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PDF AD824 Data sheet ( Hoja de datos )
| Número de pieza | AD824 | |
| Descripción | FET-Input Op Amp | |
| Fabricantes | Analog Devices | |
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Data Sheet
FEATURES
Single supply operation: 3 V to 30 V
Very low input bias current: 2 pA
Wide input voltage range
Rail-to-rail output swing
Low supply current per amplifier: 500 µA
Wide bandwidth: 2 MHz
Slew rate: 2 V/µs
No phase reversal
APPLICATIONS
Photo diode preamplifier
Battery powered instrumentation
Power supply control and protection
Medical instrumentation
Remote sensors
Low voltage strain gage amplifiers
DAC output amplifier
GENERAL DESCRIPTION
The AD824 is a quad, FET input, single supply amplifier,
featuring rail-to-rail outputs. The combination of FET inputs
and rail-to-rail outputs makes the AD824 useful in a wide
variety of low voltage applications where low input current is
a primary consideration.
The AD824 is guaranteed to operate from a 3 V single supply
up to ±15 V dual supplies. AD824AR-3V parametric
performance at 3 V is fully guaranteed.
Fabricated on Analog Devices, Inc., complementary bipolar
process, the AD824 has a unique input stage that allows the
input voltage to safely extend beyond the negative supply and
to the positive supply without any phase inversion or latch-up.
The output voltage swings to within 15 mV of the supplies.
Capacitive loads to 350 pF can be handled without oscillation.
Single Supply, Rail-to-Rail
Low Power, FET-Input Op Amp
AD824
PIN CONFIGURATION
OUT A 1
14 OUT D
–IN A 2
+IN A 3
V+ 4
13 –IN D
AD824 12 +IN D
TOP VIEW
(Not to Scale) 11 V–
+IN B 5
10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
Figure 1. 14-Lead SOIC (R Suffix)
The FET input combined with laser trimming provides an input
that has extremely low bias currents with guaranteed offsets
below 1 mV. This enables high accuracy designs even with high
source impedances. Precision is combined with low noise,
making the AD824 ideal for use in battery powered medical
equipment.
Applications for the AD824 include portable medical
equipment, photo diode preamplifiers, and high impedance
transducer amplifiers.
The ability of the output to swing rail-to-rail enables designers
to build multistage filters in single supply systems and maintain
high signal-to-noise ratios.
The AD824 is specified over the extended industrial (−40°C to
+85°C) temperature range and is available in narrow 14-lead
SOIC package.
Rev. E
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD824
At VS = ±15.0 V, VOUT = 0 V, TA = 25°C; unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage (AD824A)
Symbol
VOS
Input Bias Current
IB
Input Offset Current
IB
IOS
Input Voltage Range
Common-Mode Rejection Ratio
CMRR
Input Impedance
Large Signal Voltage Gain
AVO
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
ΔVOS/ΔT
VOH
Output Voltage Low
VOL
Short Circuit Limit
Open-Loop Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Full-Power Bandwidth
Settling Time
Gain Bandwidth Product
Phase Margin
Channel Separation
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
Total Harmonic Distortion
ISC
ZOUT
PSRR
ISY
SR
BWP
tS
GBP
φo
CS
en p-p
en
in
THD
Test Conditions/Comments
TMIN to TMAX
VCM = 0 V
TMIN to TMAX
VCM = −10 V
TMIN to TMAX
VCM = −15 V to 13 V
TMIN to TMAX
VO = −10 V to +10 V;
RL = 2 kΩ
RL = 10 kΩ
RL = 100 kΩ
TMIN to TMAX, RL = 100 kΩ
ISOURCE = 20 µA
TMIN to TMAX
ISOURCE = 2.5 mA
TMIN to TMAX
ISINK = 20 µA
TMIN to TMAX
ISINK = 2.5 mA
TMIN to TMAX
Sink/source, TMIN to TMAX
f = 1 MHz, AV = 1
VS = 2.7 V to 15 V
TMIN to TMAX
VO = 0 V
TMIN to TMAX
RL = 10 kΩ, AV = 1
1% distortion, VO = 20 V p-p
VOUT = 0 V to 10 V, to 0.01%
f = 1 kHz, RL = 2 kΩ
0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
f =10 kHz, VO = 3 V rms, RL = 10 kΩ
Data Sheet
Min Typ
Max Unit
0.5 2.5 mV
0.6 4.0 mV
4 35 pA
500
4000
pA
25 pA
3 20 pA
500 pA
−15 +13 V
70 80
dB
66 dB
1013||3.3
Ω||pF
12 50
50 200
300 2000
200 1000
2
V/mV
V/mV
V/mV
V/mV
µV/°C
14.975
14.970
14.80
14.75
±8
14.988
14.985
14.85
14.82
–14.985
–14.98
–14.88
–14.86
±20
100
–14.975
–14.97
–14.85
–14.8
V
V
V
V
V
V
V
V
mA
Ω
70 80
68
560
dB
dB
625 µA
675 µA
2
33
6
2
50
–123
V/µs
kHz
µs
MHz
Degrees
dB
2
16
1.1
0.005
µV p-p
nV/√Hz
fA/√Hz
%
Rev. E | Page 4 of 16
5 Page 
AD824
120
100
80
60
40
20
0
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
Figure 18. Common-Mode Rejection vs. Frequency
10M
–40
–60
–80
–100
–120
100
1k 10k
FREQUENCY (Hz)
Figure 19. THD vs. Frequency, 3 V rms
100k
100 100
80 80
60 60
±15V
40 40
3V, 0V
20 20
00
–20
10
–20
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 20. Open-Loop Gain and Phase vs. Frequency
Data Sheet
1k
100
10
1
1 10 100 1k 10k 100k
FREQUENCY (Hz)
Figure 21. Input Voltage Noise Spectral Density vs. Frequency
120
100
80
60
40
20
0
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 22. Power Supply Rejection vs. Frequency
30
25
20
15
10
5
0
1k
3k
10k
30k
100k
300k
INPUT FREQUENCY (Hz)
Figure 23. Large Signal Frequency Response
1M
Rev. E | Page 10 of 16
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AD824.PDF ] | |
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