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PDF AD8295 Data sheet ( Hoja de datos )
| Número de pieza | AD8295 | |
| Descripción | Precision Instrumentation Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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1. AD8295 datasheet amplifier  Hay una vista previa y un enlace de descarga de AD8295 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
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Precision Instrumentation Amplifier
with Signal Processing Amplifiers
AD8295
FEATURES
Saves board space
Includes precision in-amp, 2 op amps, and
2 matched resistors
4 mm × 4 mm LFCSP
No heat slug for more routing room
Differential output fully specified
In-amp specifications
Gain set with 1 external resistor (gain range: 1 to 1000)
Input voltage noise: 8 nV/√Hz maximum at 1 kHz
CMRR (G = 1): 90 dB minimum
Input bias current: 0.8 nA maximum
−3 dB bandwidth (G = 1): 1.2 MHz
Slew rate: 2 V/μs
Wide power supply range: ±2.3 V to ±18 V
1 ppm/°C, 0.03% resistor matching
APPLICATIONS
Industrial process controls
Wheatstone bridges
Precision data acquisition systems
Medical instrumentation
Strain gages
Transducer interfaces
Differential output
CONNECTION DIAGRAM
+VS
16
OUT
15
AD8295
–IN 1
A2 +IN
14
A2 –IN
13
12 A2 OUT
A2
RG 2
RG 3
+IN 4
5
–VS
11 A1 +IN
IA
10 A1 R1
R1
A1 20kΩ
R2
20kΩ
9 A1 –IN
6
REF
78
A1 OUT A1 R2
Figure 1.
Table 1. Instrumentation Amplifiers by Category1
General- Zero
Purpose Drift
Military Low
Grade
Power
High Speed
PGA
AD8220 AD8231 AD620
AD8236 AD8250
AD8221 AD8553 AD621
AD627
AD8251
AD8222 AD8555 AD524
AD623
AD8253
www.DataSheet.co.kr
AD8224
AD8556
AD526
AD8223
AD8228 AD8557 AD624
AD8226
AD8295 AD8293
AD8227
1 See www.analog.com for the latest selection of instrumentation amplifiers.
GENERAL DESCRIPTION
The AD8295 contains all the components necessary for a
precision instrumentation amplifier front end in one small
4 mm × 4 mm package. It contains a high performance
instrumentation amplifier, two general-purpose operational
amplifiers, and two precisely matched 20 kΩ resistors.
The AD8295 is designed to make PCB routing easy and
efficient. The AD8295 components are arranged in a logical
way so that typical application circuits have short routes and
few vias. Unlike most chip scale packages, the AD8295 does not
have an exposed metal pad on the back of the part, which frees
additional space for routing and vias. The logical pin arrange-
ment and routing freedom enable the AD8295 to offer simple
pin-strapped solutions for complex systems in the equivalent
board space of a typical MSOP package.
The AD8295 includes a high performance, programmable gain
instrumentation amplifier. Gain is set from 1 to 1000 with a
single resistor. The low noise and excellent common-mode
rejection of the AD8295 enable the part to easily detect small
signals even in the presence of large common-mode interference.
For a similar instrumentation amplifier without the associated
signal conditioning circuitry, see the AD8221 or AD8222 data
sheet.
The AD8295 operates on both single and dual supplies and is
well suited for applications where ±10 V input voltages are
encountered. Performance is specified over the entire industrial
temperature range of −40°C to +85°C for all grades. The
AD8295 is operational from −40°C to +125°C; see the Typical
Performance Characteristics section for expected operation up
to 125°C.
Rev. A
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 ©2008–2009 Analog Devices, Inc. All rights reserved.
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
AD8295
Parameter
INPUT
Input Impedance
Differential
Common Mode
Input Operating Voltage Range1
Over Temperature
Input Operating Voltage Range1
Over Temperature
OUTPUT
Output Swing
Over Temperature
Output Swing
Over Temperature
Short-Circuit Current
Test Conditions
VS = ±2.3 V to ±5 V
TA = −40°C to +85°C
VS = ±5 V to ±18 V
TA = −40°C to +85°C
RL = 10 kΩ
VS = ±2.3 V to ±5 V
TA = −40°C to +85°C
VS = ±5 V to ±18 V
TA = −40°C to +85°C
1 One input grounded; G = 1.
A Grade
B Grade
Min
Typ Max
Min
Typ Max
Unit
−VS + 1.9
−VS + 2.0
−VS + 1.9
−VS + 2.0
100||2
100||2
+VS − 1.1
+VS − 1.2
+VS − 1.2
+VS − 1.2
−VS + 1.9
−VS + 2.0
−VS + 1.9
−VS + 2.0
100||2
100||2
+VS − 1.1
+VS − 1.2
+VS − 1.2
+VS − 1.2
GΩ||pF
GΩ||pF
V
V
V
V
−VS + 1.1
−VS + 1.4
−VS + 1.2
−VS + 1.6
18
+VS − 1.2
+VS − 1.3
+VS − 1.4
+VS − 1.5
−VS + 1.1
−VS + 1.4
−VS + 1.2
−VS + 1.6
18
+VS − 1.2
+VS − 1.3
+VS − 1.4
+VS − 1.5
V
V
V
V
mA
OP AMP SPECIFICATIONS
VS = ±15 V, TA = 25°C, RL = 2 kΩ, unless otherwise noted.
Table 3.
Parameter
INPUT CHARACTERISTICS
Offset Voltage, VOS
Average TC
Input Bias Current1
Input Offset Current
Over Temperature
Input Voltage Range
Open-Loop Gain
Common-Mode Rejection Ratio
(CMRR)
Power Supply Rejection Ratio
(PSRR)
Voltage Noise Density
Voltage Noise
DYNAMIC PERFORMANCE
Gain Bandwidth Product
Slew Rate
OUTPUT CHARACTERISTICS
Output Swing
Over Temperature
Output Swing
Over Temperature
Short-Circuit Current
Test Conditions
TA = −40°C to +85°C
TA = −40°C
TA = +85°C
TA = −40°C to +85°C
f = 0.1 Hz to 10 Hz
VS = ±2.3 V to ±5 V
TA = −40°C to +85°C
VS = ±5 V to ±18 V
TA = −40°C to +85°C
A Grade
Min Typ Max
B Grade
Min Typ Max
Unit
www.DataSheet.co.kr
40
6
10
4
−VS + 1.2
100
100
125
90 110
40
2.2
150
5
10
13
8
0.6
0.6
+VS − 1.2
20
6
10
4
−VS + 1.2
116
100
125
94 110
40
2.2
100
5
10
13
8
0.6
0.6
+VS − 1.2
μV
μV/°C
nA
nA
nA
nA
nA
V
dB
dB
dB
nV/√Hz
μV p-p
1
2 2.6
1
2 2.6
MHz
V/μs
−VS + 1.1
−VS + 1.4
−VS + 1.2
−VS + 1.6
18
+VS − 1.2
+VS − 1.3
+VS − 1.4
+VS − 1.5
−VS + 1.1
−VS + 1.4
−VS + 1.2
−VS + 1.6
18
+VS − 1.2
+VS − 1.3
+VS − 1.4
+VS − 1.5
V
V
V
V
mA
1 Op amp uses an npn input stage, so input bias current always flows into the inputs.
Rev. A | Page 5 of 28
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
180
160
GAIN = 1000
140 GAIN = 100
120 GAIN = 10
100 GAIN = 1
80
60
40
20
0.1 1 10 100 1k 10k 100k 1M
FREQUENCY (Hz)
Figure 15. Negative PSRR vs. Frequency, RTI, G = 1 to 1000
200
150
100
50
0
–50
–100
–150
–200
–40
–20 0
20 40 60 80
TEMPERATURE (°C)
100 120
Figure 16. Gain Error vs. Temperature, G = 1
140
70
60 GAIN = 1000
50
40 GAIN = 100
30
20 GAIN = 10
10
GAIN = 1
0
–10
–20
–30
–40
100
1k 10k 100k 1M
FREQUENCY (Hz)
Figure 17. Gain vs. Frequency, G = 1 to 1000
10M
AD8295
180
170
160
GAIN = 1000
150
140 GAIN = 100
130
120 GAIN = 10
110
100 GAIN = 1
90
80
70
60
50
40
0.1
1
10 100 1k
FREQUENCY (Hz)
10k
Figure 18. CMRR vs. Frequency, RTI, G = 1 to 1000
100k
180
170
160
150 GAIN = 1000
140
130 GAIN = 100
120 GAIN = 10
110
100 GAIN = 1
90
80
www.DataSheet.co.kr
70
60
50
40
0.1 1 10 100 1k 10k 100k
FREQUENCY (Hz)
Figure 19. CMRR vs. Frequency, RTI, 1 kΩ Source Imbalance,
G = 1 to 1000
+VS – 0
–0.4
–0.8
–1.2
–1.6
–2.0
FROM +VS
+2.0
+1.6
+1.2
+0.8
+0.4
–VS + 0
2
FROM –VS
6 10 14
SUPPLY VOLTAGE (V)
18
Figure 20. Input Voltage Limit vs. Supply Voltage, G = 1
Rev. A | Page 11 of 28
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet AD8295.PDF ] | |
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