Wide Supply Range, Rail-to-Rail
Output Instrumentation Amplifier
AD8227
FEATURES
PIN CONFIGURATION
Gain set with 1 external resistor
Gain range: 5 to 1000
Input voltage goes below ground
Inputs protected beyond supplies
Very wide power supply range
Single supply: 2.2 V to 36 V
AD8227
1
2
3
4
8
7
6
5
–IN
+V
S
R
R
V
OUT
G
G
REF
–V
+IN
S
TOP VIEW
(Not to Scale)
Dual supply: 1.5 V to 18 V
Bandwidth (G = 5): 250 kHz
Figure 1.
CMRR (G = 5): 100 dB minimum (B Grade)
Input noise: 24 nV/√Hz
Typical supply current: 350 μA
Specified temperature: −40°C to +125°C
8-lead SOIC and MSOP packages
Table 1. Instrumentation Amplifiers by Category1
General
Purpose
Zero
Drift
Military
Grade
Low
Power
High Speed
PGA
AD8220
AD8221
AD8222
AD8224
AD8228
AD8295
AD8231
AD8290
AD8293
AD8553
AD8556
AD8557
AD620
AD621
AD524
AD526
AD624
AD627
AD623
AD8223
AD8226
AD8227
AD8250
AD8251
AD8253
APPLICATIONS
Industrial process controls
Bridge amplifiers
Medical instrumentation
Portable data acquisition
Multichannel systems
1 See www.analog.com for the latest selection of instrumentation amplifiers.
GENERAL DESCRIPTION
The AD8227 is ideal for multichannel, space-constrained
applications. With its MSOP package and 125°C temperature
rating, the AD8227 thrives in tightly packed, zero airflow designs.
The AD8227 is a low cost, wide supply range instrumentation
amplifier that requires only one external resistor to set any gain
between 5 and 1000.
The AD8227 is available in 8-pin MSOP and SOIC packages.
It is fully specified for −40°C to +125°C operation.
The AD8227 is designed to work with a variety of signal voltages.
A wide input range and rail-to-rail output allow the signal to
make full use of the supply rails. Because the input range can
also go below the negative supply, small signals near ground can
be amplified without requiring dual supplies. The AD8227
operates on supplies ranging from 1.5 ꢀ to 18 ꢀ ꢁ2.2 ꢀ to
36 ꢀ single supply).
For a similar instrumentation amplifier with a gain range of 1 to
1000, see the AD8226.
The robust AD8227 inputs are designed to connect to real-
world sensors. In addition to its wide operating range, the
AD8227 can handle voltages beyond the rails. For example,
with a 5 ꢀ supply, the part is guaranteed to withstand 35 ꢀ
at the input with no damage. Minimum as well as maximum
input bias currents are specified to facilitate open wire detection.
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 registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2009 Analog Devices, Inc. All rights reserved.
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