AD8226_16 Datasheet, PDF (1/29 Pages) Analog Devices – Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier

Data Sheet
Wide Supply Range, Rail-to-Rail
Output Instrumentation Amplifier
AD8226
FEATURES
Gain set with 1 external resistor
Gain range: 1 to 1000
Input voltage goes below ground
Inputs protected beyond supplies
Very wide power supply range
Single supply: 2.2 V to 36 V
Dual supplies: ±1.35 V to ±18 V
Bandwidth (G = 1): 1.5 MHz
CMRR (G = 1): 90 dB minimum for BR models
Input noise: 22 nV/√Hz
Typical supply current: 350 μA
Specified temperature: −40°C to +125°C
8-lead SOIC and MSOP packages
APPLICATIONS
Industrial process controls
Bridge amplifiers
Medical instrumentation
Portable data acquisition
Multichannel systems
PIN CONFIGURATION
–IN 1
R_G 2
R_G 3
+IN 4
AD8226
TOP VIEW
(Not to Scale)
Figure 1.
8 +V_S
7 V_OUT
6 REF
5 –V_S
Table 1. Instrumentation Amplifiers by Category¹
General
Purpose
Zero
Drift
Military
Grade
Low
Power
High Speed
PGA
AD8220 AD8231 AD620
AD627 AD8250
AD8221 AD8290 AD621
AD623 AD8251
AD8222 AD8293 AD524
AD8223 AD8253
AD8224 AD8553 AD526
AD8226
AD8228 AD8556 AD624
AD8227
AD8295 AD8557
AD8235/
AD8236
1 _{Visit www.analog.com for the latest instrumentation amplifiers.}
GENERAL DESCRIPTION
The AD8226 is a low cost, wide supply range instrumentation
amplifier that requires only one external resistor to set any gain
between 1 and 1000.
The AD8226 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 also includes the ability to go below the negative supply,
small signals near ground can be amplified without requiring dual
supplies. The AD8226 operates on supplies ranging from ±1.35 V
to ±18 V for dual supplies and 2.2 V to 36 V for single supply.
The robust AD8226 inputs are designed to connect to real-
world sensors. In addition to its wide operating range, the
AD8226 can handle voltages beyond the rails. For example,
with a ±5 V supply, the part is guaranteed to withstand ±35 V
at the input with no damage. Minimum as well as maximum
input bias currents are specified to facilitate open wire detection.
The AD8226 is perfect for multichannel, space-constrained
industrial applications. Unlike other low cost, low power
instrumentation amplifiers, the AD8226 is designed with
a minimum gain of 1 and can easily handle ±10 V signals.
With its MSOP package and 125°C temperature rating, the
AD8226 thrives in tightly packed, zero airflow designs.
The AD8226 is available in 8-lead MSOP and SOIC packages,
and is fully specified for −40°C to +125°C operation.
For a device with a similar package and performance as the
AD8226 but with gain settable from 5 to 1000, consider using
the AD8227.
Rev. C
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