參數(shù)資料
型號: LTC1658IS8
廠商: LINEAR TECHNOLOGY CORP
元件分類: DAC
英文描述: 14-Bit Rail-to-Rail Micropower DAC in MSOP
中文描述: SERIAL INPUT LOADING, 12 us SETTLING TIME, 14-BIT DAC, PDSO8
封裝: 0.150 INCH, PLASTIC, SOP-8
文件頁數(shù): 8/12頁
文件大?。?/td> 261K
代理商: LTC1658IS8
8
LTC1658
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
. If V
REF
= V
CC
and the DAC full-scale 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.
Offset and linearity are defined and tested over the region
of the DAC transfer function where no output limiting can
occur.
APPLICATIO
S I
FOR
ATIO
U
W
U
U
Figure 1. 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
1658 F01
INPUT CODE
(b)
OUTPUT
VOLTAGE
NEGATIVE
OFFSET
0V
8192
0
16383
INPUT CODE
(a)
OUTPUT
VOLTAGE
V
REF
= V
CC
V
REF
= V
CC
(c)
INPUT CODE
OUTPUT
VOLTAGE
POSITIVE
FSE
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