AD822AR-3V Analog Devices, AD822AR-3V Datasheet

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AD822AR-3V

Manufacturer Part Number
AD822AR-3V
Description
Manufacturer
Analog Devices
Datasheet

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AD822AR-3V
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AD822AR-3V
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a
REV. A
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
TRUE SINGLE SUPPLY OPERATION
HIGH LOAD DRIVE
EXCELLENT AC PERFORMANCE FOR LOW POWER
GOOD DC PERFORMANCE
LOW NOISE
NO PHASE INVERSION
APPLICATIONS
Battery Powered Precision Instrumentation
Photodiode Preamps
Active Filters
12- to 14-Bit Data Acquisition Systems
Medical Instrumentation
Low Power References and Regulators
PRODUCT DESCRIPTION
The AD822 is a dual precision, low power FET input op
amp that can operate from a single supply of +3.0 V to 36 V,
or dual supplies of 1.5 V to 18 V. It has true single supply
Output Swings Rail to Rail
Input Voltage Range Extends Below Ground
Single Supply Capability from +3 V to +36 V
Dual Supply Capability from
Capacitive Load Drive of 350 pF, G = 1
Minimum Output Current of 15 mA
800 A Max Quiescent Current per Amplifier
Unity Gain Bandwidth: 1.8 MHz
Slew Rate of 3.0 V/ s
800 V Max Input Offset Voltage
2 V/ C Typ Offset Voltage Drift
25 pA Max Input Bias Current
13 nV/ Hz @ 10 kHz
100
10
1
10
Input Voltage Noise vs. Frequency
100
FREQUENCY – Hz
1.5 V to
1k
18 V
10k
capability with an input voltage range extending below the
negative rail, allowing the AD822 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 V max, offset voltage drift of 2 V/ C,
input bias currents below 25 pA and low input voltage noise
provide dc precision with source impedances up to a Gigaohm.
1.8 MHz unity gain bandwidth, –93 dB THD at 10 kHz and
3 V/ s slew rate are provided with a low supply current of
800 A per amplifier. The AD822 drives up to 350 pF of direct
capacitive load as a follower, 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 AD822 is available in four performance grades. The A and
B grades are rated over the industrial temperature range of
–40 C to +85 C. There is also a 3 volt grade—the AD822A-3V,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
rated over the industrial temperature range. The mil grade is
rated over the military temperature range of –55 C to +125 C
and is available processed on standard military drawing.
The AD822 is offered in three varieties of 8-pin package: plastic
DIP, hermetic cerdip and surface mount (SOIC) as well as die
form.
Gain of +2 Amplifier; V
at 1.25 Volts, R
Low Power FET-Input Op Amp
(GND)
V
5V
0V
Single Supply, Rail-to-Rail
OUT
8-Pin Plastic DIP, Cerdip and SOIC
CONNECTION DIAGRAM
L
100
0%
90
10
OUT1
= 100 k
–IN1
+IN1
V–
1V
1V
4
1
2
3
S
AD822
= +5, 0, V
1V
IN
8
7
6
5
= 2.5 V Sine Centered
V+
OUT2
–IN2
+IN2
20µ
s
AD822
Fax: 617/326-8703

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AD822AR-3V Summary of contents

Page 1

... FREQUENCY – Hz Input Voltage Noise vs. Frequency REV. A 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices ...

Page 2

AD822–SPECIFICATIONS Parameter DC PERFORMANCE Initial Offset Max Offset over Temperature Offset Drift Input Bias Current at T MAX Input Offset Current at T MAX Open-Loop Gain MIN MAX MIN MAX MIN ...

Page 3

Parameter DC PERFORMANCE Initial Offset Max Offset over Temperature Offset Drift Input Bias Current at T MAX Input Offset Current at T MAX ...

Page 4

AD822–SPECIFICATIONS Parameter DC PERFORMANCE Initial Offset Max Offset over Temperature Offset Drift Input Bias Current at T MAX Input Offset Current at T MAX Open-Loop Gain MIN MAX MIN MAX MIN ...

Page 5

Parameter DC PERFORMANCE Initial Offset Max Offset over Temperature Offset Drift Input Bias Current at T MAX Input Offset Current at T ...

Page 6

... C or less, if the output node is shorted to a supply rail, then the amplifier will not be destroyed, even if this condition persists for an extended period odel AD822AN AD822BN AD822AR AD822BR AD822AR-3V AD822AN-3V AD822A Chips Standard Military 2 Drawing NOTES 1 Spice model is available on ADI Model Disc. 2 Contact factory for availability ...

Page 7

OFFSET VOLTAGE – mV Figure 1. Typical Distribution of Offset Voltage (390 Units –12 –10 –8 ...

Page 8

AD822–Typical Characteristics 10M 0V 100k 10k 100 1k LOAD RESISTANCE – Figure 7. Open-Loop Gain vs. Load Resistance 10M R = 100k 10k L 100k R = 600 L 10k –60 ...

Page 9

GAIN 100pF L –20 10 100 1k 10k 100k FREQUENCY – Hz Figure 13. Open-Loop Gain and Phase Margin vs. Frequency ...

Page 10

AD822–Typical Characteristics 1000 I SOURCE I SINK 100 I SOURCE I SINK 10 I SOURCE I SINK 1 –60 –40 – TEMPERATURE – C Figure 19. Output Saturation Voltage vs. Temperature ...

Page 11

FREQUENCY – Hz Figure 25. Crosstalk vs. Frequency + AD822 4 0.01 F –V S Figure 26. Unity-Gain Follower 5V ...

Page 12

AD822 1V 100 90 10 GND 0% Figure 31 Unity Gain Follower Response Step + 1/2 AD822 Figure ...

Page 13

GND Figure 37 Gain of Two Inverter Response S to 2.5 V Step Centered –1.25 V Below Ground, R 500mV 100 90 10 GND 0% Figure 38 ...

Page 14

AD822 The AD822 is designed for 13 nV/ Hz wideband input voltage noise and maintains low noise performance to low frequencies (refer to Figure 11). This noise performance, along with the AD822’s low input current and current noise means that ...

Page 15

APPLICATIONS Single Supply Voltage-to-Frequency Converter The circuit shown in Figure 44 uses the AD822 to drive a low power timer, which produces a stable pulse of width t positive going output pulse is integrated by R1-C1 and used as one ...

Page 16

AD822 +3V 95.3k 1µ CHANNEL 1 1/2 MYLAR AD822 47.5k 2 4.99k 95.3k 10k 10k 4.99k 6 1/2 47.5k 1µF AD822 CHANNEL MYLAR Figure 46. 3 Volt Single Supply Stereo Headphone Driver 3 Volt, Single ...

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