Sundance SMT391 - Manual (Page 7)

Version 1.5 Page 7 of 18 SMT391 User Manual
External trigger inputs
Signal format LVPECL
Frequency range Up to 25 MHz
SMT391 Output
Output Data Width 8-Bits
Data Format Binary
ADC Performance @ FS = 1 GSPS, FIN = 500 MHz (from Atmel datasheet)
Spurious Free Dynamic Range (SFDR)
-54dBc
Signal to Noise and Distortion (SINAD)
45dB
Effective Number Of Bits (ENOB)
6.8 Bits
Total Harmonic Distortion (THD)
-51dB
Cross-talk channel I versus channel Q (Cr)
FIN = 250 MHz, FS = 1 GHz
< -65dBc
Figure 1 - Main features.
Inputs / outputs
The SMT391 is an AC-coupled mode.
The AC-coupled option uses a twisted pair balun (MACOM TP-101) transformer to
convert a single ended signal to a balanced AC Coupled input on the ADC. The
figure on the following page shows this setup. Note that the input on the ADC is
differential and that for each of these two signals there are two pads on the ADC.
One pad connects to the transformer and the second pad is terminated through a 50
Ohm resistor to ground.
R1
R1
TP101
Input
Connector