Datasheet

AD549
Rev. H | Page 3 of 20
SPECIFICATIONS
@ 25°C and V
S
= ±15 V dc, unless otherwise noted; all minimum and maximum specifications are guaranteed; specifications in boldface
are tested on all production units at final electrical test, and results from those tests are used to calculate outgoing quality levels.
Table 1.
AD549J AD549K AD549L AD549S
Parameter Min Typ Max Min Typ Max Min Typ Max Min Typ Max Unit
INPUT BIAS CURRENT
1
Either Input, V
CM
= 0 V 150
250
75
100
40
60
75
100
fA
Either Input, V
CM
= ±10 V 150 250 75 100 40 60 75 100 fA
Either Input at T
MAX
,
V
CM
= 0 V
11 4.2 2.8 420 pA
Offset Current 50 30 20 30 fA
Offset Current at T
MAX
2.2 1.3 0.85 125 pA
INPUT OFFSET VOLTAGE
2
Initial Offset 0.5
1.0
0.15
0.25
0.3
0.5
0.3
0.5
mV
Offset at T
MAX
1.9 0.4 0.9 2.0
mV
vs. Temperature 10
20
2
5
5
10
10
15
μV/°C
vs. Supply 32
100
10
32
10
32
10
32
μV/V
vs. Supply, T
MIN
to T
MAX
32
100
10
32
10
32
32
50
μV/V
Long-Term Offset Stability 15 15 15 15 μV/month
INPUT VOLTAGE NOISE
f = 0.1 Hz to 10 Hz 4 4
6
4 4 μV p-p
f = 10 Hz 90 90 90 90 nV/√Hz
f = 100 Hz 60 60 60 60 nV/√Hz
f = 1 kHz 35 35 35 35 nV/√Hz
f = 10 kHz 35 35 35 35 nV/√Hz
INPUT CURRENT NOISE
f = 0.1 Hz to 10 Hz 0.7 0.5 0.36 0.5 fA rms
f = 1 kHz 0.22 0.16 0.11 0.16 fA/√Hz
INPUT IMPEDANCE
Differential
V
DIFF
= ±1 10
13
||1 10
13
||1 10
13
||1 10
13
||1 Ω||pF
Common Mode
V
CM
= ±10 V 10
15
||0.8 10
15
||0.8 10
15
||0.8 10
15
||0.8 Ω||pF
OPEN-LOOP GAIN
V
OUT
@ ±10 V, R
L
= 10 kΩ
300
1000
300
1000
300
1000
300
1000 V/mV
V
OUT
@ ±10 V, R
L
= 10 kΩ,
T
MIN
to T
MAX
300
800
300
800
300
800
300
800 V/mV
V
OUT
= ±10 V, R
L
= 2 kΩ
100
250
100
250
100
250
100
250 V/mV
V
OUT
= ±10 V, R
L
= 2 kΩ,
T
MIN
to T
MAX
80
200
80
200
80
200
25
150 V/mV
INPUT VOLTAGE RANGE
Differential
3
±20 ±20 ±20 ±20 V
Common-Mode Voltage
−10 +10 −10 +10 −10 +10 −10 +10
V
Common-Mode Rejection
Ratio
−10 V ≤ V
CM
≤ +10 V
80
90
90
100
90
100
90
100 dB
T
MIN
to T
MAX
76
80
80
90
80
90
80
90 dB