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Power Architecture
Power Architecture
Digital Supply
®
The ADSP-CM419F EZ-KIT
has two primary voltage domains: 3.3V and 1.2V. The main input is a 5V wall
JP44
J4
adaptor. The 5V source can be selected via
to input from the PWM connector (
) as an alternative to the
J4
JP44
wall power adaptor. Refer to
and
for details. The Analog Devices ADM7172 LDO provides 3.3V for the
VDD_EXT signal and the 3.3V power requirements of the board. The VDD_INT signal is delivered through either
VR2
Q1
JP2
Analog Devices regulator ADP1715 Linear Regulator (
) or a PNP transistor (
). Jumper
is provided to
select between External and Internal regulator.
Analog Front End
The Analog Front End is powered via VDD_ANA0 and VDD_ANA1 power pins which fall in 3.3V domain. The
Fast Over Current Protection (FOCP) Comparators are powered via VDD_COMP. By default, analog supplies are
powered from the ADM7172 LDO which powers up the VDD_EXT and rest of the 3.3V domain. External sup-
P6, P7 & P8
P11
plies can power up the analog domain via
. A +/-5V supply (via
) is required for the Op Amps at
the input of the Analog Input Channels. A +/-15V supply is required for the DAC AD5791.
Power Measurements
Locations are provided for measuring the current draw from various power planes. Precision 0.051 ohm shunt resis-
3.3V
VDD_EXT
tors are available on the
and
voltage domains. For current draw, the jumper is removed, voltage
across the resistor can be measured using an oscilloscope, and the value of the resistor can be measured using a preci-
sion multi-meter. Once voltage and resistance are measured, the current can be calculated by dividing the voltage by
the resistance. For the highest accuracy, a differential probe should be used for measuring the voltage across the resis-
tor.
Example Programs
®
Example programs are provided with the ADSP-CM419F EZ-KIT
Board Support Package (BSP) to demonstrate
ADSP-CM419F_EZ-KIT\examples
various capabilities of the product. The programs can be found in the
installa-
tion folder. Refer to a readme file provided with each example for more information.
Reference Design Information
A reference design info package is available for download on the Analog Devices Web site. The package provides
information on the schematic design, layout, fabrication, and assembly of the board.
The information can be found at:
http://www.analog.com/ADSPCM419FEZKIT
.
®
2–7
ADSP-CM419F EZ-KIT
Manual
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