Sundance SMT384 - Manual (Page 13)

Version 1.4 Page 13 of 47 SMT384 User Manual
ADC Channels.
ADC Main Characteristics.
The main characteristics of the SMT384 ADCs are gathered into the following table.
Analogue Inputs
Input voltage range
AC coupled option. 2.4 Vp-p (11.5 dbm –
50 Ohm) Full scale - AC coupled via RF
transformer.
DC coupled option. 1.15 Vp-p (Gain
amplifier 6dB) centered around 0. DC
coupled via amplifier. Gain can be adjusted
to a required input amplitude centered
around 0. Minimm gain 6dBs, which should
allow input swing +/-0.575V as full scale.
Impedance
AC Coupled option. ADC single-ended
inputs are to be connected to an AC 50-
Ω
source. Source impedance matching
implemented between RF transformers and
ADC.
DC Coupled option. Impedance matching
done at the connector. To be connected to a
Dc 50-
Ω source.
Bandwidth ADC bandwidth: 750 MHz.
External Reference Input
Input Voltage Level 0.5 – 3.3 Volts peak-to-peak (AC-coupled)
Input Impedance 50-Ohm (Termination implemented at the
connector)
Frequency Range 0 – 100 MHz.
External Reference Output
Output Voltage Level 1.6 Volts peak-to-peak (AC-coupled)
Output Impedance 50-Ohm (Termination implemented at the
connector)
External Sampling Clock Input
Input Voltage Level 0.5 – 3.3 Volts peak-to-peak (AC-coupled)
Input Format
Single-ended or differential on option (3.3V
LVPECL).
Frequency range 10-125 MHz
External Trigger Inputs
Input Voltage Level 1.5-3.3 Volts peak-to-peak.
Format
DC-coupled and Single-ended (Termination
implemented at the connector). Differential