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參數(shù)資料
| 型號： | AD5162BRM100-RL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | Dual 256-Position SPI Digital Potentiometer |
| 中文描述： | DUAL 100K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO10 |
| 封裝： | 3 X 4.90 MM, MO-187BA, MSOP-10 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 960K |
| 代理商： | AD5162BRM100-RL7 |
AD5162
LAYOUT AND POWER SUPPLY BYPASSING
It is good practice to employ compact, minimum lead length
layout design. The leads to the inputs should be as direct as
possible with a minimum conductor length. Ground paths
should have low resistance and low inductance.
Rev. A | Page 15 of 20
Similarly, it is also good practice to bypass the power supplies
with quality capacitors for optimum stability. Supply leads to the
device should be bypassed with disc or chip ceramic capacitors
of 0.01 μF to 0.1 μF. Low ESR 1 μF to 10 μF tantalum or electro-
lytic capacitors should also be applied at the supplies to
minimize any transient disturbance and low frequency ripple
(see Figure 39). Note that the digital ground should also be
joined remotely to the analog ground at one point to minimize
the ground bounce.
V
DD
GND
V
DD
C3
10
μ
F
C1
0.1
μ
F
AD5162
+
0
Figure 39. Power Supply Bypassing
CONSTANT BIAS TO RETAIN RESISTANCE SETTING
For users who desire nonvolatility but cannot justify the addi-
tional cost for the EEMEM, the AD5162 may be considered as a
low cost alternative by maintaining a constant bias to retain the
wiper setting. The AD5162 is designed specifically with low
power in mind, which allows low power consumption even in
battery-operated systems. The graph in Figure 40 demonstrates
the power consumption from a 3.4 V 450 mAhr Li-Ion cell
phone battery, which is connected to the AD5162. The measure-
ment over time shows that the device draws approximately
1.3 μA 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.
This demonstrates that constantly biasing the potentiometer is
not an impractical approach. Most portable devices do not
require the removal of batteries for the purpose of charging.
Although the resistance setting of the AD5162 is lost when the
battery needs replacement, such events occur rather infre-
quently such that this inconvenience is justified by the lower
cost and smaller size offered by the AD5162. If and when total
power is lost, the user should be provided with a means to
adjust the setting accordingly.
DAYS
B
0
90%
92%
94%
96%
5
10
15
98%
100%
102%
104%
106%
108%
110%
20
25
30
0
T
A
= 25
°C
Figure 40. Battery Operating Life Depletion
EVALUATION BOARD
An evaluation board, along with all necessary software, is
available to program the AD5162 from any PC running
Windows 98/2000/XP. The graphical user interface, as shown in
Figure 41, is straightforward and easy to use. More detailed
information is available in the user manual, which comes with
the board.
Figure 41. AD5162 Evaluation Board Software
The AD5162 starts at midscale upon power-up. To increment or
decrement the resistance, the user may simply move the scroll-
bars on the left. To write any specific value, the user should use
the bit pattern in the upper screen and press the Run button.
The format of writing data to the device is shown in Table 8.
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| AD5162BRM10-RL7 | 制造商:Analog Devices 功能描述:Digital Potentiometer 256POS 10KOhm Dual 10-Pin MSOP T/R 制造商:Analog Devices 功能描述:DGTL POTENTIOMETER 256POS 10KOHM DUAL 10MSOP - Tape and Reel |
| AD5162BRM2.5 | 功能描述:IC POT DUAL 2.5K 256POS 10-MSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲器類型:非易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| AD5162BRM2.5-RL7 | 功能描述:IC DGTL POT DUAL 256POS 10-MSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲器類型:非易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| AD5162BRM50 | 功能描述:IC POT DUAL 50K 256POS 10-MSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲器類型:非易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| AD5162BRM50-RL7 | 功能描述:IC DGTL POT DUAL 256POS 10-MSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲器類型:非易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
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