ADG5408/ADG5409 Data Sheet
Rev. C | Page 18 of 24
TERMINOLOGY
I
DD
I
DD
represents the positive supply current.
I
SS
I
SS
represents the negative supply current.
V
D
, V
S
V
D
and V
S
represent the analog voltage on Terminal D and
Terminal S, respectively.
R
ON
R
ON
is the ohmic resistance between Terminal D and
Terminal S.
∆R
ON
∆R
ON
represents the difference between the R
ON
of any two
channels.
R
FLAT (ON)
The difference between the maximum and minimum value of
on resistance as measured over the specified analog signal range
is represented by R
FLAT (ON)
.
I
S
(Off)
I
S
(Off) is the source leakage current with the switch off.
I
D
(Off)
I
D
(Off) is the drain leakage current with the switch off.
I
D
(On), I
S
(On)
I
D
(On) and I
S
(On) represent the channel leakage currents with
the switch on.
V
INL
V
INL
is the maximum input voltage for Logic 0.
V
INH
V
INH
is the minimum input voltage for Logic 1.
I
INL
, I
INH
I
INL
and I
INH
represent the low and high input currents of the
digital inputs.
C
D
(Off)
C
D
(Off) represents the off switch drain capacitance, which is
measured with reference to ground.
C
S
(Off)
C
S
(Off) represents the off switch source capacitance, which is
measured with reference to ground.
C
D
(On), C
S
(On)
C
D
(On) and C
S
(On) represent on switch capacitances, which
are measured with reference to ground.
C
IN
C
IN
represents digital input capacitance.
t
ON
(EN)
t
ON
(EN) represents the delay time between the 50% and 90%
points of the digital input and switch on condition.
t
OFF
(EN)
t
OFF
(EN) represents the delay time between the 50% and 90%
points of the digital input and switch off condition.
t
TRANSITION
Delay time between the 50% and 90% points of the digital
inputs and the switch on condition when switching from one
address state to another.
t
D
t
D
represents the off time measured between the 80% point of
both switches when switching from one address state to
another.
Off Isolation
Off isolation is a measure of unwanted signal coupling through
an off channel.
Charge Injection
Charge injection is a measure of the glitch impulse transferred
from the digital input to the analog output during switching.
Crosstalk
Crosstalk is a measure of unwanted signal that is coupled
through from one channel to another as a result of parasitic
capacitance.
Bandwidth
Bandwidth is the frequency at which the output is attenuated
by 3 dB.
On Response
On response is the frequency response of the on switch.
Total Harmonic Distortion + Noise (THD + N)
The ratio of the harmonic amplitude plus noise of the signal to
the fundamental is represented by THD + N.
AC Power Supply Rejection Ratio (ACPSRR)
ACPSRR is a measure of the ability of a part to avoid coupling
noise and spurious signals that appear on the supply voltage pin
to the output of the switch. The dc voltage on the device is
modulated by a sine wave of 0.62 V p-p. The ratio of the
amplitude of signal on the output to the amplitude of the
modulation is the ACPSRR.
