參數(shù)資料
型號: TLC7226INE4
廠商: TEXAS INSTRUMENTS INC
元件分類: DAC
英文描述: PARALLEL, 8 BITS INPUT LOADING, 7 us SETTLING TIME, 8-BIT DAC, PDIP20
封裝: 0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-20
文件頁數(shù): 21/21頁
文件大?。?/td> 440K
代理商: TLC7226INE4
TLC7226C, TLC7226I, TLC7226M
QUADRUPLE 8BIT DIGITALTOANALOG CONVERTERS
SLAS060F JANUARY 1995 REVISED APRIL 2009
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
interface logic information (continued)
17
16
15
A0
A1
WR
To Latch A
To Latch B
To Latch C
To Latch D
Figure 6. Input Control Logic
unipolar output operation
The unipolar output operation is the basic mode of operation for each channel of the TLC7226, with the output
voltages having the same positive polarity as Vref. The TLC7226 can be operated with a single power supply
(VSS = AGND) or with positive/negative power supplies. The voltage at Vref must never be negative with respect
to AGND to prevent parasitic transistor turnon. Connections for the unipolar output operation are shown in
Figure 7. Transfer values are shown in Table 3.
_
+
DAC A
_
+
DAC B
_
+
DAC C
_
+
DAC D
4
REF
2
1
20
19
OUTA
OUTB
OUTC
OUTD
Figure 7. 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 A. 1 LSB
+ V
ref
2–8
+ V
ref
1
256
Table 3. Unipolar Code
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