CDB5461AU Cirrus Logic Inc, CDB5461AU Datasheet - Page 5

• Manufacturer Part Number: CDB5461AU
• Description: Eval Bd Sngl Phase Power/Energy
• Manufacturer: Cirrus Logic Inc

Specifications of CDB5461AU

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: CS5461A
• Primary Attributes: 1-Phase, Energy-to-Frequency Output
• Secondary Attributes: GUI, USB, SPI, Microwire Interfaces
• Processor To Be Evaluated: CS5461A, C8051F320
• Interface Type: USB
• Operating Supply Voltage: 5 V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant
• Other names: 598-1552

1.2.1
The CDB5461AU evaluation board provides screw-type terminals (J23, J27) to connect input signals to the voltage
and current channels. The screw terminals are labels as VIN+, VIN1, IIN+, and IIN-. A simple R-C network at each
channel input provides a simple anti-alias filter.
The evaluation board provides three voltage reference options for VREFIN to the CS5461A. The three voltage ref-
erence options include: VREFOUT from CS5461A, the on-board +2.5V reference, and external REF+ (screw termi-
nal J14). Table 1 and Table 2 illustrate the options available for VREFIN. With a jumper on J25 in the position labeled
VREFOUT, the reference is supplied by the on-chip voltage reference. With a jumper on J25 in the position labeled
VREF, the reference is supplied by an off-chip voltage reference.
Table 2 illustrates the options available for VREF. With a jumper on J12 in position LT1019, the LT1019 provides a
+2.5V reference (the LT1019 was chosen for its low drift - typically 5ppm/°C). By setting the jumper on J12 to position
REF+, an external voltage reference is supplied via screw terminal J14's REF+ input.
The three input signal options for the voltage (VIN±) and current (IIN±) channel input include: an external signal
(screw terminals J23 and J27), GND or VREF. Table 3 illustrates the options available. By installing jumpers on J17
to position VIN+, J22 to position VIN-, J24 to position IIN+ and J26 to position IIN-, the input voltage signal is supplied
from the screw terminals J23 and J27. With a jumper on J17, J22, J24 and J26 in the GND position, the inputs are
connected to analog ground (AGND). With a jumper on J17, J22, J24 and J26 in position
nected to the reference voltage selected on J12.
DS661DB1
Analog Section
Table 2. External Voltage Reference Selection for VREF
Table 1. Internal Voltage Reference Selection for VREF
Reference
Reference
VREFOUT
LT1019
REF+
VREF
LT1019 Reference
Reference Source
Selects on-Board
Selects External
LT1019 Reference(J12)
Reference (25ppm/
Description
(5ppm/
Selects External or
Selects on-Chip
(J6)
Description
°
C)
°
LT1019
LT1019
REF+
REF+
C)
O
O
(Default)
J12
VREFOUT
VREFOUT
VREFIN
VREFIN
(Default)
O
O
O
O
J25
VREF
VREF
VREF
VREF
VREF
VREF
O
O
O
O
VREF
CDB5461AU
, the inputs are con-
5