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參數資料
| 型號： | DEM-DAC90X |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Evaluation Fixture for the DAC900, DAC902, DAC904, DAC908(DAC900, DAC902, DAC904, DAC908的評估夾具) |
| 中文描述： | 評價夾具的DAC900，DAC902，DAC904，DAC908（DAC900，DAC902，DAC904，DAC908的評估夾具） |
| 文件頁數： | 4/11頁 |
| 文件大?。?/td> | 377K |
| 代理商： | DEM-DAC90X |
4
DEM-DAC90xU, E
In addition to the transformer coupled output configuration,
the evaluation board offers three more configurations which
use an operational amplifier:
1. Difference amplifier configuration.
2. Non-inverting single-ended configuration
3. Inverting single-ended configuration
Shown in Figures 3a. through 3c. are the corresponding
circuit schematics. They illustrate the necessary component
values and jumper configurations.
POWER-DOWN MODE
The DAC90x can be placed into a power-down mode by
raising the voltage on pin 15 to a logic HIGH. The power-
down pin of the DAC90x has an internal active pull-down
circuit to ensure the converter to be fully operational when
this pin is left unconnected. The evaluation board provides
a SMA connector (J2) to the power-down pin, which is
terminated with a 50
resistor (R2).
J6
V
OUT
R
3
49.9
R
4
49.9
R
15
49.9
J3
JP6A
JP7A
OPA680
R
13
402
J4
JP6B
R
11
20
JP8
“A”
“A”
“B”
“B”
JP9
R
12
402
DAC90x
I
OUT
22
I
OUT
21
J6
V
OUT
R
3
49.9
R
4
49.9
R
15
49.9
J3
JP6A
JP7A
OPA680
R
13
402
R
14
200
J4
JP6B
R
11
200
JP8
“B”
“A”
“B”
DAC90x
I
OUT
22
I
OUT
21
FIGURE 3. Output Configurations.
DAC90x
J6
NOTE: (1) Resistor Values Optimized for Symmetric 25
Loading.
V
OUT
R
3
(1)
28.7
R
4
(1)
26.1
R
14
402
R
15
49.9
R
11
200
J3
JP6A
JP7A
JP8
OPA680
R
13
402
“A”
“A”
R
10
0
J4
JP6B
I
OUT
22
I
OUT
21
JP7B
JP9
“A”
“A”
R
12
200
(a) Difference Amplifier Configuration.
(c) Inverting Amplifier Configuration.
(b) Non-Inverting Amplifier Configuration.
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相關代理商/技術參數 |
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