Data Sheet
FEATURES
Micropower at high voltage (18 V): 22 μA maximum
Low offset voltage: 350 μV maximum
Low input bias current: 20 pA maximum
Gain bandwidth product: 230 kHz at A
V
= 100 typical
Unity-gain crossover: 230 kHz
−3 dB closed-loop bandwidth: 305 kHz
Single-supply operation: 2.7 V to 18 V
Dual-supply operation: ±1.35 V to ±9 V
Unity-gain stable
Excellent electromagnetic interference immunity
22 μA, RRIO, CMOS,18 V
Operational Amplifiers
AD8657/AD8659
PIN CONNECTION DIAGRAMS
OUT A
1
–IN A
2
+IN A
3
V–
4
8
V+
OUT B
08804-001
AD8657
TOP VIEW
(Not to Scale)
7
6
5
–IN B
+IN B
Figure 1.
AD8657
Pin Configuration, 8-Lead MSOP
OUT A 1
–IN A 2
+IN A 3
V– 4
8 V+
AD8657
TOP VIEW
(Not to Scale)
7 OUT B
6 –IN B
5 +IN B
08804-061
APPLICATIONS
Portable operating systems
Current monitors
4 mA to 20 mA loop drivers
Buffer/level shifting
Multipole filters
Remote/wireless sensors
Low power transimpedance amplifiers
NOTES
1. CONNECT THE EXPOSED PAD TO V– OR
LEAVE IT UNCONNECTED.
Figure 2.
AD8657
Pin Configuration, 8-Lead LFCSP
Note: For
AD8659
pin connections and for more information
about the pin connections for these products, see the Pin
Configurations and Function Descriptions section.
60
50
GENERAL DESCRIPTION
The
AD8657/AD8659
are dual and quad micropower, precision,
rail-to-rail input/output amplifiers optimized for low power and
wide operating supply voltage range applications.
The
AD8657/AD8659
operate from 2.7 V to 18 V with a typical
quiescent supply current of 18 μA. The devices use the Analog
Devices, Inc., patented DigiTrim® trimming technique, which
achieves low offset voltage. The
AD8657/AD8659
also have
high immunity to electromagnetic interference.
The combination of low supply current, low offset voltage, very
low input bias current, wide supply range, and rail-to-rail input
and output make the
AD8657/AD8659
ideal for current
monitoring in process and motor control applications. The
combination of precision specifications makes these devices
ideal for dc gain and buffering of sensor front ends or high
impedance input sources in wireless or remote sensors or
transmitters.
The
AD8657/AD8659
are specified over the extended industrial
temperature range (−40°C to +125°C). The
AD8657
is available in
an 8-lead MSOP package and an 8-lead LFCSP package; the
AD8659
is available in a 14-lead SOIC package and 16-lead
LFCSP package.
I
SY
PER AMP (µA)
V
SY
= 2.7V
V
SY
= 18V
40
30
20
10
–25
0
25
50
TEMPERATURE (°C)
75
100
125
Figure 3.
AD8657,
Supply Current vs. Temperature
Table 1. Precision Micropower Op Amps (<250 μA)
Supply Voltage
Single
5V
AD8538
AD8603
ADA4051-1
AD8539
AD8607
ADA4051-2
AD8609
12 V to 16 V
OP196
36 V
Dual
AD8657
Quad
AD8659
AD8622
ADA4091-2
ADA4096-2
AD8624
ADA4091-4
ADA4096-4
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 ©2011–2017 Analog Devices, Inc. All rights reserved.
08804-023
0
–50
AD8657/AD8659
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Pin Connection Diagrams ............................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—18 V Operation ............................. 3
Electrical Characteristics—10 V Operation ............................. 4
Electrical Characteristics—2.7 V Operation ............................ 5
Absolute Maximum Ratings............................................................ 6
Thermal Resistance ...................................................................... 6
ESD Caution .................................................................................. 6
Pin Configurations and Function Descriptions ........................... 7
Data Sheet
Typical Performance Characteristics ..............................................9
Applications Information .............................................................. 19
Input Stage ................................................................................... 19
Output Stage................................................................................ 20
Rail to Rail ................................................................................... 20
Resistive Load ............................................................................. 20
Comparator Operation—AD8657 ........................................... 21
EMI Rejection Ratio .................................................................. 22
4 mA to 20 mA Process Control Current Loop Transmitter—
AD8657 ........................................................................................ 22
Outline Dimensions ....................................................................... 23
Ordering Guide .......................................................................... 24
REVISION HISTORY
6/2017—Rev. B to Rev. A
Change to 4 mA to 20 mA Process Control Current Loop
Transmitter—AD8657 Section and Figure 78 ............................ 22
Updated Outline Dimensions ....................................................... 24
Changes to Ordering Guide .......................................................... 24
8/2012—Rev. A to Rev. B
Added AD8659 ................................................................... Universal
Changes to Features Section............................................................ 1
Changes to Pin Connection Diagrams Section ............................ 1
Added Figure 3, Renumbered Figures Sequentially..................... 1
Changes to Table 1 ............................................................................ 1
Reordered Table 2 and Table 4 ........................................................ 3
Changes to Table 2 ............................................................................ 3
Changes to Table 3 ............................................................................ 4
Changes to Table 4 ............................................................................ 5
Changes to Table 6 ............................................................................ 6
Added Pin Configurations and Function Descriptions Section 7
Added Figure 4 and Figure 5 ........................................................... 7
Added Table 7, Renumbered Tables Sequentially ........................ 7
Added Figure 6 and Figure 7 ........................................................... 8
Added Table 8.................................................................................... 8
Changes to Figure 10 and Figure 13 ............................................... 9
Changes to Figure 14, Figure 15, Figure 17, and Figure 18 ....... 10
Changes to Figure 28 and Figure 31 ............................................. 12
Changes to Figure 32 ...................................................................... 13
Changes to Figure 39 ...................................................................... 14
Changes to Figure 63 and Figure 66 ............................................. 18
Moved Figure 68 ............................................................................. 19
Change to Inverting Op Amp Configuration Section Heading
and Changes to Figure 70 .............................................................. 20
Change to Noninverting Op Amp Configuration Heading and
Changes to Figure 71...................................................................... 20
Change to Comparator Operation—AD8657 Heading ............ 21
Change to 4 mA to 20 mA Process Control Current Loop
Transmitter—AD8657 Section Heading and Changed
33 μA to 34 μA ................................................................................ 22
Updated Outline Dimensions ....................................................... 24
Added Figure 81 and Figure 82 .................................................... 24
Changes to Ordering Guide .......................................................... 24
3/2011—Rev. 0 to Rev. A
Added LFCSP Package Information ........................... Throughout
Added Figure 2, Renumbered Subsequent Figures
....................
1
Changes to Table 2, Introductory Text; Input Characteristics,
Offset Voltage and Common-Mode Rejection Ratio Test
Conditions/Comments; and Dynamic Performance, Phase
Margin Values ....................................................................................3
Changes to Table 3, Introductory Text; Input Characteristics,
Offset Voltage and Common-Mode Rejection Ratio Test
Conditions/Comments .....................................................................4
Changes to Table 4, Introductory Text; Input Characteristics,
Offset Voltage and Common-Mode Rejection Ratio Test
Conditions/Comments .....................................................................5
Changes to Thermal Resistance Section and Table 5 ...................6
Updated Outline Dimensions ....................................................... 21
Changes to Ordering Guide .......................................................... 21
1/2011—Revision 0: Initial Version
Rev. C | Page 2 of 24
Data Sheet
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—18 V OPERATION
V
SY
= 18 V, V
CM
= V
SY
/2 V, T
A
= 25°C, unless otherwise specified.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
V
OS
Test Conditions/Comments
V
CM
= 0 V to 18 V
V
CM
= 0.3 V to 17.7 V, −40°C ≤ T
A
≤ +85°C
V
CM
= 0.3 V to 17.7 V, −40°C ≤ T
A
≤ +125°C
V
CM
= 0 V to 18 V, −40°C ≤ T
A
≤ +125°C
Min
AD8657/AD8659
Typ
Max
350
1.8
2
16
20
2.9
40
5.8
18
Unit
µV
mV
mV
mV
pA
nA
pA
nA
V
dB
dB
dB
dB
dB
dB
μV/°C
GΩ
pF
pF
V
mV
mA
Ω
dB
dB
µA
µA
V/ms
µs
kHz
Degrees
kHz
kHz
dB
dB
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
I
B
−40°C ≤ T
A
≤ +125°C
I
OS
−40°C ≤ T
A
≤ +125°C
CMRR
V
CM
= 0 V to 18 V
V
CM
= 0.3 V to 17.7 V, −40°C ≤ T
A
≤ +85°C
V
CM
= 0.3 V to 17.7 V, −40°C ≤ T
A
≤ +125°C
V
CM
= 0 V to 18 V, −40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ, V
O
= 0.5 V to 17.5 V
−40°C ≤ T
A
≤ +125°C
0
94
82
80
64
115
105
5
110
Large Signal Voltage Gain
Offset Voltage Drift
Input Resistance
Input Capacitance, Differential Mode
Input Capacitance, Common Mode
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 to 0.1%
Unity-Gain Crossover
Phase Margin
Gain Bandwidth Product
−3 dB Closed-Loop Bandwidth
Channel Separation
EMI Rejection Ratio of +IN x
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
A
VO
ΔV
OS
/ΔT
R
IN
C
INDM
C
INCM
V
OH
V
OL
I
SC
Z
OUT
PSRR
I
SY
120
2
10
11
3.5
R
L
= 100 kΩ to V
CM
, −40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ to V
CM
, −40°C ≤ T
A
≤ +125°C
f = 1 kHz, A
V
= 1
V
SY
= 2.7 V to 18 V
−40°C ≤ T
A
≤ +125°C
I
O
= 0 mA
−40°C ≤ T
A
≤ +125°C
R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
V
IN
= 1 V step, R
L
= 100 kΩ, C
L
= 10 pF
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 100
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
f = 10 kHz, R
L
= 1 MΩ
V
IN
= 100 mV
PEAK
; f = 400 MHz, 900 MHz,
1800 MHz, 2400 MHz
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
f = 1 kHz
17.97
30
±12
15
100
90
115
18
22
34
SR
t
S
UGC
Φ
M
GBP
f
−3 dB
CS
EMIRR
80
15
230
60
230
305
95
90
e
n
p-p
e
n
i
n
5
50
45
0.1
µV p-p
nV/√Hz
nV/√Hz
pA/√Hz
Rev. C | Page 3 of 24
AD8657/AD8659
ELECTRICAL CHARACTERISTICS—10 V OPERATION
V
SY
= 10 V, V
CM
= V
SY
/2 V, T
A
= 25°C, unless otherwise specified.
Table 3.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
V
OS
Test Conditions/Comments
V
CM
= 0 V to 10 V
V
CM
= 0.3 V to 9.7 V, −40°C ≤ T
A
≤ +85°C
V
CM
= 0.3 V to 9.7 V, −40°C ≤ T
A
≤ +125°C
V
CM
= 0 V to 10 V, −40°C ≤ T
A
≤ +125°C
2
−40°C ≤ T
A
≤ +125°C
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
I
OS
−40°C ≤ T
A
≤ +125°C
CMRR
V
CM
= 0 V to 10 V
V
CM
= 0.3 V to 9.7 V, −40°C ≤ T
A
≤ +85°C
V
CM
= 0.3 V to 9.7 V, −40°C ≤ T
A
≤ +125°C
V
CM
= 0 V to 10 V, −40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ, V
O
= 0.5 V to 9.5 V
−40°C ≤ T
A
≤ +125°C
0
88
76
75
59
108
100
105
Min
Typ
Data Sheet
Max
350
1.6
2
16
15
2.6
30
5.2
10
Unit
µV
mV
mV
mV
pA
nA
pA
nA
V
dB
dB
dB
dB
dB
dB
μV/°C
GΩ
pF
pF
V
mV
mA
Ω
dB
dB
µA
µA
V/ms
µs
kHz
Degrees
kHz
kHz
dB
dB
Input Bias Current
I
B
Large Signal Voltage Gain
Offset Voltage Drift
Input Resistance
Input Capacitance, Differential Mode
Input Capacitance, Common Mode
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 to 0.1%
Unity-Gain Crossover
Phase Margin
Gain Bandwidth Product
−3 dB Closed-Loop Bandwidth
Channel Separation
EMI Rejection Ratio of +IN x
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
A
VO
ΔV
OS
/ΔT
R
IN
C
INDM
C
INCM
V
OH
V
OL
I
SC
Z
OUT
PSRR
I
SY
120
2
10
11
3.5
R
L
= 100 kΩ to V
CM
, −40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ to V
CM
, −40°C ≤ T
A
≤ +125°C
f = 1 kHz, A
V
= 1
V
SY
= 2.7 V to 18 V
−40°C ≤ T
A
≤ +125°C
I
O
= 0 mA
−40°C ≤ T
A
≤ +125°C
R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
V
IN
= 1 V step, R
L
= 100 kΩ, C
L
= 10 pF
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 100
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
f = 10 kHz, R
L
= 1 MΩ
V
IN
= 100 mV
PEAK
; f = 400 MHz, 900 MHz,
1800 MHz, 2400 MHz
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
f = 1 kHz
9.98
20
±11
15
100
90
115
18
22
34
SR
t
s
UGC
Φ
M
GBP
f
−3 dB
CS
EMIRR
75
15
225
60
230
300
95
90
e
n
p-p
e
n
i
n
5
50
45
0.1
µV p-p
nV/√Hz
nV/√Hz
pA/√Hz
Rev. C | Page 4 of 24
Data Sheet
ELECTRICAL CHARACTERISTICS—2.7 V OPERATION
V
SY
= 2.7 V, V
CM
= V
SY
/2 V, T
A
= 25°C, unless otherwise specified.
Table 4.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
V
OS
Test Conditions/Comments
V
CM
= 0 V to 2.7 V
V
CM
= 0.3 V to 2.4 V, −40°C ≤ T
A
≤ +85°C
V
CM
= 0.3 V to 2.4 V, −40°C ≤ T
A
≤ +125°C
V
CM
= 0 V to 2.7 V, −40°C ≤ T
A
≤ +125°C
1
−40°C ≤ T
A
≤ +125°C
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
I
OS
−40°C ≤ T
A
≤ +125°C
CMRR
V
CM
= 0 V to 2.7 V
V
CM
= 0.3 V to 2.4 V, −40°C ≤ T
A
≤ +85°C
V
CM
= 0.3 V to 2.4 V, −40°C ≤ T
A
≤ +125°C
V
CM
= 0 V to 2.7 V, −40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ, V
O
= 0.5 V to 2.2 V
−40°C ≤ T
A
≤ +125°C
0
77
69
62
47
95
90
Min
AD8657/AD8659
Typ
Max
350
1.2
2.5
16
10
2.6
20
5.2
2.7
Unit
µV
mV
mV
mV
pA
nA
pA
nA
V
dB
dB
dB
dB
dB
dB
μV/°C
GΩ
pF
pF
V
mV
mA
Ω
dB
dB
µA
µA
V/ms
µs
kHz
Degrees
kHz
kHz
dB
dB
Input Bias Current
I
B
95
Large Signal Voltage Gain
Offset Voltage Drift
Input Resistance
Input Capacitance, Differential Mode
Input Capacitance, Common Mode
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 to 0.1%
Unity-Gain Crossover
Phase Margin
Gain Bandwidth Product
−3 dB Closed-Loop Bandwidth
Channel Separation
EMI Rejection Ratio of +IN x
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
A
VO
ΔV
OS
/ΔT
R
IN
C
INDM
C
INCM
V
OH
V
OL
I
SC
Z
OUT
PSRR
I
SY
105
2
10
11
3.5
R
L
= 100 kΩ to V
CM
, −40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ to V
CM
, −40°C ≤ T
A
≤ +125°C
f = 1 kHz, A
V
= 1
V
SY
= 2.7 V to 18 V
−40°C ≤ T
A
≤ +125°C
I
O
= 0 mA
−40°C ≤ T
A
≤ +125°C
R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
V
IN
= 1 V step, R
L
= 100 kΩ, C
L
= 10 pF
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 100
V
IN
= 10 mV p-p, R
L
= 1 MΩ, C
L
= 10 pF, A
V
= 1
f = 10 kHz, R
L
= 1 MΩ
V
IN
= 100 mV
PEAK
; f = 400 MHz, 900 MHz,
1800 MHz, 2400 MHz
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
f = 1 kHz
2.69
10
±4
20
100
90
115
18
22
34
SR
t
s
UGC
Φ
M
GBP
f
−3 dB
CS
EMIRR
50
20
190
55
200
245
95
90
e
n
p-p
e
n
i
n
6
60
56
0.1
µV p-p
nV/√Hz
nV/√Hz
pA/√Hz
Rev. C | Page 5 of 24
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