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AD5262BRU200 PDF预览

AD5262BRU200

更新时间： 2024-01-04 22:57:33
品牌 Logo 应用领域
亚德诺 - ADI 转换器电位器数字电位计电阻器光电二极管PC
页数 文件大小 规格书
20页 841K
描述
1-/2-Channel 15 V Digital Potentiometers

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AD5262BRU200 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：16
Reach Compliance Code：unknown风险等级：5.83
Is Samacsys：N其他特性：IT CAN ALSO OPERATE FROM A SINGLE 4.5V TO 16.5V SUPPLY; ALSO REQUIRES A +2.7V TO +5.5V LOGIC SUPPLY
标称带宽：0.03 kHz控制接口：3-WIRE SERIAL
转换器类型：DIGITAL POTENTIOMETERJESD-30 代码：R-PDSO-G16
JESD-609代码：e0长度：5 mm
湿度敏感等级：1标称负供电电压：-5 V
功能数量：2位置数：256
端子数量：16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：30%最大电阻器端电压：5 V
最小电阻器端电压：-5 V座面最大高度：1.2 mm
标称供电电压：5 V表面贴装：YES
标称温度系数：35 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：200000 Ω
宽度：4.4 mmBase Number Matches：1

AD5262BRU200 数据手册

 浏览型号AD5262BRU200的Datasheet PDF文件第6页浏览型号AD5262BRU200的Datasheet PDF文件第7页浏览型号AD5262BRU200的Datasheet PDF文件第8页浏览型号AD5262BRU200的Datasheet PDF文件第10页浏览型号AD5262BRU200的Datasheet PDF文件第11页浏览型号AD5262BRU200的Datasheet PDF文件第12页 
AD5260/AD5262  
Note that in the zero-scale condition a finite wiper resistance of  
60 W is present. Care should be taken to limit the current flow  
between W and B in this state to no more than 20 mA to avoid  
degradation or possible destruction of the internal switches.  
Ax  
SHDN  
R
R
S
S
D7  
Like the mechanical potentiometer the RDAC replaces, the  
AD5260/AD5262 parts are totally symmetrical. The resistance  
between the wiper W and terminal A also produces a digitally  
controlled complementary resistance RWA. Figure 12 shows the  
symmetrical programmability of the various terminal connections.  
When RWA is used, the B–terminal can be let floating or tied to the  
wiper. Setting the resistance value for RWA starts at a maximum  
value of resistance and decreases as the data loaded in the latch  
is increased in value. The general equation for this operation is:  
D6  
D5  
D4  
D3  
D2  
D1  
D0  
R
S
Wx  
Bx  
RDAC  
LATCH  
AND  
256 - D  
256  
DECODE  
RWA D =  
¥ R AB + RW  
(2)  
(
)
R
S
N
DIGITAL CIRCUITRY  
R
= R /2  
AB  
S
For example, RAB = 20 kW, when VA = 0 V and B–terminal is open,  
the following output resistance RWA will be set for the following  
RDAC latch codes. The result will be the same if terminal B is  
tied to W:  
OMITTED FOR CLARITY  
Figure 11. Simplified RDAC Architecture  
PROGRAMMING THE VARIABLE RESISTOR  
Rheostat Operation  
D
RWA  
The nominal resistances of the RDAC between terminals A and B  
are available with values of 20 kW, 50 kW, and 200 kW. The final  
three digits of the part number determine the nominal resistance  
value, e.g., 20 kW = 20; 50 kW = 50; 200 kW = 200. The nominal  
resistance (RAB) of the VR has 256 contact points accessed by the  
wiper terminal, plus the B terminal contact. The 8-bit data in the  
RDAC latch is decoded to select one of the 256 possible settings.  
Assuming a 20 kW part is used, the wiper’s first connection starts  
at the B terminal for data 00H. Since there is a 60 W wiper contact  
resistance, such connection yields a minimum of 60 W resistance  
between terminals W and B. The second connection is the first tap  
point corresponds to 138 W (RWB = RAB/256 ꢁ RW = 78 W ꢁ 60 W)  
for data 01H. The third connection is the next tap point represent-  
ing 216 W (78 ꢂ 2 ꢁ 60) for data 02H and so on. Each LSB data  
value increase moves the wiper up the resistor ladder until the last  
tap point is reached at 19982 W [RAB ꢃ 1 LSB ꢁ RW]. The wiper  
does not directly connect to the B terminal. See Figure 11 for a  
simplified diagram of the equivalent RDAC circuit.  
(DEC)  
(W)  
Output State  
256  
128  
1
60  
Full-Scale  
Mid-Scale  
1 LSB  
10060  
19982  
20060  
0
Zero-Scale  
20  
16  
12  
8
R
R
WB  
WA  
The general equation determining the digitally programmed  
output resistance between W and B is:  
4
R
= 20K⍀  
AB  
D
0
RWB D =  
¥ R AB + RW  
(1)  
(
)
0
64  
128  
D – CODE in decimal  
192  
256  
256  
where D is the decimal equivalent of the binary code which is  
loaded in the 8-bit RDAC register, and RAB is the nominal end-  
to-end resistance.  
Figure 12. AD5260/AD5262 Equivalent RDAC Circuit  
The typical distribution of the nominal resistance RAB from  
channel to channel matches within ±1%. Device-to-device match-  
ing is process lot dependent with the worst case of ±30% variation.  
On the other hand, since the resistance element is processed in  
thin film technology, the change in RAB with temperature has a  
low 35 ppm/∞C temperature coefficient.  
For example, RAB = 20 kW, when VB = 0 V and A–terminal is  
open circuit, the following output resistance values RWB will be  
set for the following RDAC latch codes. The result will be the  
same if terminal A is tied to W:  
D
RWB  
(DEC) (W)  
Output State  
256  
128  
1
19982  
10060  
138  
Full-Scale (RAB – 1 LSB + RW)  
Mid-Scale  
1 LSB  
0
60  
Zero-Scale (wiper contact resistance)  
REV. 0  
–9–  
1...6789101112...20

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