3.1.1.3. STEMlab 125-14 external clock¶

This STEMlab version is standard STEMlab 125-14 modified in such a way that the ADC and DAC clock can be provided from an external source clock. An external clock should be connected to the Ext ADC CLK- and + pins. According to the ADC spec, external clock signal levels should be LVDS in the range from 1MHz to 125MHz.

Note

The OS will not boot without providing an external clock.

../../../_images/Extension_connector.png

3.1.1.3.1. Technical specifications¶

Basic
Processor	DUAL CORE ARM CORTEX A9
FPGA	FPGA Xilinx Zynq 7010 SOC
RAM	512 MB (4 Gb)
System memory	Micro SD up to 32 GB
Console connection	Micro USB
Power connector	Micro USB
Power consumption	5 V, 2 A max

Connectivity
Ethernet	1 Gbit
USB	USB 2.0
WIFI	requires WIFI dongle

RF inputs
RF input channels	2
Sample rate	125 MS/s
ADC resolution	14 bit
Input impedance	1 MOhm / 10 pF
Full scale voltage range	±1 V (LV) and ±20 V (HV)
Input coupling	DC
Absolute max. Input voltage range	30 V
Input ESD protection	Yes
Overload protection	Protection diodes
Bandwidth	DC - 60 MHz

RF outputs
RF output channels	2
Sample rate	125 MS/s
DAC resolution	14 bit
Load impedance	50 Ohm
Voltage range	±1 V
Short circut protection	Yes
Connector type	SMA
Output slew rate	2 V / 10 ns
Bandwidth	DC - 50 MHz

Extension connector
Digital IOs	16
Analog inputs	4
Analog inputs voltage range	0-3.5 V
Sample rate	100 kS/s
Resolution	12 bit
Analog outputs	4
Analog outputs voltage range	0-1.8 V
Communication interfaces	I2C, SPI, UART
Available voltages	+5 V, +3.3 V, -4 V
external ADC clock	yes

Synchronisation
Trigger input	Through extension connector
Daisy chain connection	Over SATA connection (up to 500 Mbps)
Ref. clock input	N/A

Note

For more information, please refer to the Product comparison table.

3.1.1.3.2. Schematics¶

Red_Pitaya_Schematics_v1.0.1.pdf

Note

FULL HW schematics for the Red Pitaya board are not available. Red Pitaya has open source code but not open hardware schematics. Nonetheless, DEVELOPMENT schematics are available. This schematic will give you information about HW configuration, FPGA pin connections, and similar.

3.1.1.3.3. Mechanical specifications¶

Red_Pitaya_3Dmodel_v1.0.zip

3.1.1.3.4. ADC specifications¶

Data sheet

3.1.1.3.5. RP clock wiring¶

External ADC clock

For all other specifications please refer to the standard STEMlab 125-14 specs.