參數(shù)資料
型號: X9317ZM8I-2.7
廠商: INTERSIL CORP
元件分類: 數(shù)字電位計(jì)
英文描述: Low Noise, Low Power, 100 Taps
中文描述: 1K DIGITAL POTENTIOMETER, INCREMENT/DECREMENT CONTROL INTERFACE, 100 POSITIONS, PDSO8
封裝: PLASTIC, MO-187AA, MSOP-8
文件頁數(shù): 11/15頁
文件大小: 333K
代理商: X9317ZM8I-2.7
11
FN8183.1
September 9, 2005
Applications Information
Electronic digitally controlled (XDCP) potentiometers provide
three powerful application advantages; (1) the variability and
reliability of a solid-state potentiometer, (2) the flexibility of
computer-based digital controls, and (3) the retentivity of
nonvolatile memory used for the storage of multiple
potentiometer settings or data.
Basic Configurations of Electronic Potentiometers
Basic Circuits
V
REF
R
W
V
REF
I
Three terminal potentiometer;
variable voltage divider
Two terminal variable resistor;
variable current
R
H
R
L
Cascading Techniques
Buffered Reference Voltage
-
+
+5V
R
1
+V
V
REF
V
OUT
LMC7101
R
W
R
W
+V
+V
+V
X
(a)
(b)
V
OUT
= V
W
/R
W
Single Supply Inverting Amplifier
Voltage Regulator
R
1
R
2
I
adj
V
O
(REG) = 1.25V (1+R
2
/R
1
)+I
adj
R
2
V
O
(REG)
V
IN
317
Offset Voltage Adjustment
+
-
V
S
V
O
R
2
R
1
100k
10k
10k
10k
+5V
LMC7101
Comparator with Hysteresis
V
UL
= {R
1
/(R
1
+R
2
)} V
O
(max)
V
LL
= {R
1
/(R
1
+R
2
)} V
O
(min)
+
-
R
1
V
O
LMC7101
+
-
V
S
V
O
R
2
R
1
}
LT311A
(for additional circuits see AN115)
+5V
R
2
+5V
100K
100K
+5V
V
S
V
O
= (R2/R1)V
S
R
W
}
X9317
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