82592 Datasheet, PDF (1/24 Pages) Texas Instruments – Precision, CMOS Input, RRIO, Wide Supply Range Amplifiers

June 23, 2008
LMP7701/LMP7702/LMP7704
Precision, CMOS Input, RRIO, Wide Supply Range
Amplifiers
General Description
The LMP7701/LMP7702/LMP7704 are single, dual, and quad
low offset voltage, rail-to-rail input and output precision am-
plifiers each with a CMOS input stage and a wide supply
voltage range. The LMP7701/LMP7702/LMP7704 are part of
the LMP^® precision amplifier family and are ideal for sensor
interface and other instrumentation applications.
The guaranteed low offset voltage of less than ±200 µV along
with the guaranteed low input bias current of less than ±1 pA
make the LMP7701 ideal for precision applications. The
LMP7701/LMP7702/LMP7704 are built utilizing VIP50 tech-
nology, which allows the combination of a CMOS input stage
and a 12V common mode and supply voltage range. This
makes the LMP7701/LMP7702/LMP7704 great choices in
many applications where conventional CMOS parts cannot
operate under the desired voltage conditions.
The LMP7701/LMP7702/LMP7704 each have a rail-to-rail in-
put stage that significantly reduces the CMRR glitch com-
monly 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 LMP7701/LMP7702/
LMP7704 swings within 40 mV of either rail to maximize the
signal dynamic range in applications requiring low supply
voltage.
The LMP7701 is offered in the space saving 5-Pin SOT23 and
8-Pin SOIC package. The LMP7702 is offered in the 8-Pin
SOIC and 8-Pin MSOP package. The quad LMP7704 is of-
fered in the 14-Pin SOIC and 14-Pin TSSOP package. These
small packages are ideal solutions for area constrained PC
boards and portable electronics.
Features
Unless otherwise noted, typical values at V_S = 5V
■ ^{Input offset voltage (LMP7701)}
±200 µV (max)
■ ^{Input offset voltage (LMP7702/LMP7704) ±220 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 (LMP7701)}
715 µA
■ ^{Supply current (LMP7702)}
1.5 mA
■ ^{Supply current (LMP7704)}
2.9 mA
■ ^{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}
Typical Application
Precision Current Source
LMP^® is a registered trademark of National Semiconductor Corporation.
© 2008 National Semiconductor Corporation 201273
20127305
www.national.com