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參數(shù)資料
| 型號： | AD7415SRT-0REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | PLASTIC, SOT-23, 5 PIN |
| 文件頁數(shù)： | 10/11頁 |
| 文件大?。?/td> | 136K |
| 代理商： | AD7415SRT-0REEL7 |
AD7415
–8–
REV. PrB
Preliminary Technical Data
PRELIMINAR
Y
TECHNICAL
DA
TA
byte write operation, as shown in Figure 5. The write
operation consists of the serial bus address followed by the
address pointer byte. No data is written to any of the data
registers. A read operation is then performed to read the
register.
Writing a single byte of data to the Configuration Regis-
ter
The Configuration register is an 8-bit register so only one
byte of data can be written to it. Writing a single byte of
data to the register consists of the serial bus address, the
data register address written to the Address Pointer Regis-
ter, followed by the data byte written to the selected data
register. This is illustrated in Figure 6.
READING DATA FROM THE AD7415
Reading data from the AD7415 is a one or two byte op-
eration. Reading back the contents of the Configuration
Register is a single byte read operation as shown in Figure
7. The register address previously having been set up by a
single byte write operation to the Address Pointer Regis-
ter. Once the register address has been set up, any number
of reads can be subsequently done from that register with-
out having to write to the Address Pointer Register again.
If you want to read from another register then you will
have to write to the Address Pointer Register again to set
up the relevent register address.
Reading data from the Temperature Value Register is a
two byte operation as shown in Figure 8. The same rules
apply for a two byte read as a single byte read.
POWER-ON DEFAULTS
The AD7415 always powers up with the following de-
faults........
Address Pointer Register pointing to the Temperature
Value Register.
Configuration Register loaded with 40 Hex.
OPERATING MODES
Mode 1
This is the power-on default mode of the AD7415. In this
mode the AD7415 does a temperature conversion every
Figure 5. Writing to the Address Pointer Register to select
a register for a subsequent Read operation
Figure 6. Writing to the Address Pointer Register followed
by a single byte of data to the Configuration Register
R/
9
1
SCL
SDA
00
1
A 2
A 1
A 0
P7
P6
P 5
P4
P 3
P2
P1
P0
ACK. BY
AD7415
STOP BY
MA STE R
START BY
MA STE R
FRAM E 1
SERIA L BUS ADDRESS BYTE
FRAM E 2
ADDRESS POINTE R RE G ISTER BYTE
19
1
ACK. BY
AD7415
9
R/
9
1
SCL
SDA
00
1
A2
A1
A0
P7
P 6
P 5
P4
P3
P2
P1
P 0
ACK. BY
AD7415
START BY
MA STE R
FRAM E 1
SERIA L BUS ADDRESS BYTE
FRAM E 2
ADDRESS POINTE R RE G ISTER BYTE
19
1
ACK. BY
AD7415
9
D7
D6
D 5
D4
D3
D2
D1
D0
ACK. BY
AD7415
STOP BY
MA STE R
FRAM E 3
DA TA B YTE
19
SCL (CO NTINUED)
SDA (CO NTI NUED)
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