Cirrus Logic CDB5466U - Manual (Page 6)

CDB5466U
6 DS676DB1
1.2.2.2 High-pass Filter
By removing the offset from either channel, no error component will be generated at DC when computing the active
(real) power. Input pin HPF defines the three options, and J33 defines the state of the HPF pin.
– HPF is enabled in the voltage channel when jumper J33 = GND.
– HPF is enabled in the current channel when pin HPF is connected to pin FOUT.
– High-Pass Filter (HPF) is disabled when jumper J33 = VD+.
1.2.2.3 Energy Pulse Outputs
The CS5466 provides three output pins for energy registration. The E1 and E2 pins provide a simple interface from
which energy can be registered. These pins are designed to directly connect to a stepper motor or electromechanical
counter. The E1 and E2 outputs are available on header J11, pins 1 and 3, respectively. The pulse rate on the E1
and E2 pins are in the range of 0 to 4 Hz and all frequency settings are optimized to be used with standard meter
constants. The FOUT pin is designated for system calibration, the pulse rate can be selected to reach a frequency
of 8000 Hz. The FOUT output is available on header J11, pin 5.
Maximum Input Range IGAIN1 IGAIN0
J31 J32
±250mV 10x
±50mV 50x
±25mV 100x
±16.67mV 150x
Table 4. Current Channel PGA Selection
HPF
High Pass Filter Option J33
Voltage
Channel
HPF Option
is in Voltage
Channel
Current
Channel
HPF Option
is in Current
Channel
Disabled
HPF Option
is Disabled
Table 5. HPF Option Selection
O
O
VD+
IGAIN1
GND
(Default)
O
O
VD+
IGAIN0
GND
(Default)
O
O
VD+
IGAIN1
GND
O
O
VD+
IGAIN0
GND
O
O
VD+
IGAIN1
GND
O
O
VD+
IGAIN0
GND
O
O
VD+
IGAIN1
GND
O
O
VD+
IGAIN0
GND
O O VD+
O O FOUT
O GND
HPF
HPF
HPF
(Default)
O O VD+
O O FOUT
O GND
HPF
HPF
HPF
O O VD+
O O FOUT
O GND
HPF
HPF
HPF