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參數(shù)資料
| 型號： | DS1867E-010/T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT W/EEPROM DUAL 10K 20TSSOP |
| 標準包裝： | 2,500 |
| 接片： | 256 |
| 電阻（歐姆）： | 10k |
| 電路數(shù)： | 2 |
| 溫度系數(shù)： | 標準值 750 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | 3 線串口 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 20-TSSOP |
| 包裝： | 帶卷 (TR) |
DS1867
2 of 14
102199
DESCRIPTION
The DS1867 Dual Digital Potentiometer with EEPROM is the nonvolatile version of the popular DS1267
Dual Digital Potentiometer. The DS1867 consists of two digitally controlled potentiometers having 256-
position wiper settings. Wiper position is maintained in the absence of power through the use of
EEPROM memory cell arrays. Communication and control of the device are accomplished over a 3-wire
serial port which allows reads and writes of the wiper position. Both potentiometers can be stacked for
increased total resistance with the same resolution. For multiple-device, single-processor environments,
the DS1867 can be cascaded for control over a single 3-wire bus. The DS1867 is offered in three standard
resistance values.
OPERATION
The DS1867 contains two 256-position potentiometers whose wiper positions are set by an 8-bit value.
These two 8-bit values are written to a 17-bit I/O shift register which is used to store wiper position and
the stack select bit when the device is powered. An additional memory area, the shadow memory, stores
the 17-bit I/O shift register during a power-down sequence which provides for wiper nonvolatility. A
block diagram of the DS1867 is presented in Figure 1.
Communication and control of the DS1867 is accomplished through a 3-wire serial port interface that
drives an internal control logic unit. The 3-wire serial interface consists of the three input signals: RST ,
CLK, and DQ.
The RST control signal is used to enable 3-wire serial port operation of the device. The RST signal is an
active high input and is required to begin any communication to the DS1867. The CLK signal input is
used to provide timing synchronization for data input and output. The DQ signal line is used to transmit
potentiometer wiper settings and the stack select bit configuration to the 17-bit I/O shift register of the
DS1867.
Figure 2(a) presents the 3-wire serial port protocol. As shown, the 3-wire port is inactive when the RST
signal input is low. Communication with the DS1867 requires the transition of the RST input from a low
state to a high state. Once the 3-wire port has been activated, data is latched into the part on the low to
high transition of the CLK signal input. Three-wire serial timing requirements are provided in the timing
diagrams of Figure 2(b) and (c).
Data written to the DS1867 over the 3-wire serial interface is stored in the 17-bit I/O shift register (see
Figure 3). The 17-bit I/O shift register contains both 8-bit potentiometer wiper position values and the
stack select bit. The composition of the I/O shift register is presented in Figure 3. Bit 0 of the I/O shift
register contains the stack select bit. This bit will be discussed in the section entitled Stacked
Configuration. Bits 1 through 8 of the I/O shift register contain the potentiometer-1 wiper position value.
Bit 1 will contain the MSB of the wiper setting for potentiometer-1 and bit 8 the LSB for the wiper
setting. Bits 9 through 16 of the I/O shift register contain the value of the potentiometer-0 wiper position
with the MSB for the wiper position occupying bit 9 and the LSB bit 16.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1867E-050 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Potentiometer |
| DS1867E-050+T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC POT W/EEPROM DUAL 50K 20TSSOP |
| DS1867E-050+T&R | 功能描述:數(shù)字電位計 IC Dual w/EEPROM 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 |
| DS1867E-10 | 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 |
| DS1867E-10+ | 功能描述:數(shù)字電位計 IC Dual w/EEPROM 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 |
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