
LMC6572 Dual/LMC6574 Quad
Low Voltage (2.7V and 3V) Operational Amplifier
General Description
Low voltage operation and low power dissipation make the
LMC6574/2 ideal for battery-powered systems.
3V amplifier performance is backed by 2.7V guarantees to
ensure operation throughout battery lifetime. These guaran-
tees also enable analog circuits to operate from the same
3.3V supply used for digital logic.
Battery life is maximized because each amplifier dissipates
only micro-watts of power.
The LMC6574/2 does not sacrifice functionality for low volt-
age operation. The LMC6574/2 generates 120 dB of
open-loop gain just like a conventional amplifier, but the
LMC6574/2 can do this from a 2.7V supply.
These amplifiers are designed with features that optimize
low voltage operation. The output voltage swings rail-to-rail
to maximize signal-to-noise ratio and dynamic signal range.
The common-mode input voltage range extends from
800 mV below the positive supply to 100 mV below ground.
This device is built with National’s advanced Double-Poly
Silicon-Gate CMOS process.
LMC6572 is also available in MSOP package which is al-
most half the size of a SO-8 device.
Features
(Typical unless otherwise noted)
n
Guaranteed 2.7V and 3V Performance
n
Rail-to-Rail Output Swing (within 5 mV of supply rail,
100 k
load)
n
Ultra-Low Supply Current:
n
Low Cost
n
Ultra-Low Input Current:
n
High Voltage Gain
@
V
S
=2.7V, R
L
=100 k
:
n
Specified for 100 k
and 5 k
loads
n
Available in MSOP Package
40 μA/Amplifier
20 fA
120 dB
Applications
n
Transducer Amplifier
n
Portable or Remote Equipment
n
Battery-Operated Instruments
n
Data Acquisition Systems
n
Medical Instrumentation
n
Improved Replacement for TLV2322 and TLV2324
Connection Diagrams
8-Pin DIP/SO/MSOP
DS011934-1
Order Number LMC6572AIN, LMC6572BIN,
LMC6572AIM, LMC6572BIM or LMC6572BIMM
See NS Package Number N08E, M08A or MUA08A
14-Pin DIP/SO
DS011934-2
Order Number LMC6574AIN, LMC6574BIN,
LMC6574AIM or LMC6574BIM
See NS Package Number N14A or M14A
December 1996
L
1999 National Semiconductor Corporation
DS011934
www.national.com