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參數(shù)資料
| 型號(hào)： | DS1804 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | NV Trimmer Potentiometer(非易失性微調(diào)電位器) |
| 文件頁數(shù)： | 2/6頁 |
| 文件大?。?/td> | 49K |
| 代理商： | DS1804 |
DS1804
121797 2/6
OPERATION
The DS1804 is a single nonvolatile potentiometer. The
device has a total of 100 tap–points including the L– and
H– terminals. A total of 99 resistive segments exist
between the L– and H– terminals. These tap–points are
accessible to the W–terminal whose position is con-
trolled via a 3–terminal control port. A block diagram of
the DS1804 is shown in Figure 1.
The 3–terminal port of the DS1804 provides an incre-
ment/decrement interface which is activated via a chip
select input. This interface consists of the input signals
CS, INC, and U/D. These input signals control a 7–bit
up/down counter. The output of the 7–bit up/down
counter controls a 1 of 100 decoder to select wiper posi-
tion. Additionally, this interface provides for a wiper stor-
age operation using the CS and INC input control pins.
The timing diagram for the 3–terminal interface control
is shown in Figure 2.
PIN DESCRIPTIONS
V
CC
–
Power Supply Terminal. The DS1804 will sup-
port supply voltages ranging from +2.7 to +5.5 volts.
GND –
Ground Terminal.
H –
High–end of Resistor. This is the high–end terminal
of the potentiometer. It is not required that this terminal
be connected to a potential greater than the L–terminal.
Voltage applied to the H–terminal can not exceed the
power–supply voltage, V
CC
, or go below ground.
L –
Low–end of Resistor –This is the low–end terminal
of the potentiometer. It is not required that this terminal
be connected to a potential less than the H–terminal.
Voltage applied to the L–terminal cannot exceed the
power–supply voltage, V
CC
, or go below ground.
W –
Wiper of the Potentiometer. This pin is the wiper
terminal of the potentiometer. Its position on the resistor
array is controlled by the 3–terminal control port. Volt-
age applied to the W–terminal cannot exceed the pow-
er–supply voltage, V
CC
, or go below ground.
CS –
Chip Select. The CS input is used to activate the
control port of the DS1804. This input is active low.
When in a high–state, activity on the INC and U/D port
pins will not affect or change wiper position.
INC –
Wiper Movement Control. This input provides for
wiper position changes when the CS pin is low. Wiper
position changes of the W–terminal will occur one posi-
tion per high–to–low transition of this input signal. Posi-
tion changes will not occur if the CS pin is in a high–
state.
U/D –
Up/Down Control. This input sets the direction of
wiper movement. When in a high–state and CS is low,
any high–to–low transition on INC will cause a one
position movement of the wiper towards the H–terminal.
When in a low–state and CS is low, any high–to–low
transitions on INC will cause the position of the wiper to
move towards the L–terminal.
DS1804 BLOCK DIAGRAM
Figure 1
3-TERMINAL
CONTROL PORT
GND
CONTROL LOGIC
UNIT
NV MEMORY
1
POS 99
POS 0
H
L
W
CS
INC
U/D
V
CC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1804_11 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Nonvolatile Trimmer Potentiometer Operates from 3V or 5V Supplies |
| DS1804-010 | 功能描述:數(shù)字電位計(jì) 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(chǔ)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| DS1804-010+ | 功能描述:數(shù)字電位計(jì) IC NV Trimmer 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(chǔ)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| DS1804050 | 制造商:Maxim Integrated Products 功能描述: |
| DS1804-050 | 功能描述:數(shù)字電位計(jì) 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(chǔ)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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