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AD820ANZ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
Single-Supply, Rail-to-Rail,
Low Power, FET Input Op Amp
AD820
Rev. H
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 ©1996–2011 Analog Devices, Inc. All rights reserved.
FEATURES
True single-supply operation
Output swings rail-to-rail
Input voltage range extends below ground
Single-supply capability from 5 V to 30 V
Dual-supply capability from ±2.5 V to ±15 V
Excellent load drive
Capacitive load drive up to 350 pF
Minimum output current of 15 mA
Excellent ac performance for low power
800 μA maximum quiescent current
Unity-gain bandwidth: 1.8 MHz
Slew rate of 3 V/μs
Excellent dc performance
800 μV maximum input offset voltage
2 μV/°C typical offset voltage drift
25 pA maximum input bias current
Low noise: 13 nV/√Hz @ 10 kHz
APPLICATIONS
Battery-powered precision instrumentation
Photodiode preamps
Active filters
12-bit to 14-bit data acquisition systems
Medical instrumentation
Low power references and regulators
PIN CONFIGURATIONS
NC = NO CONNECT
NULL
1
–IN
2
+IN
3
–V
S
4
NC
8
+V
S
7
V
OUT
6
NULL
5
AD820
TOP VIEW
(Not to Scale)
00873-001
Figure 1. 8-Lead PDIP
NC = NO CONNECT
NC
1
–IN
2
+IN
3
–V
S
4
NC
8
+V
S
7
V
OUT
6
NC
5
AD820
TOP VIEW
(Not to Scale)
00873-002
Figure 2. 8-Lead SOIC_N and 8-Lead MSOP
GENERAL DESCRIPTION
The AD820 is a precision, low power FET input op amp that
can operate from a single supply of 5 V to 36 V, or dual supplies
of ±2.5 V to ±18 V. It has true single-supply capability, with an
input voltage range extending below the negative rail, allowing
the AD820 to accommodate input signals below ground in the
single-supply mode. Output voltage swing extends to within
10 mV of each rail, providing the maximum output dynamic range.
Offset voltage of 800 μV maximum, offset voltage drift of
2 μV/°C, typical input bias currents below 25 pA, and low input
voltage noise provide dc precision with source impedances up
to 1 GΩ. 1.8 MHz unity gain bandwidth, −93 dB THD at
10 kHz, and 3 V/μs slew rate are provided for a low supply
current of 800 μA. The AD820 drives up to 350 pF of direct
capacitive load and provides a minimum output current of
15 mA. This allows the amplifier to handle a wide range of load
conditions. This combination of ac and dc performance, plus
the outstanding load drive capability, results in an exceptionally
versatile amplifier for the single-supply user.
The AD820 is available in two performance grades. The A and
B grades are rated over the industrial temperature range of
−40°C to +85°C. The AD820 is offered in three 8-lead package
options: plastic DIP (PDIP), surface mount (SOIC) and (MSOP).
00873-004
100
90
10
0%
1V1V
1V
20µs
Figure 3. Gain-of-2 Amplifier; V
S
= 5 V, 0 V, V
IN
= 2.5 V Sine Centered at 1.25 V
AD820* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
View a parametric search of comparable parts.
EVALUATION KITS
• EVAL-OPAMP-1 Evaluation Board
DOCUMENTATION
Application Notes
• AN-106: A Collection of Amp Applications
• AN-358: Noise and Operational Amplifier Circuits
• AN-649: Using the Analog Devices Active Filter Design
Tool
Data Sheet
• AD820: Single-Supply, Rail-to-Rail, Low Power, FET-Input
Op Amp Data Sheet
TOOLS AND SIMULATIONS
• Analog Filter Wizard
• Analog Photodiode Wizard
• AD820 SPICE Macro-Model
DESIGN RESOURCES
• AD820 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
DISCUSSIONS
View all AD820 EngineerZone Discussions.
SAMPLE AND BUY
Visit the product page to see pricing options.
TECHNICAL SUPPORT
Submit a technical question or find your regional support
number.
DOCUMENT FEEDBACK
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AD820
Rev. H | Page 2 of 24
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Pin Configurations ........................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 9
Thermal Resistance ...................................................................... 9
ESD Caution .................................................................................. 9
Typical Performance Characteristics ........................................... 10
Applications Information .............................................................. 16
Input Characteristics .................................................................. 16
Output Characteristics............................................................... 17
Single-Supply Half-Wave and Full-Wave Rectifiers .............. 17
4.5 V Low Dropout, Low Power Reference ............................. 18
Low Power, 3-Pole, Sallen Key Low-Pass Filter ...................... 18
Offset Voltage Adjustment ............................................................ 19
Outline Dimensions ....................................................................... 20
Ordering Guide .......................................................................... 21
REVISION HISTORY
3/11—Rev. G to Rev. H
Changes to Figure 43 ...................................................................... 18
2/10—Rev. F to Rev. G
Changes to Features Section............................................................ 1
Changes to Open-Loop Gain Parameter ....................................... 3
Changes to Input Voltage Parameter ............................................. 9
Updated Outline Dimensions ....................................................... 20
11/08—Rev. E to Rev. F
Added 8-Lead MSOP ......................................................... Universal
Changes to Features Section, Figure 2 Caption, and General
Description Section .......................................................................... 1
Changes to Settling Time Parameter, Common-Mode Voltage
Range Parameter, and Power Supply Rejection Parameter in
Table 1 ................................................................................................ 3
Changes to Settling Time Parameter, Common-Mode Voltage
Range Parameter, and Power Supply Rejection Parameter in
Table 2 ................................................................................................ 5
Changes to Settling Time Parameter, Common-Mode Voltage
Range Parameter, and Power Supply Rejection Parameter in
Table 3 ................................................................................................ 7
Changes to Table 4 ............................................................................ 9
Added Thermal Resistance Section ............................................... 9
Added Table 5; Renumbered Sequentially ..................................... 9
Changes to Figure 26 ...................................................................... 13
Changes to Figure 27 ...................................................................... 14
Changed Application Notes Section to Applications
Information Section ....................................................................... 16
Changes to Figure 40, Figure 41, and Figure 42 ......................... 17
Changes to Figure 44 ...................................................................... 18
Moved Offset Voltage Adjustment Section ................................. 19
Updated Outline Dimensions ....................................................... 20
Added Figure 49; Renumbered Sequentially .............................. 21
Changes to Ordering Guide .......................................................... 21
2/07—Rev. D to Rev. E
Updated Format .................................................................. Universal
Updated Outline Dimensions ....................................................... 21
Changes to the Ordering Guide ................................................... 22
5/02—Rev. C to Rev. D
Change to SOIC Package (R-8) Drawing .................................... 15
Edits to Features................................................................................. 1
Edits to Product Description ........................................................... 1
Delete Specifications for AD820A-3 V ........................................... 5
Edits to Ordering Guide ................................................................... 6
Edits to Typical Performance Characteristics ................................ 8
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

AD820ANZ

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Manufacturer:
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Description:
Precision Amplifiers SGL-Supply RR Lo Pwr FET-Inpt
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