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| 型号： | DS2890X-000 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 25/27页 |
| 文件大小： | 0K |
| 描述： | IC POT DIGITAL 1-WIRE 100K CSP |
| 标准包装： | 10,000 |
| 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-XBGA，FCBGA |
| 供应商设备封装： | 6-覆晶（2.82x2.54） |
| 包装： | 带卷 (TR) |
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DS2890
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POWER and CONFIGURATION CONSIDERATIONS
1-Wire devices can typically derive operating power entirely from the 1-Wire bus by storing energy on an
internal capacitor during periods of time when the 1-Wire bus is in a high state. During bus low times the
device continues to operate from the energy stored on the internal capacitor; the capacitor is then
recharged when the bus returns to a high state. This technique of operating entirely from the 1-Wire bus
by powering from energy stored on an internal capacitor during bus low times in known as “parasite
powered” operation.
Special consideration is required with the DS2890 in that it supports two power
configurations and two related digital resistor modes: Potentiometer Configuration and Variable Resistor
Configuration. The Potentiometer Configuration requires the presence of a VDD power source to supply
the power needs of the device charge pump which must be turned on to support a terminal-to-terminal
wiper output range. The Variable Resistor configuration is supported with or without a VDD source or
enabled charge pump although resistance range, as described below, is influenced by the charge pump
state.
POTENTIOMETER CONFIGURATION
To configure and operate the DS2890 as a potentiometer as shown in Figure 5 requires the TSOC, a VDD
power source, and the device charge pump turned on (Control Register, bit CPC=1). The charge pump
must be enabled to support RL to RH terminal voltage swings at the WIPER output and as described
previously, a VDD supply must be provided to support the power requirements of the charge pump.
Figure 5. Potentiometer Configuration
RH
WIPER
RL
VDD
1-WIRE
GND
2.8V to 6.0V
Bus
Master
VARIABLE RESISTOR CONFIGURATION
The Variable Resistor configuration as shown in Figure 6 is supported by all package types with or
without an external VDD supply. As described previously, without a VDD source the charge pump must
be disabled.
Figure 6. Variable Resistor Configurations
(TO92 Package)
RH
WIPER
RL
VDD
1-WIRE
GND
2.8V to 6.0V
or
No Connect
2.8V to 6.0V
Bus
Master
RH
1-WIRE
GND
2.8V to 6.0V
Bus
Master
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS28CM00 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:IC/SMBus Silicon Serial Number |
| DS28CM00EVKIT | 制造商:Maxim Integrated Products 功能描述:DS28CM00 EV-BOARD W/ MAXQ BOARD - Rail/Tube |
| DS28CM00R-A00+T | 功能描述:序列号注册 I2C/SMBus Silicon Serial Number RoHS:否 制造商:Maxim Integrated 数据总线宽度: 电源电压-最大: 电源电压-最小: 最大工作温度: 最小工作温度: 安装风格: 封装 / 箱体: |
| DS28CM00R-A00+U | 制造商:Maxim Integrated Products 功能描述:SMBUS SILICON SERIAL NUMBER 制造商:Maxim Integrated Products 功能描述:SMBUS INTRFC 5PIN SOT-23 - Rail/Tube 制造商:Maxim Integrated Products 功能描述:SILICON SERIAL NUMBER, 5-SOT23 制造商:Maxim Integrated Products 功能描述:SILICON SERIAL NUMBER, 5-SOT23, IC Function:Silicon Serial Number IC, Brief Feat |
| DS28CN01 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1Kbit IC/SMBus EEPROM with SHA-1 Engine |
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