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Features
Typical Values, TA = 25°C
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Bidirectional current sense capability
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Input offset voltage
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±1 mV max
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TCVOS
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±15 μV/°C max
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CMRR
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80 dB min
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Output voltage swing
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Rail-to-rail
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Bandwidth
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80 kHz
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Operating temperature range (ambient)
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−40°C to 125°C
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Supply voltage
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4.75V to 5.5V
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Supply current
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1 mA
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Description The LMP8271 is a fixed gain differential amplifier with a −2V to 16V input common mode voltage range and a supply voltage
range of 4.75V to 5.5V. The LMP8271 is part of the LMP precision amplifier family 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. This fixed gain is achieved
in two separate stages, a preamplifier with gain of +10 and a second stage amplifier with a gain of +2. The internal signal
path is brought out on two pins that provide a connection for a filter network.
The LMP8271 will function over an extended common mode input voltage range making the device suitable for applications with
load dump events such as automotive systems.
The mid-rail offset adjustment pin enables the user to utilize this device for bidirectional current sensing. This is achieved
by adjusting an externally set voltage reference. Accurate bidirectional load current measurements are achieved when monitoring
the output with respect to this reference voltage.
Applications
Fuel injection control
High and low side driver configuration current sensing
Power management systems
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Also Recommended
| LMP8276▲ | LMP8276 - High Common Mode, Gain Of 20, Bidirectional Precision Voltage Difference Amplifier |
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