MAX31826MUA+T【PDF 8/22 页】IC TEMP SENSOR DIGITAL 8UMAX

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Sheet目录42

4页 5页 6页 7页 [8页]9页 10页 11页 12页

? Maxim Integrated Products 8

MAX31826

1-Wire Digital Temperature Sensor

with 1Kb Lockable EEPROM

64-Bit ROM Code

Each device contains a unique 64-bit code stored in ROM

(Figure 3). The least significant 8 bits of the ROM code

contain the devices 1-Wire family code, 3Bh. The next 48

bits contain a unique serial number. The most significant

8 bits contain a cyclic redundancy check (CRC) byte that

is calculated from the first 56 bits of the ROM code. See

the CRC Generation section for a detailed explanation

of the CRC bits. The 64-bit ROM code and associated

ROM function control logic allow the device to operate as

a 1-Wire device using the protocol detailed in the 1-Wire

Bus System section.

Figure 1. Supplying the Parasite-Powered MAX31826 During Temperature Conversions

Figure 2. Powering the MAX31826 with an External Supply

Figure 3. 64-Bit ROM Code

礟

4.7k&

1-Wire BUS

TO OTHER 1-Wire DEVICES

MAX31826

GND

礟

4.7k&

1-Wire BUS

TO OTHER 1-Wire DEVICES

(EXTERNAL SUPPLY)

MAX31826

GND

MSb

8-BIT

CRC CODE

48-BIT SERIAL NUMBER

MSb

LSb

8-BIT FAMILY CODE

(3Bh)

MSb

LSb

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