Data Sheet AD8468
Rev. A | Page 3 of 12
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
V
CC
= 2.5 V, T
A
= −40°C to +125°C. Typical values are T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
DC INPUT CHARACTERISTICS
Voltage Range V
P
, V
N
V
CC
= 2.5 V to 5.5 V −0.2 V
CC
+ 0.2 V
Common-Mode Range V
CC
= 2.5 V to 5.5 V −0.2 V
CC
+ 0.2 V
Differential Voltage V
CC
= 2.5 V to 5.5 V V
CC
V
Offset Voltage V
OS
−10.0 ±3 +10.0 mV
Bias Current I
P
, I
N
−0.4 +0.4 µA
Offset Current −1.0 +1.0 µA
Capacitance C
P
, C
N
1 pF
Resistance, Differential Mode −0.5 V to V
CC
+ 0.5 V 200 7000 kΩ
Resistance, Common Mode −0.5 V to V
CC
+ 0.5 V 100 4000 kΩ
Active Gain A
V
80 dB
Common-Mode Rejection CMRR V
CC
= 2.5 V, V
CM
= −0.2 V to +2.7 V 45 dB
V
CC
= 5.5 V 45 dB
SHUTDOWN PIN CHARACTERISTICS
1
V
IH
Comparator is operating 2.0 V
CC
V
V
IL
Shutdown guaranteed −0.2 +0.4 +0.4 V
I
IH
V
IH
= V
CC
−6 +6 µA
Sleep Time t
SD
l
CC
< 100 µA 300 ns
Wake-Up Time t
H
V
PP
= 10 mV, output valid 150 ns
DC OUTPUT CHARACTERISTICS
Output Voltage High Level V
OH
I
OH
= 0.8 mA V
CC
− 0.4 V
Output Voltage Low Level V
OL
I
OL
= 0.8 mA 0.4 V
AC PERFORMANCE
2
Rise Time/Fall Time t
R
, t
F
10% to 90%, V
CC
= 2.5 V 25 to 50 ns
10% to 90%, V
CC
= 5.5 V 45 to 75 ns
Propagation Delay t
PD
V
OD
= 10 mV, V
CC
= 2.5 V 30 to 50 ns
V
OD
= 50 mV, V
CC
= 5.5 V 35 to 60 ns
Propagation Delay Skew—Rising to Falling
Transition
V
CC
= 2.5 V 4.5 ns
V
CC
= 5.5 V 8 ns
Overdrive Dispersion 10 mV < V
OD
< 125 mV 12 ns
Common-Mode Dispersion −0.2 V < V
CM
< V
CC
+ 0.2 V 1.5 ns
POWER SUPPLY
Supply Voltage Range V
CC
2.5 5.5 V
Positive Supply Current I
VCC
V
CC
= 2.5 V 550 800 A
V
CC
= 5.5 V 800 1300 A
Power Dissipation P
D
V
CC
= 2.5 V 1.375 2.0 mW
V
CC
= 5.5 V 4.95 7.15 mW
Power Supply Rejection Ratio PSRR V
CC
= 2.5 V to 5.5 V −50 dB
Shutdown Current I
SD
V
CC
= 2.5 V to 5.5 V 250 350 A
1
The output is in a high impedance mode when the device is in shutdown mode. Note that this feature should be used with care because the enable/disable time is
much longer than with a true tristate output.
2
V
IN
= 100 mV square input at 1 MHz, V
CM
= 0 V, C
L
= 15 pF, V
CCI
= 2.5 V, unless otherwise noted.
