ANALOG DEVICES EE-348 Service Manual
Engineer-to-Engineer Note EE-348
notes on using Analog Devices DSPs, processors and development tools
Technical
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Estimating Power for ADSP-214xx SHARC® Processors
Contributed by Ramdas Chary, Jeyant hi J e gadee san and Divy a Sunkara Rev 4 – February 22, 2011
Introduction
This EE-Note discusses power consumption of
ADSP-214xx SHARC® processors based on
characterization data measured over power
supply voltage, core frequency (CCLK), and
junction temperature (TJ). The intent of this
document is to assist board designers in
estimating their power budget for power supply
and thermal relief designs using ADSP-214xx
processors.
Furthermore, the associated .ZIP file contains
spreadsheets for ADSP-2146x, ADSP-2147x,
and ADSP-2148x processors, all aimed t o a ssist
in power estimation. The accompanying
spreadsheets allow users to enter their
application-specific operating conditions and
system-level utilization of resources, and use
these inputs to calculate the total power
consumed by the processor.
The AD SP -214xx fa mily o f proc e s s ors is membe r
of the SIMD (single instruction multiple data)
SHARC family of processors, featuring the
Analog Devices Super Harvard architecture and
an enhanced SIMD VISA (variable instruction
size architecture) core. Like other SHARC
processors, they are 32-bit floating-point
processors optimized for high-precision signal
processing applications. They also contain
dedicated hardware units for performing FIR
(finite impulse response), IIR (infinite impulse
response), and FFT (fast Fourier transform)
algo rithms wit hout any co re intervent ion, ther eby
providing an efficient saving of core MIPs.
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responsibi lity is assumed by Analog Devices regarding tec hnical accuracy and topical ity of the content provided in Analog Devices Engineer-to-Engineer Notes.
ADSP-2146x processors are offered in the
commercial temperature range at core clock
frequencies of up to 450 MHz, core operating
voltage of 1.1V (V
RAM) voltage of 1.8 V (V
voltage of 3.3 V ( V
), a DDR2 (dual data
DD_INT
DD_DDR2
). They are also offered
DD_EXT
), and at an I/O
in automotive and industrial temperature ranges
at co re clock frequencies of up to 400 MHz, core
operating voltage of 1.05 V (V
voltage of 1.8 V (V
3.3 V (V
). For specific information
DD_EXT
DD_DDR2
), and I/O voltage of
DD_INT
), DDR2
regarding operating temperature ranges and part
0
numbers, refer t o the pro cesso r da ta sheet
.
ADSP-2147x processors are offered in the
commercial, industrial and automotive
temperature r ange at co re clock frequencies of up
to 300 MHz, core operating voltage of
1.2V (V
(V
DD_EXT
), and at an I/O voltage of 3.3 V
DD_INT
). For specific information regarding
operating temperature ranges and part numbers,
0
refer to the processor da ta sheet
.
ADSP-2148x processors are offered in the
commercial, industrial and automotive
temperature r ange at co re clock frequencies of up
to 400 MHz, core operating voltage of
1.1V(V
(V
DD_EXT
), and at an I/O voltage of 3.3 V
DD_INT
). For specific information regarding
operating temperature ranges and part numbers,
0
refer to the processor da ta sheet
.
The total power consumption of the ADSP214xx processors can be viewed as the sum of the
power consumed for all of the power supply
do mains ( V
DD_INT
, V
DD_EXT
, and V
DD_DDR2
– DDR2
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