Difference between revisions of "Velleman PCSGU250"
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'''USB interface''' | '''USB interface''' | ||
* inluded in the PIC | * inluded in the PIC | ||
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*[http://www.b-kainka.de/Daten/OPV/tl081crev1.pdf TL081C] JFET OPAMP | *[http://www.b-kainka.de/Daten/OPV/tl081crev1.pdf TL081C] JFET OPAMP | ||
* [http://www.ti.com/product/lm6172 lm6172] Dual High Speed, Low Power, Low Distortion Voltage Feedback Amplifiers 100Mhz GBW | * [http://www.ti.com/product/lm6172 lm6172] Dual High Speed, Low Power, Low Distortion Voltage Feedback Amplifiers 100Mhz GBW | ||
== Photos == | == Photos == | ||
Revision as of 15:50, 30 July 2013
File:Velleman PCSU250.jpg
Velleman PCSU250
The [1] is an inexpensive USB-based oscilloscope. It has 2 channels, an analog bandwidth of 12MHz and 25MS/s sampling rate.
See Velleman PCSU250/Info for more details (such as lsusb -vvv output) about the device.
Hardware
Control logic
- Xilinx XC3S50 50K-gate FPGA
- 50MHz crystal: 50.000 Y0KE (clock source for the Xilinx FPGA)
- Microchip PIC18LF2450-I/SP 8-bit microcontroller
USB interface
- inluded in the PIC
Analog frontend
- 4 x SIR-S4-105A IZ Goodsky 5V relay (2 per input channel)
- 2 x Texas Instruments OPA2354 op-amps
- 1 x Analog Devices AD9288BST-40 Dual 8-bit 40MSPS A/D converters
Power
- 3 x Texas Instruments TPS766xx voltage regulators (IC19=1V, IC20=2.5V, IC21=3.3V)
Trigger Level
- 74HCT4051D 8-channel analog multiplexer/demultiplexer with 15 resistors, is that a R2R DAC??? I would guess this one is for the trigger level
Signal Generator
- DAC0800LCM 8-Bit Digital-to-Analog Converter Settling Time 0.1 µs, does that mean max. 10Mhz Sample rate?
- TL081C JFET OPAMP
- lm6172 Dual High Speed, Low Power, Low Distortion Voltage Feedback Amplifiers 100Mhz GBW
Photos
PCB, front
PCB, back
signal generator?
signal generator?
Protocol
TODO.
Resources
- The vendor software appears to have been written by Magnova Components.