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PDF AD627 Data sheet ( Hoja de datos )
| Número de pieza | AD627 | |
| Descripción | Rail-to-Rail Instrumentation Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
Micropower, Single- and Dual-Supply,
Rail-to-Rail Instrumentation Amplifier
AD627
FEATURES
Micropower, 85 μA maximum supply current
Wide power supply range (+2.2 V to ±18 V)
Easy to use
Gain set with one external resistor
Gain range 5 (no resistor) to 1000
Higher performance than discrete designs
Rail-to-rail output swing
High accuracy dc performance
0.03% typical gain accuracy (G = +5) (AD627A)
10 ppm/°C typical gain drift (G = +5)
125 μV maximum input offset voltage (AD627B dual supply)
200 μV maximum input offset voltage (AD627A dual supply)
1 μV/°C maximum input offset voltage drift (AD627B)
3 μV/°C maximum input offset voltage drift (AD627A)
10 nA maximum input bias current
Noise: 38 nV/√Hz RTI noise at 1 kHz (G = +100)
Excellent ac specifications
AD627A: 77 dB minimum CMRR (G = +5)
AD627B: 83 dB minimum CMRR (G = +5)
80 kHz bandwidth (G = +5)
135 μs settling time to 0.01% (G = +5, 5 V step)
APPLICATIONS
4 mA to 20 mA loop-powered applications
Low power medical instrumentation—ECG, EEG
Transducer interfacing
Thermocouple amplifiers
Industrial process controls
Low power data acquisition
Portable battery-powered instruments
GENERAL DESCRIPTION
The AD627 is an integrated, micropower instrumentation
amplifier that delivers rail-to-rail output swing on single and
dual (+2.2 V to ±18 V) supplies. The AD627 provides excellent
ac and dc specifications while operating at only 85 μA maximum.
The AD627 offers superior flexibility by allowing the user to set
the gain of the device with a single external resistor while con-
forming to the 8-lead industry-standard pinout configuration.
With no external resistor, the AD627 is configured for a gain of 5.
With an external resistor, it can be set to a gain of up to 1000.
A wide supply voltage range (+2.2 V to ±18 V) and micropower
current consumption make the AD627 a perfect fit for a wide
range of applications. Single-supply operation, low power
consumption, and rail-to-rail output swing make the AD627
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.
FUNCTIONAL BLOCK DIAGRAM
RG 1
AD627
8 RG
–IN 2
7 +VS
+IN 3
6 OUTPUT
–VS 4
5 REF
Figure 1. 8-Lead PDIP (N) and SOIC_N (R)
100
90
80
AD627
70
60
50
TRADITIONAL
40 LOW POWER
DISCRETE DESIGN
30
20
10
0
1 10 100 1k 10k
FREQUENCY (Hz)
Figure 2. CMRR vs. Frequency, ±5 VS, Gain = +5
ideal for battery-powered applications. Its rail-to-rail output
stage maximizes dynamic range when operating from low
supply voltages. Dual-supply operation (±15 V) and low power
consumption make the AD627 ideal for industrial applications,
including 4 mA to 20 mA loop-powered systems.
The AD627 does not compromise performance, unlike other
micropower instrumentation amplifiers. Low voltage offset,
offset drift, gain error, and gain drift minimize errors in the
system. The AD627 also minimizes errors over frequency by
providing excellent CMRR over frequency. Because the CMRR
remains high up to 200 Hz, line noise and line harmonics are
rejected.
The AD627 provides superior performance, uses less circuit
board area, and costs less than micropower discrete designs.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2007−2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD627
Data Sheet
Parameter
DYNAMIC RESPONSE
Small Signal −3 dB
Bandwidth
G = +5
G = +100
G = +1000
Slew Rate
Settling Time to 0.01%
G = +5
G = +100
Settling Time to 0.01%
G = +5
G = +100
Overload Recovery
Conditions
VS = 3 V, 1.5 V output step
VS = 5 V, 2.5 V output step
50% input overload
Min
AD627A
Typ
Max
80
3
0.4
+0.05/−0.07
65
290
85
330
3
AD627B
Min Typ Max
+0.05/−0.07
80
3
0.4
65
290
85
330
3
1 Does not include effects of External Resistor RG.
2 See Table 8 for total RTI errors.
3 See the Using the AD627 section for more information on the input range, gain range, and common-mode range.
Unit
kHz
kHz
kHz
V/µs
µs
µs
µs
µs
µs
Rev. E | Page 4 of 24
5 Page 
AD627
500mV
100
1s
10
Figure 11. 0.1 Hz to 10 Hz Current Noise (0.71 pA/DIV)
20mV
100
11ss
10
Figure 12. 0.1 Hz to 10 Hz RTI Voltage Noise (400 nV/DIV), G = +5
2V
100
1s
10
Figure 13. 0.1 Hz to 10 Hz RTI Voltage Noise (200 nV/DIV), G = +1000
Data Sheet
120
110
100
90
80
70
60
50
40
30
20
10
G = +1000
G = +100
G = +5
100 1k
FREQUENCY (Hz)
10k
Figure 14. Positive PSRR vs. Frequency, ±5 V
100k
100
90
80
70
60
50
40
30
20
10
0
10
G = +1000
G = +100
G = +5
100 1k
FREQUENCY (Hz)
10k
Figure 15. Negative PSRR vs. Frequency, ±5 V
100k
120
110
100
G = +1000
90
80 G = +100
70
60 G = +5
50
40
30
20
10
100 1k
FREQUENCY (Hz)
10k
100k
Figure 16. Positive PSRR vs. Frequency (VS = 5 V, 0 V)
Rev. E | Page 10 of 24
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet AD627.PDF ] | |
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