DSPIC33FJ128GP706-I/PT Microchip Technology, DSPIC33FJ128GP706-I/PT Datasheet - Page 19

IC DSPIC MCU/DSP 128K 64TQFP

DSPIC33FJ128GP706-I/PT

Manufacturer Part Number
DSPIC33FJ128GP706-I/PT
Description
IC DSPIC MCU/DSP 128K 64TQFP
Manufacturer
Microchip Technology
Series
dsPIC™ 33Fr

Specifications of DSPIC33FJ128GP706-I/PT

Program Memory Type
FLASH
Program Memory Size
128KB (128K x 8)
Package / Case
64-TFQFP
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
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
Product
DSCs
Data Bus Width
16 bit
Processor Series
DSPIC33F
Core
dsPIC
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
85
Data Ram Size
16 KB
Operating Supply Voltage
3 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52713-733, 52714-737, 53276-922, EWDSPIC
Data Rom Size
4096 B
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, DM240001, DV164033
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
DM300024 - KIT DEMO DSPICDEM 1.1DV164033 - KIT START EXPLORER 16 MPLAB ICD2MA330012 - MODULE DSPIC33 100P TO 84QFPMA330011 - MODULE DSPIC33 100P TO 100QFPDM300019 - BOARD DEMO DSPICDEM 80L STARTERDM240001 - BOARD DEMO PIC24/DSPIC33/PIC32AC164327 - MODULE SKT FOR 64TQFPDV164005 - KIT ICD2 SIMPLE SUIT W/USB CABLE
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DSPIC33FJ128GP706-I/PT
Manufacturer:
MICROCHIP
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Microchip Technology
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DSPIC33FJ128GP706-I/PT
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© 2009 Microchip Technology Inc.
2.2.1
The high precision class 0.2S requirement for the energy meter makes it crucial to
select proper burden resistors for the output of the current transformers.
Metal film resistors with low inherent noise and temperature coefficient are ideal. Given
that the secondary current of the CT is I, then the input voltage of the MCP3909 device
is U = IR, where R is the resistance of R
If the temperature varies by ΔT, and the temperature coefficient of sampling resistor R
is β ppm/°C, then the output voltage is:
EQUATION 2-1:
The voltage variation is:
EQUATION 2-2:
This relationship shows that the output voltage variation caused by temperature
variation is in proportion to the temperature coefficient of the burden resistor.
In addition, a smaller temperature coefficient benefits meter start stabilization after
startup. It takes a longer time for resistors with larger temperature coefficient to
stabilize. Therefore, accurate measurements would require a longer wait after
power-up. This affects the efficiency, or speed of meter calibration.
Burden Resistor Temperature Coefficient
ΔU
=
U' U
U'
=
=
I
×
I R
(
ΔT β
125
+
×
Δ
and R
Hardware Description
T
×
×
R
β
126
×
=
R
U
)
(Using Phase A as an example).
×
ΔT
×
β
DS51723A-page 19

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