Cirrus Logic CDB5480U - Manual (Page 7)

CDB5480U
DS893DB5 7
1.3.2 Current Sensor Connection
Current input options include an external signal (via screw terminals or XLR connectors) or GND. Table 2
shows the options available.
There are two input signal options for current channels (IIN1±, IIN2±). The CDB5480U evaluation board
provides screw-type terminals (J1 and J2) or XLR connectors (J28 and J31) to connect input signals to
the current channels. The screw terminals are labeled as IIN1+ / IIN1-, and IIN2+ / IIN2-. An R-C network
at each channel input provides a simple configurable anti-alias filter (see Figure 3).
By installing jumpers on J8 to position IIN1+, J7 to position IIN1-, J14 to position IIN2+, and J13 to position
IIN2-, the input current signal is supplied from the screw terminals or XLR connectors.
Figure 4. Current Channel — Low-voltage Input
The CDB5480U evaluation board provides input shorting options for calibration and noise performance
measurements. With a jumper on J8, J7, J14, and J13 in the GND position, the inputs are connected to
analog ground (GND).
Table 2. Current Channel Input Signal Selection
INPUT Description J8 J7 J14 J13
IIN1± or IIN2±
Selects External
Low-voltage,
Fully Differential
Signal
IIN1± or IIN2±
Selects External
Low-voltage,
Single-ended
Signal
GND
Selects Grounding
the Input
 O IIN1+
O O IIN1+
IIN1+
GND
(Default)
 O IIN1-
O O IIN1-
GND
IIN1-
(Default)
 O IIN2+
O O IIN2+
IIN2+
GND
(Default)
 O IIN2-
O O IIN2-
GND
IIN2-
(Default)
 O IIN1+
O O IIN1+
IIN1+
GND
 O IIN1-
O O IIN1-
GND
IIN1-
 O IIN2+
O O IIN2+
IIN2+
GND
 O IIN2-
O O IIN2-
GND
IIN2-
 O IIN1+
O O IIN1+
IIN1+
GND
 O IIN1-
O O IIN1-
GND
IIN1-
 O IIN2+
O O IIN2+
IIN2+
GND
 O IIN2-
O O IIN2-
GND
IIN2-
IIN1-/IIN2-
IIN1+/IIN2+
GND
GND
CS5480
CDB5480U
250 mVp
J1/J12
J7/J13
J8/J14
C5/C11
0.033UF
C6/C12
0.033UF
R11/R22
NO POP
R1/R21
100
R2/R22
100
R9/R23
NO POP
R13/R24
NO POP
R49/R52 1K
R50/R53 1K
C34/C1
0.033UF
C35/C2
0.033UF
J44/J51
J46/J52
R51/
R54
0
J53/J56
J54/J55
IIN1+/IIN2+
IIN1-/IIN2-