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CDB5466U Schematic ( PDF Datasheet ) - Cirrus Logic

Teilenummer CDB5466U
Beschreibung Evaluation Board
Hersteller Cirrus Logic
Logo Cirrus Logic Logo 




Gesamt 21 Seiten
CDB5466U Datasheet, Funktion
www.DataSheet4U.com
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CDB5466U
CDB5466U Evaluation Board
Features
Active Energy-to-Pulse Conversions
Simple Configuration Jumpers
– Current Channel Gain
– High-pass Filter
– Energy-to-pulse Output Frequency
Energy Pulses
– Collected by On-board Microcontroller
– Available on External Header
– Viewable via LEDs
Multiple Supply Voltage Selections
USB Communication with PC
On-board Voltage Reference
General Description
The CS5466 is a low cost power/energy IC with pulse
output for power measurement solutions. The
CDB5466U Evaluation Board is an inexpensive tool
designed to evaluate the functionality and perfor-
mance of the CS5466.
The evaluation board is designed to output energy-to-
pulse conversions upon power-up. The CS5466 data
sheet should be read and consulted when using the
CDB5466U evaluation board.
The evaluation board includes a microcontroller with a
USB interface. The microcontroller and GUI (Graphi-
cal User Interface) provide a means to quickly register
and evaluate the CS5466’s energy-to-pulse outputs.
ORDERING INFORMATION
CDB5466U
Evaluation Board
+5V
GND
4.096MHz
VD+ EXT
Vu+ EXT
VIN+
VIN-
XIN XOUT
VIN+
VIN-
CS5466
E1
E2
FOUT
NEG
E1 E2 FOUT NEG
C8051F320
Microcontroller
IIN+ IIN+
IIN- IIN-
REF+
VREF SOURCE
+2.5 V
Reference
HPF
IGAIN0
IGAIN1
FREQ0
FREQ1
FREQ2
CONFIGURATION JUMPERS
USB
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved)
MAY ‘05
DS676DB1
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CDB5466U Datasheet, Funktion
CDB5466U
Maximum Input Range
IGAIN1
J31
IGAIN0
J32
±250mV
10x
VD+
IGAIN1 O
GND O
(Default)
VD+
IGAIN0 O
GND O
(Default)
±50mV
50x
VD+
IGAIN1 O
GND O
VD+
IGAIN0 O
GND O
±25mV
100x
VD+
IGAIN1 O
GND O
VD+
IGAIN0 O
GND O
±16.67mV
150x
VD+
IGAIN1 O
GND O
VD+
IGAIN0 O
GND O
Table 4. Current Channel PGA Selection
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+.
High Pass Filter Option
HPF
J33
Voltage
Channel
HPF Option
is in Voltage
Channel
HPF O
HPF O
HPFO
O VD+
O FOUT
GND
(Default)
Current
Channel
HPF Option
is in Current
Channel
HPF O
HPF O
HPFO
O VD+
O FOUT
GND
Disabled
HPF Option
is Disabled
HPF O
HPF O
HPFO
O VD+
O FOUT
GND
Table 5. HPF Option Selection
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.
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CDB5466U pdf, datenblatt
CDB5466U
In the CS5466 Pulse Rate Output Window, the Pulse Count, Frequency, Average Freq and Standard Deviation are
displayed for the three energy-to-pulse outputs.
Count Span: The Count Span entry allows for a time period to be specified for counting the energy pulses output
by the CS5466. The Count Span is a decimal number having a range of 0.18 < Count Span < 167,772, with units of
seconds.
Periods to Average: The Periods to Average entry allows an average to be performed on the pulses counted during
the specified Count Span. The Periods to Average is an integer with a range of 1 < Periods to Average < 10,000.
Reset DUT: When this button is selected, the evaluation software will request the microcontroller to hardware reset
the CS5466. The CS5466 will perform a reset as discussed in the CS5466 data sheet.
Start/Stop: Initially the Stop button is hidden. When the Start button is selected, the evaluation software will instruct
the microcontroller to start counting the energy-to-pulse outputs from the CS5466. At this time the Start button is
disabled and the Stop button will appear. The evaluation software will then collect the Pulse Count over a duration
of time specified (in seconds) by the Count Span. The counted pulses will then be averaged over the specified Pe-
riods to Average entry. The Pulse Count and calculated Frequency, Average Freq and Standard Deviation will be
displayed at the end of the cycle.
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