Precision, Very Low Noise, Low Input
Bias Current Operational Amplifiers
AD8671/AD8672/AD8674
PIN CONFIGURATIONS
NC 1
V+
–IN 2
TOP VIEW
6 OUT
(Not to Scale)
V– 4
5 NC
V+
TOP VIEW
6 OUT
(Not to Scale)
V– 4
5 NC
NC = NO CONNECT
Figure 1. 8-Lead SOIC_N (R-8)
OUT A 1
8
AD8672
NC
7
+IN 3
03718-B-001
NC = NO CONNECT
8
AD8671
OUT A 1
V+
7
Figure 2. 8-Lead MSOP (RM-8)
OUT B
TOP VIEW
6 –IN B
(Not to Scale)
V– 4
5 +IN B
+IN A 3
–IN A 2
Figure 3. 8-Lead SOIC-N (R-8)
8
AD8672
V+
OUT B
TOP VIEW
6 –IN B
(Not to Scale)
V– 4
5 +IN B
7
+IN A 3
Figure 4. 8-Lead MSOP (RM-8)
14
OUT D
OUT A 1
14
OUT D
–IN A 2
GENERAL DESCRIPTION
OUT A 1
13
–IN D
–IN A 2
13
–IN D
+IN A 3
12
+IN D
+IN A 3
12
+IN D
AD8674
TOP VIEW 11 V–
+IN B 5 (Not to Scale) 10 +IN C
V+ 4
TOP VIEW 11 V–
+IN B 5 (Not to Scale) 10 +IN C
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.
–IN B 6
9
–IN C
OUT B 7
8
OUT C
Figure 5. 14-Lead SOIC_N (R-14)
03718-B-005
V+ 4
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.
AD8674
–IN B 6
9
–IN C
OUT B 7
8
OUT C
Figure 6. 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
Single
Dual
Quad
0.9 nV
AD797
1.1 nV
AD8597
AD8599
1.8 nV
ADA4004-1
ADA4004-2
ADA4004-4
2.8 nV
AD8675
AD8676
3.8 nV
AD8671
AD8672
AD8674
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. E
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.
03718-B-006
PLL filters
Filters for GPS
Instrumentation
Sensors and controls
Professional quality audio
NC
7
+IN 3
–IN A 2
APPLICATIONS
8
AD8671
03718-B-002
NC 1
–IN 2
03718-B-003
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
03718-B-004
FEATURES
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
©2004–2010 Analog Devices, Inc. All rights reserved.
