Ultraprecision, 36 V, 2.8 nV/√Hz
Dual Rail-to-Rail Output Op Amp
AD8676
APPLICATIONS
Precision instrumentation
PLL filters
Laser diode control loops
Strain gage amplifiers
Medical instrumentation
Thermocouple amplifiers
OUT A
1
–IN A
2
+IN A
3
V–
4
AD8676
8
V+
7
OUT B
6 –IN B
TOP VIEW
(Not to Scale)
5 +IN B
06487-001
Very low voltage noise: 2.8 nV/√Hz @ 1 kHz
Rail-to-rail output swing
Low input bias current: 2 nA maximum
Very low offset voltage: 12 μV typical
Low input offset drift: 0.6 μV/°C maximum
Very high gain: 120 dB
Wide bandwidth: 10 MHz typical
±5 V to ±18 V operation
PIN CONFIGURATIONS
Figure 1. 8-Lead SOIC_N (R-8)
OUT A
1
8
V+
–IN A
2
AD8676
7
OUT B
+IN A
3
6
–IN B
V–
4
TOP VIEW
(Not to Scale)
5
+IN B
06487-002
FEATURES
Figure 2. 8-Lead MSOP (RM-8)
GENERAL DESCRIPTION
The AD8676 precision operational amplifier offers ultralow
offset, drift, and voltage noise combined with very low input
bias currents over the full operating temperature range. The
AD8676 is a precision, wide bandwidth op amp featuring railto-rail output swings and very low noise. Operation is fully
specified from ±5 V to ±15 V.
The AD8676 features a rail-to-rail output like that of the OP184,
but with wide bandwidth and even lower voltage noise, combined with the precision and low power consumption like that
of the industry-standard OP07 amplifier. Unlike other low
noise, rail-to-rail op amps, the AD8676 has very low input bias
current and low input current noise.
With typical offset voltage of only 12 μV, offset drift of 0.2 μV/°C,
and noise of only 0.10 μV p-p (0.1 Hz to 10 Hz), the AD8676 is
perfectly suited for applications where large error sources
cannot be tolerated. Precision instrumentation, PLL and other
precision filter circuits, position and pressure sensors, medical
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.
instrumentation, and strain gage amplifiers benefit greatly from
the very low noise, low input bias current, and wide bandwidth.
Many systems can take advantage of the low noise, dc precision,
and rail-to-rail output swing provided by the AD8676 to maximize SNR and dynamic range.
The smaller packages and low power consumption afforded by
the AD8676 allow maximum channel density or minimum
board size for space-critical equipment.
The AD8676 is specified for the extended industrial temperature
range (−40°C to +125°C). The AD8676 is available in the 8-lead
MSOP, and the popular 8-lead, narrow SOIC; both of which are
lead-free packages. MSOP packaged devices are only available
in tape and reel format.
For the single version of this ultraprecision, rail-to-rail op amp,
see the AD8675 data sheet.
©2006–2008 Analog Devices, Inc. All rights reserved.
AD8676
SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
VS = ±5.0 V, VCM = 0 V, VO = 0 V, TA = +25°C, unless otherwise specified.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
B Grade (SOIC)
B Grade (MSOP)
A Grade (SOIC, MSOP)
Offset Voltage
B Grade (SOIC, MSOP)
A Grade (SOIC, MSOP)
Input Bias Current
Symbol
Conditions
VOS
IOS
−40°C ≤ TA ≤ +125°C
CMRR
Open-Loop Gain
AVO
Output Voltage Low
Short-Circuit Limit
Output Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
Max
Unit
12
50
60
100
μV
μV
μV
15
160
250
+2
+5.5
+1
+2.8
+3.0
μV
μV
nA
nA
nA
nA
V
dB
dB
dB
−40°C ≤ TA ≤ +125°C
IB
Input Voltage Range
Common-Mode Rejection Ratio
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Typ
VOS
−40°C ≤ TA ≤ +125°C
Input Offset Current
Min
ΔVOS/ΔT
VOH
VOL
VCM = −3.0 V to +3.0 V
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to ground,
VO = −3.5 V to +3.5 V
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ to ground
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to ground
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ to ground
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to ground
−40°C ≤ TA ≤ +125°C
−2
−5.5
−1
−2.8
−3.0
105
105
120
ISY
126
117
0.2
+4.90
+4.85
+4.80
+4.75
0.6
+4.95
+4.89
−4.98
−4.91
ISC
IO
PSRR
130
−4.90
−4.85
−4.86
−4.82
+40
±20
VS = ±5.0 V to ±15.0 V
−40°C ≤ TA ≤ +125°C
VO = 0 V
−40°C ≤ TA ≤ +125°C
106
106
120
120
2.5
3.2
3.8
dB
μV/°C
V
V
V
V
V
V
V
V
mA
mA
dB
dB
mA
mA
SR
GBP
RL = 2 kΩ
2.5
10
V/μs
MHz
en p-p
en
in
0.1 Hz to 10 Hz
f = 1 kHz
f = 10 Hz
0.1
2.8
0.3
μV p-p
nV/√Hz
pA/√Hz
Rev. A | Page 3 of 12
AD8676
VS = ±15 V, VCM = 0 V, VO = 0 V, TA = +25°C, unless otherwise specified.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
B Grade (SOIC)
B Grade (MSOP)
A Grade (SOIC, MSOP)
Offset Voltage
B Grade (SOIC, MSOP)
A Grade (SOIC, MSOP)
Input Bias Current
Symbol
Conditions
VOS
IOS
−40°C ≤ TA ≤ +125°C
CMRR
Open-Loop Gain
AVO
Output Voltage Low
Short-Circuit Limit
Output Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
Max
Unit
12
50
60
100
μV
μV
μV
15
160
250
+2
+4.5
+1
+2.8
+12.5
μV
μV
nA
nA
nA
nA
V
dB
dB
dB
−40°C ≤ TA ≤ +125°C
IB
Input Voltage Range
Common-Mode Rejection Ratio
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Typ
VOS
−40°C ≤ TA ≤ +125°C
Input Offset Current
Min
ΔVOS/ΔT
VOH
VOL
VCM = −12.5 V to +12.5 V
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to ground,
VO = −13.5 V to +13.5 V
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ to ground
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to ground
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ to ground
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to ground
−40°C ≤ TA ≤ +125°C
−2
−4.5
−1
−2.8
−12.5
111
107
123
117
0.2
+14.85
+14.80
+14.60
+14.40
ISY
0.6
+14.92
+14.75
−14.96
−14.85
ISC
IO
PSRR
130
130
132
−14.94
−14.90
−14.75
−14.60
+40
±20
VS = ±5.0 V to ±15.0 V
−40°C ≤ TA ≤ +125°C
VO = 0 V
−40°C ≤ TA ≤ +125°C
106
106
120
2.7
3.4
4.2
dB
μV/°C
V
V
V
V
V
V
V
V
mA
mA
dB
dB
mA
mA
SR
GBP
RL =10 kΩ
2.5
10
V/μs
MHz
en p-p
en
in
0.1 Hz to 10 Hz
f = 1 kHz
f = 10 Hz
0.1
2.8
0.3
μV p-p
nV/√Hz
pA/√Hz
Rev. A | Page 4 of 12
AD8676
ABSOLUTE MAXIMUM RATINGS
THERMAL RESISTANCE
Table 3.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
Output Short-Circuit Duration to GND
Storage Temperature Range
RM, R Packages
Operating Temperature Range
Junction Temperature Range
RM, R Packages
Lead Temperature Range (Soldering, 10 sec)
Rating
±18 V
±V supply
±0.7 V
Indefinite
Table 4. Thermal Resistance
−65°C to +150°C
−40°C to +125°C
POWER SEQUENCING
Package Type
8-Lead MSOP (RM)
8-Lead SOIC_N (R)
−65°C to +150°C
300°C
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.
θJA
210
158
θJC
45
43
Unit
°C/W
°C/W
The op amp supplies must be established simultaneously with,
or before, any input signals are applied. If this is not possible,
the input current must be limited to 10 mA.
ESD CAUTION
Rev. A | Page 5 of 12
AD8676
OUTLINE DIMENSIONS
5.00 (0.1968)
4.80 (0.1890)
8
1
5
6.20 (0.2440)
5.80 (0.2284)
4
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0040)
COPLANARITY
0.10
SEATING
PLANE
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
0.50 (0.0196)
0.25 (0.0099)
1
5.15
4.90
4.65
5
4
45°
PIN 1
8°
0°
0.25 (0.0098)
0.17 (0.0067)
8
3.20
3.00
2.80
0.65 BSC
0.95
0.85
0.75
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-A A
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.
1.10 MAX
0.15
0.00
060506-A
4.00 (0.1574)
3.80 (0.1497)
3.20
3.00
2.80
0.38
0.22
COPLANARITY
0.10
0.23
0.08
0.80
0.60
0.40
8°
0°
SEATING
PLANE
COMPLIANT TO JEDEC STANDARDS MO-187-AA
Figure 29. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body (R-8)
Dimensions shown in millimeters and (inches)
Figure 30. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
ORDERING GUIDE
Model
AD8676ARMZ-R2 1
AD8676ARMZ-REEL1
AD8676ARZ1
AD8676ARZ-REEL1
AD8676ARZ-REEL71
AD8676BRMZ-R21
AD8676BRMZ-REEL1
AD8676BRZ1
AD8676BRZ-REEL1
AD8676BRZ-REEL71
1
Temperature Range
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
Package Description
8-Lead Mini Small Outline Package [MSOP]
8-Lead Mini Small Outline Package [MSOP]
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Mini Small Outline Package [MSOP]
8-Lead Mini Small Outline Package [MSOP]
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Standard Small Outline Package [SOIC_N]
Z = RoHs Compliant Part.
Rev. A | Page 11 of 12
Package Option
RM-8
RM-8
R-8
R-8
R-8
RM-8
RM-8
R-8
R-8
R-8
Branding
A13
A13
A1L
A1L