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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)： | 3/15頁 |
| 文件大?。?/td> | 203K |
| 代理商： | ES52110 |
ITRI
ERSO
ES52110
8-bit D/A Converter
19999/12/27 01:37 PM
3
FUNCTION DESCRIPTION :
Function Mode
The selected DAC latch retains the data which is present on DB0-DB7 just
prior to CS or WR assuming a high state.Both analog outputs remain at the
values corresponding to the data in their respective latches.
MODE SELECT TABLE
DAC A/D ACB
L
H
X
X
L=Low State H=High State X=Don't Care
CS
L
L
H
X
WR
L
L
X
H
DACA
WRITE
HOLD
HOLD
HOLD
DACB
HOLD
WRITE
HOLD
HOLD
Circuit Description
＊
D/A Converter
The ES 52110 contains two identical 8-bit multiplying D/A converters,
DAC A and DAC B. Each DAC consists of a highly stable R-2R ladder and
eight N-channel current steering switches. Asimplified D/A circuit for DAC
A is shown in Figure 1. An inverted R-2R ladder structure is used, that is,
binary weighted currents are switched between the DAC ouptut and AGND
thus maintaining fixed currents in each ladder leg independent of switch
state. There is normally closed switch in series with the internal feedback
resistor (R
FB
). This switch improves linearity performance over temperature
and power supply rejection; however , when the circuit is not powered up,
the switch assumes and open state.
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