3.1.1.2. STEMlab 125-14

3.1.1.2.1. 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.

3.1.1.2.2. 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.

3.1.1.2.3. Mechanical specifications

• Red_Pitaya_3Dmodel_v1.0.zip

3.1.1.2.4. Components

• ADC

• DAC

• FPGA (Zynq 7010)

• DC-DC converter

• Oscillator

• SRAM-DDR3

• QSPI

Note

STEMlab 125-14 Low Noise and STEMlab 125-14 4-Input feature Zynq 7020 instead of Zynq 7010.

3.1.1.2.5. Fast analog IO

• 3.1.1.2.5.1. Analog inputs
  • 3.1.1.2.5.1.1. General Specifications
    • 3.1.1.2.5.1.1.1. Jumpers
    • 3.1.1.2.5.1.1.2. Jumper orientation
    • 3.1.1.2.5.1.1.3. Input stage schematics
    • 3.1.1.2.5.1.1.4. Coupling
    • 3.1.1.2.5.1.1.5. Bandwidth
    • 3.1.1.2.5.1.1.6. Input noise
    • 3.1.1.2.5.1.1.7. Input channel isolation
    • 3.1.1.2.5.1.1.8. Harmonics
    • 3.1.1.2.5.1.1.9. Spurious frequency components
    • 3.1.1.2.5.1.1.10. Reference signals
    • 3.1.1.2.5.1.1.11. DC offset error
    • 3.1.1.2.5.1.1.12. Gain error
  • 3.1.1.2.5.1.2. Analog inputs calibration
• 3.1.1.2.5.2. Analog outputs
  • 3.1.1.2.5.2.1. General Specifications
    • 3.1.1.2.5.2.1.1. Output impedance
    • 3.1.1.2.5.2.1.2. Bandwidth
    • 3.1.1.2.5.2.1.3. Harmonics
    • 3.1.1.2.5.2.1.4. DC offset error
    • 3.1.1.2.5.2.1.5. Gain error
  • 3.1.1.2.5.2.2. Analog output calibration

3.1.1.2.6. Extension

• 3.1.1.2.6.1. Extension connector
  • 3.1.1.2.6.1.1. Extension connector E1
  • 3.1.1.2.6.1.2. Extension connector E2
  • 3.1.1.2.6.1.3. Auxiliary analog input channels
  • 3.1.1.2.6.1.4. Auxiliary analog output channels
  • 3.1.1.2.6.1.5. General purpose digital input/output channels: (N)
  • 3.1.1.2.6.1.6. Powering Red Pitaya through extension connector

3.1.1.2.7. External ADC clock

The ADC clock can be provided by:

• On board 125 MHz XO (default)

• From an external source/through extension connector E2 (R25, R26 should be moved to location R23, R24)

• Directly from the FPGA (R25, R26 should be relocated to R27, R28)

Schematic

Warning

We do not advise altering the board because users have reported problems after doing so. Every board made has undergone rigorous testing, which cannot be claimed for modified boards. Any non-Red Pitaya hardware modification will void the warranty, and we cannot guarantee support for modified boards.

Top side

Bottom side

3.1.1.2.8. Certificates

Besides the functional testing, Red Pitaya passed the safety and electromagnetic compatibility (EMC) tests at an external testing and certification institute.

• 3.1.1.2.8.1. CB test certificate - Safety
• 3.1.1.2.8.2. CB Test certificate - EMC
• 3.1.1.2.8.3. MET Approval Letter
• 3.1.1.2.8.4. NRTLC Certification Record

3.1.1.2.9. Cooling options

For additional cooling, we recommend a 30 mm or 25 mm fan. You can utilise the power connector on the board to power the fan, but please note that it supplies only 5 V. The power connector is located between the micro-SD socket and the host USB connector.

Note

The power connector is a standard 2-pin 0.1” connector. Supplies only 5 V.

• 3.1.1.2.9.1. Assembly
• 3.1.1.2.9.2. Measurements