SM72501 Datasheet, PDF (1/28 Pages) National Semiconductor (TI) – SolarMagic Precision, CMOS Input, RRIO, Wide Supply Range Amplifier

SM72501
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SNIS157C – JANUARY 2011 – REVISED APRIL 2013
SM72501 SolarMagic Precision, CMOS Input, RRIO, Wide Supply Range Amplifier
Check for Samples: SM72501
FEATURES
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•2 Renewable Energy Grade
Unless Otherwise noted, Typical values at
V_S = 5V
• Input Offset Voltage ±200 µV (max)
• Input Bias Current ±200 fA
• Input Voltage Noise 9 nV/√Hz
• CMRR 130 dB
• Open Loop Gain 130 dB
• Temperature Range −40°C to 125°C
• Unity Gain Bandwidth 2.5 MHz
• Supply Current (SM72501) 715 µA
• Supply Voltage Range 2.7V to 12V
• Rail-to-rail Input and Output
APPLICATIONS
• High Impedance Sensor Interface
• Battery Powered Instrumentation
• High Gain Amplifiers
• DAC Buffer
• Instrumentation Amplifier
• Active Filters
DESCRIPTION
The SM72501 is a low offset voltage, rail-to-rail input
and output precision amplifier with a CMOS input
stage and a wide supply voltage range. The
SM72501 is ideal for sensor interface and other
instrumentation applications.
The low offset voltage of less than ±200 µV along
with the 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.
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 difference 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.
The SM72501 is offered in the space saving 5-Pin
SOT-23. This small package is an ideal solution for
area constrained PC boards and portable electronics.
Typical Application
R
V₁
R
V⁺
-
A₁
+
V^-
R
R
V₂
R_S
V⁺
-
A₂
+
V^-
I = (V₂ ± V₁)
R_S
Z LOAD
Figure 1. Precision Current Source
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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