參數(shù)資料
型號: LTC1657LIN
廠商: LINEAR TECHNOLOGY CORP
元件分類: DAC
英文描述: Parallel 16-Bit Rail-to-Rail Micropower DAC
中文描述: PARALLEL, WORD INPUT LOADING, 20 us SETTLING TIME, 16-BIT DAC, PDIP28
封裝: 0.300 INCH, PLASTIC, DIP-28
文件頁數(shù): 8/12頁
文件大小: 157K
代理商: LTC1657LIN
8
LTC1657L
APPLICATIO
S I
FOR
ATIO
U
Rail-to-Rail Output Considerations
In any rail-to-rail DAC, the output swing is limited to
voltages within the supply range.
If the DAC offset is negative, the output for the lowest
codes limits at 0V as shown in Figure 1b.
Similarly, limiting can occur near full scale when the REF
pin is tied to V
CC
/2. If V
REF
= V
CC
/2 and the DAC full-scale
W
U
U
error (FSE) is positive, the output for the highest codes
limits at V
CC
as shown in Figure 1c. No full-scale limiting
can occur if V
REF
is less than (V
CC
– FSE)/2.
Offset and linearity are defined and tested over the region
of the DAC transfer function where no output limiting can
occur.
Figure 2. Effects of Rail-to-Rail Operation On a DAC Transfer Curve. (a) Overall Transfer Function (b) Effect of Negative
Offset for Codes Near Zero Scale (c) Effect of Positive Full-Scale Error for Input Codes Near Full Scale When V
REF
= V
CC
/2
1657 F02
INPUT CODE
(b)
OUTPUT
VOLTAGE
NEGATIVE
OFFSET
0V
32768
0
65535
INPUT CODE
(a)
OUTPUT
VOLTAGE
V
REF
= V
CC
/2
V
CC
V
CC
V
REF
= V
CC
/2
(c)
INPUT CODE
OUTPUT
VOLTAGE
POSITIVE
FSE
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