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參數(shù)資料
| 型號： | ES52110 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8-bit D/A Converter |
| 中文描述： | 8位D / A轉(zhuǎn)換器 |
| 文件頁數(shù)： | 6/15頁 |
| 文件大?。?/td> | 203K |
| 代理商： | ES52110 |
ITRI
ERSO
ES52110
8-bit D/A Converter
19999/12/27 01:37 PM
6
Application Information
The most common application of this DAC is voltage output operation. Unipolar
output operation provides a 0 to 10 volt output swing when connected, as shown in
Figure 4. The maximum output voltage polarity is the inverse of the input reference
voltage, since the op amp inverts the input currents. The transfer equation for unipolar
operation is V
OUT
=-V
IN
D/256, where Dis the decimal value of the data bit inputs DB0
THRU DB7 and V
IN
is the reference input voltage. The transfer equation highlights
another popular applicaton of CMOS DAC's , The output voltage is the product of the
reference voltage and the digital input code. The reference input voltage can be any value
in the range of ±V
CC
volts for both DC or AC signals. The circuit in Figure 4 performs
tow-quadrant multiplication. Table 1 provides example analog outputs for the given
digital input codes.
For biploar output operation connect the ES 52110 as shown in Figure 5. This circuit
configuration provides an offset current, derived from the reference to enable the output
op amp to swing in both polarities. The digital input coding becomes offset binary . Table
2 provides some example analog outputs for various digital nputs (D). The transfer
equation for bipolar operation is V
OUT
= V
IN
×(D/128-1),where Dis the decimal value of
the data bit inputs DB0 thru DB7. This circuit provides full four-quadrant multiplication
able to accept both polarities on all input as well as the circuit output.
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