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参数资料
| 型号： | DS18B20-PAR+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 4/19页 |
| 文件大小： | 221K |
| 描述： | IC THERM MICROLAN PROG-RES TO-92 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 功能： | 温度计，恒温计 |
| 传感器类型： | 内部 |
| 感应温度： | -55°C ~ 100°C |
| 精确度： | ±2°C（最小值） |
| 拓扑： | 寄存器库，变签式暂存器 |
| 输出类型： | 1-Wire? |
| 输出警报： | 是 |
| 输出风扇： | 无 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -55°C ~ 100°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-226-3、TO-92-3（TO-226AA）成形引线 |
| 供应商设备封装： | TO-92-3 |
| 包装： | 带卷 (TR) |
DS18B20-PAR
4 of 19
resolution, bits 1 and 0 are undefined, and for 9-bit resolution bits 2, 1 and 0 are undefined. Table 2 gives
examples of digital output data and the corresponding temperature reading for 12-bit resolution
conversions.
TEMPERATURE REGISTER FORMAT Figure 3
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
LS Byte
2
3
2
2
2
1
2
0
2
-1
2
-2
2
-3
2
-4
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
MS Byte
S
S
S
S
S
2
6
2
5
2
4
TEMPERATURE/DATA RELATIONSHIP Table 2
TEMPERATURE DIGITAL OUTPUT
(Binary)
DIGITAL OUTPUT
(Hex)
+85癈*
0000 0101 0101 0000
0550h
+25.0625癈
0000 0001 1001 0001
0191h
+10.125癈
0000 0000 1010 0010
00A2h
+0.5癈
0000 0000 0000 1000
0008h
0癈
0000 0000 0000 0000
0000h
-0.5癈
1111 1111 1111 1000
FFF8h
-10.125癈
1111 1111 0101 1110
FF5Eh
-25.0625癈
1111 1110 0110 1111
FE6Fh
-55癈
1111 1100 1001 0000
FC90h
*The power-on reset value of the temperature register is +85癈
OPERATION ALARM SIGNALING
After the DS18B20-PAR performs a temperature conversion, the temperature value is compared to the
user-defined twos complement alarm trigger values stored in the 1-byte T
H
and T
L
registers (see Figure
4). The sign bit (S)
indicates if the value is positive or negative: for positive numbers S = 0 and for
negative numbers S = 1. The T
H
and T
L
registers are nonvolatile (EEPROM) so they will retain data
when the device is powered down. T
H
and T
L
can be accessed through bytes 2 and 3 of the scratchpad as
explained in the MEMORY section of this datasheet.
T
H
AND T
L
REGISTER FORMAT Figure 4
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
S
2
6
2
5
2
4
2
3
2
2
2
1
2
0
Only bits 11 through 4 of the temperature register are used in the T
H
and T
L
comparison since T
H
and T
L
are 8-bit registers. If the result of a temperature measurement is higher than or equal to T
H
or lower than
or equal to T
L
, an alarm condition exists and an alarm flag is set inside the DS18B20-PAR. This flag is
updated after every temperature measurement; therefore, if the alarm condition goes away, the flag will
be turned off after the next temperature conversion.
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| DS18B20-SL+T&R | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL SERL (1-WIRE) - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN PROG-RES TO-92 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
| DS18B20-SL+T&R | 功能描述:板上安装温度传感器 Prgmble Resolution 1-Wire Parasite Pwr RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS18B20U | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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