參數(shù)資料
型號: LMP8270
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 運(yùn)算放大器
英文描述: High Common Mode, Gain of 20, Precision Voltage Difference Amplifiers
中文描述: OP-AMP, 1000 uV OFFSET-MAX, 0.08 MHz BAND WIDTH, PDSO8
封裝: SOIC-8
文件頁數(shù): 1/5頁
文件大小: 458K
代理商: LMP8270
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 = 25C
n
Input Offset Voltage
n
TCVos (LMP8270)
n
TCVos (LMP8275)
n
CMRR
n
Extended CMVR
n
Output Voltage Swing
n
Bandwidth
n
Operating Temperature Range (Ambient) -40C to 125C
n
Operating Temperature Range (bare die) -40C to 150C
n
Supply Voltage
n
Supply Current
1mV max
15μV/C max
30μV/C max
80dB Min
-5V to 36V
Rail to Rail
80KHz
4.5V to 5.5V
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.
PRELIMINARY
January 2005
L
2005 National Semiconductor Corporation
DS201307
www.national.com
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PDF描述
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