AD8629 Analog Devices Data Sheet
Summary
These zero-drift, auto-zeroing operational amplifiers provide exceptional accuracy with ultra-low offset, drift, and bias currents. Engineered with rail-to-rail input/output swings and low noise, they deliver high stability across a wide operating temperature range. The manual details crucial specifications including pin configurations, advanced noise performance characteristics, and robust electrical data. They are ideally suited for highly sensitive industrial applications such as medical instrumentation, strain gage amplifiers, automotive sensors, and precision current sensing equipment where minimal error is critical.
Page 1 Text Content
Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier
AD8628/AD8629/AD8630 FEATURES PIN CONFIGURATIONS Lowest auto-zero amplifier noise
OUT V+5
AD8628
Low offset voltage: 1 μV
V– TOP VIEW
Input offset drift: 0.002 μV/°C (Not to Scale)
Rail-to-rail input and output swing +IN –IN4
5 V single-supply operation
Figure 1. 5-Lead TSOT (UJ-5) and 5-Lead SOT-23 (RJ-5)
High gain, CMRR, and PSRR: 130 d B Very low input bias current: 100 p A maximum Low supply current: 1.0 m A
NC NC8
Overload recovery time: 50 μs
–IN AD8628 V+7
No external components required
+IN TOP VIEW OUT6
(Not to Scale)
V– NC5
APPLICATIONS NC = NO CONNECT Figure 2. 8-Lead SOIC_N (R-8)
Automotive sensors Pressure and position sensors Strain gage amplifiers
OUT A V+8
Medical instrumentation
–IN A AD8629 OUT B7 Thermocouple amplifiers TOP VIEW
+IN A –IN B6
(Not to Scale)
Precision current sensing V– +IN B5 Photodiode amplifiers
Figure 3. 8-Lead SOIC_N (R-8) and 8-Lead MSOP (RM-8)
GENERAL DESCRIPTION www.BDTIC.com/ADI
OUT A OUT D14
This amplifier has ultralow offset, drift, and bias current.
–IN A –IN D13
The AD8628/AD8629/AD8630 are wide bandwidth auto-zero
+IN A AD8630 +IN D12
amplifiers featuring rail-to-rail input and output swing and low
V+ TOP VIEW V–11 (Not to Scale)
noise. Operation is fully specified from 2.7 V to 5 V single supply +IN B +IN C10
(±1.35 V to ±2.5 V dual supply). –IN B –IN C9 OUT B OUT C8
The AD8628/AD8629/AD8630 provide benefits previously
found only in expensive auto-zeroing or chopper-stabilized Figure 4. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14)
amplifiers. Using Analog Devices, Inc., topology, these zero- drift amplifiers combine low cost with high accuracy and low
The AD8628/AD8629/AD8630 are specified for the extended
noise. No external capacitor is required. In addition, the AD8628/
industrial temperature range (−40°C to +125°C). The AD8628
AD8629/AD8630 greatly reduce the digital switching noise
is available in tiny 5-lead TSOT, 5-lead SOT-23, and 8-lead
found in most chopper-stabilized amplifiers.
narrow SOIC plastic packages. The AD8629 is available in the
With an offset voltage of only 1 μV, drift of less than 0.005 μV/°C,
standard 8-lead narrow SOIC and MSOP plastic packages. The
and noise of only 0.5 μV p-p (0 Hz to 10 Hz), the AD8628/
AD8630 quad amplifier is available in 14-lead narrow SOIC and
AD8629/AD8630 are suited for applications where error
14-lead TSSOP plastic packages.
sources cannot be tolerated. Position and pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over their operating temperature range. Many systems can take advantage of the rail-to-rail input and output swings provided by the AD8628/AD8629/AD8630 to reduce input biasing complexity and maximize SNR.
Rev. G 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
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
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. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2002–2008 Analog Devices, Inc. All rights reserved.
Page Summary Contents For AD8629 Analog Devices Data Sheet
Manual Details
| Brand | Analog Devices |
|---|---|
| Pages | 20 |
| File Size | 418.70 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What is the operating voltage range for this amplifier?
Operation is fully specified from 2.7 V to 5 V single supply, or (±1.35 V to ±2.5 V) dual supply.
Are these amplifiers suitable for high-accuracy applications like medical equipment?
Yes, they are suited for applications where error sources cannot be tolerated, such as medical equipment and strain gage amplifiers.
What is the maximum operating temperature range available?
The specified operating temperature range is industrial (−40°C to +125°C).
Do these devices require external components for proper operation?
No external components are required; for instance, a capacitor is not needed.