參數(shù)資料
型號(hào)： DS1922L-F5
英文描述： Temperature Logger iButton With 8kB Datalog Memory
中文描述： 溫度記錄儀iButton的記憶與8kB的數(shù)據(jù)記錄
文件頁(yè)數(shù)： 48/48頁(yè)
文件大?。?/td> 428K
代理商： DS1922L-F5
DS1922L/DS1922T
48 of 48
STEP 1, PREPARATION
Read the 64-bit ROM to obtain the family code. If family code 41h then stop (wrong device).
Read the Configuration Byte at address 0226h.
If code = 40h then Tr1 = 60, Offset = 41
If code = 60h then Tr1 = 90, Offset = 1
For all other codes stop (wrong device)
Tr2 = Tr2H/2 + Tr2L/512 - Offset
Tr3 = Tr3H/2 + Tr3L/512 - Offset
Tc2 = Tc2H/2 + Tc2L/512 - Offset
Tc3 = Tc3H/2 + Tc3L/512 - Offset
Err2 = Tc2 - Tr2
Err3 = Tc3 - Tr3
Err1 = Err2
B = (Tr2
- Tr1
2
) * (Err3 - Err1)/[(Tr2
2
- Tr1
2
) * (Tr3 - Tr1) + (Tr3
2
- Tr1
2
) * (Tr1 - Tr2)]
A = B * (Tr1 – Tr2) / (Tr2
- Tr1
)
C = Err1 - A * Tr1
- B * Tr1
(DS1922L)
(DS1922T)
(convert from binary to °C)
(convert from binary to °C)
(convert from binary to °C)
(convert from binary to °C)
STEP 2, EXECUTION
Tc = TcH/2 + TcL/512 - Offset
Tcorr = Tc - (A * Tc
2
+ B * Tc + C)
(convert from binary to °C)
(the actual correction)
Numerical Correction Example
Converted data from Calibration Memory
Tr1 = 60°C
Tr2 = -10.1297°C
Tr3 = 24.6483°C
Tc2 = -10.0625°C
Tc3 = 24.5°C
Error values
Err2 = 0.0672°C
Err3 = -0.1483°C
Err1 = 0.0672°C
Resulting Correction Coefficients
B = -0.008741
A = 0.000175/°C
C = -0.039332°C
Application of Correction Coefficients to sample reading
Tc = 22.500°C
Tcorr = 22.647°C
NOTE:
The software correction requires floating point arithmetic (24-bit or better). Suitable math libraries for
microcontrollers are found on various websites and are included in cross-compilers.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1922L-F5# 功能描述:iButton Temp Logger Ibutton w/8Kb Datalog Mem RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
DS1922L-F5#A20 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
DS1922L-F5#A22 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
DS1922L-F5#W 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
DS1922L-F5/A1E 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
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