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PDF LMP8270 Data sheet ( Hoja de datos )
| Número de pieza | LMP8270 | |
| Descripción | High Common Mode / Gain of 20 / Precision Voltage Difference Amplifiers | |
| Fabricantes | National Semiconductor | |
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PRELIMINARY
January 2005
LMP8270, LMP8275
High Common Mode, Gain of 20, Precision Voltage
Difference Amplifiers
General Description
The LMP™8270, LMP8275 are fixed gain differential ampli-
fiers with a -2V to 27V input common mode voltage range
and a supply voltage range of 4.5V to 5.5V. The LMP8270,
LMP8275 are precision amplifiers which will detect, amplify
and filter small differential signals in the presence of high
common mode voltages. The gain is fixed at 20 and is
adequate to drive an ADC to full scale in most cases. The
LMP8270, LMP8275 have a preamplifier with a fixed gain of
10 and an amplifier with a fixed gain of 2, achieving overall
fixed gain of 20. The internal signal path between these two
stages is brought out on two pins, A1 and A2, which provide
a connection for a filter network.
The LMP8270, LMP8275 will function with reduced specifi-
cations over the extended common mode input voltage
range of -5 to 36 Volts. This feature makes the device
suitable for applications with load dump in automotive sys-
tems.
Features
n Typical Values, TA = 25˚C
n Input Offset Voltage
1mV max
n TCVos (LMP8270)
15µV/˚C max
n TCVos (LMP8275)
30µV/˚C max
n CMRR
80dB Min
n Extended CMVR
-5V to 36V
n Output Voltage Swing
Rail to Rail
n Bandwidth
80KHz
n Operating Temperature Range (Ambient) -40˚C to 125˚C
n Operating Temperature Range (bare die) -40˚C to 150˚C
n Supply Voltage
4.5V to 5.5V
n Supply Current
1mA
Applications
n Fuel Injection Control
n Low Side Driver Configuration Current Sensing
n Power Management Systems
Typical Application
Typical Application: Low side Current Sensing
20130702
LMP™ is a trademark of National Semiconductor Corporation.
© 2005 National Semiconductor Corporation DS201307
www.national.com
1 page  
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS
WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body, or
(b) support or sustain life, and whose failure to perform when
properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to result
in a significant injury to the user.
2. A critical component is any component of a life support device
or system whose failure to perform can be reasonably
expected to cause the failure of the life support device or
system, or to affect its safety or effectiveness.
BANNED SUBSTANCE COMPLIANCE
National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship
Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned
Substances’’ as defined in CSP-9-111S2.
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Support Center
Email: [email protected]
Tel: 1-800-272-9959
www.national.com
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5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet LMP8270.PDF ] | |
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