FMC150 User Manual
r1.6
FMC150 User Manual
January 2012
www.4dsp.com
- 10 -
Number of channels
2
Channel resolution
16-bit
Output voltage range
1Vp-p
Output impedance
50Ω (AC coupled)
Analogue output bandwidth
82MHz 5th order Chebyshev low-pass filter
Slope / Roll-Off = -124.9 dB / decade
Difference between the signal strengths at 65 MHz and 75 MHz = 0.6
dB
Output filter can be bypassed with 0Ω resistors.
Low-cut off is 3MHz due to the output transformer stage.
THD
-67 dBc
External Clock/Reference Input
Input Level
0.1 – 1.3 Vp-p
Input impedance
50Ω (AC coupled)
Input bandwidth
3-800MHz (Reference clock limited to 500MHz)
External Trigger input
Format
LVTLL/LVCMOS
Logic ‘0’
max 0.8V / Logic ‘1’
min 2.0V
Frequency range
Up to 125 MHz
ADC Output
Data width
LVDS 7-pairs DDR per channel
Data Format
Offset binary or 2’s complement
Sampling Frequency Range
up to 250MHz
DAC Input
Data width
LVDS 8-pairs DDR
Data Format
Offset binary or 2’s complement
Sampling Frequency Range
up to 800MHz
Internal Sampling Clock
Format
LVPECL 491.52 MHz (contact factory for different frequency options)
Frequency Range
ADC: 245.76 MHz (contact factory for different frequency options)
DAC: 491.52 MHz (contact factory for different frequency options)
Table 2 : FMC150 daughter card main characteristics
4.4 Analog input channels
The AC coupled input uses wideband RF transformers (TC1-1T). Two transformers are used
to compensate for imbalance and therefore improving harmonic distortion performance. A
capacitor in front of the transformer blocks the DC path to ground which will protect the signal
source in case a DC-coupled signal with offset is accidentally connected to the FMC150.
