Cirrus Logic CDB5484U - Manual (Page 8)

CDB5484U
8 DS919DB5
1.3.2 Current Sensor Connection
Current input options include an external signal (via screw terminals or XLR connectors) or GND. Table 2
illustrates the options available.
The CDB5484U evaluation board provides two input signal options for current channels (IIN1±, IIN2±):
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.
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 CDB5484U 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
CS5484
CDB5484U
250 mV
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-