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參數資料
| 型號： | TLC7225IDWRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDSO24 |
| 封裝： | 0.300 INCH, GREEN, SOIC-24 |
| 文件頁數： | 4/22頁 |
| 文件大小： | 331K |
| 代理商： | TLC7225IDWRG4 |
TLC7225C, TLC7225I
QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS
SLAS109B – OCTOBER 1996 – REVISED FEBRUARY 2001
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
unipolar output operation
The unipolar output operation is the basic mode of operation for each channel of the TLC7225, with the output
voltages having the same positive polarity as Vref. The TLC7225 can be operated with a single supply
(VSS = AGND) or with positive or negative supplies. The voltage at Vref must never be negative with respect
to DGND to prevent parasitic transistor turnon. Connections for the unipolar output operation are shown in
Figure 8. The transfer values are shown in Table 3.
_
+
DAC A
_
+
DAC B
_
+
DAC C
_
+
DAC D
5
REFA
2
1
24
23
OUTA
OUTB
OUTC
OUTD
REFB
REFC
REFD
VSS
AGND
DGND
4
21
20
Figure 8. Unipolar Output Circuit
LSB
MSB
DAC LATCH CONTENTS
ANALOG OUTPUT
) V
ref
255
256
1111
) V
ref
129
256
1000
0001
1000
0000
) V
ref
128
256
+)
V
ref
2
0111
1111
) V
ref
127
256
0000
0001
) V
ref
1
256
0000
0 V
NOTE 3 : 1 LSB
+ V
ref
2– 8
+ V
ref
1
256
Table 3. Unipolar Code
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