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參數資料
| 型號： | CAT5110 |
| 元件分類： | 數字電位計 |
| 英文描述： | 32-Tap MiniPot Digitally Programmable Potentiometers with 2-Wire Interface |
| 中文描述： | 32抽頭的2線接口MiniPot數字可編程電位器 |
| 文件頁數： | 7/11頁 |
| 文件大小： | 163K |
| 代理商： | CAT5110 |
CAT5110/5118/5119
7
Doc. No. 2120, Rev. A
FUNCTIONAL DESCRIPTION
The CAT5110/5118/5119 consist of a fixed resistor and
a wiper contact with 32-tap points that are digitally
controlled through a 2-wire up/down serial interface.
Three end-to-end resistance values are available: 10k
,
50k
and 100k
.
The CAT5110 is designed to operate as a potentiometer.
In this configuration, the low terminal of the resistor array
is connected to ground (pin 2).
The CAT5118 performs as a variable resistor. In this
device, the wiper terminal and high terminal of the
resistor array is connected at pin 5. The CAT5119 is a
similar variable resistor, except the low terminal is
connected to pin 5.
Digital Interface Operation
The Minipots have two modes of operation when the
serial interface is active: increment and decrement
mode. The serial interface is only active when
CS
is
low.
The
CS
and U/
D
inputs control the position of the wiper
along the resistor array. When
CS
transitions from high
to low, the part will go into increment mode if U/
D
input
is high, and into decrement mode when U/
D
input is low.
Once the mode is set, the device will remain in that mode
until
CS
goes high again. A low-to-high transition at the
U/
D
pin will increment or decrement the wiper position
depending on the current mode (Figures 1 and 2).
When the
CS
input transitions to high (serial interface
inactive), the value of the counter is stored and the wiper
position is maintained.
Note that when the wiper reaches the maximum (or
minimum) tap position, the wiper will not wrap around to
the minimum (or maximum) position.
Power-On Reset
All parts in this family feature power-on reset (POR)
circuitry that sets the wiper position to midscale at
power-up. By default, the chip is in the increment mode.
CS
U/D
W
t
CU
t
IL
t
IH
t
IC
t
SETTLE
t
CI
t
SETTLE
Note: "W" is not a digital signal. It represents wiper transitions.
CS
U/D
W
t
CU
t
IL
t
IH
t
SETTLE
t
IC
t
CI
t
SETTLE
Note: "W" is not a digital signal. It represents wiper transitions.
Figure 2. Serial Interface Timing Diagram, Decrement Mode
Figure 1. Serial Interface Timing Diagram, Increment Mode
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相關代理商/技術參數 |
參數描述 |
|---|---|
| CAT5110_07 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:32-Tap MiniPot⑩ Digitally Programmable Potentiometers with 2-Wire Interface |
| CAT5110_08 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:32-Tap MiniPot⑩ Digitally Programmable Potentiometers with 2-Wire Interface |
| CAT5110B | 制造商:Datak Corporation 功能描述: |
| CAT5110SBI-00-T | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:32-Tap MiniPot Digitally Programmable Potentiometers with 2-Wire Interface |
| CAT5110SBI-00-T10 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:32-Tap MiniPot Digitally Programmable Potentiometers with 2-Wire Interface |
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