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參數(shù)資料
| 型號： | DS4301 |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | Nonvolatile, 32-Position Digital Potentiometer |
| 中文描述： | 非易失、32抽頭數(shù)字電位器 |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 150K |
| 代理商： | DS4301 |
D
Detailed Description
The DS4301 is a single nonvolatile digital potentiome-
ter. This 32-position linear potentiometer has an end-to-
end resistance of 200k
, and operates over a wide
2.4V to 5.5V supply voltage range. The wiper position is
controlled by the three interface pins (U/
D
,
CS
, and
INC
), and the wiper setting can be stored in EEPROM
on command.
Power-Up
On power-up, once a stable supply voltage of V
CC MIN
has been reached, the stored wiper setting is loaded
from the EEPROM within t
WLT
. Also on power-up, the
DS4301 wiper control pins become active approximate-
ly t
PU
after a stable supply voltage of V
CC MIN
has
been reached.
Wiper Control
Adjusting the wiper of the DS4301 involves using the
three control pins (U/
D
,
CS
, and
INC
). See the
Timing
Diagram
in Figure 2. To enable wiper adjustment, a
high-to-low transition on the
CS
pin is required. Hold
CS
low for the duration of the communication. Doing
this enables the
INC
pin to change the wiper position.
Set the U/
D
pin high to increment or low to decrement
the wiper position. The state of the U/
D
pin should be
set more than t
DI
before the
INC
signal is transitioned
from high to low. After the
CS
pin is active low, a high-
to-low transition on the
INC
pin moves the wiper in the
direction dictated by the U/
D
pin. Continue to pulse
INC
(high to low) until the desired wiper position is
reached. On the last edge, hold the
INC
line low. With
the desired wiper position set, there are two ways to
proceed. One method terminates communication with-
out allowing the value of the current wiper position to
be written to the EEPROM. This is done by transitioning
the
CS
signal to the high state before bringing the
INC
signal high. As long as the state of the
CS
pin is high
before the state of the
INC
pin goes high, the current
wiper setting is not written to EEPROM. Because the
current wiper setting was not stored to the NV memory,
the previously stored wiper setting, not the current
wiper setting, is loaded from memory if power is cycled
to the device
The other method is used to store a new wiper setting
in the EEPROM. This is done by bringing the state of
the
INC
pin high for a time of t
IC
before bringing the
state of the
CS
pin high. Once the states of both
CS
and
INC
pins are high, the current wiper setting is
stored in EEPROM after a time of t
WST
. If power is
Nonvolatile, 32-Position Digital Potentiometer
6
_____________________________________________________________________
V
CC
GND
CS
INC
U/D
CONTROL
LOGIC UNIT
NONVOLATILE
MEMORY
5-BIT
WIPER
SETTING
POS 31
POS 0
H
L
W
V
CC
Figure 1. Block Diagram
CS
INC
U/D
t
CI
t
IL
t
IH
t
F
t
IC
t
WST
t
CPH
t
DI
t
R
WIPER STORAGE
CONDITION
WIPER NON-STORAGE
CONDITION
WIPER POSITION
POSITION X
POSITION X + 1
POSITION X
t
IW
t
IW
t
IK
POSITION X - 1
VIL
V
IL
V
IL
V
IH
V
IH
t
CLP
Figure 2. Timing Diagram
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS4301U-200 | 功能描述:數(shù)字電位計 IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| DS4301U-200/T&R | 制造商:Maxim Integrated Products 功能描述:IC POT DIG NV 200K 32POS 8-USOP |
| DS4301U-200/T&R | 功能描述:數(shù)字電位計 IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| DS4301U-200+ | 功能描述:數(shù)字電位計 IC Nonvolatile 32-Position RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| DS4301U-200+T&R | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 32POS 200KOHM SGL 8USOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:Digital Potentiometer ICs Nonvolatile 32-Position |
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