4DSP FMC150 User Manual - Page 10

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FMC150 User Manual
Number of channels
Channel resolution
Output voltage range
Output impedance
Analogue output bandwidth
THD
Input Level
Input impedance
Input bandwidth
Format
Frequency range
Data width
Data Format
Sampling Frequency Range
Data width
Data Format
Sampling Frequency Range
Format
Frequency Range

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.
January 2012
2
16-bit
1Vp-p
50Ω (AC coupled)
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.
-67 dBc
External Clock/Reference Input
0.1 – 1.3 Vp-p
50Ω (AC coupled)
3-800MHz (Reference clock limited to 500MHz)
External Trigger input
LVTLL/LVCMOS
Logic '0'  max 0.8V / Logic '1'  min 2.0V
Up to 125 MHz
LVDS 7-pairs DDR per channel
Offset binary or 2's complement
up to 250MHz
LVDS 8-pairs DDR
Offset binary or 2's complement
up to 800MHz
Internal Sampling Clock
LVPECL 491.52 MHz (contact factory for different frequency options)
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
FMC150 User Manual
www.4dsp.com
ADC Output
DAC Input
r1.6
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