Precision Amplifiers (VOS < 1 mV, Bandwidth < 50 MHz)
Voted as one of the Hot 100 Electronic
Products of 2009, EDN Magazine
Low Input Bias Current (IB ≤ 50 pA) Amplifiers
ADA4627–1: Low Noise, Low Bias Current, JFET Operational Amplifier
The ADA4627–1 is a wide bandwidth precision amplifier featuring low noise, very low offset, drift, and bias current. Operation is specified from 65 V to
615 V dual supply. This amplifier combines the best specifications of precision dc and high speed ac op amps.
Features
+V
S
•ꢀLow offset voltage: 200 mV maximum
•ꢀOffset drift: 1 mV/°C typical
+V
ADA4627-1
S
–IN
AD8271
10kꢀ
•ꢀVery low input bias current: 5 pA maximum
•ꢀExtended temperature range: −40°C to +125°C
•ꢀ65 V to 615 V dual supply
R
–V
F1
S
10kꢀ
10kꢀ
2kꢀ
R
20ꢀ
G
OUT
R
F2
•ꢀGuaranteed GBW: 16 MHz
10kꢀ
2kꢀ
+V
S
•ꢀVoltage noise: 6.1 nV/√Hz at 1 kHz
•ꢀHigh slew rate: 60 V/ms
–V
S
V
= ꢁ15V
S
+IN
ADA4627-1
–V
S
Applications
NOTES
•ꢀHigh impedance sensors
•ꢀPhotodiode amplifier
•ꢀPrecision instrumentation
•ꢀPhase-locked loop filters
•ꢀHigh end professional audio
•ꢀMedical
1. 10kꢀ THIN FILM TRIMMED RESISTOR
ARE INTERNAL TO THE AD8271.
Building an in-amp with gain = 201. Refer to Circuit Note CN-0122 for more
information on this reference circuit at www.analog.com/cn0122.
Low Input Bias Current ( IB ≤ 50 pA) Amplifiers
Supply Rail- BW @ Slew
TcVOS
(mv/°C
Typ)
CMRR PSRR AVO
Noise
Min (nV/ z) (pA/
(dB) (dB) @ 1 kHz @ 1 kHz
Noise
Price
@ 1k
(OEM $US)
Part
Number Amps
No. of
VOS Max
(mV)
IS/Amp
(mA Max)
Process
Voltage
to- ACL Min Rate
Min
Min
√H
√
H
z)
IB Max
Packaging
(Min/Max) Rail1 (MHz) (V/ms)
(dB)
JFET
JFET
JFET
BiJET
AD549L
AD549K
AD549J
OP285
1
1
1
2
5
5
5
9
3
3
0.5
0.25
1
10
5
90
90
80
80
90
90
80
85
109
109
109
108
35
35
35
6
0.22
0.22
0.22
0.9
0.700
0.700
0.700
2.500
60 fA
100 fA
250 fA
350 nA
TO-99
TO-99
23.61
19.11
13.68
2.40
62.5/618
62.5/618
62.5/618
64.5/618
3
20
1
TO-99
22
0.25
SOIC/PDIP
AD8663
AD8667
AD8669
1
2
4
SOIC/LFCSP
MSOP/SOIC
SOIC/TSSOP
1.17
1.58
2.70
0.3 pA
typ
CMOS
CMOS
CMOS
CMOS
CMOS
JFET
5/16
1.8/6
SS
RRIO
RRIO
RRIO
SS
0.54
0.4
10
24
4
0.6
0.1
5
0.3
0.3
0.3
0.5
0.16
0.75
0.75
2.2
2
1.5
1
87
85
85
80
90
76
90
68
70
95
80
80
70
95
80
90
67
80
115
112
109
105
106
103
106
107
108
23
25
8
0.05
0.05
0.01
0.05
0.1
0.285
0.040
1.200
1.300
1.550
0.850
0.290
0.040
1.050
AD8603
AD8607
AD8609
1
2
4
SOT-23
MSOP/SOIC
SOIC/TSSOP
0.68
1.02
1.85
1 pA
1 pA
1 pA
1 pA
1 pA
1 pA
1 pA
1 pA
AD8605
AD8606
AD8608
1
2
4
WLCSP/SOT-23
WLCSP/MSOP/SOIC
SOIC/TSSOP
0.68
1.19
1.58
2.7/6
1
AD8615
AD8616
AD8618
1
2
4
SOT-23
MSOP/SOIC
SOIC/TSSOP
0.76
1.29
2.29
2.7/6
12
3.5
5
1.5
4
10
12
16
27.5
25
8
AD8661
AD8662
AD8664
1
2
4
SOIC/LFCSP
MSOP/SOIC
SOIC/TSSOP
1.08
1.37
2.23
5/16
AD8627
AD8626
AD8625
1
2
4
SC70/SOIC
MSOP/SOIC
SOIC/TSSOP
1.60
2.63
4.09
SS
5
2.5
2.5
1
0.5
65/613
62.5/613
AD8641
AD8642
AD8643
1
2
4
SC70/SOIC
MSOP/SOIC
SOIC/LFCSP
1.47
2.35
3.85
JFET
SS
3.5
0.4
10
3
0.0005
0.05
0.05
AD8613
AD8617
AD8619
1
2
4
SC70/SOT-23
MSOP/SOIC
SOIC/TSSOP
0.46
0.71
1.11
CMOS
CMOS
1.8/5.5 RRIO
0.1
5
AD8691
AD8692
AD8694
1
2
4
SC70/SOT-23
MSOP/SOIC
SOIC/TSSOP
0.51
0.64
0.90
2.7/6
SS
1.3
www.analog.com/opamps
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