
6.3 TDC Characteristics
Symbol Parameter Min Typ Max Units
BIN
TDC
TDC bin size ps
INL
TDC
TDC integral nonlinearity
Input Pulse Width 3.3 ns
Input Pulse Spacing (Deadtime) 32 ns
6.4 Electrical Characteristics
6.4.1 Oscillator
The Ndigo250M-14 uses an OCXO oscillator with 25ppb stability. After power up the oscillator
needs to run for 10 minutes to reach this stability
6.4.2 Power Supply
Symbol Parameter Min Typ Max Units
I PCIe 5V rail power consumption A
VCC PCIe 5V rail power supply V
other PCIe power supply rails
6.4.3 Analog Inputs
DC coupled single ended analog inputs. (AC coupled available as an option.)
Symbol Parameter Min Typ Max Units
V
off
input center offset 0 2.5 V
V
in
Input Voltage V
off
-0.5 V
off
+0.5 V
V
p-p
Input Voltage Peak to Peak 1 V
Z
A
input impedance 50 Ω
H passband 0 450 Hz
6.4.4 Digita Inputs
AC coupled single ended digital inputs TRIGGER and GATE.
cronologic GmbH & Co. KG 50 Ndigo250M-14 User Guide
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