ADG779
Rev. A | Page 7 of 12
TERMINOLOGY
V
DD
Most positive power supply potential.
I
DD
Positive supply current.
GND
Ground (0 V) reference.
S
Source terminal. Can be an input or an output.
D
Drain terminal. Can be an input or an output.
IN
Logic control input.
V
D
(V
S
)
Analog voltage on drain (D) and source (S) terminals.
R
ON
Ohmic resistance between the D and S.
R
FLAT (ON)
Flatness is defined as the difference between the maximum and
minimum value of on resistance as measured.
ΔR
ON
On-resistance mismatch between any two channels.
I
S
(Off)
Source leakage current with the switch off.
I
D
(Off)
Drain leakage current with the switch off.
I
D
, I
S
(On)
Channel leakage current with the switch on.
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
S
(Off)
Off switch source capacitance. Measured with reference to
ground.
C
D
(Off)
Off switch drain capacitance. Measured with reference to
ground.
C
D
, C
S
(On)
On switch capacitance. Measured with reference to ground.
C
IN
Digital input capacitance.
t
ON
Delay time between the 50% and 90% points of the digital input
and switch on condition.
t
OFF
Delay time between the 50% and 90% points of the digital input
and switch off condition.
t
BBM
On or off time measured between the 80% points of both
switches when switching from one to another.
Charge Injection
A measure of the glitch impulse transferred from the digital
input to the analog output during on/off switching.
Off Isolation
A measure of unwanted signal coupling through an off switch.
Crosstalk
A measure of unwanted signal that is coupled through from one
channel to another because of parasitic capacitance.
−3 dB Bandwidth
The frequency at which the output is attenuated by 3 dB.
On Response
The frequency response of the on switch.
Insertion Loss
The loss due to the on resistance of the switch.
THD + N
The ratio of harmonic amplitudes plus noise of a signal to the
fundamental.
