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AD5252BRU100

更新时间： 2024-02-16 22:04:02
品牌 Logo 应用领域
亚德诺 - ADI 转换器电位器数字电位计存储电阻器光电二极管
页数 文件大小 规格书
28页 1181K
描述
Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers

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AD5252BRU100 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：TSSOP
包装说明：TSSOP,针数：14
Reach Compliance Code：unknown风险等级：5.84
其他特性：NONVOLATILE MEMORY; DEVICE SUPPORTS DUAL SUPPLY OPERATION标称带宽：0.04 kHz
控制接口：2-WIRE SERIAL转换器类型：DIGITAL POTENTIOMETER
JESD-30 代码：R-PDSO-G14JESD-609代码：e0
长度：5 mm湿度敏感等级：1
标称负供电电压：-2.5 V功能数量：2
位置数：256端子数量：14
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：240认证状态：COMMERCIAL
电阻定律：LINEAR最大电阻容差：20%
最大电阻器端电压：2.75 V最小电阻器端电压：-2.25 V
座面最大高度：1.2 mm标称供电电压：2.5 V
表面贴装：YES技术：CMOS
标称温度系数：650 ppm/ °C温度等级：INDUSTRIAL
端子面层：TIN LEAD端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30标称总电阻：100000 Ω
宽度：4.4 mmBase Number Matches：1

AD5252BRU100 数据手册

 浏览型号AD5252BRU100的Datasheet PDF文件第20页浏览型号AD5252BRU100的Datasheet PDF文件第21页浏览型号AD5252BRU100的Datasheet PDF文件第22页浏览型号AD5252BRU100的Datasheet PDF文件第24页浏览型号AD5252BRU100的Datasheet PDF文件第25页浏览型号AD5252BRU100的Datasheet PDF文件第26页 
AD5251/AD5252  
100  
75  
50  
25  
0
PROGRAMMABLE POTENTIOMETER OPERATION  
R
R
WB  
WA  
If all three terminals are used, the operation is called potenti-  
ometer mode and the most common configuration is the  
voltage divider operation (see Figure 43).  
V
I
A
V
C
W
B
Figure 43. Potentiometer Mode Configuration  
If the wiper resistance is ignored, the transfer function is simply  
0
16  
32  
48  
63  
D
64  
D (Code in Decimal)  
AD5251: VW  
AD5252: VW  
=
=
×VAB +VB  
(5)  
(6)  
Figure 42. AD5251 RWA(D) and RWB(D) vs. Decimal Code  
D
256  
×VAB +VB  
Table 13. RWB vs. Codes; RAB = 10 kΩ, A Terminal = Open  
D (DEC)  
RWB (Ω)  
9918  
5075  
231  
Output State  
A more accurate calculation, which includes the wiper  
resistance effect, yields  
63  
32  
1
Full scale  
Midscale  
1 LSB  
D
RAB + RW  
2N  
0
75  
Zero scale (wiper resistance)  
VW (D) =  
VA  
(7)  
RAB +2RW  
Note that in the zero-scale condition, a 75 Ω finite wiper  
resistance is present. Care should be taken to limit the current  
conduction between W and B in this state to no more than  
5 mA continuous for a total resistance of 1 kΩ, or a 20 mA  
pulse, to avoid degradation or possible destruction of the  
internal switch contact.  
Where 2N is the number of steps. Unlike in rheostat mode  
operation where the tolerance is high, potentiometer mode  
operation yields an almost ratiometric function of D/2N with a  
relatively small error contributed by the RW terms. Therefore,  
the tolerance effect is almost cancelled. Similarly, the  
ratiometric adjustment also reduces the temperature coefficient  
effect to 50 ppm/°C, except at low value codes where RW  
dominates.  
Similar to the mechanical potentiometer, the resistance of the  
RDAC between Wiper W and Terminal A also produces a  
digitally controlled complementary resistance, RWA. When these  
terminals are used, the B terminal can be opened. Setting the  
resistance value for RWA starts at a maximum value of resistance  
and decreases as the data loaded in the latch increases in value  
(see Figure 40). The general equation for this operation is  
Potentiometer mode operations include other applications such  
as op amp input, feedback resistor networks, and other voltage  
scaling applications. The A, W, and B terminals can in fact be  
input or output terminals, provided |VA|, |VW|, and |VB| do not  
exceed VDD to VSS.  
AD5251: RWA(D) = [(64 – D)/64] × RAB + 75 Ω  
AD5252: RWA(D) = [(256 – D)/256] × RAB + 75 Ω  
(3)  
(4)  
Table 14. RWA vs. Codes; AD5ꢀ51, RAB=10 kΩ, B Terminal  
Open  
D (DEC)  
RWA (Ω)  
Output State  
Full scale  
Midscale  
1 LSB  
63  
32  
1
231  
5075  
9918  
10075  
0
Zero scale  
The typical distribution of RAB from channel-to-channel  
matches about 0.15% within a given device. On the other  
hand, device-to-device matching is process-lot dependent with  
20% tolerance.  
Rev. 0 | Page 23 of 28  
 
 
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