Hantek DSO-2250
The Hantek DSO-2250 is an inexpensive USB-based oscilloscope. It has 2 channels, an analog bandwidth of 100MHz and 250MS/s sampling rate.
See Hantek DSO-2250/Info for more details (such as lsusb -vvv output) about the device.
For more information about the devices in Hantek's USB oscilloscope series, see Hantek DSO-2xxx/52xx.
Hardware
- Xilinx SPARTAN XC3S50AN
- 100 MHz oscillator
- Cypress CY7C68013A (FX2)
- 2 x ISSI IS61LV5128AL (512K SRAM)
- Microchip 24LC0281 (FX2 EEPROM)
- 54286 9CTG4 (near the 1Khz 2VPP signal gen)
- HC244SJ - octal buffer / line driver?
Input stage:
Per channel:
- MAX4547 Bidirection RF Video Switch
- Unknown (relay switch? U33)
- Unknown (second stage/signal clamping? U9)
- 3 x Forward Relay PL-5 (relays)
Photos
Hantek DSO-2250
Probe Inputs
USB Connect and 1Khz calibration
Xilinx SPARTAN XC3S50AN CPLD
512Kx2 SRAM
DSO-2250 PCB top view
DSO-2250 PCB bottom view
Xilinx main oscillator
External trigger channel
Octal buffer/line driver?
unknown connect(P3) and unknown stage(U4 and U10)
Input channel MAX4547(U7) ?(U9) ?(U33)
Input channels front
FX2 and EEPROM
1khz 2VPP signal generation circuitry and Cypress main EEPROM (U807)
Protocol
See Hantek_DSO-2xxx/52xx#Protocol.
Extracting the firmware
See Hantek_DSO-2xxx/52xx#Extracting_the_firmware.