SainSmart DDS120

SainSmart DDS120

The SainSmart DDS120 is a USB-based, 2-channel oscilloscope with an analog bandwidth of 20MS/s and 48MS/s sampling rate.

See SainSmart DDS120/Info for more details (such as lsusb -v output) about the device.

• USB: Cypress CY7C68013A-100AXC (FX2LP) (datasheet)
• 256-byte I²C EEPROM: Microchip 24LC641 (datasheet)
• Crystal: 24MHz
• AD: AD8065ART-R2: (datasheet)

or in newer hardware

• AD: MXT2088 (datasheet)
• Opamp: Analog devices AD8065 (OPAMP)
• MUX: Texas Instruments CD4052B (2 x 1:4 MUX)

Photos

• 

  Device, top

Resources

• EEVBlog forum thread
• Detailed description of the hardware

Oscilloscope command	bRequest value	Notes
Set CH0 coupling	0x24	Possible values: 0x00, 0x08 (AC-coupling, DC-coupling).
Set CH1 coupling	0x25	Possible values: 0x20, 0x10 (AC-coupling, DC-coupling).
Set CH0 voltage range	0x22	Possible values: 0x08, 0x04, 0x00, 0x06, 0x02 (50mV, 100mV, 200mV, 500mV, 1-5V).
Set CH1 voltage range	0x23	Possible values: 0x20, 0x10, 0x00, 0x12, 0x02 (50mV, 100mV, 200mV, 500mV, 1-5V).
Set sampling rate	0x94	Possible values: 0x11, 0x01, 0x10 (240kHz, 2.4MHz, 48MHz).
Trigger oscilloscope	0x33	Possible values: 0x00 == start sampling.