XRM2-ADC-D3/1G5 - IF/Baseband Signal Sampling


  • IF/Baseband Signal Sampling

Board Features

  • Alpha Data XRM2 I/O Module
  • Dual 8-bit 1.5Gsps ADCs
  • External Clock Input
  • Thermal monitoring of the ADCs


The XRM2-ADC-D3/1G5 is an XRM2 I/O Module, providing two Analog to Digital converters with 8-bit resolution and sampling rates up to 1.5Gsps.

Aimed at IF/Baseband Signal Sampling, the sampling clock can be sourced from either an external clock source or from a clock generated within the attached FPGA board. An Auxiliary I/O port is provided for use as a trigger control or for general purpose signaling.An additional two ports are available for use as high-speed interconnect between boards for synchronisation.

The XRM2-ADC-D3/1G5 is based around the ADC08D1500 by National Semiconductors. A built-in thermal monitor allows the user to check the operating temperature of the ADC. Provided as part of the sample design is the functionality to read the temperature of the device, and software to monitor this and recalibrate the ADC if the thermal drift is sufficient. The software will also shut the ADC down if the device starts to go over the maximum operating temperature.

Board Format

Alpha Data XRM2 I/O Module

Environmental Specifications

Temperature Limits:

CodeCooling OptionOperating Temp.Storage Temp.
AC0Air Cooled Commercial0°C+55°C-40°C+85°C

Operating Humidity range:

Up to 95% (non-condensing)

EMC Conformity:

FCC 47CFR Part 2
EN55022:2010 Equipment ClassB

For more information on the operating conditions for the different cooling options go to: Alpha Data Environmental Specification Page.

Or read: Alpha Data Environment Specification (PDF).

I/O Interfaces

Interface TypeQtyDescription
ANALOG I/O (Front Panel)
ADC2Dual Analog to Digital Converters
Resolution: 8-bit
Max Clock Rate: 1.5Gsps
Impedance: 50Ω
Levels: Range1: ±435mV nominal|Range2: ±325mV nominal
Connector: SMA
Range selectable via FPGA and ADC serial port
Note: Exceeding the maximum voltage limit may result in permanent degradation of converter
DISCRETE I/O (Front Panel)
External clock input1External clock input
Max Clock Rate: 1500MHz
Bandwidth: 200MHz to 1500MHz, single edge sampling 500MHz to 1500MHz, dual edge sampling
Impedance: 50Ω (AC coupled)
Levels: ±200mV to ±1V - ±500mV nominal
Connector: SMA
Note: Exceeding the maximum voltage limit may result in permanent degradation of converter
External clock output1External clock out
Max Clock Rate: 1500MHz
Bandwidth: 20MHz to 500MHz - User clock or 300MHz to 1500MHz GTP
Impedance: 50Ω (AC Coupled)
Levels: ±400mV nominal
Connector: SMA
Source: GTP or User Clock from XRC board.
Clock Rate:
20MHz to 500MHz - User clock
300MHz to 1500MHz GTP
Auxiliary I/O1Auxiliary I/O
Impedance: Input: 4k7Ω (DC Coupled)
Levels: +3V3 LVTTL
Connector: SMA
DISCRETE I/O (PCB Connector)
Synchronisation I/O2Synchronisation I/O
Levels: 2V5 Logic (DC coupled)
Connector: U.FL - Limited Access in assembled system
User configurable as inputs or outputs, signals direct to FPGA pins.
Note: signals on these connectors must be restricted to 2V5 logic otherwise damage may result.


Example UCF, HDL files and Application software are provided with the board.

Ordering Code
ParametercodeParameter Description

blank = No Heastink,
/HTSK-XRM-ADC-HS-1 = Heatsink Fitted

I/O Voltagev

blank = +3.3V - LVTTL I/O levels,
/5V = +5V - TTL I/O Levels

Contact sales for other ordering options

Sample Product Code:



  • XRM2-ADC-D3-1G5 Board
  • One Year Warranty
  • One Year Technical Support

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