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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(yè)數(shù)： | 3/6頁(yè) |
| 文件大小： | 49K |
| 代理商： | DS1804 |
DS1804
121797 3/6
POWER–UP/POWER–DOWN CONDITIONS
On power–up the DS1804 will load the value of
EEPROM memory into the wiper position register (or 1
of 100 decoder). The value of this register can then be
set to another wiper position if desired, by using the
3–terminal control port. On power–up, wiper position
will be loaded within a maximum time period of 500
μ
s
once the power–supply is stable. Additionally, the 3–
terminal interface port will be active after 50 ms.
On power–down, the wiper position register data will be
lost. On the next device power–up, the value of
EEPROM memory will be loaded into the wiper position
register.
On shipment from the factory, Dallas Semiconductor
does not guarantee a specified EEPROM memory
value. This value should be set by the customer as
needed. The next section discusses wiper storage
operation for the DS1804.
NONVOLATILE WIPER STORAGE
Wiper position of the DS1804 can be stored using the
INC and CS inputs. Storage of the wiper position takes
place, whenever the CS input transitions from low–to–
high while the INC is high. Once this condition has
occurred the value of the current wiper position will be
written to EEPROM memory.
The DS1804 is specified to accept 50,000 writes to
EEPROM before a wear–out condition. After wear out
the DS1804 will still function and wiper position can be
changed during powered conditions using the 3–termi-
nal control port. However, on power–up the wiper–posi-
tion will be indeterminate.
ONE TIME PROGRAMMABILITY (OTP)
The DS1804 can be easily used as an OTP device. The
user of the DS1804 can trim the desired value of the
wiper position and set this position for storage as
described above. Any activity through the 3–terminal
port can then be prevented by connecting the CS input
pin to V
CC
. Also, an OTP application does not
adversely affect the number of times EEPROM is writ-
ten, since EEPROM will only be loaded and
not written
during a power–up or power–down condition.
On power–up the DS1804 will load the current value of
EEPROM memory into the wiper position register.
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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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