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放大器
運算放大器 (op amps)
一般用途運算放大器

LMV321A

現行

單路、5.5-V、1-MHz、4-mV 偏移電壓、RRO 運算放大器

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產品規格表

LMV321A

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) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.5 Rail-to-rail In to V-, Out GBW (typ) (MHz) 1 Slew rate (typ) (V/µs) 1.7 Vos (offset voltage at 25°C) (max) (mV) 4 Iq per channel (typ) (mA) 0.08 Vn at 1 kHz (typ) (nV√Hz) 33 Rating Catalog Operating temperature range (°C) -40 to 125 Offset drift (typ) (µV/°C) 1 Features Cost Optimized, EMI Hardened, Standard Amps CMRR (typ) (dB) 77 Iout (typ) (A) 0.04 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) -1 Output swing headroom (to negative supply) (typ) (V) 0.02 Output swing headroom (to positive supply) (typ) (V) -0.02
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.5 Rail-to-rail In to V-, Out GBW (typ) (MHz) 1 Slew rate (typ) (V/µs) 1.7 Vos (offset voltage at 25°C) (max) (mV) 4 Iq per channel (typ) (mA) 0.08 Vn at 1 kHz (typ) (nV√Hz) 33 Rating Catalog Operating temperature range (°C) -40 to 125 Offset drift (typ) (µV/°C) 1 Features Cost Optimized, EMI Hardened, Standard Amps CMRR (typ) (dB) 77 Iout (typ) (A) 0.04 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) -1 Output swing headroom (to negative supply) (typ) (V) 0.02 Output swing headroom (to positive supply) (typ) (V) -0.02
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8 SOT-SC70 (DCK) 5 4.2 mm² 2 x 2.1
  • Low input offset voltage: ±1mV
  • Rail-to-rail output
  • Unity-gain bandwidth: 1MHz
  • Low broadband noise: 30nV/√ Hz
  • Low input bias current: 10pA
  • Low quiescent current: 70µA/Ch
  • Unity-gain stable
  • Internal RFI and EMI filter
  • Operational at supply voltages as low as 2.5V
  • Easier to stabilize with higher capacitive load due to resistive open-loop output impedance
  • Extended temperature range: –40°C to 125°C
  • Low input offset voltage: ±1mV
  • Rail-to-rail output
  • Unity-gain bandwidth: 1MHz
  • Low broadband noise: 30nV/√ Hz
  • Low input bias current: 10pA
  • Low quiescent current: 70µA/Ch
  • Unity-gain stable
  • Internal RFI and EMI filter
  • Operational at supply voltages as low as 2.5V
  • Easier to stabilize with higher capacitive load due to resistive open-loop output impedance
  • Extended temperature range: –40°C to 125°C

The LMV3xxA family includes single (LMV321A), dual (LMV358A), and quad-channel (LMV324A) low-voltage (2.5V to 5.5V) operational amplifiers (op amps) with rail-to-rail output swing capabilities. These op amps provide a cost-effective solution for space-constrained applications such as large appliances, smoke detectors, and personal electronics where low-voltage operation and high capacitive-load drive are required. The capacitive-load drive of the LMV3xxA family is 500pF, and the resistive open-loop output impedance makes stabilization easier with much higher capacitive loads. These op amps are designed specifically for low-voltage operation (2.5V to 5.5V) with performance specifications similar to the LMV3xx devices.

The robust design of the LMV3xxA family simplifies circuit design. The op amps feature unity-gain stability, an integrated RFI and EMI rejection filter, and no-phase reversal in overdrive conditions.

The LMV3xxA family is available in industry-standard packages such as SOIC, MSOP, SOT-23, and TSSOP packages.

The LMV3xxA family includes single (LMV321A), dual (LMV358A), and quad-channel (LMV324A) low-voltage (2.5V to 5.5V) operational amplifiers (op amps) with rail-to-rail output swing capabilities. These op amps provide a cost-effective solution for space-constrained applications such as large appliances, smoke detectors, and personal electronics where low-voltage operation and high capacitive-load drive are required. The capacitive-load drive of the LMV3xxA family is 500pF, and the resistive open-loop output impedance makes stabilization easier with much higher capacitive loads. These op amps are designed specifically for low-voltage operation (2.5V to 5.5V) with performance specifications similar to the LMV3xx devices.

The robust design of the LMV3xxA family simplifies circuit design. The op amps feature unity-gain stability, an integrated RFI and EMI rejection filter, and no-phase reversal in overdrive conditions.

The LMV3xxA family is available in industry-standard packages such as SOIC, MSOP, SOT-23, and TSSOP packages.
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* Data sheet LMV3xxA Low-Voltage Rail-to-Rail Output Operational Amplifiers datasheet (Rev. I) PDF | HTML 2024年 7月 22日
E-book An Engineer’s Guide to Designing with Precision Amplifiers 2021年 4月 29日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

AMP-PDK-EVM — 放大器性能開發套件評估模組

放大器性能開發套件 (PDK) 是一款評估模組 (EVM) 套件，可測試通用運算放大器 (op amp) 參數，並與大多數運算放大器和比較器相容。EVM 套件提供主板和多個插槽式子卡選項，可滿足封裝需求，使工程師能夠快速評估和驗證裝置性能。

AMP-PDK-EVM 套件支援五種最熱門的業界標準封裝，包括：

  • D (SOIC-8 和 SOIC-14)
  • PW (TSSOP-14)
  • DGK (VSSOP-8)
  • DBV (SOT23-5 和 SOT23-6)
  • DCK (SC70-5 和 SC70-6)
使用指南: PDF | HTML
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開發板

DIP-ADAPTER-EVM — DIP 轉接器評估模組

Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.

The (...)

使用指南: PDF
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開發板

DIYAMP-EVM — 通用自製 (DIY) 放大器電路評估模組

The DIYAMP-EVM is a unique evaluation module (EVM) family that provides engineers and do it yourselfers (DIYers) with real-world amplifier circuits, enabling you to quickly evaluate design concepts and verify simulations. It is available in three industry-standard packages (SC70, SOT23, SOIC) and (...)

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模擬型號

LMV321A PSpice Model (Rev. B)

SLOM448B.ZIP (22 KB) - PSpice Model
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模擬型號

LMV321A TINA-TI Reference Design Model

SLOM450.ZIP (42 KB) - TINA-TI Reference Design
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模擬型號

LMV321A TINA-TI Spice Model

SLOM449.ZIP (4 KB) - TINA-TI Spice 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 (...)
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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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封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
SOT-SC70 (DCK) 5 Ultra Librarian
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