ADG1221/ADG1222/ADG1223
Rev. A | Page 8 of 16
TERMINOLOGY
I
DD
The positive supply current.
I
SS
The negative supply current.
V
D
(V
S
)
The analog voltage on Terminal D and Terminal S.
R
ON
The ohmic resistance between Terminal D and Terminal S.
R
FLAT(ON)
Flatness is defined as the difference between the maximum and
minimum value of on resistance, as measured over the specified
analog signal range.
I
S
(Off)
The source leakage current with the switch off.
I
D
(Off)
The drain leakage current with the switch off.
I
D
, I
S
(On)
The channel leakage current with the switch on.
V
INL
The maximum input voltage for Logic 0.
V
INH
The minimum input voltage for Logic 1.
I
INL
(I
INH
)
The input current of the digital input.
C
S
(Off)
The off switch source capacitance, measured with reference
to ground.
C
D
(Off)
The off switch drain capacitance, measured with reference
to ground.
C
D
, C
S
(On)
The on switch capacitance, measured with reference to ground.
C
IN
The digital input capacitance.
t
ON
The delay between applying the digital control input and the
output switching on (see Figure 26).
t
OFF
The delay between applying the digital control input and the
output switching off (see Figure 26).
t
BBM
Off time or on time measured between the 90% points of both
switches, when switching from one address state to another
(ADG1223 only).
Q
INJ
(Charge Injection)
A measure of the glitch impulse transferred from the digital
input to the analog output during 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 as a result 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 (Total Harmonic Noise Plus Distortion)
The ratio of the harmonic amplitude plus noise of the signal to
the fundamental.
ACPSRR (AC Power Supply Rejection Ratio)
Measures 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.
