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運算放大器 (op amps)
高速運算放大器 (GBW ≥ 50 MHz)

LMH6645

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單通道 2.7V、650µA、55MHz 軌至軌輸入和輸出放大器

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OPA863 現行 單通道、低功耗、110-MHz、12-V、軌至軌輸入和輸出電壓回饋放大器 Single-channel, higher bandwidth (50 MHz), lower noise (5.9 nV/√Hz), lower offset (1.3 mV), lower offset drift (3.5 µV/C) & lower power consumption (0.7 mA)
OPA863A 現行 單通道、高精密、低功耗、105-MHz、12-V RRIO 電壓反饋放大器 Higher bandwidth (50 MHz), lower noise (5.9 nV/√Hz), lower offset (95 µV), lower offset drift (0.3 µV/°C) and lower power consumption (0.75 mA)

LMH6645

現行
立即訂購

產品詳細資料

Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 40 BW at Acl (MHz) 55 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 22 Vn at flatband (typ) (nV√Hz) 17 Vn at 1 kHz (typ) (nV√Hz) 25 Iq per channel (typ) (mA) 0.725 Vos (offset voltage at 25°C) (max) (mV) 3 Rail-to-rail In, Out Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 84 Input bias current (max) (pA) 2000000 Offset drift (typ) (µV/°C) 5 Iout (typ) (mA) 20 2nd harmonic (dBc) 62 3rd harmonic (dBc) 72 Frequency of harmonic distortion measurement (MHz) 1
Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 40 BW at Acl (MHz) 55 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 22 Vn at flatband (typ) (nV√Hz) 17 Vn at 1 kHz (typ) (nV√Hz) 25 Iq per channel (typ) (mA) 0.725 Vos (offset voltage at 25°C) (max) (mV) 3 Rail-to-rail In, Out Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 84 Input bias current (max) (pA) 2000000 Offset drift (typ) (µV/°C) 5 Iout (typ) (mA) 20 2nd harmonic (dBc) 62 3rd harmonic (dBc) 72 Frequency of harmonic distortion measurement (MHz) 1
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm)
  • (VS = 2.7V, TA = 25°C, RL = 1kΩ to V+/2, AV = +1.
    Typical Values Unless Specified.
  • −3dB BW 55 MHz
  • Supply Voltage Range 2.5 V to 12 V
  • Slew Rate 22 V/µs
  • Supply Current 650 µA/channel
  • Output Short Circuit Current 42 mA
  • Linear Output Current ±20 mA
  • Input Common Mode Voltage 0.3 V Beyond Rails
  • Output Voltage Swing 20 mV from Rails 
  • Input Voltage Noise 17 nV/√Hz
  • Input Current Noise 0.75 pA/√Hz
  • (VS = 2.7V, TA = 25°C, RL = 1kΩ to V+/2, AV = +1.
    Typical Values Unless Specified.
  • −3dB BW 55 MHz
  • Supply Voltage Range 2.5 V to 12 V
  • Slew Rate 22 V/µs
  • Supply Current 650 µA/channel
  • Output Short Circuit Current 42 mA
  • Linear Output Current ±20 mA
  • Input Common Mode Voltage 0.3 V Beyond Rails
  • Output Voltage Swing 20 mV from Rails 
  • Input Voltage Noise 17 nV/√Hz
  • Input Current Noise 0.75 pA/√Hz

The LMH6645 (single) and LMH6646 (dual), rail-to-rail input and output voltage feedback amplifiers, offer high speed (55 MHz), and low voltage operation (2.7 V) in addition to micro-power shutdown capability (LMH6647, single).

Input common mode voltage range exceeds either supply by 0.3 V, enhancing ease of use in multitude of applications where previously only inferior devices could be used. Output voltage range extends to within 20 mV of either supply rails, allowing wide dynamic range especially in low voltage applications. Even with low supply current of 650 µA/amplifier, output current capability is kept at a respectable ±20 mA for driving heavier loads. Important device parameters such as BW, Slew Rate and output current are kept relatively independent of the operating supply voltage by a combination of process enhancements and design architecture.

In portable applications, the LMH6647 provides shutdown capability while keeping the turn-off current to less than 50 µA. Both turn-on and turn-off characteristics are well behaved with minimal output fluctuations during transitions. This allows the part to be used in power saving mode, as well as multiplexing applications. Miniature packages (SOT-23, VSSOP-8, and SOIC-8) are further means to ease the adoption of these low power high speed devices in applications where board area is at a premium.

The LMH6645 (single) and LMH6646 (dual), rail-to-rail input and output voltage feedback amplifiers, offer high speed (55 MHz), and low voltage operation (2.7 V) in addition to micro-power shutdown capability (LMH6647, single).

Input common mode voltage range exceeds either supply by 0.3 V, enhancing ease of use in multitude of applications where previously only inferior devices could be used. Output voltage range extends to within 20 mV of either supply rails, allowing wide dynamic range especially in low voltage applications. Even with low supply current of 650 µA/amplifier, output current capability is kept at a respectable ±20 mA for driving heavier loads. Important device parameters such as BW, Slew Rate and output current are kept relatively independent of the operating supply voltage by a combination of process enhancements and design architecture.

In portable applications, the LMH6647 provides shutdown capability while keeping the turn-off current to less than 50 µA. Both turn-on and turn-off characteristics are well behaved with minimal output fluctuations during transitions. This allows the part to be used in power saving mode, as well as multiplexing applications. Miniature packages (SOT-23, VSSOP-8, and SOIC-8) are further means to ease the adoption of these low power high speed devices in applications where board area is at a premium.
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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 LMH664x 2.7 V, 650 uA, 55 MHz, Rail-to-Rail I/O Amplifiers w/Shutdown Option datasheet (Rev. D) PDF | HTML 2014/11/25
電子書 The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML 2017/3/28
設計指南 High-Precision Reference Design for Buffering a DAC Signal 2017/2/3
更多文件說明 Amplifiers for Displays 2013/7/8
應用說明 AN-1515 A Comprehensive Study of the Howland Current Pump (Rev. A) 2013/4/26

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開發板

LMH730216 — 適用於採用 5-6 針腳 SOT-23 封裝的高速單運算放大器的評估板

Texas Instruments offers this unpopulated Evaluation Board to aid in the evaluation and testing of high-speed Op Amps that are offered in the 5-/6-pin SOT-23 package. Resistors, capacitors, or any other surface-mount components can be easily mounted on this board in the desired circuit (...)

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開發板

LMH730227 — 適用於採用 8 針腳 SOIC 封裝的高速單運算放大器的評估板

Texas Instruments offers this unpopulated Evaluation Board to aid in the evaluation and testing of high-speed Op Amp that are offered in the 8-Pin SOIC package. Resistors, capacitors, or any other surface-mount components can be easily mounted on this board in the desired circuit configuration. The (...)

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模擬型號

LMH6645 PSPICE Model

SNOM138.ZIP (2 KB) - PSpice 模型
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOIC (D) 8 Ultra Librarian
SOT-23 (DBV) 5 Ultra Librarian
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