AD AD8676ARZ-REEL Ultra precision, 36 v, 2.8 nv/â hz dual rail-to-rail output op amp Datasheet

Ultra Precision, 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
PIN CONFIGURATIONS
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
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 rail-torail 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
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.
Rev. 0
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
©2006 Analog Devices, Inc. All rights reserved.
AD8676
TABLE OF CONTENTS
Features .............................................................................................. 1
Absolute Maximum Ratings ............................................................5
Applications....................................................................................... 1
Thermal Resistance .......................................................................5
Pin Configurations ........................................................................... 1
Power Sequencing .........................................................................5
General Description ......................................................................... 1
ESD Caution...................................................................................5
Revision History ............................................................................... 2
Typical Performance Characteristics ..............................................6
Specifications..................................................................................... 3
Outline Dimensions ....................................................................... 10
Electrical Specifications............................................................... 3
Ordering Guide .......................................................................... 10
REVISION HISTORY
10/06—Revision 0: Initial Version
Rev. 0 | Page 2 of 12
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
ΔVOS/ΔT
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
VOH
RL = 2 kΩ to ground
−40°C ≤ TA ≤ +125°C
Output Voltage Low
VOL
RL = 2 kΩ to ground
−40°C ≤ TA ≤ +125°C
Short-Circuit Limit
Output Current
ISC
IO
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
+3.5
μV
μV
nA
nA
nA
nA
V
dB
dB
V/mV
−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
PSRR
ISY
VS = ±5.0 V to ±15.0 V
−40°C ≤ TA ≤ +125°C
VO = 0 V
−40°C ≤ TA ≤ +125°C
−2
−5.5
−1
−2.8
−3.5
105
105
1000
+0.5
+1
+0.1
+0.1
700
1250
0.2
+4.84
+4.78
130
130
2000
+4.86
+4.82
−4.95
−4.93
106
106
0.6
V/mV
μV/°C
V
V
−4.86
−4.82
V
V
+40
±20
mA
mA
120
120
2.3
2.7
dB
dB
mA
mA
2.7
3.4
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. 0 | 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
ΔVOS/ΔT
VOH
Output Voltage Low
VOL
Short-Circuit Limit
Output Current
ISC
IO
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
+13.5
μV
μV
nA
nA
nA
nA
V
dB
dB
V/mV
−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
PSRR
ISY
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 = 2 kΩ to ground
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to ground
−40°C ≤ TA ≤ +125°C
VS = ±5.0 V to ±15.0 V
−40°C ≤ TA ≤ +125°C
VO = 0 V
−40°C ≤ TA ≤ +125°C
−2
−4.5
−1
−2.8
−13.5
111
107
1500
−0.5
−1
−0.1
−0.1
700
1700
0.2
+14.65
+14.49
106
106
130
130
4000
+14.7
+14.59
−14.88
−14.83
0.6
V/mV
μV/°C
−14.75
−14.69
V
V
V
V
+40
±20
mA
mA
120
120
2.5
2.9
dB
dB
mA
mA
2.9
3.8
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. 0 | 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 − 1.5 V
±0.7 V
Indefinite
Table 4. Thermal Resistance
−65°C to +150°C
−40°C to +125°C
POWER SEQUENCING
−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.
Package Type
8-Lead MSOP (RM)
8-Lead SOIC_N (R)
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. 0 | Page 5 of 12
AD8676
TYPICAL PERFORMANCE CHARACTERISTICS
±15 V and ±5 V, TA = 25°C, unless otherwise specified.
10
150
100
8
7
50
6
VOS (µV)
VOLTAGE NOISE DENSITY (nV/ Hz)
9
5
4
0
–50
3
2
–100
1
10
100
1k
10k
100k
FREQUENCY (Hz)
–150
–45 –30 –15
0
15
30
45
60
75
90
105 120 135
TEMPERATURE (°C)
Figure 3. Voltage Noise Density vs. Frequency
06487-006
0
06487-003
1
Figure 6. Offset Voltage vs. Temperature
90
120
TA = 25°C
80
NUMBER OF AMPLIFIERS
NUMBER OF AMPLIFIERS
100
70
60
50
40
30
20
80
60
40
20
–60
–40
–20
0
20
40
60
80
100
VOS (µV)
0
06487-004
0
–100 –80
–0.65
–0.55
–0.45
–0.35
–0.25
–0.15
–0.05
0.05
IB (nA)
Figure 4. Input Offset Voltage Distribution
06487-007
10
Figure 7. Input Bias Current, VSY = ±15 V
25
160
140
NUMBER OF AMPLIFIERS
15
10
5
120
100
80
60
40
0
06487-005
TCVOS (µV/°C)
0.75
0.80
0.85
0.90
0.95
1.00
0.50
0.55
0.60
0.65
0.70
0.40
0.45
0
–0.65 –0.60 –0.55 –0.50 –0.45 –0.40 –0.35 –0.30 –0.25 –0.20 –0.15
IB (nA)
Figure 8. Input Bias Current, VSY = ±5 V
Figure 5. TCVOS Distribution
Rev. 0 | Page 6 of 12
06487-008
20
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
NUMBER OF AMPLIFIERS
20
AD8676
120
4
100
180
RL = 2kΩ
CL = 35pF
θM = 55.2
GAIN
80
3
120
60
2
0
VSY = ±15V
–1
60
20
GAIN (dB)
VSY = ±5V
1
0
0
–20
–60
–40
–2
–60
–3
–120
–80
–4
–100
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
–120
100
06487-009
–5
–40
1k
10k
100k
1M
10M
–180
100M
06487-012
IB (nA)
PHASE
40
PHASE MARGIN (Degrees)
5
FREQUENCY (Hz)
Figure 9. Input Bias Current vs. Temperature
Figure 12. Gain and Phase vs. Frequency
3.0
60
50
40
CLOSED-LOOP GAIN (dB)
SUPPLY CURRENT (mA)
2.5
2.0
1.5
1.0
G = 100
30
20
G = 10
10
0
G=1
–10
–20
0.5
15
20
25
30
35
SUPPLY VOLTAGE (V)
–40
1k
10k
100k
1M
10M
100M
06487-013
10
06487-010
5
100M
06487-014
–30
0
FREQUENCY (Hz)
Figure 10. Supply Current vs. Total Supply Voltage
Figure 13. Closed-Loop Gain vs. Frequency
3.5
70
60
3.0
50
2.5
ZOUT (Ω)
VS = ±5V
2.0
1.5
AVO = 100
40
30
1.0
20
0.5
10
AVO = 10
AVO = 1
0
–40
–20
0
20
40
60
80
100
TEMPERATURE (°C)
120
0
1k
06487-011
SUPPLY CURRENT (mA)
VS = ±15V
10k
100k
1M
FREQUENCY (Hz)
Figure 11. Supply Current vs. Temperature
Figure 14. ZOUT vs. Frequency
Rev. 0 | Page 7 of 12
10M
AD8676
0.1
0
–5
–0.1
30
–0.2
20
–0.3
10
0
–0.4
VOUT
–0.5
–10
–10
–0.6
–0.7
–4
06487-015
–15
TIME (10µs/DIV)
1
21
0.3
50
VIN = 200mV p-p
AVO = –100
40
RL = 10kΩ
0.2
2
INPUT VOLTAGE (V)
0.1
1
0
–1
30
VIN
0
20
–0.1
10
–0.2
0
VOUT
–2
–0.3
–10
–3
–0.4
–20
–4
–0.5
–4
06487-016
VOLTAGE (V)
16
Figure 18. Positive Overvoltage Recovery
VIN = ±3.5V
RL = 2kΩ
AV = +1
3
11
TIME (µs)
Figure 15. Large Signal Transient Response, VSY = ±15 V
4
6
VIN = 200mV p-p
–20
AVO = –100
RL = 10kΩ
–30
26
31
36
TIME (10µs/DIV)
1
6
11
16
21
26
31
OUTPUT VOLTAGE (V)
VOLTAGE (V)
5
40
OUTPUT VOLTAGE (V)
0
INPUT VOLTAGE (V)
10
50
VIN
06487-018
VIN = ±10V
RL = 2kΩ
AV = +1
–30
36
06487-019
15
TIME (µs)
Figure 16. Large Signal Transient Response, VSY = ±5 V
Figure 19. Negative Overvoltage Recovery
70
180
AV = +1
VIN = 100mV p-p
60
160
140
CMRR (dB)
120
40
+OS
30
100
80
60
–OS
40
20
20
10
1
10
100
1k
10k
100k
CAPACITANCE (pF)
Figure 17. Small Signal Overshoot vs. Load Capacitance
–20
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
Figure 20. CMRR vs. Frequency
Rev. 0 | Page 8 of 12
10M
100M
06487-020
0
0
06487-017
OVERSHOOT (%)
50
AD8676
160
1000
POWER SUPPLY REJECTION RATIO (dB)
TA = 25°C
140
120
SOURCE
100
VS – VOUT (mV)
–PSRR
80
60
+PSRR
40
100
10
SINK
20
100
1k
10k
100k
1M
10M
1
0.001
06487-021
–20
10
100M
FREQUENCY (Hz)
0.1
1
10
100
LOAD CURRENT (mA)
Figure 21. Power Supply Rejection Ratio vs. Frequency
Figure 24. Output Saturation Voltage vs. Output Load Current
148
14.86
147
14.84
146
14.82
145
14.80
VSY = ±15V
RL = 2kΩ
144
143
14.78
14.76
142
14.74
141
14.72
140
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
14.70
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
Figure 22. Power Supply Rejection Ratio vs. Temperature
06487-025
+SWING (V)
VOH
06487-022
POWER SUPPLY REJECTION RATIO (dB)
0.01
06487-024
0
Figure 25. +Swing vs. Temperature, VOH
–14.70
0.06
0.04
–14.75
0.02
–14.80
0
VOL
–14.85
–14.90
–0.04
–14.95
–0.06
0
1
2
3
4
5
6
7
8
TIME (s)
9
10
06487-023
–0.02
Figure 23. Voltage Noise (0.1 Hz to 10 Hz)
–15.00
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
Figure 26. −Swing vs. Temperature, VOL
Rev. 0 | Page 9 of 12
100
120
06487-026
–SWING (V)
NOISE (µV)
VSY = ±15V
RL = 2kΩ
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 27. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body (R-8)
Dimensions shown in millimeters and (inches)
Figure 28. 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 = Pb-free part.
Rev. 0 | Page 10 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
AD8676
NOTES
Rev. 0 | Page 11 of 12
AD8676
NOTES
©2006 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05564-0-10/06(0)
Rev. 0 | Page 12 of 12
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