Hantek DSO-220
The Voltcraft DSO-220 is a USB-based, 2-channel oscilloscope with an analog bandwidth of 20MHz and 60MS/s sampling rate.
This is a rebadged Hantek DSO-220.
See Voltcraft DSO-220/Info for more details (such as lsusb -vvv output) about the device.
Hardware
The PCB does not look professionally assembled; both my unit and the unit in the mikrocontroller.net teardown linked below appear to have most components, including SMD ones, hand-soldered. There are clear reworks present, with SMD resistors bridging between through-hole pads on the underside of the board.
- Main chip: Xilinx XC95144XL CPLD (JTAG IDCODE 0x59608093) (datasheet)
- USB: Cypress EZ-USB AN2131QC (datasheet)
- I2C EEPROM: Unknown (marking masked on all photos I've seen)
- SRAM (64KB): 2x ISSI IS62LV256L-15T 32K x 8 Low Voltage CMOS Static RAM (datasheet)
- ADC: Texas Instruments ADC1175-50 8-Bit, 50 MSPS, 125mW A/D Converter (datasheet)
- Per-channel mux: 74HC4052 Dual 4-channel analog multiplexer/demultiplexer (datasheet)
- Crystal: 60MHz
There is an unpopulated JTAG header for the CPLD labeled J8. Its pinout is as follows:
- +3.3V (pin 1 has a square pad)
- TCK
- TDI
- TDO
- TMS
- GND
Photos
Top w/ USB + CAL
Bottom
Top w/ probe connectors
Top case removed
PCB, top
PCB, chip markings
PCB, markings
PCB, bottom
PCB, example of reworks
Inner case
Protocol
TODO.
Resources
- Hantek history (DSO-220 seems to have been their first scope)
- hantek.org: two different DSO-220 versions seem to exist
- Teardown from mikrocontroller.net