Data Sheet
FEATURES
Low offset voltage: 100 µV maximum at V
S
= 5 V
Low input bias current: 1 pA maximum
Single-supply operation: 5 V to 16 V
Low noise: 10 nV/√Hz
Wide bandwidth: 4 MHz
Unity-gain stable
Small package options
3 mm × 3 mm 8-lead LFCSP
8-lead MSOP and narrow SOIC
14-lead TSSOP and narrow SOIC
Low Noise, Precision 16 V CMOS,
Rail-to-Rail Operational Amplifiers
AD8661/AD8662/AD8664
PIN CONFIGURATIONS
NIC
1
8
NIC
NIC 1
–IN 2
+IN 3
05200-002
8 NIC
7
V+
–IN
2
TOP VIEW
+IN
3
(Not to Scale)
6
OUT
5
NIC
V–
4
AD8661
AD8661
TOP VIEW
(Not to Scale)
7 V+
6 OUT
5 NIC
05200-035
V– 4
NIC = NO INTERNALCONNECTION
NOTES
1. NIC = NO INTERNAL CONNECTION.
2. CONNECT THE EXPOSED PAD TO V–.
Figure 1.
AD8661,
8-Lead SOIC
(R-8)
OUT A
1
–IN A
2
8
Figure 2.
AD8661,
8-Lead LFCSP
(CP-8-13)
OUT A
1
–IN A
2
05200-001
V+
OUT B
8
V+
OUT B
05200-004
APPLICATIONS
Sensors
Medical equipment
Consumer audio
Photodiode amplification
ADC drivers
AD8662
7
AD8662
TOP VIEW
(Not to Scale)
7
6
5
TOP VIEW
+IN A
3
(Not to Scale)
6
–IN B
5
+IN B
V–
4
+IN A
3
V–
4
–IN B
+IN B
Figure 3.
AD8662,
8-Lead SOIC
(R-8)
OUT A
1
–IN A
2
+IN A
3
14
Figure 4.
AD8662,
8-Lead MSOP
(RM-8)
OUT A
1
–IN A
2
+IN A
3
14
OUT D
–IN D
+IN D
OUT D
–IN D
AD8664
13
12
AD8664
13
12
TOP VIEW
V+
4
(Not to Scale)
11
V–
10
9
8
+IN D
TOP VIEW
(Not to Scale)
11
V–
V+
4
10
9
8
+IN B
5
–IN B
6
OUT B
7
+IN C
–IN C
OUT C
05200-036
+IN B
5
–IN B
6
OUT B
7
+IN C
–IN C
OUT C
05200-037
Figure 5.
AD8664,
14-Lead SOIC
(R-14)
Figure 6.
AD8664,
14-Lead TSSOP
(RU-14)
GENERAL DESCRIPTION
The
AD8661/AD8662/AD8664
1
are rail-to-rail output, single-
supply amplifiers that use the Analog Devices, Inc., patented
DigiTrim® trimming technique to achieve low offset voltage.
The
AD8661/AD8662/AD8664
series features extended
operating ranges, with supply voltages up to 16 V. It also
features low input bias current, wide signal bandwidth,
and low input voltage and current noise.
The combination of low offset, very low input bias current,
and a wide supply range makes these amplifiers useful in a wide
variety of applications usually associated with higher priced JFET
amplifiers. Systems using high impedance sensors, such as
photodiodes, benefit from the combination of low input bias
current, low noise, low offset, and wide bandwidth. The wide
operating voltage range meets the demands of high performance
analog-to-digital converters (ADCs) and digital-to-analog
1
converters (DACs). Audio applications and medical monitoring
equipment can take advantage of the high input impedance, low
voltage, low current noise, and wide bandwidth.
The single
AD8661
is available in a narrow 8-lead SOIC package
and a very thin, dual lead, 8-lead LFCSP. The
AD8661
SOIC
package is specified over the extended industrial temperature
range of −40°C to +125°C. The
AD8661
LFCSP is specified over
the industrial temperature range of −40°C to +85°C. The
AD8662
is available in a narrow 8-lead SOIC package and an 8-lead MSOP,
both specified over the extended industrial temperature range of
−40°C to +125°C. The
AD8664
is available in a narrow 14-lead
SOIC package and a 14-lead TSSOP, both with an extended
industrial temperature range of −40°C to +125°C.
Protected by U.S. Patents 6,194,962 and 6,696,894.
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Tel: 781.329.4700 ©2005–2016 Analog Devices, Inc. All rights reserved.
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Rev. E
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.
AD8661/AD8662/AD8664
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Pin Configurations ........................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
AD8661/AD8662/AD8664 Electrical Characteristics—SOIC,
MSOP, and TSSOP ....................................................................... 3
AD8661/AD8662/AD8664 Electrical Characteristics—SOIC,
MSOP, and TSSOP ....................................................................... 4
Data Sheet
AD8661 Electrical Characteristics—LFCSP Only ....................5
AD8661 Electrical Characteristics—LFCSP Only ....................6
Absolute Maximum Ratings ............................................................7
Thermal Resistance .......................................................................7
Typical Performance Characteristics ..............................................8
Outline Dimensions ....................................................................... 13
Ordering Guide .......................................................................... 15
REVISION HISTORY
7/2016—Rev. D to Rev. E
Changed CP-8-2 to CP-8-13 ........................................ Throughout
Changes to Figure 1 and Figure 2 ................................................... 1
Added Patent Note, Note 1 .............................................................. 1
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 15
7/2006—Rev. C to Rev. D
Added AD8664 ................................................................... Universal
Added 14-Lead SOIC_N and 14-Lead TSSOP ............... Universal
Changes to Features.......................................................................... 1
Changes to Table 1 ............................................................................ 3
Changes to Table 2 ............................................................................ 4
Changes to Table 3 ............................................................................ 5
Changes to Table 4 ............................................................................ 6
Changes to Table 5 and Table 6 ....................................................... 7
Changes to Figure 29 ...................................................................... 11
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 15
5/2006—Rev. B to Rev. C
Changes to Ordering Guide .......................................................... 13
3/2006—Rev. A to Rev. B
Added AD8662 ................................................................... Universal
Added MSOP ...................................................................... Universal
Changes to Table 1.............................................................................3
Changes to Table 2.............................................................................4
Changes to Table 3.............................................................................5
Changes to Table 4.............................................................................6
Changes to Table 5.............................................................................7
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 13
1/2006—Rev. 0 to Rev. A
Added LFCSP_VD ............................................................. Universal
Changes to Table 1.............................................................................3
Changes to Table 2.............................................................................4
Changes to Ordering Guide .......................................................... 13
9/2005—Revision 0: Initial Version
Rev. E | Page 2 of 16
Data Sheet
SPECIFICATIONS
AD8661/AD8662/AD8664
AD8661/AD8662/AD8664
ELECTRICAL CHARACTERISTICS—SOIC, MSOP, AND TSSOP
V
S
= 5.0 V, V
CM
= V
S
/2, T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
AD8661
AD8661
AD8662
AD8664
Input Bias Current
Symbol
V
OS
Test Conditions/Comments
V
CM
= V
S
/2
−40°C < T
A
< +85°C
−40°C < T
A
< +125°C
−40°C < T
A
< +125°C
−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
Offset Voltage Drift
AD8661
AD8662, AD8664
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Short-Circuit Current
Closed-Loop Output Impedance
POWER SUPPLY
Supply Current per Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Peak-to-Peak Noise
Voltage Noise Density
Current Noise Density
CMRR
A
VO
TCV
OS
V
CM
= −0.1 V to +3.0 V
−40°C < T
A
< +125°C
R
L
= 2 kΩ, V
O
= 0.5 V to 4.5 V
−40°C < T
A
< +125°C
−40°C < T
A
< +125°C
V
OH
V
OL
I
SC
Z
OUT
I
SY
I
L
= 1 mA
−40°C < T
A
< +125°C
I
L
= 1 mA
−40°C < T
A
< +125°C
f = 1 MHz, A
V
= 1
V
O
= V
S
/2
−40°C < T
A
< +125°C
R
L
= 2 kΩ
4.85
4.80
−0.1
85
80
100
100
100
220
3
2
4.93
50
±19
50
1.15
1.40
2.0
100
110
10
9
0.2
Min
Typ
30
Max
100
1000
1400
1000
1200
1
50
300
0.5
20
75
+3.0
Unit
µV
µV
µV
µV
µV
pA
pA
pA
pA
pA
pA
V
dB
dB
V/mV
µV/°C
µV/°C
V
V
mV
mV
mA
Ω
mA
mA
V/µs
MHz
Degrees
µV p-p
nV/√Hz
nV/√Hz
pA/√Hz
I
B
0.3
SR
GBP
Φ
O
e
n
p-p
e
n
i
n
3.5
4
65
2.5
12
10
0.1
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
f = 1 kHz
Rev. E | Page 3 of 16
AD8661/AD8662/AD8664
AD8661/AD8662/AD8664
ELECTRICAL CHARACTERISTICS—SOIC, MSOP, AND TSSOP
V
S
= 16.0 V, V
CM
= V
S
/2, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
AD8661
AD8661
AD8662
AD8664
Input Bias Current
Symbol
V
OS
Test Conditions/Comments
V
CM
= V
S
/2
−40°C < T
A
< +85°C
−40°C < T
A
< +125°C
−40°C < T
A
< +125°C
−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
Offset Voltage Drift
AD8661
AD8662, AD8664
OUTPUT CHARACTERISTICS
Output Voltage High
CMRR
A
VO
TCV
OS
V
CM
= −0.1 V to +14.0 V
−40°C < T
A
< +125°C
R
L
= 2 kΩ, V
O
= 0.5 V to 15.5 V
−40°C < T
A
< +125°C
−40°C < T
A
< +125°C
V
OH
I
L
= 1 mA
I
L
= 10 mA
−40°C < T
A
< +125°C
I
L
= 1 mA
I
L
= 10 mA
−40°C < T
A
< +125°C
f = 1 MHz, A
V
= 1
V
S
= 5 V to 16 V
−40°C < T
A
< +125°C
V
O
= V
S
/2
−40°C < T
A
< +125°C
R
L
= 2 kΩ
95
95
15.93
15.60
15.50
−0.1
90
90
200
110
110
360
3
2
15.97
15.70
24
190
±140
45
110
115
1.25
10
9
0.2
Min
Typ
50
Data Sheet
Max
160
1000
1400
1000
1200
1
50
300
0.5
20
75
+14.0
Unit
µV
µV
µV
µV
µV
pA
pA
pA
pA
pA
pA
V
dB
dB
V/mV
µV/°C
µV/°C
V
V
V
mV
mV
mV
mA
Ω
dB
dB
mA
mA
V/µs
MHz
Degrees
µV p-p
nV/√Hz
nV/√Hz
pA/√Hz
I
B
0.3
Output Voltage Low
V
OL
50
300
350
Short-Circuit Current
Closed-Loop Output Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Peak-to-Peak Noise
Voltage Noise Density
Current Noise Density
I
SC
Z
OUT
PSRR
I
SY
1.55
2.1
SR
GBP
Φ
O
e
n
p-p
e
n
i
n
3.5
4
65
2.5
12
10
0.1
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
f = 1 kHz
Rev. E | Page 4 of 16
Data Sheet
AD8661
ELECTRICAL CHARACTERISTICS—LFCSP ONLY
V
S
= 5.0 V, V
CM
= V
S
/2, T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Short-Circuit Current
Closed-Loop Output Impedance
POWER SUPPLY
Supply Current per Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Peak-to-Peak Noise
Voltage Noise Density
Current Noise Density
Symbol
V
OS
I
B
−40°C < T
A
< +85°C
I
OS
−40°C < T
A
< +85°C
CMRR
A
VO
TCV
OS
V
OH
V
OL
I
SC
Z
OUT
I
SY
V
CM
= −0.1 V to +3.0 V
−40°C < T
A
< +85°C
R
L
= 2 kΩ, V
O
= 0.5 V to 4.5 V
−40°C < T
A
< +85°C
I
L
= 1 mA
−40°C < T
A
< +85°C
I
L
= 1 mA
−40°C < T
A
< +85°C
f = 1 MHz, A
V
= 1
V
O
= V
S
/2
−40°C < T
A
< +85°C
R
L
= 2 kΩ
Test Conditions/Comments
V
CM
= V
S
/2
−40°C < T
A
< +85°C
AD8661/AD8662/AD8664
Min
Typ
50
0.3
0.2
Max
300
2000
1
50
0.5
20
+3.0
Unit
µV
µV
pA
pA
pA
pA
V
dB
dB
V/mV
µV/°C
V
V
mV
mV
mA
Ω
mA
mA
V/µs
MHz
Degrees
µV p-p
nV/√Hz
nV/√Hz
pA/√Hz
−0.1
85
80
100
100
100
240
4
4.93
50
±19
65
1.15
17
4.85
4.80
100
120
1.40
1.8
SR
GBP
Φ
O
e
n
p-p
e
n
i
n
3.5
4
65
2.5
12
10
0.1
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
f = 1 kHz
Rev. E | Page 5 of 16
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