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AD823ARZ-R7 ADI芯片 电子元器件中文版规格手册.pdf
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AD823ARZ-R7 ADI芯片 电子元器件中文版规格手册
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Dual, 16 MHz, Rail-to-Rail
FET Input Amplifier
Data Sheet
AD823
Rev. E
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 ©1995–2011 Analog Devices, Inc. All rights reserved.
FEATURES
Single-supply operation
Output swings rail-to-rail
Input voltage range extends below ground
Single-supply capability from 3 V to 36 V
High load drive
Capacitive load drive of 500 pF, G = +1
Output current of 15 mA, 0.5 V from supplies
Excellent ac performance on 2.6 mA/amplifier
−3 dB bandwidth of 16 MHz, G = +1
350 ns settling time to 0.01% (2 V step)
Slew rate of 22 V/µs
Good dc performance
800 µV maximum input offset voltage
2 µV/°C offset voltage drift
25 pA maximum input bias current
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
OUT
≤ 100 µA, providing outstanding
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.
CONNECTION DIAGRAM
AD823
OUT1
+IN2
–IN2
OUT2
+V
S
–IN1
+IN1
–V
S
1
2
3
4
8
7
6
5
00901-001
Figure 1. 8-Lead PDIP and SOIC
3V
GND
00901-002
R
L
= 100kΩ
C
L
= 50pF
+V
S
= +3V
G = +1
500mV 200µs
Figure 2. Output Swing, +V
S
= +3 V, G = +1
FREQUENCY (Hz)
–8
OUTPUT (dB)
1k
–6
–7
2
1
10k 100k 1M
+V
S
= +5V
G = +1
–5
–4
–3
–2
–1
0
10M
00901-003
Figure 3. Small Signal Bandwidth, G = +1
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.
AD823 Data Sheet
Rev. E | Page 2 of 20
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
Typical Performance Characteristics ..............................................7
Theory of Operation ...................................................................... 13
Output Impedance ..................................................................... 14
Application Notes ........................................................................... 15
Input Characteristics .................................................................. 15
Output Characteristics............................................................... 15
Outline Dimensions ....................................................................... 18
Ordering Guide .......................................................................... 19
REVISION HISTORY
11/11—Rev. D to Rev. E
Changes to Theory of Operation Section .................................... 13
Changes to Ordering Guide .......................................................... 19
6/10—Rev. C to Rev. D
Changes to Figure 34 ...................................................................... 11
Changes to Figure 36 ...................................................................... 13
5/10—Rev. B to Rev. C
Changes to Table 4 ............................................................................ 6
2/07—Rev. A to Rev. B
Updated Format .................................................................. Universal
Changes to DC Performance .......................................................... 5
Updated Outline Dimensions ....................................................... 18
Changes to Ordering Guide ......................................................... 19
5/04—Rev. 0 to Rev. A
Changes to Specifications ................................................................ 2
Changes to Ordering Guide ......................................................... 17
Updated Outline Dimensions ....................................................... 17
5/95—Revision 0: Initial Version
Data Sheet AD823
Rev. E | Page 3 of 20
SPECIFICATIONS
At T
A
= 25°C, +V
S
= +5 V, R
L
= 2 kΩ to 2.5 V, unless otherwise noted.
Table 1.
Parameter Conditions Min Typ Max Unit
DYNAMIC PERFORMANCE
−3 dB Bandwidth, V
O
≤ 0.2 V p-p
G = +1
12
16
MHz
Full Power Response V
O
= 2 V p-p 3.5 MHz
Slew Rate G = −1, V
O
= 4 V Step 14 22 V/µs
Settling Time
to 0.1% G = −1, V
O
= 2 V Step 320 ns
to 0.01%
G = −1, V
O
= 2 V Step
350
ns
NOISE/DISTORTION PERFORMANCE
Input Voltage Noise f = 10 kHz 16 nV/√Hz
Input Current Noise
f = 1 kHz
1
fA/√Hz
Harmonic Distortion R
L
= 600 Ω to 2.5 V, V
O
= 2 V p-p, f = 20 kHz −108 dBc
Crosstalk
f = 1 kHz R
L
= 5 kΩ −105 dB
f = 1 MHz R
L
= 5 kΩ −63 dB
DC PERFORMANCE
Initial Offset 0.2 0.8 mV
Maximum Offset Over temperature 0.3 2.0 mV
Offset Drift
2
µV/°C
Input Bias Current V
CM
= 0 V to 4 V 3 25 pA
at T
MAX
V
CM
= 0 V to 4 V 0.5 5 nA
Input Offset Current 2 20 pA
at T
MAX
0.5 nA
Open-Loop Gain V
O
= 0.2 V to 4 V, R
L
= 2 kΩ 20 45 V/mV
T
MIN
to T
MAX
20
V/mV
INPUT CHARACTERISTICS
Input Common-Mode Voltage Range −0.2 to +3 −0.2 to +3.8 V
Input Resistance
10
13
Ω
Input Capacitance 1.8 pF
Common-Mode Rejection Ratio V
CM
= 0 V to 3 V 60 76 dB
OUTPUT CHARACTERISTICS
Output Voltage Swing
I
L
= ±100 µA 0.025 to 4.975 V
I
L
= ±2 mA 0.08 to 4.92 V
I
L
= ±10 mA 0.25 to 4.75 V
Output Current
V
OUT
= 0.5 V to 4.5 V
16
mA
Short-Circuit Current Sourcing to 2.5 V 40 mA
Sinking to 2.5 V 30 mA
Capacitive Load Drive G = +1 500 pF
POWER SUPPLY
Operating Range 3 36 V
Quiescent Current T
MIN
to T
MAX
, total 5.2 5.6 mA
Power Supply Rejection Ratio V
S
= 5 V to 15 V, T
MIN
to T
MAX
70 80 dB
AD823 Data Sheet
Rev. E | Page 4 of 20
At T
A
= 25°C, +V
S
= +3.3 V, R
L
= 2 kΩ to 1.65 V, unless otherwise noted.
Table 2.
Parameter Conditions Min Typ Max Unit
DYNAMIC PERFORMANCE
−3 dB Bandwidth, V
O
≤ 0.2 V p-p G = +1 12 15 MHz
Full Power Response V
O
= 2 V p-p 3.2 MHz
Slew Rate
G = −1, V
O
= 2 V Step
13
20
V/µs
Settling Time
to 0.1% G = −1, V
O
= 2 V Step 250 ns
to 0.01% G = −1, V
O
= 2 V Step 300 ns
NOISE/DISTORTION PERFORMANCE
Input Voltage Noise f = 10 kHz 16 nV/√Hz
Input Current Noise f = 1 kHz 1 fA/√Hz
Harmonic Distortion R
L
= 100 Ω, V
O
= 2 V p-p, f = 20 kHz −93 dBc
Crosstalk
f = 1 kHz R
L
= 5 kΩ −105 dB
f = 1 MHz R
L
= 5 kΩ −63 dB
DC PERFORMANCE
Initial Offset 0.2 1.5 mV
Maximum Offset Over temperature 0.5 2.5 mV
Offset Drift 2 µV/°C
Input Bias Current V
CM
= 0 V to 2 V 3 25 pA
at T
MAX
V
CM
= 0 V to 2 V 0.5 5 nA
Input Offset Current 2 20 pA
at T
MAX
0.5 nA
Open-Loop Gain V
O
= 0.2 V to 2 V, R
L
= 2 kΩ 15 30 V/mV
T
MIN
to T
MAX
12 V/mV
INPUT CHARACTERISTICS
Input Common-Mode Voltage Range −0.2 to +1 −0.2 to +1.8 V
Input Resistance 10
13
Ω
Input Capacitance 1.8 pF
Common-Mode Rejection Ratio
V
CM
= 0 V to 1 V
54
70
dB
OUTPUT CHARACTERISTICS
Output Voltage Swing
I
L
= ±100 µA
0.025 to 3.275
V
I
L
= ±2 mA 0.08 to 3.22 V
I
L
= ±10 mA 0.25 to 3.05 V
Output Current V
OUT
= 0.5 V to 2.5 V 15 mA
Short-Circuit Current Sourcing to 1.5 V 40 mA
Sinking to 1.5 V 30 mA
Capacitive Load Drive G = +1 500 pF
POWER SUPPLY
Operating Range
3
36
V
Quiescent Current T
MIN
to T
MAX
, total 5.0 5.7 mA
Power Supply Rejection Ratio V
S
= 3.3 V to 15 V, T
MIN
to T
MAX
70 80 dB
Data Sheet AD823
Rev. E | Page 5 of 20
At T
A
= 25°C, V
S
= ±15 V, R
L
= 2 kΩ to 0 V, unless otherwise noted.
Table 3.
Parameter Conditions Min Typ Max Unit
DYNAMIC PERFORMANCE
−3 dB Bandwidth, V
O
≤ 0.2 V p-p G = +1 12 16 MHz
Full Power Response V
O
= 2 V p-p 4 MHz
Slew Rate
G = −1, V
O
= 10 V Step
17
25
V/µs
Settling Time
to 0.1% G = −1, V
O
= 10 V Step 550 ns
to 0.01% G = −1, V
O
= 10 V Step 650 ns
NOISE/DISTORTION PERFORMANCE
Input Voltage Noise f = 10 kHz 16 nV/√Hz
Input Current Noise f = 1 kHz 1 fA/√Hz
Harmonic Distortion R
L
= 600 Ω, V
O
= 10 V p-p, f = 20 kHz −90 dBc
Crosstalk
f = 1 kHz R
L
= 5 kΩ −105 dB
f = 1 MHz R
L
= 5 kΩ −63 dB
DC PERFORMANCE
Initial Offset 0.7 3.5 mV
Maximum Offset Over temperature 1.0 7 mV
Offset Drift 2 µV/°C
Input Bias Current V
CM
= 0 V 5 30 pA
V
CM
= −10 V 60 pA
at T
MAX
V
CM
= 0 V 0.5 5 nA
Input Offset Current 2 20 pA
at T
MAX
0.5 nA
Open-Loop Gain V
O
= +10 V to −10 V, R
L
= 2 kΩ 30 60 V/mV
T
MIN
to T
MAX
30 V/mV
INPUT CHARACTERISTICS
Input Common-Mode Voltage Range −15.2 to +13 −15.2 to +13.8 V
Input Resistance 10
13
Ω
Input Capacitance
1.8
pF
Common-Mode Rejection Ratio V
CM
= −15 V to +13 V 66 82 dB
OUTPUT CHARACTERISTICS
Output Voltage Swing
I
L
= ±100 µA −14.95 to +14.95 V
I
L
= ±2 mA −14.92 to +14.92 V
I
L
= ±10 mA −14.75 to +14.75 V
Output Current V
OUT
= −14.5 V to +14.5 V 17 mA
Short-Circuit Current Sourcing to 0 V 80 mA
Sinking to 0 V 60 mA
Capacitive Load Drive G = +1 500 pF
POWER SUPPLY
Operating Range 3 36 V
Quiescent Current T
MIN
to T
MAX
, total 7.0 8.4 mA
Power Supply Rejection Ratio V
S
= 5 V to 15 V, T
MIN
to T
MAX
70 80 dB
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