Datasheet

ADG918/ADG919 Data Sheet
Rev. D | Page 10 of 16
TERMINOLOGY
V
DD
Most positive power supply potential.
I
DD
Positive supply current.
GND
Ground (0 V) reference.
CTRL
Logic control input.
V
INL
Maximum input voltage for Logic 0.
V
INH
Minimum input voltage for Logic 1.
I
INL
(I
INH
)
Input current of the digital input.
C
IN
Digital input capacitance.
t
ON
Delay between applying the digital control input and the output
switching on.
t
OFF
Delay between applying the digital control input and the output
switching off.
t
RISE
Rise time; time for the RF signal to rise from 10% to 90% of the
on level.
t
FALL
Fall time; time for the RF signal to fall from 90% to 10% of the
on level.
Off Isolation
The attenuation between the input and output ports of the
switch when the switch control voltage is in the off condition.
Insertion Loss
The attenuation between the input and output ports of the
switch when the switch control voltage is in the on condition.
P
–1 dB
1 dB compression point. The RF input power level at which the
switch insertion loss increases by 1 dB over its low level value. It
is a measure of how much power the on switch can handle
before the insertion loss increases by 1 dB.
IP
3
Third order intermodulation intercept. This is a measure of the
power in false tones that occur when closely spaced tones are
passed through a switch, whereby the nonlinearity of the switch
causes these false tones to be generated.
Return Loss
The amount of reflected power relative to the incident power at
a port. Large return loss indicates good matching. By measuring
return loss, the VSWR (voltage standing wave ratio) can be
calculated from conversion charts. VSWR indicates the degree
of matching present at a switch RF port.
Video Feedthrough
Spurious signals present at the RF ports of the switch when the
control voltage is switched from high to low or low to high
without an RF signal present.