DSPIC33FJ128GP706A-I/MR Microchip Technology, DSPIC33FJ128GP706A-I/MR Datasheet - Page 20

• 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
2.3
FIGURE 2-3:
DS51723A-page 20
SDO DR
ANALOG-TO-DIGITAL CONVERSION
Phase A,B,C I & V Data
3.3768 MHz (50 Hz Version)
This meter design uses Microchip's MCP3909 energy meter ICs. Small-signal current
inputs can be amplified by the programmable gain amplifier inside the MCP3909
device. The programmable range for the MCP3909's PGA is 16:1 V/V. The MCP3909
PGA gain can be configured by G0 and G1 (Pin 15 and 16 of the dsPIC33F).
The MCP3909 device's clock is provided by a 3.3768 MHz active crystal (for 50 Hz
system, see Appendix D. “50/60 Hz Meter Operation” for 60 Hz line frequency
information). The MCP3909 device's output data rate is 12.8 ksps. The clock lines and
MCLR lines of all 3 MCP3909 devices are connected together, which ensures that the
3 phases are strictly synchronous.
Clock Generation, Sampling Times and Calculation Frequencies.
x 6 ADCs
16 bits
t
MCP3909
LINE_CYC
f
f
f
SAMPLE3
SAMPLE1
SAMPLE2
t
SAMPLE
= 3.2 ksps (Harmonic Analysis, Distortion)
= 12.8 ksps (Active Power)
= 6.4 ksps (Reactive Power, RMS Current / Voltage)
X100
MCP3909
MCLK input
DR
MCP3909
DR Pulse
© 2009 Microchip Technology Inc.
(Input Capture)
To dsPIC33F
IRQ IC1