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LMP8278Q-Q1

現行

具線路濾波器功能的 AEC-Q100、-2 至 40V 分段電流感測放大器

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產品規格表

LMP8278Q-Q1

現行
產品規格表 立即訂購

產品詳細資料

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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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LMP8278Q High Mode, 14 x Gain, Precision Sensing Amplifier datasheet (Rev. A) 2013/3/22
應用說明 Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML 2026/4/27
應用說明 Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 2024/11/18
電子書 An Engineer's Guide to Current Sensing (Rev. B) 2022/4/12

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開發板

LMP8278MMEVAL — LMP8278MM 評估板

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

使用指南: PDF
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模擬型號

LMP8278Q PSpice Model

SNAM034.ZIP (16 KB) - PSpice 模型
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計算工具

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

此 Excel 計算機提供兩個與五個標準電流感測放大器的比較，並提供包含各裝置基本參數的圖表。此計算機也會採用使用者的系統條件輸入，例如共模電壓、供應電壓、分流電阻器值與公差，然後在可調整電流範圍中繪製錯誤曲線。此外，計算機會根據計算的全刻度輸入電壓除以最大量測電流，輸出最大分流值 (mΩ)。
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參考設計

TIDA-00302 — 具瞬態穩定性的電流分流監控器參考設計

此高壓側電流分流監控器可用於測量電流通過电流感测電阻器時在电阻器上所形成的電壓。

此外，實作外部保護電路以提供突波和快速暫態保護，並針對 IEC61000-4-4 和 IEC61000-4-5 展示不同的抗擾度等級。

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