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參數(shù)資料
| 型號(hào)： | DS1267S-050 |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 5/12頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DUAL DIGITAL 50K 16-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 45 |
| 接片： | 256 |
| 電阻（歐姆）： | 50k |
| 電路數(shù)： | 2 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 750 ppm/°C |
| 存儲(chǔ)器類(lèi)型： | 易失 |
| 接口： | 3 線(xiàn)串口 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC W |
| 包裝： | 管件 |
| 其它名稱(chēng)： | DS1267S050 |
DS1267
2 of 12
102199
DESCRIPTION
The DS1267 Dual Digital Potentiometer Chip consists of two digitally controlled, solid-state
potentiometers. Each potentiometer is composed of 256 resistive sections. Between each resistive section
and both ends of the potentiometer are tap points which are accessible to the wiper. The position of the
wiper on the resistive array is set by an 8-bit value that controls which tap point is connected to the wiper
output. Communication and control of the device are accomplished via a 3-wire serial port interface.
This interface allows the device wiper position to be read or written.
Both potentiometers can be connected in series (or stacked) for an increased total resistance with the
same resolution. For multiple-device, single-processor environments, the DS1267 can be cascaded or
daisy-chained. This feature provides for control of multiple devices over a single 3-wire bus.
The DS1267 is offered in three standard resistance values which include 10, 50, and 100-kohm versions.
Available packages for the device include a 14-pin DIP, 16-pin SOIC, and 20-pin TSSOP.
OPERATION
The DS1267 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 that is used to store the two wiper positions
and the stack select bit when the device is powered. A block diagram of the DS1267 is presented in
Figure 1.
Communication and control of the DS1267 are 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 the 3-wire serial port operation of the device. The chip is
selected when RST is high; RST must be high to begin any communication to the DS1267. 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 DS1267.
Figure 9(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 DS1267 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 entered into the part on the low to
high transition of the CLK signal inputs. Three-wire serial timing requirements are provided in the timing
diagrams of Figure 9(b)-(c).
Data written to the DS1267 over the 3-wire serial interface is stored in the 17-bit I/O shift register (see
Figure 2). 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 2. Bit 0 of the I/O shift
register contains the stack select bit, which 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 contains 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(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1267S-050/T&R | 制造商:Maxim Integrated Products 功能描述:DIGITAL RESISTOR 50K OHM SOIC TRL - Tape and Reel 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC DGTL POT 50K 2CH 16SOIC |
| DS1267S-050/T&R | 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 |
| DS1267S-050/TR | 制造商:DALLAS 制造商全稱(chēng):Dallas Semiconductor 功能描述:Dual Digital Potentiometer Chip |
| DS1267S-050+ | 功能描述:數(shù)字電位計(jì) IC Dual +/-5V 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 |
| DS1267S-050+T&R | 制造商:Maxim Integrated Products 功能描述:Digital Potentiometer ICs Dual +/-5V |
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