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LMP8278Q-Q1

AKTIV

Split-Stage-Strommessverstärker, AEC-Q100, −2 bis 40 V, mit Inline-Filterfunkion

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Datenblatt

LMP8278Q-Q1

AKTIV
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Produktdetails

Product type Analog output Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -2 Input offset (±) (max) (µV) 2000 Input offset drift (±) (typ) (µV/°C) 2.5 Features Low-side Capable Rating Automotive Voltage gain (V/V) 14 CMRR (min) (dB) 80 Bandwidth (kHz) 90 Iq (max) (mA) 0.55 Number of channels 1 Comparators (#) 0 Gain error (%) 1 Gain error drift (±) (max) (ppm/°C) 25 Slew rate (V/µs) 0.7 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -2 Input offset (±) (max) (µV) 2000 Input offset drift (±) (typ) (µV/°C) 2.5 Features Low-side Capable Rating Automotive Voltage gain (V/V) 14 CMRR (min) (dB) 80 Bandwidth (kHz) 90 Iq (max) (mA) 0.55 Number of channels 1 Comparators (#) 0 Gain error (%) 1 Gain error drift (±) (max) (ppm/°C) 25 Slew rate (V/µs) 0.7 Operating temperature range (°C) -40 to 125
VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • TCVos ±15μV/°C Max
  • CMRR 80 dB Min
  • Input Offset Voltage ±2 mV max
  • CMVR −2V to 40V
  • Operating Ambient Temperature Range −40°C to 125°C
  • Single Supply Operation
  • Min / Max Limits 100% Tested unless Otherwise Noted
  • LMP8278Q Available in Automotive AEC-Q100 Grade 1 Qualified Version

All trademarks are the property of their respective owners.

  • TCVos ±15μV/°C Max
  • CMRR 80 dB Min
  • Input Offset Voltage ±2 mV max
  • CMVR −2V to 40V
  • Operating Ambient Temperature Range −40°C to 125°C
  • Single Supply Operation
  • Min / Max Limits 100% Tested unless Otherwise Noted
  • LMP8278Q Available in Automotive AEC-Q100 Grade 1 Qualified Version

All trademarks are the property of their respective owners.

The LMP8278 is a fixed 14x gain precision current sense amplifier. The part amplifies and filters small differential signals in the presence of high common mode voltages. The part operates from a single 5V supply voltage. With an input common mode voltage range from -2V to +28V the gain is very precise (±0.5%). The part can handle common mode voltages in the range -2V to +40V with relaxed specifications. The LMP8278 is a member of the Linear Monolithic Precision (LMP) family and is ideal for unidirectional current sensing applications. The parameter values that are shown in the Electrical Characteristics table are 100% tested and all bold values are also 100% tested over temperature, unless otherwise noted.

The part has a precise gain of 14x which is adequate in most targeted applications to drive an ADC to its full scale value. The fixed gain is achieved in two separate stages, a preamplifier with a gain of 7x and an output stage buffer amplifier with a gain of 2x. The connection between the two stages of the signal path is brought out on two pins to enable the possibility to create an additional filter network around the output buffer amplifier. These pins can also be used for alternative configurations with different gain as described in .

The LMP8278Q incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies. Reliability qualification is compliant with the requirements and temperature grades defined in the AEC Q100 standard.

The LMP8278 is a fixed 14x gain precision current sense amplifier. The part amplifies and filters small differential signals in the presence of high common mode voltages. The part operates from a single 5V supply voltage. With an input common mode voltage range from -2V to +28V the gain is very precise (±0.5%). The part can handle common mode voltages in the range -2V to +40V with relaxed specifications. The LMP8278 is a member of the Linear Monolithic Precision (LMP) family and is ideal for unidirectional current sensing applications. The parameter values that are shown in the Electrical Characteristics table are 100% tested and all bold values are also 100% tested over temperature, unless otherwise noted.

The part has a precise gain of 14x which is adequate in most targeted applications to drive an ADC to its full scale value. The fixed gain is achieved in two separate stages, a preamplifier with a gain of 7x and an output stage buffer amplifier with a gain of 2x. The connection between the two stages of the signal path is brought out on two pins to enable the possibility to create an additional filter network around the output buffer amplifier. These pins can also be used for alternative configurations with different gain as described in .

The LMP8278Q incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies. Reliability qualification is compliant with the requirements and temperature grades defined in the AEC Q100 standard.
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt LMP8278Q High Mode, 14 x Gain, Precision Sensing Amplifier datasheet (Rev. A) 22.03.2013
Anwendungshinweis Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML 27.04.2026
Anwendungshinweis Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18.11.2024
E-book An Engineer's Guide to Current Sensing (Rev. B) 12.04.2022

Design und Entwicklung

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Evaluierungsplatine

LMP8278MMEVAL — LMP8278MM-Evaluierungsplatine

The LMP8278Q Evaluation Board is designed to evaluate the LMP8278Q current sense amplifier.

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