Precision Micropower, Low Noise CMOS,
Rail-to-Rail Input/Output Operational Amplifiers
AD8603/AD8607/AD8609
FEATURES
Low offset voltage: 50 μV maximum
Low input bias current: 1 pA maximum
Single-supply operation: 1.8 V to 5 V
Low noise: 22 nV/√Hz
Micropower: 50 μA maximum
Low distortion
No phase reversal
Unity gain stable
PIN CONFIGURATIONS
OUT
1
V–
2
+IN
3
AD8603
TOP VIEW
(Not to Scale)
5
V+
4
–IN
Figure 1. 5-Lead TSOT (UJ Suffix)
OUT A
1
–IN A
2
+IN A
3
8
AD8607
TOP VIEW
(Not to Scale)
V+
OUT B
+IN B
04356-002
04356-003
7
6
5
–IN B
APPLICATIONS
Battery-powered instrumentation
Multipole filters
Sensors
Low power ASIC input or output amplifiers
V–
4
Figure 2. 8-Lead MSOP (RM Suffix)
OUT A
1
8
V+
OUT B
–IN A
2
+IN A
3
AD8607
7
6
GENERAL DESCRIPTION
The AD8603/AD8607/AD8609 are single/dual/quad micro-
power rail-to-rail input and output amplifiers, respectively, that
feature very low offset voltage as well as low input voltage and
current noise.
These amplifiers use a patented trimming technique that achieves
superior precision without laser trimming. The parts are fully
specified to operate from 1.8 V to 5.0 V single supply or from
±0.9 V to ±2.5 V dual supply. The combination of low offsets, low
noise, very low input bias currents, and low power consumption
makes the AD8603/AD8607/AD8609 especially useful in portable
and loop-powered instrumentation.
The ability to swing rail to rail at both the input and output
enables designers to buffer CMOS ADCs, DACs, ASICs, and
other wide output swing devices in low power, single-supply
systems.
The AD8603 is available in a tiny 5-lead TSOT package. The
AD8607 is available in 8-lead MSOP and 8-lead SOIC packages.
The AD8609 is available in 14-lead TSSOP and 14-lead SOIC
packages.
–IN B
TOP VIEW
(Not to Scale)
5
+IN B
V–
4
Figure 3. 8-Lead SOIC (R Suffix)
OUT A
1
–IN A
2
14
13
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
04356-004
04356-005
+IN A
3
V+
4
+IN B
5
–IN B
6
OUT B
7
AD8609
TOP VIEW
(Not to Scale)
12
11
10
9
8
Figure 4. 14-Lead TSSOP (RU Suffix)
OUT A
1
–IN A
2
+IN A
3
V+
4
+IN B
5
–IN B
6
OUT B
7
14
OUT D
13
–IN D
AD8609
12
+IN D
TOP VIEW
11
V–
(Not to Scale)
10
+IN C
9
8
–IN C
OUT C
Figure 5. 14-Lead SOIC (R Suffix)
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2003–2008 Analog Devices, Inc. All rights reserved.
04356-001
AD8603/AD8607/AD8609
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Pin Configurations ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics ............................................................. 3
Absolute Maximum Ratings............................................................ 5
ESD Caution .................................................................................. 5
Typical Performance Characteristics ............................................. 6
Applications..................................................................................... 12
No Phase Reversal ...................................................................... 12
Input Overvoltage Protection ................................................... 12
Driving Capacitive Loads .......................................................... 12
Proximity Sensors....................................................................... 13
Composite Amplifiers................................................................ 13
Battery-Powered Applications .................................................. 13
Photodiodes ................................................................................ 13
Outline Dimensions ....................................................................... 14
Ordering Guide .......................................................................... 16
REVISION HISTORY
6/08—Rev. B to Rev. C
Changes to Table 1 ............................................................................ 3
Changes to Table 2 ............................................................................ 4
Changes to Figure 15 ........................................................................ 7
Changes to Figure 33 ...................................................................... 10
Changes to Figure 45 and Figure 47 ............................................. 13
Updated Outline Dimensions ....................................................... 14
Changes to Ordering Guide .......................................................... 16
6/05—Rev. A to Rev. B
Updated Figure 49 .......................................................................... 15
Changes to Ordering Guide .......................................................... 17
10/03—Rev. 0 to Rev. A
Added AD8607 and AD8609 Parts .................................. Universal
Changes to Specifications ................................................................ 3
Changes to Figure 35 ...................................................................... 10
Added Figure 41.............................................................................. 11
8/03—Revision 0: Initial Version
Rev. C | Page 2 of 16
AD8603/AD8607/AD8609
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
V
S
= 5 V, V
CM
= V
S
/2, T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
V
OS
Conditions
V
S
= 3.3 V @ V
CM
= 0.5 V and 2.8 V
−0.3 V < V
CM
< +5.2 V
−40°C < T
A
< +125°C, −0.3 V < V
CM
< +5.2 V
−40°C < T
A
< +125°C
−40°C < T
A
< +85°C
−40°C < T
A
< +125°C
Input Offset Current
I
OS
−40°C < T
A
< +85°C
−40°C < T
A
< +125°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
AD8603
AD8607/AD8609
Input Capacitance
OUTPUT CHARACTERISTICS
Output Voltage High
IVR
CMRR
A
VO
0 V < V
CM
< 5 V
−40°C < T
A
< +125°C
R
L
= 10 kΩ, 0.5 V < V
O
< 4.5 V
−0.3
85
80
400
250
C
DIFF
C
CM
V
OH
I
L
= 1 mA
−40°C to +125°C
I
L
= 10 mA
−40°C to +125°C
I
L
= 1 mA
−40°C to +125°C
I
L
= 10 mA
−40°C to +125°C
f = 10 kHz, A
V
= 1
1.8 V < V
S
< 5 V
V
O
= 0 V
−40°C <T
A
< +125°C
R
L
= 10 kΩ
G = ±1, 2 V step
R
L
= 100 kΩ
R
L
= 10 kΩ
R
L
= 10 kΩ, R
L
= 100 kΩ
0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
f = 1 kHz
f = 10 kHz
f = 100 kHz
Rev. C | Page 3 of 16
Min
Typ
12
40
1
0.2
Max
50
300
700
4.5
1
50
500
0.5
50
250
+5.2
Unit
μV
μV
μV
μV/°C
pA
pA
pA
pA
pA
pA
V
dB
dB
V/mV
V/mV
pF
pF
V
V
V
V
mV
mV
mV
mV
mA
Ω
dB
μA
μA
V/μs
μs
kHz
kHz
Degrees
Offset Voltage Drift
Input Bias Current
∆V
OS
/∆T
I
B
0.1
100
1000
450
1.9
2.5
4.97
4.97
16
160
±70
36
30
50
250
330
4.95
4.9
4.65
4.50
Output Voltage Low
V
OL
Short-Circuit Current
Closed-Loop Output Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Settling Time 0.1%
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Peak-to-Peak Noise
Voltage Noise Density
Current Noise Density
Channel Separation
I
SC
Z
OUT
PSRR
I
SY
80
100
40
50
60
SR
t
S
GBP
Ø
O
e
n p-p
e
n
i
n
C
S
0.1
23
400
316
70
2.3
25
22
0.05
−115
−110
3.5
μV
nV/√Hz
nV/√Hz
pA/√Hz
dB
dB
AD8603/AD8607/AD8609
V
S
= 1.8 V, V
CM
= V
S
/2, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
V
OS
Conditions
V
S
= 3.3 V @ V
CM
= 0.5 V and 2.8 V
−0.3 V < V
CM
< +1.8 V
−40°C < T
A
< +85°C, −0.3 V < V
CM
< +1.8 V
−40°C < T
A
< +125°C, −0.3 V < V
CM
< +1.7 V
−40°C < T
A
< +125°C
−40°C < T
A
< +85°C
−40°C < T
A
< +125°C
Input Offset Current
I
OS
−40°C < T
A
< +85°C
−40°C < T
A
< +125°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
AD8603
AD8607/AD8609
Input Capacitance
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Short-Circuit Current
Closed-Loop Output Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Settling Time 0.1%
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Peak-to-Peak Noise
Voltage Noise Density
Current Noise Density
Channel Separation
IVR
CMRR
A
VO
0 V < V
CM
< 1.8 V
−40°C < T
A
< +85°C
R
L
= 10 kΩ, 0.5 V < V
O
< 4.5 V
−0.3
80
70
150
100
C
DIFF
C
CM
V
OH
V
OL
I
SC
Z
OUT
PSRR
I
SY
I
L
= 1 mA
−40°C to +125°C
I
L
= 1 mA
−40°C to +125°C
f = 10 kHz, A
V
= 1
1.8 V < V
S
< 5 V
V
O
= 0 V
−40°C < T
A
< +85°C
R
L
= 10 kΩ
G = ±1, 1 V step
R
L
= 100 kΩ
R
L
= 10 kΩ
R
L
= 10 kΩ, R
L
= 100 kΩ
0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
f = 1 kHz
f = 10 kHz
f = 100 kHz
80
1.65
1.6
98
0.1
Min
Typ
12
40
Max
50
300
500
700
4.5
1
50
500
0.5
50
250
+1.8
Unit
μV
μV
μV
μV
μV/°C
pA
pA
pA
pA
pA
pA
V
dB
dB
V/mV
V/mV
pF
pF
V
V
mV
mV
mA
Ω
dB
μA
μA
V/μs
μs
kHz
kHz
Degrees
3.5
μV
nV/√Hz
nV/√Hz
pA/√Hz
dB
dB
Offset Voltage Drift
Input Bias Current
∆V
OS
/∆T
I
B
1
0.2
3000
2000
2.1
3.8
1.72
38
±10
36
100
40
60
80
50
60
SR
t
S
GBP
Ø
O
e
n p-p
e
n
i
n
C
S
0.1
9.2
385
316
70
2.3
25
22
0.05
−115
−110
Rev. C | Page 4 of 16
AD8603/AD8607/AD8609
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings apply at 25°C, unless otherwise noted.
Table 3.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
Output Short-Circuit Duration to GND
Storage Temperature Range
Lead Temperature (Soldering, 60 sec)
Operating Temperature Range
Junction Temperature Range
Rating
6V
GND to V
S
±6 V
Indefinite
−65°C to +150°C
300°C
−40°C to +125°C
−65°C to +150°C
Table 4. Package Characteristics
Package Type
5-Lead TSOT (UJ)
8-Lead MSOP (RM)
8-Lead SOIC_N (R)
14-Lead SOIC_N (R)
14-Lead TSSOP (RU)
1
θ
JA1
207
210
158
120
180
θ
JC
61
45
43
36
35
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
θ
JA
is specified for the worst-case conditions, that is, θ
JA
is specified for a
device soldered in a circuit board for surface-mount packages.
ESD CAUTION
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational section of
this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
Rev. C | Page 5 of 16
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