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AD8674ARUZ-REEL

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
Precision, Very Low Noise, Low Input
Bias Current
Operational Amplifiers
Data Sheet
AD8671/AD8672/AD8674
Rev. F Document Feedback
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 ©2004–2013 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
Very low noise: 2.8 nV/√Hz, 77 nV p-p
Wide bandwidth: 10 MHz
Low input bias current: 12 nA max
Low offset voltage: 75 μV max
High open-loop gain: 120 dB min
Low supply current: 3 mA typ per amplifier
Dual-supply operation: ±5 V to ±15 V
Unity-gain stable
No phase reversal
APPLICATIONS
PLL filters
Filters for GPS
Instrumentation
Sensors and controls
Professional quality audio
GENERAL DESCRIPTION
The AD8671/AD8672/AD8674 are very high precision amplifiers
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 AD8671/AD8672/AD8674’s combination of ultralow noise,
high precision, speed, and stability is unmatched. The MSOP
version of the AD8671/AD8672 requires only half the board
space of comparable amplifiers.
Applications for these amplifiers 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 AD8671/AD8672 are specified over the extended industrial
temperature range (−40°C to +125°C), and the AD8674 is specified
over the industrial temperature range (−40°C to +85°C).
The AD8671/AD8672 are available in the 8-lead SOIC and
8-lead MSOP packages. The AD8674 is available in 14-lead
SOIC and 14-lead TSSOP packages.
Surface-mount devices in MSOP packages are available in tape
and reel only.
PIN CONFIGURATIONS
NC = NO CONNECT
NC
1
–
IN
2
+
IN
3
V–
4
NC
V+
OUT
NC
8
7
6
5
03718-B-001
AD8671
TOP VIEW
(Not to Scale)
Figure 1. 8-Lead SOIC_N (R-8) and 8-Lead MSOP (RM-8)
OUT A
1
–IN A
2
+IN A
3
V–
4
V+
OUT B
–IN B
+IN B
8
7
6
5
03718-B-003
AD8672
TOP VIEW
(Not to Scale)
Figure 2. 8-Lead SOIC-N (R-8) and 8-Lead MSOP (RM-8)
OUT A
1
–IN A
2
+IN A
3
V+
4
+IN B
5
–IN B
6
OUT B
7
OUT D
–IN D
+IN D
V–
14
13
12
11
+IN C
–IN C
OUT C
10
9
8
03718-B-005
AD8674
TOP VIEW
(Not to Scale)
Figure 3. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14)
The AD8671, AD8672, and AD8674 are members of a growing
series of low noise op amps offered by Analog Devices, Inc.
Table 1. Voltage Noise
Package 0.9 nV 1.1 nV 1.8 nV 2.8 nV 3.8 nV
Single AD797 AD8597 ADA4004-1 AD8675 AD8671
Dual AD8599 ADA4004-2 AD8676 AD8672
Quad ADA4004-4 AD8674
AD8671/AD8672/AD8674 Data Sheet
Rev. F | Page 2 of 20
TABLE OF CONTENTS
Specifications ..................................................................................... 3
Electrical Characteristics, ±5.0 V ............................................... 3
Electrical Characteristics, ±15 V ................................................ 4
Absolute Maximum Ratings ............................................................ 5
ESD Caution .................................................................................. 5
Typical Performance Characteristics ............................................. 6
Applications ..................................................................................... 11
Power Dissipation Calculations ................................................ 11
Unity-Gain Follower Applications ........................................... 11
Output Phase Reversal ............................................................... 12
Total Noise vs. Source Resistance ............................................. 12
Total Harmonic Distortion (THD) and Noise ....................... 13
Driving Capacitive Loads .......................................................... 13
GPS Receiver ............................................................................... 14
Band-Pass Filter .......................................................................... 14
PLL Synthesizers and Loop Filters ........................................... 14
Outline Dimensions ....................................................................... 15
Ordering Guide .......................................................................... 17
REVISION HISTORY
3/13—Rev. E to Rev. F
Added Figure 7 .............................................................................. 6
Updated Outline Dimensions ................................................... 15
Changes to Ordering Guide ...................................................... 17
6/10—Rev. D to Rev. E
Added Table 1 and Preceding Sentence ..................................... 1
12/09—Rev. C to Rev. D
Changes to Features and General Description Sections .......... 1
Changes to Absolute Maximum Ratings Section, Table 3,
and Table 4 ................................................................................ 5
Added Power Dissipation Calculations Section ..................... 11
Updated Outline Dimensions ................................................... 15
Changes to Ordering Guide ...................................................... 17
6/05—Rev. B to Rev. C
Changes to Figure 6 ...................................................................... 1
Updated Outline Dimensions ................................................... 14
Changes to Ordering Guide ...................................................... 16
4/04—Rev. A to Rev. B
Changes to Figure 32 .................................................................. 11
Changes to Figures 36, 37, and 38 ............................................ 12
1/04—Rev. 0 to Rev. A
Added AD8672 and AD8674 parts .............................. Universal
Changes to Specifications ............................................................. 3
Deleted Figure 3 ............................................................................. 6
Changes to Figures 7, 8, and 9 ..................................................... 6
Changes to Figure 37 .................................................................. 12
Added new Figure 32 ................................................................. 10
Data Sheet AD8671/AD8672/AD8674
Rev. F | Page 3 of 20
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS, ±5.0 V
V
S
= ±5.0 V, V
CM
= 0 V, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
20 75 µV
–40°C < T
A
< +125°C 30 125 µV
Offset Voltage Drift
∆V
OS
/∆T
–40°C < T
A
< +125°C
AD8671 0.3 0.5 µV/°C
AD8672/AD8674 0.3 0.8 µV/°C
Input Bias Current I
B
–12 +3 +12 nA
+25°C < T
A
< +125°C –20 +5 +20 nA
–40°C < T
A
< +125°C
–40
+8
+40
Input Offset Current I
OS
–12 +6 +12 nA
+25°C < T
A
< +125°C –20 +6 +20 nA
–40°C < T
A
< +125°C –40 +8 +40 nA
Input Voltage Range –2.5 +2.5 V
Common-Mode Rejection Ratio CMRR V
CM
= –2.5 V to +2.5 V 100 120 dB
Large Signal Voltage Gain A
VO
R
L
= 2 kΩ, V
O
= –3 V to +3 V 1000 6000 V/mV
Input Capacitance, Common Mode C
INCM
6.25 pF
Input Capacitance, Differential Mode C
INDM
7.5 pF
Input Resistance, Common Mode R
IN
3.5 GΩ
Input Resistance, Differential Mode R
INDM
15 MΩ
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
R
L
= 2 kΩ, –40°C to +125°C +3.8 +4.0 V
Output Voltage Low V
OL
R
L
= 2 kΩ, –40°C to +125°C –3.9 –3.8 V
Output Voltage High
V
OH
R
L
= 600 Ω
+3.7
+3.9
Output Voltage Low V
OL
R
L
= 600 Ω –3.8 –3.7 V
Output Current I
OUT
±10 mA
POWER SUPPLY
Power Supply Rejection Ratio PSRR V
S
= ±4 V to ±18 V
AD8671/AD8672 110 130 dB
AD8674 106 115 dB
Supply Current/Amplifier I
SY
V
O
= 0 V 3 3.5 mA
–40°C < T
A
< +125°C 4.2 mA
DYNAMIC PERFORMANCE
Slew Rate SR R
L
= 2 kΩ 4 V/µs
Settling Time
t
S
To 0.1% (4 V step, G = 1)
1.4
To 0.01% (4 V step, G = 1) 5.1 µs
Gain Bandwidth Product GBP 10 MHz
NOISE PERFORMANCE
Peak-to-Peak Noise e
n p-p
0.1 Hz to 10 Hz 77 100 nV p-p
Voltage Noise Density e
n
f = 1 kHz 2.8 3.8 nV/√Hz
Current Noise Density i
n
f = 1 kHz 0.3 pA/√Hz
Channel Separation
AD8672/AD8674 C
S
f = 1 kHz –130 dB
f = 10 kHz
–105
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

AD8674ARUZ-REEL

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Analog Devices Inc.
Description:
Precision Amplifiers Prec Low Noise Low Input Bias Crnt Quad
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