- 您现在的位置：买卖IC网 > PDF目录373873 > AD5251BRU100 (ANALOG DEVICES INC) 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23 PDF资料下载
参数资料
| 型号： | AD5251BRU100 |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 数字电位计 |
| 英文描述： | 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23 |
| 中文描述： | DUAL 100K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 64 POSITIONS, PDSO14 |
| 封装： | MO-153AB-1, TSSOP-14 |
| 文件页数： | 23/28页 |
| 文件大小： | 859K |
| 代理商： | AD5251BRU100 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页当前第23页第24页第25页第26页第27页第28页
AD5251/AD5252
Rev. 0 | Page 23 of 28
(
D (Code in Decimal)
0
0
25
50
75
100
0
16
32
48
63
R
WA
R
WB
Figure 42. AD5251 R
WA
(D) and R
WB
(D) vs. Decimal Code
Table 13. R
WB
vs. Codes; R
AB
= 10 k, A Terminal = Open
D (DEC)
R
WB
()
Output State
63
9918
Full scale
32
5075
Midscale
1
231
1 LSB
0
75
Zero scale (wiper resistance)
Note that in the zero-scale condition, a 75 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 k, or a ±20 mA
pulse, to avoid degradation or possible destruction of the
internal switch contact.
Similar to the mechanical potentiometer, the resistance of the
RDAC between Wiper W and Terminal A also produces a
digitally controlled complementary resistance, R
WA
. When these
terminals are used, the B terminal can be opened. Setting the
resistance value for R
WA
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
AD5251:
R
WA
(
D
) = [(64 –
D
)/64] ×
R
AB
+ 75
(3)
AD5252:
R
WA
(
D
) = [(256 –
D
)/256] ×
R
AB
+ 75
(4)
Table 14. R
WA
vs. Codes; AD5251, R
AB
=10 k, B Terminal
Open
D (DEC)
R
WA
()
63
231
32
5075
1
9918
0
10075
Output State
Full scale
Midscale
1 LSB
Zero scale
The typical distribution of R
AB
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.
PROGRAMMABLE POTENTIOMETER OPERATION
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).
0
A
B
W
V
I
V
C
Figure 43. Potentiometer Mode Configuration
If the wiper resistance is ignored, the transfer function is simply
AD5251:
B
AB
W
V
V
D
V
+
×
=
64
(5)
AD5252:
B
AB
W
V
V
D
V
+
×
=
256
(6)
A more accurate calculation, which includes the wiper
resistance effect, yields
A
W
AB
W
AB
N
W
V
R
R
R
R
D
2
D
V
2
)
(
+
+
=
(7)
Where 2
N
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
/2
N
with a
relatively small error contributed by the
R
W
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
R
W
dominates.
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 |V
A
|, |V
W
|, and |V
B
| do not
exceed V
DD
to V
SS
.
相关PDF资料 |
PDF描述 |
|---|---|
| AD5251BRU100-RL7 | 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23 |
| AD5251BRU50-RL7 | 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23 |
| AD5252 | 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23 |
| AD5252BRU1 | 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23 |
| AD5252BRU1-RL7 | TRANS ARRAY PNP/PNP W/RES S MINI |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5251BRU100-RL7 | 功能描述:IC DCP DUAL 100K 64POS 14TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
| AD5251BRU10-RL7 | 功能描述:IC DCP DUAL 10K 64POS 14TSSOP TR RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
| AD5251BRU1-RL7 | 功能描述:IC DCP DUAL 1K 64POS 14TSSOP T/R RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
| AD5251BRU50 | 制造商:Analog Devices 功能描述:Digital Potentiometer 64POS 50KOhm Dual 14-Pin TSSOP 制造商:Analog Devices 功能描述:DGTL POTENTIOMETER 64POS 50KOHM DUAL 14TSSOP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述:6-BIT I2C EEMEM DIGIPOT - Bulk |
| AD5251BRU50-RL7 | 功能描述:IC DCP DUAL 50K 64POS 14TSSOP TR RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。