Datasheet

Data Sheet AD8641/AD8642/AD8643
Rev. E | Page 3 of 16
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
V
S
= 5.0 V, V
CM
= 2.5 V, T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
50 750 μV
AD8643 LFCSP only 1 mV
–40°C < T
A
< +85°C 1.5 mV
+85°C < T
A
< +125°C, V
CM
= 1.5 V 1.6 mV
Input Bias Current I
B
0.25 1 pA
–40°C < T
A
< +125°C 180 pA
Input Offset Current I
OS
0.5 pA
–40°C < T
A
< +125°C 60 pA
Input Voltage Range 0 3 V
Common-Mode Rejection Ratio CMRR V
CM
= 0 V to 2.5 V 74 93 dB
Large Signal Voltage Gain A
VO
R
L
= 10 kΩ, V
O
= 0.5 to 4.5 V 80 140 V/mV
Offset Voltage Drift ∆V
OS
/∆T –40°C < T
A
< +125°C 2.5 μV/°C
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
4.95 V
I
L
= 1 mA, –40°C to +125°C 4.94 V
Output Voltage Low V
OL
0.05 V
I
L
= 1 mA, –40°C to +125°C 0.01 0.05 V
Output Current I
OUT
±6 mA
POWER SUPPLY
Power Supply Rejection Ratio PSRR V
S
= 5 V to 26 V 90 107 dB
Supply Current/Amplifier I
SY
195 250 μA
–40°C < T
A
< +125°C 270 μA
DYNAMIC PERFORMANCE
Slew Rate SR 2 V/μs
Gain Bandwidth Product GBP AD8641, AD8642 3 MHz
AD8643 2.5 MHz
Phase Margin Ø
m
50 Degrees
NOISE PERFORMANCE
Voltage Noise e
N
p-p f = 0.1 Hz to 10 Hz 4.0 μV p-p
Voltage Noise Density e
N
f = 1 kHz 28.5 nV/√Hz
Current Noise Density i
N
f = 1 kHz 0.5 fA/√Hz