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参数资料
| 型号： | DS1921H-F5# |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/45页 |
| 文件大小： | 0K |
| 描述： | IBUTTON THERMOCHRON F5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| RoHS指令信息： | IButton RoHS Compliance Plan |
| 标准包装： | 8 |
| 系列： | iButton® |
| 存储容量： | 512B |
| 存储器类型： | NVSRAM（非易失 SRAM） |
| 产品目录页面： | 1431 (CN2011-ZH PDF) |
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DS1921H/Z
HISTOGRAM BIN AND TEMPERATURE CROSS-REFERENCE Figure 7
TEMPERATURE DS1921H TEMP. DS1921Z TEMP. HISTOGRAM BIN HISTOGRAM BIN
READING EQUIV. IN °C EQUIV. IN °C NUMBER ADDRESS
00h
01h
02h
03h
04h
05h
06h
07h
08h
F7h
F8h
F9h
FAh
FBh
FCh
FDh
FEh
FFh
14.500
14.625
14.750
14.875
15.000
15.125
15.250
15.375
15.500
45.375
45.500
45.625
45.750
45.875
46.000
46.125
46.250
46.375
-5.500
-5.375
-5.250
-5.125
-5.000
-4.875
-4.750
-4.625
-4.500
25.375
25.500
25.625
25.750
25.875
26.000
26.125
26.250
26.375
0
0
0
0
1
1
1
1
2
61
62
62
62
62
63
63
63
63
800h to 801h
800h to 801h
800h to 801h
800h to 801h
802h to 803h
802h to 803h
802h to 803h
802h to 803h
804h to 805h
87Ah to 87Bh
87Ch to 87Dh
87Ch to 87Dh
87Ch to 87Dh
87Ch to 87Dh
87Eh to 87Fh
87Eh to 87Fh
87Eh to 87Fh
87Eh to 87Fh
Since each data bin is 2 bytes it can increment up to 65535 times. Additional measurements for a bin that
has already reached its maximum value will not be counted; the bin counter will remain at its maximum
value. With the fastest sample rate of one sample every minute, a 2-byte bin is sufficient for up to 45 days
if all temperature readings fall into the same bin.
TEMPERATURE ALARM LOGGING
For some applications it may be essential to not only record temperature over time and the temperature
histogram, but also record when exactly the temperature has exceeded a predefined tolerance band and
for how long the temperature stayed outside the desirable range. The DS1921H/Z can log high and low
durations. The tolerance band is specified by means of the Temperature Alarm Threshold Registers,
addresses 20Bh and 20Ch in the register page. One can set a high and a low temperature threshold. See
section Temperature Conversion for the data format the temperature has to be written in. As long as the
temperature values stay within the tolerance band (i.e., are higher than the low threshold and lower than
the high threshold), the DS1921H/Z will not record any temperature alarm. If the temperature during a
mission reaches or exceeds either threshold, the DS1921H/Z will generate an alarm and set either the
Temperature High Flag (THF) or the Temperature Low Flag (TLF) in the Status Register (address 214h).
This way, if the search conditions (address 20Eh) are set accordingly, the master can quickly identify
devices with temperature alarms by means of the Conditional Search function (see ROM Function
Commands ). The device also generates a time stamp of when the alarm occurred and begins recording the
duration of the alarming temperature.
Time stamps and durations where the temperature leaves the tolerance band are stored in the address
range 0220h to 027Fh, as shown in Figure 8. This allocation allows recording 24 individual alarm events
13 of 45
相关PDF资料 |
PDF描述 |
|---|---|
| DS1921K# | KIT IBUTTON THERMOCHRON |
| DS1922E-F5# | IBUTTON TEMP LOGGER 4KBit F5 |
| DS1922L-F5# | IBUTTON TEMP LOGGER |
| DS1923-F5# | IBUTTON TEMP/HUMIDITY LOGGER F5 |
| DS1961S-F3# | IBUTTON EEPROM 1KBit F3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1921H-F5# | 功能描述:iButton Thermochron High Res iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1921H-F5/A1C | 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1921H-F5+A1C | 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1921H-F50 | 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1921K | 功能描述:存储器 IC 开发工具 RoHS:否 制造商:STMicroelectronics 产品:Reference Boards 工具用于评估:M24LR64-R 存储容量:64 kbit 存储类型:EEPROM 工作电源电压:1.8 V to 5.5 V |
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