Difference Amplifier. AD8270 Datasheet

AD8270 Amplifier. Datasheet pdf. Equivalent


Analog Devices AD8270
Data Sheet
FEATURES
With no external resistors
Difference amplifier: gains of 0.5, 1, or 2
Single ended amplifiers: over 40 different gains
Set reference voltage at midsupply
Excellent ac specifications
15 MHz bandwidth
30 V/μs slew rate
High accuracy dc performance
0.08% maximum gain error
10 ppm/°C maximum gain drift
80 dB minimum CMRR (G = 2)
Two channels in small 4 mm × 4 mm LFCSP
Supply current: 2.5 mA per channel
Supply range: ±2.5 V to ±18 V
APPLICATIONS
Instrumentation amplifier building blocks
Level translators
Automatic test equipment
High performance audio
Sine/cosine encoders
GENERAL DESCRIPTION
The AD8270 is a low distortion, dual-channel amplifier with
internal gain setting resistors. With no external components,
it can be configured as a high performance difference amplifier
with gains of 0.5, 1, or 2. It can also be configured in over 40 single-
ended configurations, with gains ranging from −2 to +3.
The AD8270 is the first dual-difference amplifier in the small
4 mm × 4 mm LFCSP. It requires the same board area as a typical
single-difference amplifier. The smaller package allows a 2×
increase in channel density and a lower cost per channel, all
with no compromise in performance.
Precision Dual-Channel
Difference Amplifier
AD8270
FUNCTIONAL BLOCK DIAGRAM
–IN1A 1 10k
10k
10k
10k12 –IN1B
10k
–IN2A 2
_
10k
+IN2A 3
+
10k
+IN1A 4
AD8270
_
10k
11 –IN2B
+
10k
10 +IN2B
10k
9 +IN1B
20k20k
20k20k
Figure 1.
The AD8270 operates on both single and dual supplies and
requires only 2.5 mA maximum supply current for each ampli-
fier. It is specified over the industrial temperature range of
−40°C to +85°C and is fully RoHS compliant.
Table 1. Difference Amplifiers by Category
High
Single-Supply
High Speed Voltage Unidirectional
AD8270
AD8273
AMP03
AD628
AD629
AD8202
AD8203
Single-Supply
Bidirectional
AD8205
AD8206
AD8216
Rev. A
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AD8270 Datasheet
Recommendation AD8270 Datasheet
Part AD8270
Description Precision Dual-Channel Difference Amplifier
Feature AD8270; Data Sheet FEATURES With no external resistors Difference amplifier: gains of 0.5, 1, or 2 Single en.
Manufacture Analog Devices
Datasheet
Download AD8270 Datasheet




Analog Devices AD8270
AD8270* Product Page Quick Links
Last Content Update: 11/01/2016
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Documentation
Data Sheet
• AD8270: Precision Dual-Channel Difference Amplifier
Data Sheet
Technical Books
• A Designer's Guide to Instrumentation Amplifiers, 3rd
Edition, 2006
Tools and Simulations
• AD8270 SPICE Macro Model
Reference Materials
Technical Articles
• High-performance Adder Uses Instrumentation Amplifiers
Design Resources
• AD8270 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
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Analog Devices AD8270
AD8270
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Difference Amplifier Configurations ........................................ 3
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
Maximum Power Dissipation ..................................................... 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
Typical Performance Characteristics ............................................. 7
Theory of Operation ...................................................................... 13
REVISION HISTORY
5/2016—Rev. 0 to Rev. A
Changes to Figure 3 and Table 6..................................................... 6
Updated Outline Dimensions ....................................................... 19
Changes to Ordering Guide .......................................................... 19
1/2008—Revision 0: Initial Version
Data Sheet
Circuit Information.................................................................... 13
Driving the AD8270................................................................... 13
Package Considerations............................................................. 13
Power Supplies ............................................................................ 13
Input Voltage Range................................................................... 14
Applications Information .............................................................. 15
Difference Amplifier Configurations ...................................... 15
Single-Ended Configurations ................................................... 15
Differential Output .................................................................... 17
Driving an ADC ......................................................................... 18
Driving Cabling .......................................................................... 18
Outline Dimensions ....................................................................... 19
Ordering Guide .......................................................................... 19
Rev. A | Page 2 of 20







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