Rev. 3.00 R L VRT VRB VDD RED XRD9827 C I S M U X N/C The input is added to VRB before the signal passes through the ADC. If the CIS" />
參數(shù)資料
型號: XRD9827EVAL
廠商: Exar Corporation
文件頁數(shù): 5/36頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR XRD9827
標(biāo)準(zhǔn)包裝: 1
系列: *
XRD9827
13
Rev. 3.00
R
L
VRT
VRB
VDD
RED
XRD9827
C
I
S
M
U
X
N/C
The input is added to VRB before the signal passes
through the ADC. If the CIS output is zero, then the
output of the ADC will be zero code. This enables the
CIS to be referenced to the bottom ladder reference
voltage to use the full range of the ADC.
Some CIS sensors have an output with an offset voltage
of greater than 500mV. If the CIS output is beyond the
offset range of the XRD9827 (see Offset Control DAC,
Pg. 28) set the internal mode registers to external
reference. An external reference voltage equal to the
value of the CIS offset voltage can be applied to
VDCEXT (Figure 4) in order to meet the dynamic range
of the XRD9827. Figure 4 is a diagram of the XRD9827
in the external reference mode for CIS, DC coupled
applications.
Figure 3. Application with Offset in the Range (-100mv to 500mv)
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