3 analog section, 1 voltage sensor connection, Figure 2. voltage channel — low-voltage input – Cirrus Logic CDB5484U User Manual
Page 6: Cdb5484u
CDB5484U
6
DS919DB5
1.3
Analog Section
The analog section of the CDB5484U is highly configurable. Onboard signal conditioning options for the
voltage and current channels enable most applications to interface directly to the sensors. The following
two sections define the voltage and current channel configurations.
1.3.1
Voltage Sensor Connection
There are three input signal options for the voltage channel inputs (VIN1±, VIN2±) which include an ex-
ternal low-voltage signal (via screw terminals or XLR connections), high-voltage line inputs, or GND.
Table 1 illustrates the options available.
The CDB5484U evaluation board provides screw-type terminals (J3 and J2) or XLR connectors (J30 and
J29) to connect low-voltage input signals to the voltage channels (see Figure 2). The screw terminals are
labeled as VIN1+ / VIN1- and VIN2+ / VIN2-. An R-C network at each channel input provides a simple
configurable anti-alias filter. By installing jumpers on J6 to position VIN1+, J11 to position VIN1-, J10 to
position VIN2+, and J9 to position VIN2-, the input voltage signal is supplied from the screw terminals or
XLR connections.
Figure 2. Voltage Channel — Low-voltage Input
Table 1. Voltage Channel Input Signal Selection
INPUT
Description
J11
J6
J9
J10
VIN1± or VIN2±
Selects External
Low-voltage Fully
Differential Signal
VIN1± or VIN2±
Selects External
Low-voltage Sin-
gle-ended Signal
GND
Selects Grounding
the Input
High Voltage
Line1 or Line2
Selects External
High-voltage AC
Line Signal
O
VIN1-
O O
VIN1-
GND
VIN1-
(Default)
O
VIN1+
O O
VIN1+
O O
VIN1+
GND
Line1
VIN1+
(Default)
O
VIN2-
O O
VIN2-
VIN2-
GND
(Default)
O
VIN2+
O O
VIN2+
O O
VIN2+
VIN2+
Line2
GND
(Default)
O
VIN1-
O O
VIN1-
GND
VIN1-
O
VIN1+
O O
VIN1+
O O
VIN1+
GND
Line1
VIN1+
O
VIN2-
O O
VIN2-
VIN2-
GND
O
VIN2+
O O
VIN2+
O O
VIN2+
VIN2+
Line2
GND
O
VIN1-
O O
VIN1-
GND
VIN1-
O
VIN1+
O O
VIN1+
O O
VIN1+
GND
Line1
VIN1+
O
VIN2-
O O
VIN2-
VIN2-
GND
O
VIN2+
O O
VIN2+
O O
VIN2+
VIN2+
Line2
GND
O
VIN1-
O O
VIN1-
GND
VIN1-
O
VIN1+
O O
VIN1+
O O
VIN1+
GND
Line1
VIN1+
O
VIN2-
O O
VIN2-
VIN2-
GND
O
VIN2+
O O
VIN2+
O O
VIN2+
VIN2+
Line2
GND
VIN1+/VIN2+
VIN1-/VIN2-
250 mVp
CDB5484U
CS5484
J3/J2
J6/J10
J11/J9
C4/C8
0.027UF
C9/C7
0.027UF
R6/
R4
1K
R7/
R3
1K
J45/J47
VIN1+/VIN2+
VIN1-/VIN2-