DSPIC33FJ128GP706A-I/MR Microchip Technology, DSPIC33FJ128GP706A-I/MR Datasheet - Page 76

IC DSPIC MCU/DSP 128K 64-QFN

DSPIC33FJ128GP706A-I/MR

Manufacturer Part Number
DSPIC33FJ128GP706A-I/MR
Description
IC DSPIC MCU/DSP 128K 64-QFN
Manufacturer
Microchip Technology
Series
dsPIC™ 33Fr

Specifications of DSPIC33FJ128GP706A-I/MR

Core Processor
dsPIC
Core Size
16-Bit
Speed
40 MIPs
Connectivity
CAN, I²C, IrDA, LIN, SPI, UART/USART
Peripherals
AC'97, Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 18x10b/12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-VFQFN, Exposed Pad
Product
DSCs
Processor Series
DSPIC33F
Core
dsPIC
3rd Party Development Tools
52713-733, 52714-737, 53276-922, EWDSPIC
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, DM240001, DV164033
Core Frequency
40MHz
Core Supply Voltage
3.3V
Embedded Interface Type
I2C, SPI, UART
No. Of I/o's
53
Flash Memory Size
128KB
Supply Voltage Range
3V To 3.6V
Rohs Compliant
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
MCP3909 / dsPIC33F 3-Phase Energy Meter Reference Design
DS51723A-page 76
FIGURE C-1:
C.2.1
Assuming that the average of a periodic signal in one cycle is g(t),
EQUATION C-1:
Make t = x/
EQUATION C-2:
where f(x) = g(x/
If the entire period sampling cannot be realized while a sampling frequency deviation
Δ exists, then:
EQUATION C-3:
We have:
EQUATION C-4:
The value of F
non--synchronous sampling error E = f(x)- F
As F
within the range of 0-2
1
(α) is function with 2
Basic Idea of Quasi-Synchronous Sampling
ω
, then,
1
(α) is a function of
ω
), and the period is 2π.
f x ( )
Quasi Synchronous Sampline.
π
, and it can be deduced that f(x) = F
---------------- -
2
π
π
g t ( )
1
V
+
as its period, its value may be averaged through integration
F
Δ
1
( )
=
g t ( )
α
(
2
π
-- -
T
1
0
=
+
α
Ts
=
T
0
Δ
---------------- -
2
T≠N*Ts
g
and also a function with 2π as its perod. The
)
----- -
2
π
t ( )dt
f x ( ) x
1
π
1
+
d
Δ
2
0
π
=
f x ( ) x d
(
1
α
---------------- -
2
(α).
1
-- -
T
π
+
1
+
2
α
(
π
TO
Δ
=
+
TO
Δ
+
(
f x ( )
α
)
T
f x ( ) x d
)
+
g
2
t ( )dt
α
π
+
© 2009 Microchip Technology Inc.
Δ
t
1
)
(α).
f x ( ) x
d

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