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運算放大器 (op amps)
一般用途運算放大器

LF444QML

現行

軍用級、四路、30-V、1-MHz、低功耗運算放大器

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產品規格表

LF444QML

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 4 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 18 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 6 Rail-to-rail No GBW (typ) (MHz) 1 Slew rate (typ) (V/µs) 1 Vos (offset voltage at 25°C) (max) (mV) 10 Iq per channel (typ) (mA) 0.15 Vn at 1 kHz (typ) (nV√Hz) 35 Rating Military Operating temperature range (°C) -55 to 125 Offset drift (typ) (µV/°C) 10 Input bias current (max) (pA) 100 CMRR (typ) (dB) 100 Iout (typ) (A) 0.02 Architecture FET Input common mode headroom (to negative supply) (typ) (V) 3 Input common mode headroom (to positive supply) (typ) (V) -1 Output swing headroom (to negative supply) (typ) (V) 2 Output swing headroom (to positive supply) (typ) (V) -2
Number of channels 4 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 18 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 6 Rail-to-rail No GBW (typ) (MHz) 1 Slew rate (typ) (V/µs) 1 Vos (offset voltage at 25°C) (max) (mV) 10 Iq per channel (typ) (mA) 0.15 Vn at 1 kHz (typ) (nV√Hz) 35 Rating Military Operating temperature range (°C) -55 to 125 Offset drift (typ) (µV/°C) 10 Input bias current (max) (pA) 100 CMRR (typ) (dB) 100 Iout (typ) (A) 0.02 Architecture FET Input common mode headroom (to negative supply) (typ) (V) 3 Input common mode headroom (to positive supply) (typ) (V) -1 Output swing headroom (to negative supply) (typ) (V) 2 Output swing headroom (to positive supply) (typ) (V) -2
CDIP_SB (NAK) 14 117.3753 mm² 18.03 x 6.51

  • ¼ supply current of a LM148:  250 μA/Amplifier (max)
  • Low input bias current: 100 pA (max)
  • High gain bandwidth: 1 MHz
  • High slew rate: 1 V/μs
  • Low noise voltage for low power 
  • Low input noise current 
  • High input impedance: 10 12 Ω
  • High gain, VO = ±10V, RL = 10KΩ: 25K (min)
    •

  • ¼ supply current of a LM148:  250 μA/Amplifier (max)
  • Low input bias current: 100 pA (max)
  • High gain bandwidth: 1 MHz
  • High slew rate: 1 V/μs
  • Low noise voltage for low power 
  • Low input noise current 
  • High input impedance: 10 12 Ω
  • High gain, VO = ±10V, RL = 10KΩ: 25K (min)
    •

    The LF444 quad low power operational amplifier provides many of the same AC characteristics as the industry standard LM148 while greatly improving the DC characteristics of the LM148. The amplifier has the same bandwidth, slew rate, and gain (10 kΩ load) as the LM148 and only draws one fourth the supply current of the LM148. In addition the well matched high voltage JFET input devices of the LF444 reduce the input bias and offset currents by a factor of 10,000 over the LM148. The LF444 also has a very low equivalent input noise voltage for a low power amplifier.

    The LF444 is pin compatible with the LM148 allowing an immediate 4 times reduction in power drain in many applications. The LF444 should be used wherever low power dissipation and good electrical characteristics are the major considerations.

    The LF444 quad low power operational amplifier provides many of the same AC characteristics as the industry standard LM148 while greatly improving the DC characteristics of the LM148. The amplifier has the same bandwidth, slew rate, and gain (10 kΩ load) as the LM148 and only draws one fourth the supply current of the LM148. In addition the well matched high voltage JFET input devices of the LF444 reduce the input bias and offset currents by a factor of 10,000 over the LM148. The LF444 also has a very low equivalent input noise voltage for a low power amplifier.

    The LF444 is pin compatible with the LM148 allowing an immediate 4 times reduction in power drain in many applications. The LF444 should be used wherever low power dissipation and good electrical characteristics are the major considerations.

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    類型 標題 日期
    * Data sheet LF444QML Quad Low Power JFET Input Operational Amplifier datasheet 2010年 12月 16日
    E-book The Signal e-book: A compendium of blog posts on op amp design topics 2017年 3月 28日

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    ANALOG-ENGINEER-CALC — 類比工程師計算機

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    設計工具

    CIRCUIT060013 — 具有 T 網路回饋電路的反相放大器

    此設計可反轉輸入訊號 VIN，並使用 1000 V/V 或 60 dB 訊號增益。具有 T 回饋網路的反相放大器可在沒有較小 R4 值或超大回饋電阻器值的情況下獲得高增益。
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    CIRCUIT060015 — 可調式參考電壓電路

    此電路結合反相及非反相放大器，讓參考電壓可從負輸入電壓向上調整至輸入電壓。可加入增益以提高最大負參考位準。
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    CIRCUIT060074 — 具有比較器電路的高壓側電流感測

    此高壓側電流感測解決方案使用一個具有軌對軌輸入共模範圍的比較器，若負載電流上升到 1 A 以上，便在比較器輸出 (COMP OUT) 建立過電流警示 (OC 警示) 訊號。此實作中的 OC 訊號為低電位作動。因此當超過 1-A 閾值時，比較器輸出會變低。實作磁滯後會在負載電流降低至 0.5 A (減少 50%) 時，讓 OC-Alert 返回邏輯高狀態。此電路利用開漏輸出比較器，為控制數位邏輯輸入針腳而進行電平轉換輸出高邏輯電平。對於需要驅動 MOSFET 開關閘極的應用，建議使用具推挽輸出的比較器。
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    TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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