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PDF AD623 Data sheet ( Hoja de datos )
| Número de pieza | AD623 | |
| Descripción | Low Cost Instrumentation Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
Single and Dual-Supply, Rail-to-Rail,
Low Cost Instrumentation Amplifier
AD623
FEATURES
Easy to use
Rail-to-rail output swing
Input voltage range extends 150 mV below ground
(single supply)
Low power, 550 μA maximum supply current
Gain set with one external resistor
Gain range: 1 to 1000
High accuracy dc performance
0.10% gain accuracy (G = 1)
0.35% gain accuracy (G > 1)
Noise: 35 nV/√Hz RTI noise at 1 kHz
Excellent dynamic specifications
800 kHz bandwidth (G = 1)
20 μs settling time to 0.01% (G = 10)
APPLICATIONS
Low power medical instrumentation
Transducer interfaces
Thermocouple amplifiers
Industrial process controls
Difference amplifiers
Low power data acquisition
GENERAL DESCRIPTION
The AD623 is an integrated, single- or dual-supply instrumentation
amplifier that delivers rail-to-rail output swing using supply
voltages from 3 V to 12 V. The AD623 offers superior user
flexibility by allowing single gain set resistor programming and by
conforming to the 8-lead industry standard pinout configuration.
With no external resistor, the AD623 is configured for unity
gain (G = 1), and with an external resistor, the AD623 can be
programmed for gains of up to 1000.
The superior accuracy of the AD623 is the result of increasing
ac common-mode rejection ratio (CMRR) coincident with
increasing gain; line noise harmonics are rejected due to
constant CMRR up to 200 Hz. The AD623 has a wide input
common-mode range and amplifies signals with common-
mode voltages as low as 150 mV below ground. The AD623
maintains superior performance with dual and single polarity
power supplies.
Table 1. Low Power Upgrades for the AD623
Part No.
Total VS (V dc)
Typical IQ (μA)
AD8235
5.5
30
AD8236
5.5
33
AD8237
5.5
33
AD8226
36
350
AD8227
36
325
AD8420
36
85
AD8422
36
300
AD8426
36
325 (per channel)
2
–IN
VDIFF –
2+
VCM
VDIFF –
2+
+IN
3
FUNCTIONAL BLOCK DIAGRAM
+VS
7
50kΩ 50kΩ
A1
–RG
RG
1
8
50kΩ
50kΩ
A3
+RG
4
–VS
50kΩ 50kΩ
A2
Figure 1.
6
OUTPUT
5
REF
Rev. E
Document Feedback
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©1997–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD623
Data Sheet
Parameter
Common-Mode Rejection
at 60 Hz with 1 kΩ
Source Imbalance
G=1
G = 10
G = 100
G = 1000
OUTPUT
Output Swing
Test Conditions/
Comments
VCM = 0 V to 3 V
VCM = 0 V to 3 V
VCM = 0 V to 3 V
VCM = 0 V to 3 V
RL = 10 kΩ
RL = 100 kΩ
DYNAMIC RESPONSE
Small Signal −3 dB BW
G=1
G = 10
G = 100
G = 1000
Slew Rate
Settling Time to 0.01%
G=1
G = 10
VS = 5 V
Step size: 3.5 V
Step size: 4 V,
VCM = 1.8 V
1 Does not include effects of external resistor, RG.
2 One input grounded. G = 1.
AD623A
Min Typ Max
AD623ARM
Min Typ Max
Min
70 80
90 100
105 110
105 110
70 80
90 100
105 110
105 110
77
94
105
105
0.01 (+VS) − 0.01 (+VS) − 0.01
0.5 0.5
0.01 (+VS) − 0.01 (+VS) − 0.01
0.15 0.15
800 800
100 100
10 10
22
0.3 0.3
30 30
20 20
AD623B
Typ Max
Unit
86 dB
100 dB
110 dB
110 dB
(+VS) −
0.5
(+VS) −
0.15
V
V
800 kHz
100 kHz
10 kHz
2 kHz
0.3 V/μs
30 μs
20 μs
Rev. E | Page 4 of 26
5 Page 
AD623
TYPICAL PERFORMANCE CHARACTERISTICS
At 25°C, VS = ±5 V, and RL = 10 kΩ, unless otherwise noted.
300
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0
–100 –80 –60 –40 –20 0 20 40 60 80 100 120 140
INPUT OFFSET VOLTAGE (µV)
Figure 3. Typical Distribution of Input Offset Voltage,
N-8 and R-8 Package Options
480
420
360
300
240
180
120
60
0
–800 –600 –400 –200 0
200 400 600 800
OUTPUT OFFSET VOLTAGE (µV)
Figure 4. Typical Distribution of Output Offset Voltage,
N-8 and R-8 Package Options
22
20
18
16
14
12
10
8
6
4
2
0
–80 –60 –40 –20 0 20 40 60 80 100
INPUT OFFSET VOLTAGE (µV)
Figure 5. Typical Distribution of Input Offset Voltage,
+VS = 5 V, −VS = 0 V, VREF = −0.125 V, N-8 and R-8 Package Options
Data Sheet
22
20
18
16
14
12
10
8
6
4
2
0
–600 –500 –400 –300 –200 –100 0 100 200 300 400 500
OUTPUT OFFSET VOLTAGE (µV)
Figure 6. Typical Distribution of Output Offset Voltage,
+VS = 5 V, −VS = 0 V, VREF = −0.125 V, N-8 and R-8 Package Options
210
180
150
120
90
60
30
0
–0.245 –0.240 –0.235 –0.230 –0.225 –0.220 –0.215 –0.210
INPUT OFFSET CURRENT (nA)
Figure 7. Typical Distribution for Input Offset Current,
N-8 and R-8 Package Options
20
18
16
14
12
10
8
6
4
2
0
–0.025 –0.020 –0.015 –0.010 –0.005
0
0.005
INPUT OFFSET CURRENT (nA)
0.010
Figure 8. Typical Distribution for Input Offset Current,
+VS = 5 V, −VS = 0 V, VREF = −0.125 V, N-8 and R-8 Package Options
Rev. E | Page 10 of 26
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet AD623.PDF ] | |
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