatility but cannot justify the addi-
tional cost of an EEMEM, the AD5243/AD5248 can be considered
low cost alternatives by maintaining a constant bias to retain the
wiper setting. The AD5243/AD5248 are designed specifically for
low power applications, allowing low power consumption even
in battery-operated systems. The graph in Figure 44 demonstrates
the power consumption from a 3.4 V, 450 mAhr Li-Ion cell phone
battery connected to the AD5243/AD5248. The measurement
over time shows that the device draws approximately 1.3 A
and consumes negligible power. Over a course of 30 days, the
battery is depleted by less than 2%, the majority of which is due
to the intrinsic leakage current of the battery itself.
DAYS
B
A
T
ER
Y
L
IF
E
D
EPL
ET
ED
(%
)
0
90
92
94
96
5
10
15
98
100
102
104
106
108
110
20
25
30
04109-
0-
019
TA = 25°C
Figure 44. Battery Operating Life Depletion
This demonstrates that constantly biasing the potentiometer
can be a practical approach. Most portable devices do not
require the removal of batteries for the purpose of charging.
Although the resistance setting of the AD5243/AD5248 is lost
when the battery needs replacement, such events occur rather
infrequently such that this inconvenience is justified by the
lower cost and smaller size offered by the AD5243/AD5248. If
total power is lost, the user should be provided with a means to
adjust the setting accordingly.
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