May 10, 2011
SM72501
SolarMagic Precision, CMOS Input, RRIO, Wide Supply
Range Amplifier
General Description
Features
The SM72501 is a low offset voltage, rail-to-rail input and out-
put precision amplifier with a CMOS input stage and a wide
supply voltage range. The SM72501 is ideal for sensor inter-
face and other instrumentation applications.
Renewable Energy Grade
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Unless otherwise noted, typical values at VS = 5V
Input offset voltage
Input bias current
Input voltage noise
CMRR
±200 µV (max)
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±200 fA
9 nV/√Hz
130 dB
The guaranteed low offset voltage of less than ±200 µV along
with the guaranteed low input bias current of less than ±1 pA
makes the SM72501 ideal for precision applications. The
SM72501 is built utilizing VIP50 technology, which allows the
combination of a CMOS input stage and a 12V common mode
and supply voltage range. This makes the SM72501 a great
choice in many applications where conventional CMOS parts
cannot operate under the desired voltage conditions.
Open loop gain
130 dB
−40°C to 125°C
2.5 MHz
Temperature range
Unity gain bandwidth
Supply current (SM72501)
Supply voltage range
Rail-to-rail input and output
715 µA
2.7V to 12V
The SM72501 has a rail-to-rail input stage that significantly
reduces the CMRR glitch commonly associated with rail-to-
rail input amplifiers. This is achieved by trimming both sides
of the complimentary input stage, thereby reducing the differ-
ence between the NMOS and PMOS offsets. The output of
the SM72501 swings within 40 mV of either rail to maximize
the signal dynamic range in applications requiring low supply
voltage.
Applications
High impedance sensor interface
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Battery powered instrumentation
High gain amplifiers
DAC buffer
The SM72501 is offered in the space saving 5-Pin SOT23.
This small package is an ideal solution for area constrained
PC boards and portable electronics.
Instrumentation amplifier
Active filters
Typical Application
30142105
Precision Current Source
© 2011 National Semiconductor Corporation
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