Data Sheet
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
High load drive
Capacitive load drive of 350 pF, G = +1
Minimum output current of 15 mA
Excellent ac performance for low power
800 µA maximum quiescent current per amplifier
Unity-gain bandwidth: 1.8 MHz
Slew rate of 3 V/μs
Good 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 at 10 kHz
No phase inversion
Single-Supply, Rail-to-Rail
Low Power FET-Input Op Amp
AD822
CONNECTION DIAGRAM
OUT1 1
–IN1 2
+IN1 3
V– 4
8 V+
7 OUT2
6 –IN2
AD822
5 +IN2
Figure 1. 8-Lead PDIP (N Suffix);
8-Lead MSOP (RM Suffix);
and 8-Lead SOIC_N (R Suffix)
APPLICATIONS
Battery-powered precision instrumentation
Photodiode preamps
Active filters
12-bit to 14-bit data acquisition systems
Medical instrumentation
Low power references and regulators
GENERAL DESCRIPTION
The
AD822
is a dual precision, low power FET input op amp
that can operate from a single supply of 5 V to 30 V or from
dual supplies of ±2.5 V to ±15 V. It has true single-supply capability
with an input voltage range extending below the negative rail,
allowing the
AD822
to accommodate input signals below ground
while 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,
input bias currents below 25 pA, and low input voltage noise
provide dc precision with source impedances up to a gigaohm.
The 1.8 MHz unity-gain bandwidth, –93 dB total harmonic
distortion (THD) at 10 kHz, and 3 V/µs slew rate are provided
with a low supply current of 800 µA per amplifier.
100
INPUT VOLTAGE NOISE (nV/√Hz)
10
00874-001
1
10
100
1k
FREQUENCY (Hz)
10k
Figure 2. Input Voltage Noise vs. Frequency
Rev. J
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Trademarks and registered trademarks are the property of their respective owners.
00874-002
AD822
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Connection Diagram ....................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 4
Absolute Maximum Ratings .......................................................... 10
Thermal Resistance .................................................................... 10
Maximum Power Dissipation ................................................... 10
ESD Caution ................................................................................ 10
Data Sheet
Typical Performance Characteristics ........................................... 11
Applications Information .............................................................. 18
Input Characteristics .................................................................. 18
Output Characteristics............................................................... 18
Single-Supply Voltage to Frequency Converter ..................... 19
Single-Supply Programmable Gain Instrumentation
Amplifier ..................................................................................... 20
Low Dropout Bipolar Bridge Driver ........................................ 20
Outline Dimensions ....................................................................... 21
Ordering Guide .......................................................................... 22
REVISION HISTORY
9/15—Rev. I to Rev. J
Changes to Figure 12 ...................................................................... 12
1/10—Rev. H to Rev. I
Changes to Features Section and General Description Section . 1
Changes to Endnote 1, Table 1 ........................................................ 5
Changes to Endnote 1, Table 2 ........................................................ 7
Changes to Endnote 1, Table 3 ........................................................ 9
Deleted Table 4; Renumbered Sequentially................................. 10
Changes to Table 5 .......................................................................... 12
Updated Outline Dimensions ....................................................... 21
Changes to Ordering Guide .......................................................... 22
Deleted 3 V, Single-Supply Stereo Headphone Driver Section. 22
Deleted Figure 50; Renumbered Sequentially............................. 22
8/08—Rev. G to Rev H.
Changes to Features Section and General Description Section . 1
Changed V
O
to V
OUT
Throughout ................................................... 4
Changes to Table 1 ............................................................................ 4
Changes to Table 2 ............................................................................ 6
Changes to Table 3 ............................................................................ 8
Changes to Table 5 .......................................................................... 12
Added Table 6; Renumbered Sequentially .................................. 12
Changes to Figure 13 Caption....................................................... 14
Changes to Figure 29, Figure 31, and Figure 35 ......................... 17
Changes to Figure 36 ...................................................................... 18
Changed Application Notes Section to Applications
Information Section ....................................................................... 20
Changes to Figure 46 and Figure 47............................................. 21
Changes to Figure 49 ...................................................................... 22
Changes to Figure 51 ...................................................................... 23
6/06—Rev. F to Rev. G
Changes to Features.......................................................................... 1
Changes to Table 4 .......................................................................... 10
Changes to Table 5 .......................................................................... 12
Changes to Table 6 .......................................................................... 22
Rev. J | Page 2 of 24
10/05—Rev. E to Rev. F
Updated Format .................................................................. Universal
Changes to Outline Dimensions .................................................. 24
Updated Ordering Guide .............................................................. 24
1/03—Rev. D to Rev. E
Edits to Specifications .......................................................................2
Edits to Figure 10 ............................................................................ 16
Updated Outline Dimensions ....................................................... 17
10/02—Rev. C to Rev. D
Edits to Features.................................................................................1
Edits to Ordering Guide ...................................................................6
Updated SOIC Package Outline ................................................... 17
8/02—Rev. B to Rev. C
All Figures Updated ........................................................... Universal
Edits to Features.................................................................................1
Updated All Package Outlines ...................................................... 17
7/01—Rev. A to Rev. B
All Figures Updated ........................................................... Universal
CERDIP References Removed .......................................1, 6, and 18
Additions to Product Description ...................................................1
8-Lead SOIC and 8-Lead MSOP Diagrams Added ......................1
Deletion of AD822S Column ...........................................................2
Edits to Absolute Maximum Ratings and Ordering Guide .........6
Removed Metallization Photograph ...............................................6
7/93—Revision 0: Initial Version
Analog electronics
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