Datasheet

AD820
Rev. H | Page 5 of 24
V
S
= ±5 V @ T
A
= 25°C, V
CM
= 0 V, V
OUT
= 0 V, unless otherwise noted.
Table 2.
AD820A AD820B
Parameter Conditions Min Typ Max Min Typ Max Unit
DC PERFORMANCE
Initial Offset 0.1 0.8 0.3 0.4 mV
Maximum Offset over Temperature 0.5 1.5 0.5 1 mV
Offset Drift 2 2 μV/°C
Input Bias Current V
CM
= −5 V to +4 V 2 25 2 10 pA
At T
MAX
0.5 5 0.5 2.5 nA
Input Offset Current 2 20 2 10 pA
At T
MAX
0.5 0.5 nA
Open-Loop Gain V
OUT
= −4 V to +4 V
R
L
= 100 kΩ 400 1000 400 1000 V/mV
T
MIN
to T
MAX
400 400 V/mV
R
L
= 10 kΩ 80 150 80 150 V/mV
T
MIN
to T
MAX
80 80 V/mV
R
L
= 1 kΩ 20 30 20 30 V/mV
T
MIN
to T
MAX
10 10 V/mV
NOISE/HARMONIC PERFORMANCE
Input Voltage Noise
f = 0.1 Hz to 10 Hz 2 2 μV p-p
f = 10 Hz 25 25 nV/√Hz
f = 100 Hz 21 21 nV/√Hz
f = 1 kHz 16 16 nV/√Hz
f = 10 kHz 13 13 nV/√Hz
Input Current Noise
f = 0.1 Hz to 10 Hz 18 18 fA p-p
f = 1 kHz 0.8 0.8 fA/√Hz
Harmonic Distortion R
L
= 10 kΩ
f = 10 kHz V
OUT
= ±4.5 V −93 −93 dB
DYNAMIC PERFORMANCE
Unity Gain Frequency 1.9 1.8 MHz
Full Power Response V
OUT
p-p = 9 V 105 105 kHz
Slew Rate 3 3 V/μs
Settling Time V
OUT
= 0 V to ±4.5 V
To 0.1% 1.4 1.4 μs
To 0.01% 1.8 1.8 μs
INPUT CHARACTERISTICS
Common-Mode Voltage Range
1
T
MIN
to T
MAX
−5.2 +4 −5.2 +4 V
CMRR V
CM
= −5 V to +2 V 66 80 72 80 dB
T
MIN
to T
MAX
66 66 dB
Input Impedance
Differential 10
13
||0.5 10
13
||0.5 Ω||pF
Common Mode 10
13
||2.8 10
13
||2.8 Ω||pF