參數(shù)資料
型號: LTC1659
廠商: Linear Technology Corporation
英文描述: 12-Bit Rail-to-Rail Micropower DAC in MSOP Package(12位,微功耗滿幅度電壓輸出數(shù)模轉(zhuǎn)換器(8腳MSOP封裝))
中文描述: 12位軌至軌微DAC,采用MSOP封裝(12位,微功耗滿幅度電壓輸出數(shù)模轉(zhuǎn)換器(八腳型MSOP封裝))
文件頁數(shù): 9/12頁
文件大小: 102K
代理商: LTC1659
9
LTC1659
APPLICATIO
S I
FOR
ATIO
U
W
U
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 1(b).
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 is Figure 1(c). 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.
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
1659 F01
INPUT CODE
(b)
OUTPUT
VOLTAGE
NEGATIVE
OFFSET
0V
2048
0
4095
INPUT CODE
(a)
OUTPUT
VOLTAGE
V
REF
= V
CC
V
REF
= V
CC
(c)
INPUT CODE
OUTPUT
VOLTAGE
POSITIVE
FSE
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