- 您现在的位置：买卖IC网 > Sheet目录1212 > DS1780K (Maxim Integrated Products)KIT EVALUATION DS1780
DS1780
DS1780 MONITORING ORDER Table 3
TEMPERATURE READING
ANALOG +2.5 V S /V CCP2
ANALOG +12V
ANALOG +5V
ANALOG +3.3V
ANALOG +2.5V
ANALOG +V CCP1
FAN1
FAN2
If conversions are terminated by either of the methods described in the “OPERATION - Configuration
Register” section, the current “round-robin” loop will be completed and the results stored in RAM.
Monitoring will then terminate. When the monitoring again commences, monitoring always starts with
the temperature reading.
OPERATION - Temperature Data Format
The DS1780 internally converts measured temperature data to a two’s complement data format (in °C).
The host can read the last completed temperature conversion at any time by setting the Internal Address
Register pointer to location 27h, and reading the 8 bits in the register. The format of the data is shown
below in Table 4. The MSb of the register represents the sign bit of the temperature reading. For
Fahrenheit usage, a lookup table or conversion routine must be used.
TEMPERATURE/DATA RELATIONSHIPS Table 4
S
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
TEMPERATURE
+125°C
+25°C
+1°C
0°C
-1°C
-25°C
-40°C
(unit = °C)
DIGITAL OUTPUT
(BINARY)
0111 1101
0001 1001
0000 0001
0000 0000
1111 1111
1110 0111
1101 1000
LSb
DIGITAL OUTPUT (HEX)
7Dh
19h
01h
00h
FFh
E7h
D8h
OPERATION - Voltage Data Format
The DS1780 contains inputs for directly monitoring the power supplies typically found in a PC (+12V, -
12V, +5V, +3.3V, +2.5V, +V CCP ). These inputs are scaled internally to a reference source, and converted
via an 8-bit Delta-Sigma ADC (Analog-to-Digital Converter), thus allowing for a more accurate means of
measurement since the voltages are referenced to a known value.
Since these inputs can be greater than V DD , they are not diode protected to the power rails. In addition,
small external series resistors such as 510 ? should be put into the lines driving the DS1780 to prevent
damaging the traces or power supplies should an accidental short connect two power supplies together.
8 of 28
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
DS1863K
KIT EVAL FOR DS1863
DS1864K
KIT EVAL FOR DS1864
DS21349DK
KIT DESIGN FOR DS21349
DS21352DK
KIT DESIGN FOR DS21352
DS21354DK
KIT DESIGN FOR DS21354
DS21458DK
KIT DESIGN FOR G511DS21458
DS2156DK
KIT DESIGN FOR DS2156
DS21Q348DK
KIT DESIGN FOR DS21Q348
相关代理商/技术参数
DS17885
制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clock
DS17885-3
功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube
DS17885-3+
功能描述:实时时钟 3V/5V RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube
DS17885-5
功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube
DS17885-5+
功能描述:实时时钟 3V/5V RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube
DS17885-DS17887
制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clock
DS17885E3
制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Real-Time Clocks
DS17885E-3
功能描述:实时时钟 3V/5V RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube