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參數(shù)資料
| 型號： | MAX1478 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1% Accurate, Digitally Trimmed,Rail-to-Rail Sensor Signal Conditioner |
| 中文描述： | 1%精確度、數(shù)字校準、滿擺幅傳感器信號調(diào)理器 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 210K |
| 代理商： | MAX1478 |
In addition,
the EEPROM should only be written to at
T
A
= +25
°
C and V
DD
= 5V.
Writing to the internal EEPROM is a time-consuming
process and should only be required once. All calibra-
tion/compensation coefficients are determined by writ-
ing directly to the DAC and configuration registers. Use
the following procedure to write these calibration/com-
pensation coefficients to the EEPROM:
1)
Issue an ERASE EEPROM command.
2)
Wait 50ms (t
WRITE
).
3)
Issue an END EEPROM WRITE command at add-
ress 00h.
4)
Wait 1ms (t
WAIT
).
5)
Issue a BEGIN EEPROM WRITE command
(Figure 7) at the address of the bit to be set.
6)
Wait 50ms.
7)
Issue an END EEPROM WRITE command (Figure 7)
using the same address as in Step 5.
8)
9)
Wait 1ms.
Return to Step 5 until all necessary bits have been
set.
10) Read EEPROM to verify that the correct calibra-
tion/compensation coefficients have been stored.
READ EEPROM Command
The READ EEPROM command returns the bit stored at
the memory location addressed by the lower 7 bits of
the data field (A0–A6). The higher bits of the data field
(A7–A11) are ignored. Note that after a read command
has been issued, the DIO lines become an output and
the state of the addressed EEPROM location will be
available on DIO 200μs (t
READ
) after the falling edge of
the 16th SCLK cycle (Figure 8). After issuing the READ
EEPROM command, DIO returns to input mode on the
falling edge of CS. Reading the entire EEPROM
requires the READ EEPROM command be issued 128
times.
M
1% Accurate, Digitally Trimmed,
Rail-to-Rail Sensor Signal Conditioner
______________________________________________________________________________________
11
Figure 7. Begin WRITE EEPROM and End WRITE EEPROM Timing Diagrams
SCLK
SCLK
DIO
DATA
LSB
MSB
MSB
LSB
MSB
LSB
COMMAND
DATA
LSB
MSB
MSB
LSB
COMMAND
16-BIT COMMAND WORD – BEGIN EEPROM WRITE AT ADDRESS COMMAND
LSB
MSB
16-BIT COMMAND WORD – END EEPROM WRITE AT ADDRESS COMMAND
A0
A1
A2
A3
A4
A5
A6
0
0
0
0
0
0
0
0
1
DIO
A0
A1
A2
A3
A4
A5
A6
0
0
0
0
0
1
1
0
0
Figure 8. READ EEPROM Timing Diagram
SCLK
t
MIN
= 200
μ
s
CS
DIO
16 CLOCK CYCLES
INIT SEQUENCE
A0
X
1
0
1
0
U
0
A1
A2
A3
A4
A5
A6
0
0
0
0
0
0
0
X
X
EE DATA
DIO IS AN
OUTPUT PIN
1
1
t
READ
READ EEPROM AT ADDRESS COMMAND
DIO IS AN INPUT PIN
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PDF描述 |
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| MAX1478AAE | 1% Accurate, Digitally Trimmed,Rail-to-Rail Sensor Signal Conditioner |
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