Difference between revisions of "SainSmart DDS120"

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Revision as of 20:29, 1 November 2016

SainSmart DDS120

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

This device appears to be a rebadge of the Rocktech BM102 (or vice versa). The lsusb is exactly the same, the PCB is exactly the same (both have a "656517" and "102LJT1402" silkscreen), and the components used appear to be the same as well.

The device was apparently created by someone named "buudai" in 2012 (also reflected in the lsusb and in the former buudai.com website).

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

Hardware

USB: Cypress CY7C68013A-100AXC (FX2LP) (datasheet)
64-kbyte I²C EEPROM: Microchip 24LC64I (datasheet)
Crystal: 24MHz
145 MHz FastFET Opamps: AD8065ART-R2: (datasheet)

Or in newer hardware:

Dual 8bit, 100MSPS ADC: MXTronix MXT2088 (datasheet)
145 MHz FastFET Opamps: AD8065: (datasheet)
4x CMOS differential 4-channel analog mux/demux with logic-level conversion: Texas Instruments CD4052B(M) (datasheet)

Photos

Teardown 1:

Device, top
PCB, front
PCB, front
PCB, front
PCB, front
PCB, front
PCB, front
PCB, back
PCB, back
Box
Box
Box

Teardown 2 (purchased 03/2016):

Sticker
Package contents
Device, top
Device, bottom
USB
Connectors
PCB, top
PCB, bottom
MXTronix MXT2088
Cypress FX2
Microchip 24LC64I
TI CD4052BM
AMS1117-3.3
Unknown IC

Protocol

We use an open-source firmware for this device (i.e., not the vendor firmware/protocol), hence we do not need to know the vendor protocol. There is some historic vendor firmware/protocol info for those interested, though.

Firmware

In order to use this device, the sigrok-firmware-fx2lafw (>= 0.1.4) firmware is required.

See this section for technical details about the firmware/hardware.

Resources

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