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參數(shù)資料
| 型號： | AD5744 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Complete, Quad, 14/16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC |
| 中文描述： | 完整，四路，14/16-Bit，高精度，串行輸入，雙極性電壓輸出DAC |
| 文件頁數(shù)： | 19/27頁 |
| 文件大?。?/td> | 243K |
| 代理商： | AD5744 |
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Preliminary Technical Data
Rev. PrA 15-Nov-04| Page 19 of 27
Table 8. AD5744/64 Input Register Format
MSB
DB23
R/W
LSB
DB0
DB22
0
DB21
REG2
DB20
REG1
DB19
REG0
DB18
A2
DB17
A1
DB16
A0
DB15
DB14
DB13
DB12
DB11
DB10
DB9
DB8
DATA
DB7
DB6
DB5
DB4
DB3
DB2
DB1
Table 9. Input Register Bit Functions
R/W
REG2, REG1, REG0
Indicates a read from or a write to the addressed register.
Used in association with the address bits to determine if a read or write operation is to the data register, offset
register, gain register, or function register.
REG2
REG1
REG0
Function
0
0
0
Function Register
0
1
0
Data Register
0
1
1
Coarse Gain Register
1
0
0
Fine Gain Register
1
0
1
Offset Register
These bits are used to decode the DAC channels
A2
A1
A0
Channel Address
0
0
0
DAC A
0
0
1
DAC B
0
1
0
DAC C
0
1
1
DAC D
1
0
0
ALL DACs
Data Bits
FUNCTION REGISTER
The Function Register is addressed by setting the three REG bits to 000. The values written to the address bits and the data bits determine
the function addressed. The Functions available through the function register are shown in Table 10 and
A2, A1, A0
D15 – D0
Table 11.
Table 10. Function Register Options
REG2
REG1
REG0
0
0
0
0
A2
0
0
A1
0
0
A0
0
1
DB15 .. DB6
DB5
DB4
NOP, Data = Don’t Care
D1
Direction
DB3
DB2
DB1
DB0
0
0
Don’t Care
Local-
Ground-
Offset Adjust
D1 Value
D0
Direction
D0
Value
SDO
Disable
0
0
0
0
0
0
1
1
0
0
0
1
CLR, Data = Don’t Care
LOAD, Data = Don’t Care
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