Precision, Very Low Noise, Low Input
Bias Current Operational Amplifiers
AD8671/AD8672/AD8674
Data Sheet
FEATURES
PIN CONFIGURATIONS
Very low noise: 2.8 nV/√Hz, 77 nV p-p
Wide bandwidth: 10 MHz
NC
–IN
+IN
V–
1
2
3
4
8
7
6
5
NC
V+
AD8671
TOP VIEW
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
OUT
NC
(Not to Scale)
NC = NO CONNECT
Figure 1. 8-Lead SOIC_N (R-8) and 8-Lead MSOP (RM-8)
No phase reversal
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
AD8672
OUT B
–IN B
+IN B
TOP VIEW
APPLICATIONS
PLL filters
(Not to Scale)
Filters for GPS
Figure 2. 8-Lead SOIC-N (R-8) and 8-Lead MSOP (RM-8)
Instrumentation
Sensors and controls
Professional quality audio
OUT A
–IN A
+IN A
V+
1
2
3
4
5
6
7
14 OUT D
13 –IN D
12 +IN D
11 V–
AD8674
GENERAL DESCRIPTION
TOP VIEW
(Not to Scale)
+IN B
–IN B
OUT B
10 +IN C
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
9
8
–IN C
OUT C
consumption. Outputs are stable with capacitive loads of over
Figure 3. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14)
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.
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
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.
1.8 nV
2.8 nV
3.8 nV
Single
Dual
AD797 AD8597 ADA4004-1
AD8599 ADA4004-2
ADA4004-4
AD8675 AD8671
AD8676 AD8672
AD8674
Quad
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.
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 ofthird parties that may result fromits use. Specifications subject to change without notice. No
licenseis granted byimplication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe 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