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參數(shù)資料
| 型號： | MAX31826MUA+T |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 9/22頁 |
| 文件大?。?/td> | 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 |
| 拓撲： | 寄存器庫，變簽式暫存器 |
| 輸出類型： | 1-Wire? |
| 輸出警報： | 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 9
MAX31826
1-Wire Digital Temperature Sensor
with 1Kb Lockable EEPROM
Figure 4. Memory Map
Memory
The devices memory is organized as shown in Figure 4. The
memory consists of two SRAM scratchpads (Scratchpad 1
and Scratchpad 2) and 1Kb of EEPROM, which can serve
as general-purpose nonvolatile memory until locked.
All memory commands are described in detail in the
MAX31826 Function Commands section.
Byte 0 and byte 1 of Scratchpad 1 contain the least
significant byte and the most significant byte of the tem-
perature register, respectively. Byte 4 contains the con-
figuration information. Bytes 2, 3, 5, 6, and 7 are reserved
for internal use by the device and cannot be overwritten;
these bytes return all ones when read.
Byte 8 of Scratchpad 1 is read-only and contains the
CRC code for bytes 07 of the scratchpad. The device
generates this CRC using the method described in the
CRC Generation section.
Scratchpad 2 (the EE scratchpad) is used for writing to
the EEPROM. Scratchpad 2 consists of 8 bytes; write
data to Scratchpad 2 before copying it to the EEPROM.
Configuration Register
Byte 4 of Scratchpad 1 contains the configuration reg-
ister, which is organized as shown in Configuration
Register Format. The configuration register allows the
user to read the programmed value of the address pins.
The AD[3:0] bits report the pin-programmed location
information. Pins connected to DQ (in parasite power)
or V
DD
(when externally powered) are reported with
logic 1, and pins connected to GND are reported as
logic 0. Pins connected to DQ (in parasite power), V
DD
(when externally powered), or GND through a resistor are
valid logic 1s or logic 0s if the resistor is less than 10kI.
Unconnected or high-impedance ( > 10kI) connections
are indeterminate. Bits [7:4] are reserved for internal use
and cannot be overwritten; they return a 1 when read.
Configuration Register Format
Note: Bits [3:0] are programmed through the four location programming address pins, AD3AD0. Reading the configuration register
provides location information on up to 16 individual devices.
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
AD3
AD2
AD1
AD0
TEMPERATURE REGISTER LSB (50h)
BYTE 0
TEMPERATURE REGISTER MSB (05h)
BYTE 1
RESERVED (FFh)
BYTE 2
RESERVED (FFh)
BYTE 3
CONFIGURATION REGISTER*
BYTE 4
RESERVED (FFh)
BYTE 5
RESERVED (FFh)
BYTE 6
RESERVED (FFh)
BYTE 7
CRC
BYTE 8
SCRATCHPAD 2 (EE SCRATCHPAD)
BYTE 0
BYTE 0
*THE LOWER 4 BITS (AD[3:0]) OF THE CONFIGURATION REGISTER ARE HARDWIRED THROUGH AD0AD3.
BYTE 1
BYTE 1
...
...
BYTE 7
BYTE 7
SCRATCHPAD 1 (POWER-UP STATE
SHOWN IN PARENTHESES)
EEPROM
BYTES 00h07h
BYTES 08h0Fh
BYTES 10h17h
...
BYTES 70h77h
BYTES 78h7Fh
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