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参数资料
| 型号： | DS2890P-000+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/27页 |
| 文件大小： | 0K |
| 描述： | IC POT DIGITAL 1-WIRE 100K 6TSOC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 4,000 |
| 接片： | 256 |
| 电阻（欧姆）： | 100k |
| 电路数： | 1 |
| 温度系数： | 标准值 800 ppm/°C |
| 存储器类型： | 易失 |
| 接口： | 1 线 串行 |
| 电源电压： | 2.8 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-LSOJ |
| 供应商设备封装： | 6-TSOC |
| 包装： | 带卷 (TR) |
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DS2890
14 of 27
FIGURE 15. BUS MASTER WITH DS2480B DRIVER
VDD
POL
RXD
TXD
VPP
1-W
GND
NC
DS2480B
+5V
to 1-WIRE connection
of DS2890
serial in
serial out
HOST CPU
serial
port
BUS MASTER
TRANSACTION SEQUENCE
The protocol for accessing the DS2890 via the 1-Wire port is as follows:
Initialization
ROM Function Command
Potentiometer Function Command
Transaction/Data
INITIALIZATION
All transactions on the 1-Wire bus begin with an initialization sequence. The initialization sequence
consists of a reset pulse transmitted by the bus master followed by presence pulse(s) transmitted by the
slave(s). The presence pulse lets the bus master know that the DS2890 is on the bus and is ready to
operate. For more details, see the “1-WIRE SIGNALING” section.
ROM FUNCTION COMMANDS
Once the bus master has detected a presence, it can issue one of the eight ROM function commands that
the DS2890 supports. All ROM function commands are 8 bits long. A list of these commands follows
(refer to Figure 20 and Figure 21 flowcharts):
READ ROM [33H]
This command allows the bus master to read the DS2890’s 8-bit family code, unique 48-bit serial
number, and 8-bit CRC. This command should only be used if there is a single slave on the bus. If more
than one slave is present on the bus, a data collision will occur when all slaves try to transmit at the same
time (open drain will produce a wired-AND result). The resultant family code and 48-bit serial number
read by the master will be invalid.
MATCH ROM [55H]
The match ROM command, followed by a 64-bit ROM sequence, allows the bus master to address a
specific DS2890 on a multi-drop bus. Only the DS2890 that exactly matches the 64-bit ROM sequence
will respond to the following memory function command. All slaves that do not match the 64-bit ROM
sequence will wait for a reset pulse. This command can be used with a single or multiple devices on the
bus.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2890T | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1-Wire Digital Potentiometer |
| DS2890T-000 | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS2890V | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1-Wire Digital Potentiometer |
| DS2890V-000 | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS2890X | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1-Wire Digital Potentiometer |
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