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
- Main chip:Xilinx SPARTAN XC3S50AN
- Main Oscillator: 100MHz 100.000 YX NH
- USB: Cypress CY7C68013A-100AXC (FX2)
- 512K x 8 High-speed CMOS static RAM: 2x ISSI IS61LV5128AL-10TLI (datasheet)
- I2C EEPROM: Microchip 24LC02BI (for the USB VID/PID of the Cypress FX2)
- Main Power Supply? (near the 1Khz 2VPP signal gen): TPS54286
- HC244SJ - octal buffer / line driver? (U23)
Input stage (per channel):
- Quad/Dual, Low-Voltage, Bidirectional RF Video Switch: Maxim MAX4547 (datasheet)
- 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.