Precision, Very Low Noise,
Low Input Bias Current Op Amp
AD8672-EP
Enhanced Product
PIN CONFIGURATION
Voltage noise density: 2.8 nV/√Hz typical
Peak-to-peak noise: 77 nV p-p typical
Gain bandwidth product: 10 MHz
Low input bias current: 14 nA maximum
Low offset voltage: 75 μV maximum
High open-loop gain: 1000 V/mV (120 dB)
Low supply current per amplifier: 3 mA typical
Dual-supply operation: ±5 V to ±15 V
Unity-gain stable
No phase reversal
ENHANCED PRODUCT FEATURES
Supports defense and aerospace applications (AQEC standard)
Extended temperature range: −55°C to +125°C
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Enhanced product change notification
Qualification data available on request
APPLICATIONS
8
V+
–IN A 2
AD8672-EP
7
OUT B
+IN A 3
TOP VIEW
(Not to Scale)
6
–IN B
5
+IN B
V– 4
Figure 1.
GENERAL DESCRIPTION
The AD8672-EP is a very high precision amplifier featuring very
low noise, very low offset voltage and drift, low input bias current,
10 MHz bandwidth, and low power consumption. Outputs are
stable with capacitive loads of over 1000 pF. Supply current is less
than 3 mA per amplifier at 30 V.
The combination of ultralow noise, high precision, speed, and
stability within the AD8672-EP is unmatched. Applications for
this amplifier include high quality PLL filters, precision filters,
medical and analytical instrumentation, precision power supply
controls, ATE, data acquisition, and precision controls, as well
as professional quality audio.
The AD8672-EP is available in an 8-lead SOIC narrow package.
It is specified over a −55°C to +125°C temperature range.
Phase-locked loop (PLL) filters
Filters for GPS
Instrumentation
Sensors and controls
Professional quality audio
Rev. 0
OUT A 1
13063-001
FEATURES
Additional application and technical information can be found
in the AD8672 data sheet.
Document Feedback
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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
©2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
AD8672-EP
Enhanced Product
TABLE OF CONTENTS
Features .............................................................................................. 1 Electrical Characteristics, ±15 V .................................................4 Enhanced Product Features ............................................................ 1 Absolute Maximum Ratings ............................................................5 Applications ....................................................................................... 1 Thermal Resistance .......................................................................5 Pin Configuration ............................................................................. 1 ESD Caution...................................................................................5 General Description ......................................................................... 1 Typical Performance Charateristics ................................................6 Revision History ............................................................................... 2 Outline Dimensions ..........................................................................8 Specifications..................................................................................... 3 Ordering Guide .............................................................................8 Electrical Characteristics, ±5 V .................................................. 3 REVISION HISTORY
9/15—Revision 0: Initial Version
Rev. 0 | Page 2 of 8
Enhanced Product
AD8672-EP
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS, ±5 V
VSY = ±5.0 V, VCM = 0 V, TA = 25°C, unless otherwise specified.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Offset Voltage Drift
Input Bias Current
Symbol
Test Conditions/Comments
Typ
Max
Unit
20
30
0.3
+3
+5
+8
+6
+6
+8
75
125
0.8
+14
+20
+60
+14
+20
+60
+2.5
120
6000
μV
μV
μV/°C
nA
nA
nA
nA
nA
nA
V
dB
V/mV
CINCM
CINDM
6.25
7.5
pF
pF
RIN
RINDM
3.5
15
GΩ
MΩ
+4.0
+3.9
−3.9
−3.8
±10
V
V
V
V
mA
VOS
∆VOS/∆T
IB
−55°C < TA < +125°C
−55°C < TA < +125°C
25°C < TA < 125°C
−55°C < TA < +125°C
Input Offset Current
IOS
25°C < TA < 125°C
−55°C < TA < +125°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Input Capacitance
Common Mode
Differential Mode
Input Resistance
Common Mode
Differential Mode
OUTPUT CHARACTERISTICS
Output Voltage
High
Low
Min
CMRR
AVO
VOH
VOL
VCM = −2.5 V to +2.5 V
RL = 2 kΩ, VO = −3 V to +3 V
−14
−20
−60
−14
−20
−60
−2.5
100
1000
RL = 2 kΩ, −55°C to +125°C
RL = 600 Ω
RL = 2 kΩ, −55°C to +125°C
RL = 600 Ω
+3.8
+3.7
110
Output Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
PSRR
ISY
VS = ±4 V to ±18 V
VO = 0 V
−55°C < TA < +125°C
DYNAMIC PERFORMANCE
Slew Rate
Settling Time
SR
tS
RL = 2 kΩ
To 0.1% (4 V step, G = 1)
To 0.01% (4 V step, G = 1)
4
1.4
5.1
10
0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
f = 1 kHz
f = 10 kHz
77
2.8
0.3
−130
−105
Gain Bandwidth Product
NOISE PERFORMANCE
Peak-to-Peak Noise
Voltage Noise Density
Current Noise Density
Channel Separation
IOUT
GBP
en p-p
en
in
CS
Rev. 0 | Page 3 of 8
130
3
−3.8
−3.7
3.5
4.2
dB
mA
mA
V/μs
μs
μs
MHz
100
3.8
nV p-p
nV/√Hz
pA/√Hz
dB
dB
AD8672-EP
Enhanced Product
ELECTRICAL CHARACTERISTICS, ±15 V
VS = ±15.0 V, VCM = 0 V, TA = 25°C, unless otherwise specified.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Offset Voltage Drift
Input Bias Current
Symbol
Test Conditions/Comments
Typ
Max
Unit
20
30
0.3
+3
+5
+8
+6
+6
+8
75
125
0.8
+14
+20
+60
+14
+20
+60
+12
120
6000
μV
μV
μV/°C
nA
nA
nA
nA
nA
nA
V
dB
V/mV
CINCM
CINDM
6.25
7.5
pF
pF
RIN
RINDM
3.5
15
GΩ
MΩ
13.8
12.3
−13.8
−12.4
±20
±30
V
V
V
V
mA
mA
VOS
∆VOS/∆T
IB
−55°C < TA < +125°C
−55°C < TA < +125°C
25°C < TA < 125°C
−55°C < TA < +125°C
Input Offset Current
IOS
25°C < TA < 125°C
−55°C < TA < +125°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Input Capacitance
Common Mode
Differential Mode
Input Resistance
Common Mode
Differential Mode
OUTPUT CHARACTERISTICS
Output Voltage
High
Low
Min
CMRR
AVO
VOH
VOL
VCM = −12 V to +12 V
RL = 2 kΩ, VO = −10 V to +10 V
−14
−20
−60
−14
−20
−60
−12
100
1000
RL = 2 kΩ, −55°C to +125°C
RL = 600 Ω
RL = 2 kΩ, −55°C to +125°C
RL = 600 Ω
13.2
11
110
Output Current
Short Circuit Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
PSRR
ISY
VS = ±4 V to ±18 V
VO = 0 V
−55°C < TA < +125°C
DYNAMIC PERFORMANCE
Slew Rate
Settling Time
SR
tS
RL = 2 kΩ
To 0.1% (10 V step, G = 1)
To 0.01% (10 V step, G = 1)
4
2.2
6.3
10
0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
f = 1 kHz
f = 10 kHz
77
2.8
0.3
−130
−105
Gain Bandwidth Product
NOISE PERFORMANCE
Peak-to-Peak Noise
Voltage Noise Density
Current Noise Density
Channel Separation
IOUT
ISC
GBP
en p-p
en
in
CS
Rev. 0 | Page 4 of 8
130
3
−13.2
−11
3.5
4.2
dB
mA
mA
V/μs
μs
μs
MHz
100
3.8
nV p-p
nV/√Hz
pA/√Hz
dB
dB
Enhanced Product
AD8672-EP
ABSOLUTE MAXIMUM RATINGS
THERMAL RESISTANCE
Table 3.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
Output Short-Circuit Duration
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature Range (Soldering, 60 sec)
Rating
36 V
VS− to VS+
±0.7 V
Indefinite
−65°C to +150°C
−55°C to +125°C
−65°C to +150°C
300°C
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
θJA is specified for the worst-case conditions, that is, θJA is
specified for the device soldered on a 4-layer circuit board for
surface-mount packages.
Table 4.
Package Type
8-Lead SOIC_N (R-8)
ESD CAUTION
Rev. 0 | Page 5 of 8
θJA
120
θJC
43
Unit
°C/W
AD8672-EP
Enhanced Product
4.0
135
3.5
134
VS = ±2.5V TO ±18V
VS = ±15V
133
3.0
VS = ±5V
132
PSRR (dB)
2.0
131
1.5
130
1.0
129
0.5
128
–50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
127
–75
–50
0
25
50
VS = ±5V
TA = –55°C TO +125°C
80
60
40
40
MEAN + 3σ
MEAN
–20
–40
MEAN – 3σ
MEAN – 3σ
–60
–60
–80
–80
–25
0
25
50
75
100
125
TEMPERATURE (°C)
–100
–75
13063-102
–50
MEAN
0
–20
–100
–75
MEAN + 3σ
20
VOS (µV)
20
–40
125
VS = ±15V
TA = –55°C TO +125°C
80
60
0
100
Figure 5. PSRR vs. Temperature
100
100
75
TEMPERATURE (°C)
Figure 2. Supply Current vs. Temperature
VOS (µV)
–25
–50
–25
0
25
50
100
125
Figure 6. Input Offset Voltage (VOS) vs. Temperature, VS = ±15 V
Figure 3. Input Offset Voltage (VOS) vs. Temperature, VS = ±5 V
16
25
75
TEMPERATURE (°C)
13063-105
0
–75
13063-104
2.5
13063-101
SUPPLY CURRENT (mA)
TYPICAL PERFORMANCE CHARATERISTICS
VS = ±5V
TA = –55°C TO +125°C
VS = ±15V
TA = –55°C TO +125°C
14
NUMBER OF AMPLIFIERS
15
10
12
10
8
6
4
5
TCVOS (µV/°C)
TCVOS (µV/°C)
Figure 7. Input Offset Voltage Drift (TCVOS) Distribution, VS = ±15 V
Figure 4. Input Offset Voltage Drift (TCVOS) Distribution, VS = ±5 V
Rev. 0 | Page 6 of 8
13063-106
0
13063-103
0
–0.50
–0.45
–0.40
–0.35
–0.30
–0.25
–0.20
–0.15
–0.10
–0.05
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
2
–0.50
–0.45
–0.40
–0.35
–0.30
–0.25
–0.20
–0.15
–0.10
–0.05
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
NUMBER OF AMPLIFIERS
20
Enhanced Product
AD8672-EP
4.0
3.5
VS = ±15V
VS = ±5V
3.5
3.0
–IB
3.0
2.5
IB (nA)
IB (nA)
2.5
2.0
+IB
1.5
–IB
2.0
1.5
+IB
1.0
1.0
0.5
–50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
0
–75
13063-107
0
–75
–25
0
25
50
75
100
125
TEMPERATURE (°C)
Figure 8. Input Bias Current (IB) vs. Temperature, VS = ±5 V
14.5
–50
13063-110
0.5
Figure 11. Input Bias Current (IB) vs. Temperature, VS = ±15 V
–11.0
RL = 2kΩ
VS = ±15V
14.0
–11.5
OUTPUT VOLTAGE (V)
13.0
12.5
RL = 600Ω
12.0
11.5
–12.0
–12.5
RL = 600Ω
–13.0
–13.5
RL = 2kΩ
11.0
–14.0
10.5
VS = ±15V
–50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
–14.5
–75
13063-108
10.0
–75
25000
VS = ±5V
15000
10000
VS = ±15V
5000
0
25
50
75
100
TEMPERATURE (°C)
125
13063-109
AVO (V/mV)
20000
–25
0
25
50
75
100
Figure 12. Output Voltage Low vs. Temperature
30000
–50
–25
TEMPERATURE (°C)
Figure 9. Output Voltage High vs. Temperature
0
–75
–50
Figure 10. Open-Loop Gain (AVO) vs. Temperature
Rev. 0 | Page 7 of 8
125
13063-111
OUTPUT VOLTAGE (V)
13.5
AD8672-EP
Enhanced Product
OUTLINE DIMENSIONS
5.00 (0.1968)
4.80 (0.1890)
8
1
5
6.20 (0.2441)
5.80 (0.2284)
4
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0040)
COPLANARITY
0.10
SEATING
PLANE
0.50 (0.0196)
0.25 (0.0099)
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
45°
8°
0°
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-AA
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
012407-A
4.00 (0.1574)
3.80 (0.1497)
Figure 13. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body (R-8)
Dimensions shown in millimeters and (inches)
ORDERING GUIDE
Model1
AD8672TRZ-EP
AD8672TRZ-EP-R7
1
Temperature Range
−55°C to +125°C
−55°C to +125°C
Package Description
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Standard Small Outline Package [SOIC_N]
Z = RoHS Compliant Part.
©2015 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D13063-0-9/15(0)
Rev. 0 | Page 8 of 8
Package Option
R-8
R-8