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參數(shù)資料
| 型號： | ISL12022MIBZ-TR5421 |
| 廠商： | Intersil |
| 文件頁數(shù)： | 17/31頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RTC/CALENDAR TEMP SNSR 20SOIC |
| 應用說明： | Addressing Power Issues in Real Time Clock Appls |
| 產品培訓模塊： | Solutions for Industrial Control Applications |
| 標準包裝： | 1,000 |
| 類型： | 時鐘/日歷 |
| 特點： | 警報器，夏令時，閏年，SRAM |
| 存儲容量： | 128B |
| 時間格式： | HH:MM:SS（12/24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | I²C，2 線串口 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 電壓 - 電源，電池： | 1.8 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 20-SOIC |
| 包裝： | 帶卷 (TR) |
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ISL12022MR5421
24
FN7576.3
June 7, 2012
DST Date Reverse
DstDtRv controls which Date DST ends. The format for the Date is
the same as for the RTC register, from 1 to 31. The default value
for DST Date Reverse is 00h. The DstDtRv is only effective if the
DwRvE = 0.
DST Hour Reverse
DstHrRv controls the hour that DST ends. The RTC hour and
DstHrFd registers have the same formats except there is no
Military bit for DST hour. The user sets the DST hour with the
same format as used for the RTC hour (AM/PM or MIL) but
without the MIL bit, and the DST will still advance as if the MIL bit
were there. The default value for DST hour Reverse is 00h.
TEMP Registers (TEMP)
The temperature sensor produces an analog voltage output
which is input to an A/D converter and produces a 10-bit
temperature value in degrees Kelvin. TK07:00 are the LSBs of the
code, and TK09:08 are the MSBs of the code. The temperature
result is actually the average of two successive temperature
measurements to produce greater resolution for the temperature
control. The output code can be converted to °C by first
converting from binary to decimal, dividing by 2, and then
subtracting 273d.
The practical range for the temp sensor register output is from 446d
to 726d, or -50°C to +90°C. The temperature compensation
function is only guaranteed over -40°C to +85°C. The TSE bit must
be set to “1” to enable temperature sensing.
NPPM Registers (NPPM)
The NPPM value is exactly 2x the net correction, in ppm, required
to bring the oscillator to 0ppm error. The value is the combination
of oscillator Initial Correction (IPPM) and crystal temperature
dependent correction (CPPM).
IPPM is used to compensate the oscillator offset at room
temperature and is controlled by the ITR0 and BETA registers. This
value is normally set during room temperature testing.
The CPPM compensates the oscillator frequency fluctuation over-
temperature. It is determined by the temperature (T), crystal
curvature parameter (ALPHA), and crystal turnover temperature
(XT0). T is the result of the temp sensor/ADC conversion, whose
decimal result is 2x the actual temperature in Kelvin. ALPHA is
from either the ALPHA (cold) or ALPHAH (hot) register depending
on T, and XT0 is from the XT0 register.
NPPM = IPPM(ITR0, BETA) + ALPHA x (T-T0)2
where
T is the reading of the ADC, result is 2 x temperature in degrees
Kelvin.
or
Note that NPPM can also be predicted from the FATR and FDTR
register by the relationship (all values in decimal):
NPPM = 2*(BETA*FATR - (FDTR-16)
XT0 Registers (XT0)
TURNOVER TEMPERATURE (XT<3:0>)
The apex of the Alpha curve occurs at a point called the turnover
temperature, or XT0. Crystals normally have a turnover
temperature between +20°C and +30°C, with most occurring
near +25°C.
The ISL12022MR5421 has a preset Turnover temperature
corresponding to the crystal in the module. This value is recalled
on initial power-up and is preset in device production. It is READ
ONLY and cannot be overwritten by the user.
Table 27 shows the values available, with a range from +17.5°C
to +32.5°C in +0.5°C increments. The default value is 00000b
or +25°C.
TABLE 25. TEMP REGISTER
TEMP
765
43
21
0
TK0L
TK07 TK06 TK05 TK04 TK03 TK02 TK01 TK00
TK0M
00
TK09 TK08
Temperature in °C
[(TK <9:0>)/2] - 273
=
(EQ. 3)
NPPM
IPPM
CPPM
+
=
NPPM
IPPM
ALPHA
T
T0
–
()
2
4096
----------------------------------------------------
+
=
(EQ. 4)
TABLE 26. TURNOVER TEMPERATURE
ADDR
7
6543210
2Ch
0
XT4XT3
XT2XT1
XT0
TABLE 27. XT0 VALUES
XT<4:0>
TURNOVER TEMPERATURE
01111
32.5
01110
32.0
01101
31.5
01100
31
01011
30.5
01010
30
01001
29.5
01000
29.0
00111
28.5
00110
28.0
00101
27.5
00100
27.0
00011
26.5
00010
26.0
00001
25.5
00000
25.0
ALPHA
α 2048
=
T2
298
() XT0
+
=
(EQ. 5)
T
596
XT0
+
=
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ISL12022MR5421 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Low Power RTC with Battery Backed SRAM, Integrated 5ppm |
| ISL12022M-R5421 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:High-Accuracy RTC Modules, Feature-Rich RTCs |
| ISL12023 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Low Power RTC with Battery-Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Daylight Saving |
| ISL12023IVZ | 功能描述:實時時鐘 REAL TIME CLK/CLNDR W/TEMP COM 14 L RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ISL12023IVZ-T | 功能描述:實時時鐘 REAL TIME CLK/CLNDR W/TEMP COM 14 L RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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