參數(shù)資料
型號(hào): TLC7226EDWR
廠商: TEXAS INSTRUMENTS INC
元件分類: DAC
英文描述: QUAD, PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDSO20
封裝: PLASTIC, SOIC-20
文件頁(yè)數(shù): 3/22頁(yè)
文件大?。?/td> 333K
代理商: TLC7226EDWR
TLC7226C, TLC7226E
QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS
SLAS060B – JANUARY 1995 – REVISED AUGUST 1996
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
unipolar output operation (continued)
_
+
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
linearity, offset, and gain error using single-ended power supplies
When an amplifier is operated from a single power supply, the voltage offset can still be either positive or
negative. With a positive offset, the output voltage changes on the first code change. With a negative offset the
output voltage may not change with the first code depending on the magnitude of the offset voltage.
The output amplifier, with a negative voltage offset, attempts to drive the output to a negative voltage. However,
because the most negative supply rail is ground, the output cannot be driven to a negative voltage.
So when the output offset voltage is negative, the output voltage remains at zero volts until the input code value
produces a sufficient output voltage to overcome the inherent negative offset voltage, resulting in a transfer
function shown in Figure 5.
相關(guān)PDF資料
PDF描述
TLC7226EDW QUAD, PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDSO20
TLC7226EN QUAD, PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDIP20
TLC7524EFN PARALLEL, 8 BITS INPUT LOADING, 0.1 us SETTLING TIME, 8-BIT DAC, PQCC20
TLC7524EN PARALLEL, 8 BITS INPUT LOADING, 0.1 us SETTLING TIME, 8-BIT DAC, PDIP16
TLC7524CFN PARALLEL, 8 BITS INPUT LOADING, 0.1 us SETTLING TIME, 8-BIT DAC, PQCC20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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