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CS5501-SD датащи(PDF) 51 Page - Cirrus Logic

номер детали CS5501-SD
подробное описание детали  Low-Cost, 16 & 20-Bit Measurement A/D Converter
PDF  54 Pages
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производитель  CIRRUS [Cirrus Logic]
домашняя страница  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS5501-SD датащи(HTML) 51 Page - Cirrus Logic

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Analog Input: Overrange Precautions
In normal operation the value of the reference
voltage determines the range of the analog input
signal. Under abnormal conditions the analog sig-
nal can extend to be equal to the VA+ and VA-
supply voltages. In the event the signal exceeds
these supply voltages the input current should be
limited to
± 10 mA as the analog input of the chip
is internally diode clamped to both supplies. Ex-
cess current into the pin can damage the device.
On the evaluation board, resistor R16 (see Figure
6) does provide some current limiting in the event
of an overrange signal which exceeds the supply
voltage.
CS5501/
U4
VA+
VD+
VREF
AGND
AIN
GND
VIN
2
4
5
6
TP14
TP11
TP13
+5V
-5V
GND
V+
R4
TP15
VA-
VD-
TP12
V-
R5
C9
C8
TP16
AIN
CW
DGND
14
15
5
10
8
9
7
6
R6
10
C7
0.1
µF
C6
0.1
µF
R10
2.4
C16
0.1
µF
C19
10
µF
0.1
µF0.1 µF
R7
10
R16
200
C21
0.0047
µF
X7R
U5
LT1019-2.5
R8
1 M
R9
50 k
C18
10
µF
C10
0.1
µF
C20
10
µF
10
10
C17
10
µF
D1
6.8
D2
6.8
VOUT
TRIM
CS5503
Figure 6. Voltage Reference / Analog Input
CDB5501/CDB5503
DS31DB3
51



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