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

OPA847

現行

具有關機功能的寬頻、超低雜訊、電壓回饋運算放大器

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產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的裝置不同
OPA892 現行 具有超低總諧波失真 (THD) 的 2GHz 10V/V 穩定 0.95nV√Hz 運算放大器 Wider Voltage (36 V), lower Iq (7.5 mA), lower offset drift (1 µV/°C), and lower THD + N ( -114 dB)

OPA847

現行
產品規格表 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) 10 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 3900 BW at Acl (MHz) 600 Acl, min spec gain (V/V) 12 Slew rate (typ) (V/µs) 950 Vn at flatband (typ) (nV√Hz) 0.85 Vn at 1 kHz (typ) (nV√Hz) 1.4 Iq per channel (typ) (mA) 18.1 Vos (offset voltage at 25°C) (max) (mV) 0.6 Rail-to-rail No Features Decompensated, Shutdown Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 110 Input bias current (max) (pA) 39000000 Offset drift (typ) (µV/°C) 0.25 Iout (typ) (mA) 75 2nd harmonic (dBc) 74 3rd harmonic (dBc) 103 Frequency of harmonic distortion measurement (MHz) 5
Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 10 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 3900 BW at Acl (MHz) 600 Acl, min spec gain (V/V) 12 Slew rate (typ) (V/µs) 950 Vn at flatband (typ) (nV√Hz) 0.85 Vn at 1 kHz (typ) (nV√Hz) 1.4 Iq per channel (typ) (mA) 18.1 Vos (offset voltage at 25°C) (max) (mV) 0.6 Rail-to-rail No Features Decompensated, Shutdown Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 110 Input bias current (max) (pA) 39000000 Offset drift (typ) (µV/°C) 0.25 Iout (typ) (mA) 75 2nd harmonic (dBc) 74 3rd harmonic (dBc) 103 Frequency of harmonic distortion measurement (MHz) 5
SOIC (D) 8 29.4 mm² 4.9 x 6 SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • HIGH GAIN BANDWIDTH: 3.9GHz
  • LOW INPUT VOLTAGE NOISE: 0.85nV/√Hz
  • VERY LOW DISTORTION: –105dBc (5MHz)
  • HIGH SLEW RATE: 950V/µs
  • HIGH DC ACCURACY: VIO < ±100µV
  • LOW SUPPLY CURRENT: 18.1mA
  • LOW SHUTDOWN POWER: 2mW
  • STABLE FOR GAINS 12
  • APPLICATIONS
    • HIGH DYNAMIC RANGE ADC PREAMPS
    • LOW NOISE, WIDEBAND, TRANSIMPEDANCE AMPLIFIERS
    • WIDEBAND, HIGH GAIN AMPLIFIERS
    • LOW NOISE DIFFERENTIAL RECEIVERS
    • ULTRASOUND CHANNEL AMPLIFIERS
    • IMPROVED UPGRADE FOR THE OPA687, CLC425, AND LMH6642

All trademarks are the property of their respective owners.
  • HIGH GAIN BANDWIDTH: 3.9GHz
  • LOW INPUT VOLTAGE NOISE: 0.85nV/√Hz
  • VERY LOW DISTORTION: –105dBc (5MHz)
  • HIGH SLEW RATE: 950V/µs
  • HIGH DC ACCURACY: VIO < ±100µV
  • LOW SUPPLY CURRENT: 18.1mA
  • LOW SHUTDOWN POWER: 2mW
  • STABLE FOR GAINS 12
  • APPLICATIONS
    • HIGH DYNAMIC RANGE ADC PREAMPS
    • LOW NOISE, WIDEBAND, TRANSIMPEDANCE AMPLIFIERS
    • WIDEBAND, HIGH GAIN AMPLIFIERS
    • LOW NOISE DIFFERENTIAL RECEIVERS
    • ULTRASOUND CHANNEL AMPLIFIERS
    • IMPROVED UPGRADE FOR THE OPA687, CLC425, AND LMH6642

All trademarks are the property of their respective owners.

The OPA847 combines very high gain bandwidth and large signal performance with an ultra-low input noise voltage (0.85nV/√Hz) while using only 18mA supply current. Where power saving is critical, the OPA847 also includes an optional power shutdown pin that, when pulled low, disables the amplifier and decreases the supply current to < 1% of the powered-up value. This optional feature may be left disconnected to ensure normal amplifier operation when no power-down is required.

The combination of very low input voltage and current noise, along with a 3.9GHz gain bandwidth product, make the OPA847 an ideal amplifier for wideband transimpedance applications. As a voltage gain stage, the OPA847 is optimized for a flat frequency response at a gain of +20V/V and is stable down to gains as low as +12V/V. New external compensation techniques allow the OPA847 to be used at any inverting gain with excellent frequency response control. Using this technique in a differential Analog-to-Digital Converter (ADC) interface application, shown below, can deliver one of the highest dynamic range interfaces available.

The OPA847 combines very high gain bandwidth and large signal performance with an ultra-low input noise voltage (0.85nV/√Hz) while using only 18mA supply current. Where power saving is critical, the OPA847 also includes an optional power shutdown pin that, when pulled low, disables the amplifier and decreases the supply current to < 1% of the powered-up value. This optional feature may be left disconnected to ensure normal amplifier operation when no power-down is required.

The combination of very low input voltage and current noise, along with a 3.9GHz gain bandwidth product, make the OPA847 an ideal amplifier for wideband transimpedance applications. As a voltage gain stage, the OPA847 is optimized for a flat frequency response at a gain of +20V/V and is stable down to gains as low as +12V/V. New external compensation techniques allow the OPA847 to be used at any inverting gain with excellent frequency response control. Using this technique in a differential Analog-to-Digital Converter (ADC) interface application, shown below, can deliver one of the highest dynamic range interfaces available.
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技術文件

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重要文件 類型 標題 格式選項 日期
* Data sheet Wideband, Ultra Low-Noise, Voltage-Feedback Operational Amplifier with Shutdown datasheet (Rev. E) 2008年 12月 30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 RLC Filter Design for ADC Interface Applications (Rev. A) 2015年 5月 13日
User guide DEM-OPA-SO-1A User's Guide (Rev. B) 2012年 4月 12日
User guide DEM-OPA-SO-1B User's Guide (Rev. D) 2012年 4月 12日
User guide DEM-OPA-SOT-1A User's Guide (Rev. B) 2012年 4月 12日
Application note Transimpedance Considerations for High-Speed Operational Amplifiers 2009年 11月 22日
User guide Voltage-Controlled Amplifier Evaluation Kit 2008年 8月 25日
User guide DEM-OPA-SOT-1B User's Guide (Rev. B) 2006年 4月 12日
Analog Design Journal Low-power, high-intercept interface to the ADS5424, 105-MSPS converter 2005年 10月 10日
Analog Design Journal Using a decompensated op amp for improved performance 2005年 3月 11日
Application note Noise Analysis for High Speed Op Amps (Rev. A) 2005年 1月 17日
Application note ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers 2004年 4月 22日
Application note Measuring Board Parasitics in High-Speed Analog Design 2003年 7月 7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

DEM-OPA-SO-1B — 適用於 SO-8 (非反相) 封裝的單路運算放大器評估模組

The DEM-OPA-SO-1B demonstration fixture in the non-inverting configuration helps designers evaluate the operation and performance of TI's single high speed, wideband operational amplifiers. This unpopulated PC board is compatible with products offered in the 8-lead SOIC (D) package.

For more (...)

使用指南: PDF
TI.com 無法提供
開發板

DEM-OPA-SOT-1B — 適用於 SOT23-5/6 (非反相) 封裝的單路運算放大器評估模組

The DEM-OPA-SOT-1B demonstration fixture in the non-inverting configuration helps designers evaluate the operation and performance of TI's single high speed, wideband operational amplifiers. This unpopulated PC board is compatible with products offered in the SOT23 (DBV) package.

使用指南: PDF
TI.com 無法提供
模擬型號

OPA847 ADS Model

SBOJ018.ZIP (54 KB) - Spice Model
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模擬型號

OPA847 PSpice Model

SBOC037.ZIP (1 KB) - PSpice Model
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模擬型號

OPA847 PSpice Model (Rev. A)

SBOC037A.ZIP (2 KB) - PSpice Model
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模擬型號

OPA847 TINA-TI Reference Design (Rev. C)

SBOC098C.TSC (54 KB) - TINA-TI Reference Design
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模擬型號

OPA847 TINA-TI Spice Model (Rev. A)

SBOM180A.ZIP (6 KB) - TINA-TI Spice Model
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計算工具

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

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 operational-amplifier (...)

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計算工具

VOLT-DIVIDER-CALC — Voltage divider calculation tool

The voltage divider calculation tool (VOLT-DIVIDER-CALC) quickly determines a set of resistors for a voltage divider. This KnowledgeBase JavaScript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. VOLT-DIVIDER-CALC can also be used to (...)
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模擬工具

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

PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。 

在 PSpice for TI 設計與模擬工具中，您可以搜尋 TI (...)
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
View Options
參考設計

TIPD147 — 適用於示波器或頻譜分析儀的雜訊量測後置放大器

In some cases a scope or spectrum analyzer does not have the range required to measure very small noise levels.  This noise measurement post-amp boosts the output noise of the device under test (DUT) to allow for measurement with standard test equipment. The key requirements of this circuit is (...)
使用指南: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOIC (D) 8 Ultra Librarian
SOT-23 (DBV) 6 Ultra Librarian
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