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運算放大器 (op amps)
一般用途運算放大器

LMV981-N

現行

具備關機功能的單路、5-V、1.5-MHz、65-mA 輸出電流、RRIO 運算放大器

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OPA310 現行 單路、5.5-V、3-MHz、高輸出電流 (150 mA)、快速關機 (1 μs) 運算放大器 Higher GBW (3MHz), better accuracy (1.4mV Vos max), lower noise (18nV/√Hz), higher output current (150mA)

LMV981-N

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.8 Rail-to-rail In, Out GBW (typ) (MHz) 1.5 Slew rate (typ) (V/µs) 0.42 Vos (offset voltage at 25°C) (max) (mV) 4 Iq per channel (typ) (mA) 0.116 Vn at 1 kHz (typ) (nV√Hz) 50 Rating Catalog Operating temperature range (°C) -40 to 125 Offset drift (typ) (µV/°C) 5.5 Features Shutdown, Small Size Input bias current (max) (pA) 35000 CMRR (typ) (dB) 86 Iout (typ) (A) 0.065 Architecture Bipolar Input common mode headroom (to negative supply) (typ) (V) -0.2 Input common mode headroom (to positive supply) (typ) (V) 0.3 Output swing headroom (to negative supply) (typ) (V) 0.037 Output swing headroom (to positive supply) (typ) (V) -0.033
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.8 Rail-to-rail In, Out GBW (typ) (MHz) 1.5 Slew rate (typ) (V/µs) 0.42 Vos (offset voltage at 25°C) (max) (mV) 4 Iq per channel (typ) (mA) 0.116 Vn at 1 kHz (typ) (nV√Hz) 50 Rating Catalog Operating temperature range (°C) -40 to 125 Offset drift (typ) (µV/°C) 5.5 Features Shutdown, Small Size Input bias current (max) (pA) 35000 CMRR (typ) (dB) 86 Iout (typ) (A) 0.065 Architecture Bipolar Input common mode headroom (to negative supply) (typ) (V) -0.2 Input common mode headroom (to positive supply) (typ) (V) 0.3 Output swing headroom (to negative supply) (typ) (V) 0.037 Output swing headroom (to positive supply) (typ) (V) -0.033
DSBGA (YZR) 6 2.1875 mm² 1.75 x 1.25 SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8 SOT-SC70 (DCK) 6 4.2 mm² 2 x 2.1
  • Ensured 1.8-V, 2.7-V, and 5-V Specifications
  • Output Swing:
    • 600-Ω Load: 80-mV from Rail
    • 2-kΩ Load: 30-mV from Rail
  • VCM 200 mV Beyond Rails
  • Supply Current (Per Channel): 100 µA
  • Gain Bandwidth Product: 1.4 MHz
  • Maximum VOS: 4 mV
  • Gain with 600-Ω Load: 101 dB
  • Ultra-Small Package: DSBGA 1.0 mm × 1.5 mm
  • Turnon Time from Shutdown: 19 µs
  • Independent Shutdown on Dual
  • Temperature Range: −40°C to 125°C
  • Ensured 1.8-V, 2.7-V, and 5-V Specifications
  • Output Swing:
    • 600-Ω Load: 80-mV from Rail
    • 2-kΩ Load: 30-mV from Rail
  • VCM 200 mV Beyond Rails
  • Supply Current (Per Channel): 100 µA
  • Gain Bandwidth Product: 1.4 MHz
  • Maximum VOS: 4 mV
  • Gain with 600-Ω Load: 101 dB
  • Ultra-Small Package: DSBGA 1.0 mm × 1.5 mm
  • Turnon Time from Shutdown: 19 µs
  • Independent Shutdown on Dual
  • Temperature Range: −40°C to 125°C

LMV98x-N are low-voltage, low-power operational amplifiers. LMV98x-N operate from 1.8-V to 5-V supply voltages and have rail-to-rail input and output. LMV98x-N input common mode voltage extends 200mV beyond the supplies which enables user enhanced functionality beyond the supply voltage range. The output can swing rail-to-rail unloaded and within 105 mV from the rail with 600-Ω load at 1.8-V supply. LMV98x-N are optimized to work at 1.8 V, which makes them ideal for portable two-cell battery powered systems and single cell Li-Ion systems.

LMV98x-N offer a shutdown pin that can be used to disable the device and reduce the supply current. The device is in shutdown when the SHDN pin is low. The output is high impedance in shutdown.

LMV98x-N exhibit excellent speed-power ratio, achieving 1.4-MHz gain bandwidth product at 1.8-V supply voltage with low supply current. LMV98x-N are capable of driving a 600-Ω load and up to 1000-pF capacitive load with minimal ringing. LMV98x-N have a high DC gain of 101 dB, making them suitable for low frequency applications.

LMV981-N is offered in space-saving, 6-pin DSBGA, SC70, and SOT-23 packages. The 6-pin DSBGA package has only a 1.006 mm × 1.514 mm × 0.945 mm footprint. LMV982-N is offered in a space-saving, 10-pin VSSOP package. These small packages are ideal solutions for area constrained PCBs and portable electronics such as cellular phones and PDAs.

LMV98x-N are low-voltage, low-power operational amplifiers. LMV98x-N operate from 1.8-V to 5-V supply voltages and have rail-to-rail input and output. LMV98x-N input common mode voltage extends 200mV beyond the supplies which enables user enhanced functionality beyond the supply voltage range. The output can swing rail-to-rail unloaded and within 105 mV from the rail with 600-Ω load at 1.8-V supply. LMV98x-N are optimized to work at 1.8 V, which makes them ideal for portable two-cell battery powered systems and single cell Li-Ion systems.

LMV98x-N offer a shutdown pin that can be used to disable the device and reduce the supply current. The device is in shutdown when the SHDN pin is low. The output is high impedance in shutdown.

LMV98x-N exhibit excellent speed-power ratio, achieving 1.4-MHz gain bandwidth product at 1.8-V supply voltage with low supply current. LMV98x-N are capable of driving a 600-Ω load and up to 1000-pF capacitive load with minimal ringing. LMV98x-N have a high DC gain of 101 dB, making them suitable for low frequency applications.

LMV981-N is offered in space-saving, 6-pin DSBGA, SC70, and SOT-23 packages. The 6-pin DSBGA package has only a 1.006 mm × 1.514 mm × 0.945 mm footprint. LMV982-N is offered in a space-saving, 10-pin VSSOP package. These small packages are ideal solutions for area constrained PCBs and portable electronics such as cellular phones and PDAs.
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類型 標題 日期
* Data sheet LMV98x-N Small, Low-Power, 1.8-V RRIO Operational Amplifiers With Shutdown datasheet (Rev. M) PDF | HTML 2016年 9月 30日
Circuit design AC coupled (HPF) inverting amplifier circuit (Rev. A) PDF | HTML 2019年 2月 1日
E-book The Signal e-book: A compendium of blog posts on op amp design topics 2017年 3月 28日
Application note AN-1515 A Comprehensive Study of the Howland Current Pump (Rev. A) 2013年 4月 26日
Application note AN-1684 Saving Power in an AC-Coupled Amplifier Circuit (Rev. A) 2013年 4月 26日

設計與開發

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LMV981-N PSPICE Model

SNOM030.ZIP (3 KB) - PSpice Model
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計算工具

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設計工具

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設計工具

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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設計工具

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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模擬工具

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DSBGA (YZR) 6 檢視選項
SOT-23 (DBV) 6 檢視選項
SOT-SC70 (DCK) 6 檢視選項
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