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PDF AD823A Data sheet ( Hoja de datos )
| Número de pieza | AD823A | |
| Descripción | Rail-to-Rail FET Input Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
Wide Supply Dual, 17 MHz, Rail-to-Rail
FET Input Amplifier
AD823A
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 470 pF (G = +1, 25% overshoot)
Linear output current of 40 mA, 0.5 V from supplies
Excellent ac performance on 2.6 mA/amplifier
−3 dB bandwidth of 17 MHz, G = +1
325 ns settling time to 0.01% (2 V step)
Slew rate of 30 V/μs
Low distortion: −108 dBc at 20 kHz (G = −1, RL = 2 kΩ)
Good dc performance
700 μV maximum input offset voltage
1 μV/°C offset voltage drift
25 pA maximum input bias current
Low noise: 14 nV/√Hz at 10 kHz
No phase inversion with inputs to the supply rails
APPLICATIONS
Photodiode preamps
Active filters
12-bit to 16-bit data acquisition systems
Medical instrumentation
Precision instrumentation
GENERAL DESCRIPTION
The AD823A is a dual precision, 17 MHz, JFET input op amp
manufactured in the extra fast complementary bipolar (XFCB)
process. The AD823A can operate from a single supply of 3 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 20 mV of each rail for IOUT ≤ 100 μA, providing
outstanding output dynamic range. It also has a linear output
current of 40 mA, 0.5 V from the supply rails.
An offset voltage of 700 μV maximum, an offset voltage drift of
1 μV/°C, and typical input bias currents of 0.3 pA provide dc
precision with source impedances up to 1 GΩ. The AD823A
provides 17 MHz, −3 dB bandwidth, and a 30 V/μs slew rate with
a low supply current of only 2.6 mA per amplifier. It also provides
low input voltage noise of 14 nV/√Hz and −108 dB SFDR at
20 kHz. The AD823A has low input capacitances (0.6 pF differ-
ential and 1.3 pF common mode) and drives more than 500 pF
of direct capacitive load as a follower. This lets the amplifier
handle a wide range of load conditions.
Rev. B
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
CONNECTION DIAGRAM
OUT1 1
–IN1 2
+IN1 3
–VS 4
AD823A
8 +VS
7 OUT2
6 –IN2
5 +IN2
Figure 1. 8-Lead SOIC
AD823A
OUT1 1
–IN1 2
+IN1 3
–VS 4
8 +VS
7 OUT2
6 –IN2
5 +IN2
TOP VIEW
(Not to Scale)
Figure 2. 8-Lead MSOP
3.0V
VS = 3V
CL = 50pF
G = +1
1.5V
0V
500mV/DIV
200µs/DIV
Figure 3. Output Swing, +VS = +3 V, 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 ADC drivers, high speed active filters,
and other low voltage, high dynamic range systems.
The AD823A is available over the industrial temperature range
of −40°C to +85°C and is offered in an 8-lead SOIC package and
an 8-lead MSOP package.
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
©2012 Analog Devices, Inc. All rights reserved.
1 page  
Data Sheet
AD823A
±15 V OPERATION
TA = 25°C, VS = ±15 V, RL = 2 kΩ to 0 V, unless otherwise noted.
Table 3.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
Full Power Response
Slew Rate
Settling Time
To 0.1%
To 0.01%
NOISE/DISTORTION PERFORMANCE
Input Voltage Noise
Input Current Noise
Harmonic Distortion (SFDR)
Crosstalk
f = 1 kHz
f = 1 MHz
DC PERFORMANCE
Initial Offset
Maximum Offset over Temperature
Offset Drift
Input Bias Current
At TMAX
Input Offset Current
At TMAX
Open-Loop Gain
TMIN to TMAX
INPUT CHARACTERISTICS
Input Common-Mode Voltage Range
Input Resistance
Input Capacitance
Common-Mode Rejection Ratio
OUTPUT CHARACTERISTICS
Output Voltage Swing
IL = ±100 µA
IL = ±2 mA
IL = ±10 mA
Linear Output Current
Short-Circuit Current
Capacitive Load Drive
POWER SUPPLY
Operating Range
Quiescent Current
Power Supply Rejection Ratio
Conditions
G = +1, VOUT ≤ 0.2 V p-p
VOUT = 2 V p-p
G = −1, VOUT = 10 V step
G = −1, VOUT = 10 V step
G = −1, VOUT = 10 V step
f = 10 kHz
f = 1 kHz
VOUT = 10 V p-p, f = 20 kHz, G = −1, RF = RG =
4 kΩ
VOUT = 10 V p-p, f = 20 kHz, G = +1, RL = 600 Ω
RL = 5 kΩ
RL = 5 kΩ
VCM = 0 V
VCM = −10 V
VCM = 0 V
VOUT = +10 V to −10 V, RL = 2 kΩ
Differential Mode
Common Mode
VCM = −15 V to +13 V
VOUT = −14.5 V to +14.5 V
Sourcing to 0 V
Sinking to 0 V
G = +1
TMIN to TMAX, total
VS = 5 V to 15 V, TMIN to TMAX
Min Typ
16.5 19
5.6
31 35
380
510
13
1
−101
−89
−123
−77
0.8
1.0
1
1.3
3.5
55
1.3
9.5
100 450
80
−15.2 to +13
70
−15.2 to +13.8
1013
0.6
1.3
90
Max Unit
MHz
MHz
V/µs
ns
ns
nV/√Hz
fA/√Hz
dBc
dBc
dB
dB
3.5 mV
5 mV
µV/°C
25 pA
pA
95 pA
20 pA
pA
V/mV
V/mV
V
Ω
pF
pF
dB
−14.9 to +14.96
−14.97 to +14.96
−14.91 to +14.89
44
78
124
500
V
V
V
mA
mA
mA
pF
3
6.3
70 94
36 V
8.4 mA
dB
Rev.B | Page 5 of 20
5 Page 
Data Sheet
8
7
6
5
+125°C
+25°C
–55°C
4
3
2
1
0
0 2 4 6 8 10 12 14 16 18 20
SUPPLY VOLTAGE (±V)
Figure 25. Quiescent Current vs. Supply Voltage
100
90
80
70
60
50
40
30
20
10
0
100
–PSRR
1k
+PSRR
10k 100k
FREQUENCY (Hz)
+VS = 5V
1M 10M
Figure 26. Power Supply Rejection Ratio vs. Frequency
30
RL = 2kΩ
G = +1
25
20
VS = ±15V,
VIN = –15.2V TO +13.8V
15
10
5 VS = +5V, VIN = –0.2V TO +3.8V
VS = +3V, VIN = –0.2V TO +1.5V
0
10k 100k
1M
FREQUENCY (Hz)
Figure 27. Large Signal Frequency Response
10M
AD823A
16
+VS = +5V
14
12
VIN RS
CL
10
8
Φm = 45°
6
4
2 Φm = 20°
0
0 1 2 3 4 5 6 7 8 9 10
CAPACITANCE (pF × 1000)
Figure 28. Series Resistance vs. Capacitive Load
–60
VS = +5V
GAIN = +1
–70 RL = 2kΩ
–80
–90
–100
–110
–120
–130
1k
10k 100k 1M
FREQUENCY (Hz)
Figure 29. Crosstalk vs. Frequency
10M
VS = 3V
G = –1
VOUT = 2.9V p-p
3V
1.5V
0V
500mV/DIV
10µs/DIV
Figure 30. Output Swing, +VS = ±1.5 V, G = −1
Rev.B | Page 11 of 20
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AD823A.PDF ] | |
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