AD823AR Analog Devices Inc, AD823AR Datasheet

IC OPAMP JFET R-R DUAL LN 8SOIC

AD823AR

Manufacturer Part Number
AD823AR
Description
IC OPAMP JFET R-R DUAL LN 8SOIC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD823AR

Slew Rate
25 V/µs
Rohs Status
RoHS non-compliant
Amplifier Type
J-FET
Number Of Circuits
2
Output Type
Rail-to-Rail
-3db Bandwidth
16MHz
Current - Input Bias
5pA
Voltage - Input Offset
700µV
Current - Supply
7mA
Current - Output / Channel
17mA
Voltage - Supply, Single/dual (±)
3 V ~ 36 V, ±1.5 V ~ 18 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Op Amp Type
Precision
No. Of Amplifiers
2
Bandwidth
16MHz
Supply Voltage Range
± 1.5V To ± 18V
Amplifier Case Style
SOIC
No. Of Pins
8
Gain Bandwidth Product
-
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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FEATURES
Single-supply operation
High load drive
Excellent ac performance on 2.6 mA/amplifier
Good dc performance
Low distortion: −108 dBc worst harmonic @ 20 kHz
Low noise: 16 nV/√Hz @ 10 kHz
No phase inversion with inputs to the supply rails
APPLICATIONS
Battery-powered precision instrumentation
Photodiode preamps
Active filters
12-bit to 16-bit data acquisition systems
Medical instrumentation
GENERAL DESCRIPTION
The AD823 is a dual precision, 16 MHz, JFET input op amp
that can operate from a single supply of 3.0 V to 36 V or from
dual supplies of ±1.5 V to ±18 V. It has true single-supply
capability with an input voltage range extending below ground
in single-supply mode. Output voltage swing extends to within
50 mV of each rail for I
output dynamic range.
An offset voltage of 800 μV maximum, an 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. It provides 16 MHz, −3 dB bandwidth, −108 dB THD
@ 20 kHz, and a 22 V/μs slew rate with a low supply current of
2.6 mA per amplifier. The AD823 drives up to 500 pF of direct
capacitive load as a follower and provides an output current of
15 mA, 0.5 V from the supply rails. This allows the amplifier to
handle a wide range of load conditions.
Rev. D
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.
Output swings rail-to-rail
Input voltage range extends below ground
Single-supply capability from 3 V to 36 V
Capacitive load drive of 500 pF, G = +1
Output current of 15 mA, 0.5 V from supplies
−3 dB bandwidth of 16 MHz, G = +1
350 ns settling time to 0.01% (2 V step)
Slew rate of 22 V/μs
800 μV maximum input offset voltage
2 μV/°C offset voltage drift
25 pA maximum input bias current
OUT
≤ 100 μA, providing outstanding
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
This combination of ac and dc performance, plus the outstanding
load drive capability, results in an exceptionally versatile ampli-
fier for applications such as A/D drivers, high speed active
filters, and other low voltage, high dynamic range systems.
The AD823 is available over the industrial temperature range of
−40°C to +85°C and is offered in both 8-lead PDIP and 8-lead
SOIC packages.
GND
3V
–1
–2
–3
–4
–5
–6
–7
–8
2
1
0
Dual, 16 MHz, Rail-to-Rail
1k
+V
G = +1
S
Figure 2. Output Swing, +V
= +5V
Figure 3. Small Signal Bandwidth, G = +1
500mV
CONNECTION DIAGRAM
OUT1
©1995–2010 Analog Devices, Inc. All rights reserved.
+IN1
–IN1
10k
Figure 1. 8-Lead PDIP and SOIC
–V
S
FET Input Amplifier
1
2
3
4
AD823
FREQUENCY (Hz)
100k
S
8
7
6
5
= +3 V, G = +1
+V
OUT2
–IN2
+IN2
1M
S
200µs
R
C
+V
G = +1
www.analog.com
L
L
S
= 100kΩ
= 50pF
AD823
10M
= +3V

Related parts for AD823AR

AD823AR Summary of contents

Page 1

FEATURES Single-supply operation Output swings rail-to-rail Input voltage range extends below ground Single-supply capability from High load drive Capacitive load drive of 500 pF Output current of 15 mA, 0.5 V from ...

Page 2

AD823 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Connection Diagram ....................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 6 Thermal Resistance ...................................................................... 6 ESD Caution .................................................................................. 6 REVISION HISTORY ...

Page 3

SPECIFICATIONS 25° kΩ to 2.5 V, unless otherwise noted Table 1. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth, V ≤ 0.2 V p-p O Full Power Response Slew ...

Page 4

AD823 25° +3 kΩ to 1.65 V, unless otherwise noted Table 2. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth, V ≤ 0.2 V p-p O Full Power Response Slew ...

Page 5

25° ± kΩ unless otherwise noted Table 3. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth, V ≤ 0.2 V p-p O Full Power Response Slew Rate ...

Page 6

AD823 ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Supply Voltage Internal Power Dissipation PDIP (N) SOIC (R) Input Voltage (Common Mode) Differential Input Voltage Output Short-Circuit Duration Storage Temperature Range N, R Operating Temperature Range Lead Temperature Range (Soldering, 10 sec) ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS –200 –150 –100 – INPUT OFFSET VOLTAGE (µV) Figure 5. Typical Distribution of Input Offset Voltage ...

Page 8

AD823 110 V = ±2.5V S 100 100 10k LOAD RESISTANCE (Ω) Figure 11. Open-Loop Gain vs. Load Resistance 1000 R = 10kΩ L 100 R = 1kΩ 100Ω ...

Page 9

FREQUENCY (MHz) Figure 17. Closed-Loop Gain vs. Frequency 100 +V = +5V S GAIN = ...

Page 10

AD823 100 +PSRR –PSRR 100 1k 10k 100k FREQUENCY (Hz) Figure 23. Power Supply Rejection vs. Frequency + + ...

Page 11

R = 300Ω 50pF 2kΩ + –1 500mV GND Figure 29. Output Swing − ...

Page 12

AD823 R = 100kΩ 50pF ±15V +10V –10V 5V Figure 35. Pulse Response ± 500ns Rev Page ...

Page 13

THEORY OF OPERATION The AD823 is fabricated on the Analog Devices, Inc. proprietary complementary bipolar (CB) process that enables the construction of PNP and NPN transistors with similar f 800 MHz region. In addition, the process also features N-Channel JFETs ...

Page 14

AD823 OUTPUT IMPEDANCE The low frequency open-loop output impedance of the common- emitter output stage used in this design is approximately 30 kΩ. Although this is significantly higher than a typical emitter follower output stage, when it is connected with ...

Page 15

APPLICATION NOTES INPUT CHARACTERISTICS In the AD823, N-Channel JFETs are used to provide a low offset, low noise, high impedance input stage. Minimum input common- mode voltage extends from 0.2 V below −V the input voltage closer to the positive ...

Page 16

AD823 Figure 40 shows a schematic of an AD823 being used to drive both the input and reference input of an AD1672, a 12-bit, 3-MSPS, single-supply ADC. One amplifier is configured as a unity-gain follower to drive the analog input ...

Page 17

Second-Order Low-Pass Filter Figure 43 depicts the AD823 configured as a second-order Butterworth low-pass filter. With the values as shown, the corner frequency equals 200 kHz. Component selection is shown in the following equations User Selected ...

Page 18

AD823 OUTLINE DIMENSIONS 0.210 (5.33) MAX 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE ...

Page 19

... AD823AR-REEL −40°C to +85°C AD823AR-REEL7 −40°C to +85°C AD823ARZ −40°C to +85°C AD823ARZ-RL −40°C to +85°C AD823ARZ-R7 −40°C to +85°C AD823AR-EBZ RoHS Compliant Part. Package Description 8-Lead PDIP 8-Lead PDIP 8-Lead SOIC_N 8-Lead SOIC_N, 13” ...

Page 20

AD823 NOTES ©1995–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00901-0-6/10(D) Rev Page ...

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