參數(shù)資料
型號(hào): LTC1699EMS8-82
英文描述: Analog IC
中文描述: 模擬IC
文件頁(yè)數(shù): 2/16頁(yè)
文件大?。?/td> 175K
代理商: LTC1699EMS8-82
10
LTC1655/LTC1655L
APPLICATIONS INFORMATION
WU
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 VCC/2. If VREF = VCC/2 and the DAC full-scale
error (FSE) is positive, the output for the highest codes
limits at VCC as shown in Figure 1c. No full-scale limiting
can occur if VREF is less than (VCC – FSE)/2.
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 VREF = VCC/2
1655/55L F01
INPUT CODE
OUTPUT
VOLTAGE
NEGATIVE
OFFSET
0V
32768
0
65535
INPUT CODE
OUTPUT
VOLTAGE
VREF = VCC/2
VCC
VREF = VCC /2
INPUT CODE
OUTPUT
VOLTAGE
POSITIVE
FSE
(1b)
(1a)
(1c)
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