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運算放大器 (op amps)
一般用途運算放大器

LMV951

現行

具備關機功能的單路、3-V、2.8-MHz、0.9-V 最小電源、80-mA 輸出電流運算放大器

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產品規格表

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功能相同，但引腳輸出與所比較的產品不同
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)

LMV951

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) 3 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 0.9 Rail-to-rail In, Out GBW (typ) (MHz) 2.8 Slew rate (typ) (V/µs) 1.4 Vos (offset voltage at 25°C) (max) (mV) 2.8 Iq per channel (typ) (mA) 0.57 Vn at 1 kHz (typ) (nV√Hz) 25 Rating Catalog Operating temperature range (°C) -40 to 125 Offset drift (typ) (µV/°C) 0.15 Features Shutdown, Zero Crossover Input bias current (max) (pA) 80000 CMRR (typ) (dB) 93 Iout (typ) (A) 0.08 Architecture Bipolar Input common mode headroom (to negative supply) (typ) (V) -0.2 Input common mode headroom (to positive supply) (typ) (V) 0.2 Output swing headroom (to negative supply) (typ) (V) 0.013 Output swing headroom (to positive supply) (typ) (V) -0.017
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 3 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 0.9 Rail-to-rail In, Out GBW (typ) (MHz) 2.8 Slew rate (typ) (V/µs) 1.4 Vos (offset voltage at 25°C) (max) (mV) 2.8 Iq per channel (typ) (mA) 0.57 Vn at 1 kHz (typ) (nV√Hz) 25 Rating Catalog Operating temperature range (°C) -40 to 125 Offset drift (typ) (µV/°C) 0.15 Features Shutdown, Zero Crossover Input bias current (max) (pA) 80000 CMRR (typ) (dB) 93 Iout (typ) (A) 0.08 Architecture Bipolar Input common mode headroom (to negative supply) (typ) (V) -0.2 Input common mode headroom (to positive supply) (typ) (V) 0.2 Output swing headroom (to negative supply) (typ) (V) 0.013 Output swing headroom (to positive supply) (typ) (V) -0.017
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • (Typical 1-V Supply, Unless Otherwise Noted)
  • Ensured 1-V, 380-µA Single-Supply Operation
  • Shutdown to 50-nA Supply Current
  • Wide 2.7-MHz Bandwidth
  • Rail-to-Rail Input With Zero Crossover
  • No Input IBIAS Current Reversal Over VCM Range
  • 1000-pF Output Drive Capability
  • High-Output Drive Capability
    • Sink Current: 35 mA
    • Source Current: 45 mA
  • Rail-to-Rail Buffered Output
    • At 600-Ω Load, 32 mV from Either Rail
    • At 2-kΩ Load, 12 mV from Either Rail
  • Temperature Range –40°C to 125°C
  • (Typical 1-V Supply, Unless Otherwise Noted)
  • Ensured 1-V, 380-µA Single-Supply Operation
  • Shutdown to 50-nA Supply Current
  • Wide 2.7-MHz Bandwidth
  • Rail-to-Rail Input With Zero Crossover
  • No Input IBIAS Current Reversal Over VCM Range
  • 1000-pF Output Drive Capability
  • High-Output Drive Capability
    • Sink Current: 35 mA
    • Source Current: 45 mA
  • Rail-to-Rail Buffered Output
    • At 600-Ω Load, 32 mV from Either Rail
    • At 2-kΩ Load, 12 mV from Either Rail
  • Temperature Range –40°C to 125°C

The LMV951 amplifier is capable of operating at supply voltages from 0.9 V to 3 V with specified specs at 1-V and 1.8-V single supply.

The input common-mode range extends to both power supply rails without the offset transition zone and input bias current reversal inherent to most rail-to-rail input amplifiers.

Contrary to a conventional rail-to-rail output amplifier, the LMV951 has a buffered output stage, providing an open-loop gain which is relatively unaffected by resistive output loading. At 1-V supply voltage, the LMV951 is able to source and sink in excess of
35 mA and offers a gain bandwidth product of 2.7 MHz.

In shutdown mode, the LMV951 consumes less than 50 nA of supply current.

The LMV951 amplifier is capable of operating at supply voltages from 0.9 V to 3 V with specified specs at 1-V and 1.8-V single supply.

The input common-mode range extends to both power supply rails without the offset transition zone and input bias current reversal inherent to most rail-to-rail input amplifiers.

Contrary to a conventional rail-to-rail output amplifier, the LMV951 has a buffered output stage, providing an open-loop gain which is relatively unaffected by resistive output loading. At 1-V supply voltage, the LMV951 is able to source and sink in excess of
35 mA and offers a gain bandwidth product of 2.7 MHz.

In shutdown mode, the LMV951 consumes less than 50 nA of supply current.
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類型 標題 日期
* Data sheet LMV951 1-V, 2.7-MHz, Zero Crossover Rail-to-Rail Input and Output Amplifier With Shutdown datasheet (Rev. D) PDF | HTML 2015年 9月 23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 Low-Voltage Current Loop Transmitter 2007年 8月 2日

設計與開發

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模擬型號

LMV951 PSPICE Model

SNOM029.ZIP (2 KB) - PSpice Model
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計算工具

ANALOG-ENGINEER-CALC — 類比工程師計算機

The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
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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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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

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
要求
模擬工具

TINA-TI — 基於 SPICE 的類比模擬程式

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 (...)
使用指南: PDF
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