AD8228BRZ-RL Analog Devices Inc, AD8228BRZ-RL Datasheet

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AD8228BRZ-RL

Manufacturer Part Number
AD8228BRZ-RL
Description
IC,Instrumentation Amplifier,SINGLE,SOP,8PIN,PLASTIC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD8228BRZ-RL

Amplifier Type
Instrumentation
Number Of Circuits
1
Slew Rate
2.5 V/µs
-3db Bandwidth
650kHz
Current - Input Bias
400pA
Voltage - Input Offset
50µV
Current - Supply
900µA
Current - Output / Channel
18mA
Voltage - Supply, Single/dual (±)
4.6 V ~ 36 V, ±2.3 V ~ 18 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Output Type
-
Gain Bandwidth Product
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
Easy to use
Pin strappable gains of 10 and 100
Wide power supply range: ±2.3 V to ±18 V
DC specifications (B Grade, G = 10)
AC specifications
Low noise
APPLICATIONS
Weigh scales
Industrial process controls
Bridge amplifiers
Precision data acquisition systems
Medical instrumentation
Strain gages
Transducer interfaces
GENERAL DESCRIPTION
The AD8228 is a high performance instrumentation amplifier
with very high gain accuracy. Because all gain setting resistors
are internal and laser trimmed, gain accuracy and gain drift
are better than can be achieved with typical instrumentation
amplifiers.
Low voltage offset, low offset drift, low gain drift, high gain
accuracy, and high CMRR make this part an excellent choice
in applications that demand the best dc performance possible,
such as bridge signal conditioning.
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.
Trademarks and registered trademarks are the property of their respective owners.
2 ppm/°C gain drift
0.02% gain error
50 μV maximum input offset voltage
0.8 μV/°C maximum input offset drift
0.6 nA maximum input bias current
100 dB CMRR
650 kHz, –3 dB bandwidth (G = 10)
2 V/μs slew rate
8 nV/√Hz, @ 1 kHz (G = 100)
0.3 μV p-p from 0.1 Hz to 10 Hz (G = 100)
Precision Instrumentation Amplifier
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Table 1. Instrumentation Amplifiers by Category
General
Purpose
AD8220
AD8221
AD8222
AD8224
AD8228
1
The AD8228 operates on both single and dual supplies. Because
the part can operate on supplies up to ±18 V, it is well suited for
applications where high common-mode input voltages are
encountered. The AD8228 is available in 8-lead MSOP and
SOIC packages.
Performance is specified over the entire industrial temperature
range of −40°C to +85°C for all grades. Furthermore, the AD8228
is operational from −40°C to +125°C. For a pin-compatible ampli-
fier with similar specifications, but with a gain range of 1 to 1000,
see the AD8221.
Rail-to-rail output.
1
1
Zero
Drift
AD8231
AD8553
AD8555
AD8556
AD8557
CONNECTION DIAGRAM
+IN
–IN
1
1
1
1
1
G1
G2
1
2
3
4
©2008 Analog Devices, Inc. All rights reserved.
Military
Grade
AD620
AD621
AD524
AD526
AD624
(Not to Scale)
AD8228
TOP VIEW
Figure 1.
Low Gain Drift
Low
Power
AD627
AD623
8
7
6
5
+V
V
REF
–V
OUT
S
S
1
1
AD8228
www.analog.com
High Speed
PGA
AD8250
AD8251
AD8253

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AD8228BRZ-RL Summary of contents

Page 1

FEATURES Easy to use Pin strappable gains of 10 and 100 Wide power supply range: ±2 ± specifications (B Grade 10) 2 ppm/°C gain drift 0.02% gain error 50 μV maximum input offset voltage ...

Page 2

AD8228 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Connection Diagram ....................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Gain = 10 ....................................................................................... 3 Gain = 100 ..................................................................................... 5 Absolute Maximum Ratings............................................................ 7 Thermal Resistance ...................................................................... ...

Page 3

SPECIFICATIONS GAIN = ± 25° kΩ, all specifications referred to input, unless otherwise noted. S REF A L Table 2. Conditions Parameter (Gain = 10) COMMON-MODE REJECTION ...

Page 4

AD8228 Conditions Parameter (Gain = 10) OUTPUT kΩ L Output Swing V = ±2 ± Over Temperature T = −40°C to +85°C Output Swing V = ± ± Over ...

Page 5

GAIN = 100 V = ± 25° kΩ, all specifications referred to input, unless otherwise noted. S REF A L Table 3. Conditions Parameter (Gain = 100) COMMON-MODE REJECTION RATIO ...

Page 6

AD8228 Conditions Parameter (Gain = 100) OUTPUT kΩ L Output Swing V = ±2 ± Over Temperature T = −40°C to +85°C Output Swing V = ± ± Over ...

Page 7

ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Supply Voltage Output Short-Circuit Current Input Voltage (Common Mode) Differential Input Voltage Storage Temperature Range 1 Operating Temperature Range Maximum Junction Temperature ESD Human Body Model Charge Device Model 1 Temperature range for specified ...

Page 8

AD8228 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 6. Pin Function Descriptions Pin No. Mnemonic Description 1 −IN Negative Input G1, G2 Gain Pins. Short together for a gain of 100. Leave unconnected for a gain of 10. 4 ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS T = 25° ± kΩ, unless otherwise noted –100 –50 0 G10 SYSTEM V RTI @ 15V (µV) OS Figure 3. ...

Page 10

AD8228 –0.6 –0.4 –0 15V (nA) OS Figure 9. Typical Distribution of Input Offset Current –1 –2 –3 –4 –5 –5 –4 –3 –2 ...

Page 11

WARM-UP TIME (Minutes) Figure 15. Change in Input Offset Voltage vs. Warm-Up Time +IN I BIAS 1 0 –IN I BIAS – –2 ...

Page 12

AD8228 140 G = 100 120 100 100 1k FREQUENCY (Hz) Figure 21. CMRR vs. Frequency, RTI 140 G = 100 120 100 ...

Page 13

S –1 –2 – – OUTPUT CURRENT (mA) Figure 27. Output Voltage Swing vs. Output Current –10 –8 –6 –4 –2 ...

Page 14

AD8228 5pA/DIV Figure 33. 0 Current Noise 10, 100 10k 100k FREQUENCY (Hz) Figure 34. Large Signal Frequency Response 5V/DIV 0.002%/DIV Figure 35. Large Signal Pulse ...

Page 15

10kΩ 0.001% SETTLING TIME 0.01% SETTLING TIME OUTPUT VOLTAGE STEP SIZE (V p-p) Figure 39. Settling Time vs. Step Size 20 ...

Page 16

AD8228 THEORY OF OPERATION I I COMPENSATION 600Ω Q1 –IN –V S ARCHITECTURE The AD8228 is based on the classic three op amp topology. This topology has two stages: a preamplifier to provide differential amplification, followed by ...

Page 17

REFERENCE TERMINAL The output voltage of the AD8228 is developed with respect to the potential on the reference terminal. This is useful when the output signal needs to be offset to a precise midsupply level. For example, a voltage source ...

Page 18

AD8228 References The output voltage of the AD8228 is developed with respect to the potential on the reference terminal. Care should be taken to tie REF to the appropriate local ground. Input Bias Current Return Path The input bias current ...

Page 19

APPLICATIONS INFORMATION DIFFERENTIAL DRIVE Figure 48 shows how to configure the AD8228 for differential output. The advantage of this circuit is that the dc differential accuracy depends on the AD8228 and not on the op amp or the resistors. This ...

Page 20

AD8228 OUTLINE DIMENSIONS 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 3.20 3.00 2.80 5. 3.20 4.90 3.00 4.65 2. PIN 1 0.65 BSC 0.95 0.85 1.10 MAX 0.75 0.15 0.38 0.23 0.00 0.22 0.08 COPLANARITY SEATING 0.10 PLANE ...

Page 21

... AD8228BRMZ-RL 1 –40°C to +85°C 1 AD8228BRMZ-R7 –40°C to +85°C 1 AD8228BRZ –40°C to +85°C 1 AD8228BRZ-RL –40°C to +85°C 1 AD8228ARZ-R7 –40°C to +85° RoHS Compliant Part. Package Description 8-Lead MSOP 8-Lead MSOP, 13" Tape and Reel 8-Lead MSOP, 7" Tape and Reel 8-Lead SOIC_N 8-Lead SOIC_N, 13" ...

Page 22

AD8228 NOTES Rev Page ...

Page 23

NOTES Rev Page AD8228 ...

Page 24

AD8228 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07035-0-7/08(0) Rev Page ...

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