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PDF AD8227 Data sheet ( Hoja de datos )
| Número de pieza | AD8227 | |
| Descripción | Rail-to-Rail Output Instrumentation Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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FEATURES
Gain set with 1 external resistor
Gain range: 5 to 1000
Input voltage goes below ground
Inputs protected beyond supplies
Very wide power supply range
Single supply: 2.2 V to 36 V
Dual supply: ±1.5 V to ±18 V
Bandwidth (G = 5): 250 kHz
CMRR (G = 5): 100 dB minimum (B Grade)
Input noise: 24 nV/√Hz
Typical supply current: 350 μA
Specified temperature: −40°C to +125°C
8-lead SOIC and MSOP packages
APPLICATIONS
Industrial process controls
Bridge amplifiers
Medical instrumentation
Portable data acquisition
Multichannel systems
Wide Supply Range, Rail-to-Rail
Output Instrumentation Amplifier
AD8227
PIN CONFIGURATION
–IN 1
RG 2
RG 3
+IN 4
AD8227
TOP VIEW
(Not to Scale)
Figure 1.
8 +VS
7 VOUT
6 REF
5 –VS
Table 1. Instrumentation Amplifiers by Category1
General Zero
Purpose Drift
Military Low
Grade
Power
High Speed
PGA
AD8220 AD8231 AD620
AD627
AD8250
AD8221 AD8290 AD621
AD623
AD8251
AD8222 AD8293 AD524
AD8223 AD8253
AD8224 AD8553 AD526
AD8226
AD8228 AD8556 AD624
AD8227
AD8295 AD8557
1 See www.analog.com for the latest selection of instrumentation amplifiers.
GENERAL DESCRIPTION
The AD8227 is a low cost, wide supply range instrumentation
amplifier that requires only one external resistor to set any gain
between 5 and 1000.
The AD8227 is designed to work with a variety of signal voltages.
A wide input range and rail-to-rail output allow the signal to
make full use of the supply rails. Because the input range can
also go below the negative supply, small signals near ground can
be amplified without requiring dual supplies. The AD8227
operates on supplies ranging from ±1.5 V to ±18 V (2.2 V to
36 V single supply).
The robust AD8227 inputs are designed to connect to real-
world sensors. In addition to its wide operating range, the
AD8227 can handle voltages beyond the rails. For example,
with a ±5 V supply, the part is guaranteed to withstand ±35 V
at the input with no damage. Minimum as well as maximum
input bias currents are specified to facilitate open wire detection.
The AD8227 is ideal for multichannel, space-constrained
applications. With its MSOP package and 125°C temperature
rating, the AD8227 thrives in tightly packed, zero airflow designs.
The AD8227 is available in 8-pin MSOP and SOIC packages.
It is fully specified for −40°C to +125°C operation.
For a similar instrumentation amplifier with a gain range of 1 to
1000, see the AD8226.
Rev. 0
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
www.analog.com
Fax: 781.461.3113
©2009 Analog Devices, Inc. All rights reserved.
1 page  
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AD8227
+VS = 2.7 V, −VS = 0 V, VREF = 0 V, TA = 25°C, G = 5, RL = 10 kΩ, specifications referred to input, unless otherwise noted.
Table 3.
Parameter
COMMON-MODE REJECTION RATIO
DC to 60 Hz
G=5
G = 10
G = 100
G = 1000
5 kHz
G=5
G = 10
G = 100
G = 1000
NOISE
Voltage Noise, 1 kHz
Input Voltage Noise, eNI
Output Voltage Noise, eNO
RTI
G=5
G = 10
G = 100 to 1000
Current Noise
VOLTAGE OFFSET
Input Offset, VOSI
Average Temperature Drift
Output Offset, VOSO
Average Temperature Drift
Offset RTI vs. Supply (PSR)
G=5
G = 10
G = 100
G = 1000
INPUT CURRENT
Input Bias Current1
Average Temperature Drift
Input Offset Current
Average Temperature Drift
REFERENCE INPUT
RIN
IIN
Voltage Range
Reference Gain to Output
Reference Gain Error
Test Conditions/
Comments
VCM = 0 V to 1.7 V
Total noise:
eN = √(eNI2 + (eNO/G)2)
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 0.1 Hz to 10 Hz
Total offset voltage:
VOS = VOSI + (VOSO/G)
VS = 0 V to 1.7 V
TA = −40°C to +125°C
VS = 0 V to 1.7 V
TA = −40°C to +125°C
VS = 0 V to 1.7 V
TA = +25°C
TA = +125°C
TA = −40°C
TA = −40°C to +125°C
TA = +25°C
TA = +125°C
TA = −40°C
TA = −40°C to +125°C
A Grade
Min Typ Max
90
96
105
105
80
86
86
86
25 28
310 330
1.5
0.8
0.5
100
3
200
0.2 2
1000
2 10
90
96
105
105
5 20 27
5 15 25
5 30 35
70
1.5
1.5
2
5
60
12
−VS +VS
1
0.01
B Grade
Min Typ Max
100
105
110
110
80
86
86
86
25 28
310 330
1.5
0.8
0.5
100
3
100
0.2 1
500
25
100
105
110
110
5 20 27
5 15 25
5 30 35
70
1.5
1.5
2
5
60
12
−VS +VS
1
0.01
Unit
dB
dB
dB
dB
dB
dB
dB
dB
nV/√Hz
nV/√Hz
μV p-p
μV p-p
μV p-p
fA/√Hz
pA p-p
μV
μV/°C
μV
μV/°C
dB
dB
dB
dB
nA
nA
nA
pA/°C
nA
nA
nA
pA/°C
kΩ
μA
V
V/V
%
Rev. 0 | Page 5 of 24
5 Page 
www.DataSheet4U.com
20
15 –14.96V, +12.7V
10
–11.96V,
+10V
5
0V, +14.2V
0V, +11.2V
VS = ±15V
+14.94V, +12.7V
+11.94V,
+10V
0 VS = ±12V
–5
–11.96V,
–10 –11.1V
+11.94V,
–11.1V
–15
–14.96V, –13.8V
–20
–20 –15 –10
0V, –12.3V
0V, –15.3V
–5 0
5
OUTPUT VOLTAGE (V)
+14.94V, –13.8V
10 15 20
Figure 15. Input Common-Mode Voltage vs. Output Voltage,
Dual Supply, Vs = ±15 V, G = 5
20
15 –14.96V, +12.7V
10 –11.96V,
+10V
5
0V, +14.2V
0V, +11.2V
VS = ±15V
+14.94V, +12.7V
+11.94V,
+10V
0 VS = ±12V
–5
–11.96V,
–10 –11.3V
+11.94V,
–11.3V
–15
–14.96V, –14V
–20
–20 –15 –10
0V, –12.3V
0V, –15.3V
–5 0
5
OUTPUT VOLTAGE (V)
+14.94V, –14V
10 15 20
Figure 16. Input Common-Mode Voltage vs. Output Voltage,
Dual Supply, Vs = ±15 V, G = 100
3.00
2.75 VS = 2.7V, G = 5
0.6
0.5
2.50
2.25
VOUT
0.4
0.3
2.00
0.2
1.75
0.1
1.50
1.25
IIN
0
–0.1
1.00
–0.2
0.75
–0.3
0.50
–0.4
0.25
–0.5
0 –0.6
–40 –35 –30 –25 –20 –15 –10 –5 0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
Figure 17. Input Overvoltage Performance, G = 5, Vs = 2.7 V
AD8227
16
14 VS = ±15V, G = 5
12
10
8
VOUT
0.5
0.4
0.3
6 0.2
4
2 IIN
0
0.1
0
–2
–4 –0.1
–6 –0.2
–8
–10 –0.3
–12 –0.4
–14
–16 –0.5
–40 –35 –30 –25 –20 –15 –10 –5 0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
Figure 18. Input Overvoltage Performance, G = 5, Vs = ±15 V
3.00
2.75
2.50
VS = 2.7V, G = 100
VOUT
0.6
0.5
0.4
2.25
0.3
2.00
0.2
1.75
0.1
1.50
1.25
IIN
0
–0.1
1.00
0.75
–0.2
–0.3
0.50
–0.4
0.25
–0.5
0 –0.6
–40 –35 –30 –25 –20 –15 –10 –5 0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
Figure 19. Input Overvoltage Performance, G = 100, Vs = 2.7 V
16
14 VS = ±15V, G = 100
12
0.5
0.4
10
8
VOUT
6
0.3
0.2
4 0.1
2
0
–2
IIN
–4
0
–0.1
–6 –0.2
–8
–10 –0.3
–12 –0.4
–14
–16 –0.5
–40 –35 –30 –25 –20 –15 –10 –5 0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
Figure 20. Input Overvoltage Performance, G = 100, Vs = ±15 V
Rev. 0 | Page 11 of 24
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet AD8227.PDF ] | |
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