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參數(shù)資料
| 型號(hào)： | MAX31826MUA+T |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 20/22頁 |
| 文件大小： | 1648K |
| 描述： | IC TEMP SENSOR DIGITAL 8UMAX |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | 1-Wire® |
| 功能： | 溫度監(jiān)控系統(tǒng)（傳感器） |
| 傳感器類型： | 內(nèi)部 |
| 感應(yīng)溫度： | -55°C ~ 125°C |
| 精確度： | ±2°C |
| 拓?fù)洌?/td> | 寄存器庫，變簽式暫存器 |
| 輸出類型： | 1-Wire? |
| 輸出警報(bào)： | 無 |
| 輸出風(fēng)扇： | 無 |
| 電源電壓： | 3 V ~ 3.7 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
Maxim Integrated Products 20
MAX31826
1-Wire Digital Temperature Sensor
with 1Kb Lockable EEPROM
Operation Example
Table 3 shows an operation example in which there
are multiple devices on the bus using parasite power.
The bus master initiates a temperature conversion in a
specific MAX31826 and then reads Scratchpad 1 and
recalculates the CRC to verify the data.
Figure 13. Recommended Master Read-One Timing
Table 3. Operation Example
MASTER
MODE
DATA (LSB FIRST)
COMMENTS
Tx
Reset
Master issues reset pulse.
Rx
Presence
Devices respond with presence pulse.
Tx
F0h
Master issues Search ROM command
Tx
Reset
Master issues reset pulse.
Rx
Presence
Devices respond with presence pulse.
Tx
55h
Master issues Match ROM command for desired address
Tx
64-bit ROM code
Master sends device ROM code.
Tx
44h
Master issues Convert T command.
Tx
DQ line held high by
strong pullup
Master applies strong pullup to DQ for the duration of the conversion (t
CONV
).
Tx
Reset
Master issues reset pulse.
Rx
Presence
Devices respond with presence pulse.
Tx
55h
Master issues Match ROM command.
Tx
64-bit ROM code
Master sends device ROM code.
Tx
BEh
Master issues Read Scratchpad 1 command.
Rx
9 data bytes
Master reads entire Scratchpad 1 including CRC. The master then recalculates the CRC of
the first 8 data bytes from the scratchpad and compares the calculated CRC with the read
CRC (byte 9). If they match, the master continues; if not, the read operation is repeated.
V
PU
V
IH
OF MASTER
t
INIT
=
SMALL
t
RC
=
SMALL
MASTER SAMPLES
15祍
1-Wire BUS
GND
BUS MASTER PULLING LOW
RESISTOR PULLUP
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