AD8236_16 Datasheet, PDF (1/21 Pages) Analog Devices – 40 μA Micropower Instrumentation Amplifier with Zero Crossover Distortion

40 μA Micropower Instrumentation
Amplifier with Zero Crossover Distortion
AD8236
FEATURES
Low power: 40 μA supply current (maximum)
Low input currents
1 pA input bias current
0.5 pA input offset current
High CMRR: 110 dB CMRR, G = 100
Space-saving MSOP
Zero input crossover distortion
Rail-to-rail input and output
Gain set with single resistor
Operates from 1.8 V to 5.5 V
APPLICATIONS
Medical instrumentation
Low-side current sense
Portable devices
CONNECTION DIAGRAM
–IN 1
R_G 2
R_G 3
+IN 4
8 +V_S
7 V_OUT
6 REF
5 –V_S
AD8236
TOP VIEW
(Not to Scale)
Figure 1.
5.0
4.5
4.0
G=5
V_S = 5V
3.5
V_REF = 2.5V
3.0
2.5
2.0
1.5
G=5
1.0
V_S = 1.8V
V_REF = 0.9V
0.5
0
–0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
OUTPUT VOLTAGE (V)
Figure 2. Wide Common-Mode Voltage Range vs. Output Voltage
GENERAL DESCRIPTION
The AD8236 is the lowest power instrumentation amplifier
in the industry. It has rail-to-rail outputs and can operate on
voltages as low as 1.8 V. Its 40 μA maximum supply current
makes it an excellent choice in battery-powered applications.
The AD8236’s high input impedance, low input bias current of
1 pA, high CMRR of 110 dB (G = 100), small size, and low power
offer tremendous value. It has a wider common-mode voltage
range than typical three-op-amp instrumentation amplifiers,
making this a great solution for applications that operate on a
single 1.8 V or 3 V supply. An innovative input stage allows for
a wide rail-to-rail input voltage range without the crossover
distortion common in other designs.
The AD8236 is available in an 8-lead MSOP and is specified
over the industrial temperature range of −40°C to +125°C.
Table 1. Instrumentation Amplifiers by Category¹
General
Purpose Zero Drift
Military Low
High Speed
Grade Power PGA
AD8220 AD8230
AD620 AD8236 AD8250
AD8221 AD8231
AD621 AD627 AD8251
AD8222 AD8290
AD624 AD623 AD8253
AD8228 AD8293G80 AD524 AD8223
AD8295 AD8293G160 AD526 AD8226
AD8553
AD8556
AD8557
1 _{See www.analog.com/inamps for the latest instrumentation amplifiers.}
Rev. 0
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