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PDF AD8253 Data sheet ( Hoja de datos )
| Número de pieza | AD8253 | |
| Descripción | Programmable Gain Instrumentation Amplifier | |
| Fabricantes | Analog Devices | |
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Data Sheet
10 MHz, 20 V/μs, G = 1, 10, 100, 1000 iCMOS
Programmable Gain Instrumentation Amplifier
AD8253
FEATURES
Small package: 10-lead MSOP
Programmable gains: 1, 10, 100, 1000
Digital or pin-programmable gain setting
Wide supply: ±5 V to ±15 V
Excellent dc performance
High CMRR: 100 dB (minimum), G = 100
Low gain drift: 10 ppm/°C (maximum)
Low offset drift: 1.2 μV/°C (maximum), G = 1000
Excellent ac performance
Fast settling time: 780 ns to 0.001% (maximum)
High slew rate: 20 V/μs (minimum)
Low distortion: −110 dB THD at 1 kHz,10 V swing
High CMRR over frequency: 100 dB to 20 kHz (minimum)
Low noise: 10 nV/√Hz, G = 1000 (maximum)
Low power: 4 mA
APPLICATIONS
Data acquisition
Biomedical analysis
Test and measurement
GENERAL DESCRIPTION
The AD8253 is an instrumentation amplifier with digitally
programmable gains that has gigaohm (GΩ) input impedance,
low output noise, and low distortion, making it suitable for
interfacing with sensors and driving high sample rate analog-to-
digital converters (ADCs).
It has a high bandwidth of 10 MHz, low THD of −110 dB, and
fast settling time of 780 ns (maximum) to 0.001%. Offset drift and
gain drift are guaranteed to 1.2 μV/°C and 10 ppm/°C, respectively,
for G = 1000. In addition to its wide input common voltage range,
it boasts a high common-mode rejection of 100 dB at G = 1000
from dc to 20 kHz. The combination of precision dc performance
coupled with high speed capabilities makes the AD8253 an
excellent candidate for data acquisition. Furthermore, this
monolithic solution simplifies design and manufacturing and
boosts performance of instrumentation by maintaining a tight
match of internal resistors and amplifiers.
The AD8253 user interface consists of a parallel port that allows
users to set the gain in one of two different ways (see Figure 1
for the functional block diagram). A 2-bit word sent via a bus
can be latched using the WR input. An alternative is to use
transparent gain mode, where the state of logic levels at the gain
port determines the gain.
FUNCTIONAL BLOCK DIAGRAM
DGND WR A1 A0
26
54
–IN 1
LOGIC
7 OUT
+IN 10
AD8253
8
+VS
80
3
–VS
Figure 1.
9
REF
70
G = 1000
60
50
G = 100
40
30
G = 10
20
10
G=1
0
–10
–20
1k
10k 100k 1M 10M
FREQUENCY (Hz)
Figure 2. Gain vs. Frequency
100M
Table 1. Instrumentation Amplifiers by Category
General Zero
Purpose Drift
Mil Low
Grade Power
High Speed
PGA
AD82201 AD82311 AD620 AD6271 AD8250
AD8221 AD85531 AD621 AD6231 AD8251
AD8222 AD85551 AD524 AD82231 AD8253
AD82241 AD85561 AD526
AD8228 AD85571 AD624
1 Rail-to-rail output.
The AD8253 is available in a 10-lead MSOP package and is
specified over the −40°C to +85°C temperature range, making it
an excellent solution for applications where size and packing
density are important considerations.
Rev. B
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 ©2008–2012 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD8253
Parameter
Settling Time 0.001%
G=1
G = 10
G =100
G = 1000
Slew Rate
G=1
G = 10
G = 100
G = 1000
Total Harmonic Distortion + Noise
GAIN
Gain Range
Gain Error
G=1
G = 10, 100, 1000
Gain Nonlinearity
G=1
G = 10
G = 100
G = 1000
Gain vs. Temperature
INPUT
Input Impedance
Differential
Common Mode
Input Operating Voltage Range
Over Temperature3
OUTPUT
Output Swing
Over Temperature4
Short-Circuit Current
REFERENCE INPUT
RIN
IIN
Voltage Range
Gain to Output
DIGITAL LOGIC
Digital Ground Voltage, DGND
Digital Input Voltage Low
Digital Input Voltage High
Digital Input Current
Gain Switching Time5
tSU
tHD
t WR -LOW
t WR -HIGH
Conditions
ΔOUT = 10 V step
Min
f = 1 kHz, RL = 10 kΩ, ±10 V,
G = 1, 10 Hz to 22 kHz band-
pass filter
20
20
12
2
G = 1, 10, 100, 1000
OUT = ±10 V
1
OUT = −10 V to +10 V
RL = 10 kΩ, 2 kΩ, 600 Ω
RL = 10 kΩ, 2 kΩ, 600 Ω
RL = 10 kΩ, 2 kΩ, 600 Ω
RL = 10 kΩ, 2 kΩ, 600 Ω
All gains
Typ
−110
3
Data Sheet
Max Unit
780 ns
880 ns
1.8 μs
1.8 μs
V/μs
V/μs
V/μs
V/μs
dB
1000
0.03
0.04
5
3
18
110
10
V/V
%
%
ppm
ppm
ppm
ppm
ppm/°C
VS = ±5 V to ±15 V
T = −40°C to +85°C
−VS + 1
−VS + 1.2
4||1.25
1||5
+VS − 1.5
+VS − 1.7
T = −40°C to +85°C
−13.7
−13.7
37
+13.6
+13.6
+IN, −IN, REF = 0
20
1
−VS +VS
1 ± 0.0001
Referred to GND
Referred to GND
Referred to GND
−VS + 4.25
DGND
2.8
0
1
See Figure 3 timing diagram
15
30
20
15
+VS − 2.7
2.1
+VS
325
GΩpF
GΩpF
V
V
V
V
mA
kΩ
μA
V
V/V
V
V
V
μA
ns
ns
ns
ns
ns
Rev. B | Page 4 of 24
5 Page 
AD8253
20 12.0
10
IB+
0
IB–
–10
10.5
9.0
7.5
–20 6.0
–30
IOS
–40
4.5
3.0
–50 1.5
–60
–15
–10 –5
0
5
COMMON-MODE VOLTAGE (V)
10
0
15
Figure 18. Input Bias Current and Offset Current vs. Common-Mode Voltage
30
25
20
15
10
IB–
5
IB+
0
–5 IOS
–10
–60 –40 –20
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
Figure 19. Input Bias Current and Offset Current vs. Temperature
120
100
80
60
40
20
0
10
G = 1000
G = 100
G=1
G = 10
100 1k 10k 100k
FREQUENCY (Hz)
Figure 20. CMRR vs. Frequency
1M
Data Sheet
120
100
G = 1000
80
G = 100
60
G = 10
40
20 G = 1
0
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
Figure 21. CMRR vs. Frequency, 1 kΩ Source Imbalance
15
10
5
0
–5
–10
–15
–50
–30 –10 10 30 50 70 90
TEMPERATURE (°C)
Figure 22. CMRR vs. Temperature, G = 1
110
130
80
70
G = 1000
60
50
G = 100
40
30
G = 10
20
10
G=1
0
–10
–20
1k
10k 100k 1M 10M
FREQUENCY (Hz)
Figure 23. Gain vs. Frequency
100M
Rev. B | Page 10 of 24
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet AD8253.PDF ] | |
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