dsPIC33 DSP ADC Evaluation
dsPIC33 Demo Schematic pg 1
Tn1View - dsPIC33 Demo Schematic Tn2View - dsPIC33 Demo Schematic Tn3View - dsPIC33 Demo Layout
Name: dsPIC33 Sampler Board
CPU: dsPIC33EPxxxMC202
Status: In Work.
Summary: The dsPIC33 Sampler board is used to evaluate the 1MHz+ ADC and 70 MHz DSP processing power of this device. Dual channel inputs, a mic + mic-preamp, a 2Mb serial flash chip, and other peripherals are also added for flexibility.

Specifications 70 MHz DSP, 1MHz+ or 500kHz dual channel ADC, 2Mb storage, audio preamp, audio out amp, 5v and 3.3v I2C, 3.3v serial FTDI/USB and Bluetooth.
Dimensions: 3.8" x 2.5"
Power: 7 - 12 VDC
Software In work
Schematics dsPIC33 Sampler schematic pg 1
dsPIC33 Sampler schematic pg 2


The dsPIC33 Sampler board is designed to provide one channel of 12 bit data at 1100 kHz or four simultaneous channels of 10 bit data at 250 kHz.
It includes an electret microphone preamp and two opamp buffers. Both provide signals biased at 1.615v for the 0 to 3.3v ADC giving a bipolar +/- 1.615v data product.
A 2Mb 40MHz serial flash is available to store data.
Both a 5v and a 3.3v I2C interface are provided.
A 6 pin serial port configured to support 3.3v FTDI/USB and Bluetooth modules is provided.
The board has a 0.7w @ 8ohm audio driver connected to a high speed PWM port though a 10kHz low pass RC filter and volume control pot.
As with most boards, it also includes a PIC ISP programming header, +5 and +3.3v voltage regulators, and a status LED.
There are various jumper to isolate external voltages from the on-board regulators.


The board uses a 7-12v DC (9v DC typical) external supply for power.