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OPA862

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12.6V、低雜訊、單端到差分、高輸入阻抗放大器

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OPA862

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) (min) (V) 3 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12.6 BW at Acl (MHz) 44 Acl, min spec gain (V/V) 2 Slew rate (typ) (V/µs) 140 Architecture Bipolar, Differential Amplifier, High Input Impedance Vn at flatband (typ) (nV√Hz) 2.3 Iq per channel (typ) (mA) 3.1 Rail-to-rail Out Vos (offset voltage at 25°C) (max) (mV) 0.325 Operating temperature range (°C) -40 to 125 Iout (typ) (mA) 60 2nd harmonic (dBc) -122 3rd harmonic (dBc) -140 Frequency of harmonic distortion measurement (MHz) 0.05 GBW (typ) (MHz) 400 Input bias current (max) (pA) 3100000 Features Shutdown CMRR (typ) (dB) 120 Rating Catalog
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 3 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12.6 BW at Acl (MHz) 44 Acl, min spec gain (V/V) 2 Slew rate (typ) (V/µs) 140 Architecture Bipolar, Differential Amplifier, High Input Impedance Vn at flatband (typ) (nV√Hz) 2.3 Iq per channel (typ) (mA) 3.1 Rail-to-rail Out Vos (offset voltage at 25°C) (max) (mV) 0.325 Operating temperature range (°C) -40 to 125 Iout (typ) (mA) 60 2nd harmonic (dBc) -122 3rd harmonic (dBc) -140 Frequency of harmonic distortion measurement (MHz) 0.05 GBW (typ) (MHz) 400 Input bias current (max) (pA) 3100000 Features Shutdown CMRR (typ) (dB) 120 Rating Catalog
SOIC (D) 8 29.4 mm² 4.9 x 6 WSON (DTK) 8 9 mm² 3 x 3
  • Wide Supply Range: 3 V to 12.6 V
  • High Input Impedance: 325 MΩ
  • Voltage Noise:
    • Input-Referred (f ≥ 5 kHz): 2.3 nV/√ Hz
    • Output-Referred (f ≥ 10 kHz): 8.3 nV/√ Hz
  • Differential Output Offset: ±700 µV (Maximum)
  • Output Offset Drift: ±1.5 µV/°C (Typical)
  • A2 Bias Current Cancellation, IB: ±5 nA (Typical)
  • Gain-Bandwidth Product: 400 MHz
  • Small-Signal Bandwidth: 44 MHz (G = 2 V/V)
  • Slew Rate: 140 V/µs
  • HD2, HD3 (VOD = 10 VPP, 50 kHz): –122 dBc, –140 dBc
  • Rail-to-Rail Output:
    • High Linear Output Current: 60 mA (Typical)
  • Quiescent Current: 3.1 mA
  • Disable mode: 12-µA Quiescent Current
  • Extended Temperature Operation: –40°C to +125°C
  • Wide Supply Range: 3 V to 12.6 V
  • High Input Impedance: 325 MΩ
  • Voltage Noise:
    • Input-Referred (f ≥ 5 kHz): 2.3 nV/√ Hz
    • Output-Referred (f ≥ 10 kHz): 8.3 nV/√ Hz
  • Differential Output Offset: ±700 µV (Maximum)
  • Output Offset Drift: ±1.5 µV/°C (Typical)
  • A2 Bias Current Cancellation, IB: ±5 nA (Typical)
  • Gain-Bandwidth Product: 400 MHz
  • Small-Signal Bandwidth: 44 MHz (G = 2 V/V)
  • Slew Rate: 140 V/µs
  • HD2, HD3 (VOD = 10 VPP, 50 kHz): –122 dBc, –140 dBc
  • Rail-to-Rail Output:
    • High Linear Output Current: 60 mA (Typical)
  • Quiescent Current: 3.1 mA
  • Disable mode: 12-µA Quiescent Current
  • Extended Temperature Operation: –40°C to +125°C

The OPA862 is a single-ended to differential analog-to-digital converter (ADC) driver with high input impedance for directly interfacing with sensors. The device only consumes 3.1-mA quiescent current for an output-referred noise density of 8.3 nV/√ Hz in a gain of 2-V/V configuration. A fully differential amplifier configured in a gain of 1 V/V with 1-kΩ resistors must be less than 1 nV/√ Hz to achieve the OPA862 equivalent output-referred noise density of 8.3 nV/√ Hz. The OPA862 can be configured for other gains using external resistors. The device has a large gain-bandwidth product of 400 MHz and a slew rate of 140 V/µs. This yields exceptional linearity and fast-settling, 18-bit performance over comparable single-ended-to-differential ADC drivers. The device includes a reference input pin for setting the output common-mode voltage.

The OPA862 is fully characterized to operate over a wide supply range of 3 V to 12.6 V, and features a rail-to-rail output stage. The device is fabricated using Texas Instruments’ proprietary, high-speed, silicon-germanium (SiGe) process and achieves exceptional distortion performance for 18-bit systems. The device includes a disable mode that consumes only 12-µA quiescent current in power-down state.

The OPA862 is rated to work over the extended industrial temperature range of –40°C to +125°C.

The OPA862 is a single-ended to differential analog-to-digital converter (ADC) driver with high input impedance for directly interfacing with sensors. The device only consumes 3.1-mA quiescent current for an output-referred noise density of 8.3 nV/√ Hz in a gain of 2-V/V configuration. A fully differential amplifier configured in a gain of 1 V/V with 1-kΩ resistors must be less than 1 nV/√ Hz to achieve the OPA862 equivalent output-referred noise density of 8.3 nV/√ Hz. The OPA862 can be configured for other gains using external resistors. The device has a large gain-bandwidth product of 400 MHz and a slew rate of 140 V/µs. This yields exceptional linearity and fast-settling, 18-bit performance over comparable single-ended-to-differential ADC drivers. The device includes a reference input pin for setting the output common-mode voltage.

The OPA862 is fully characterized to operate over a wide supply range of 3 V to 12.6 V, and features a rail-to-rail output stage. The device is fabricated using Texas Instruments’ proprietary, high-speed, silicon-germanium (SiGe) process and achieves exceptional distortion performance for 18-bit systems. The device includes a disable mode that consumes only 12-µA quiescent current in power-down state.

The OPA862 is rated to work over the extended industrial temperature range of –40°C to +125°C.
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重要文件 類型 標題 格式選項 日期
* Data sheet OPA862 High Input Impedance, Single-Ended to Differential ADC Driver datasheet (Rev. C) PDF | HTML 2020年 8月 19日
Application brief Why Use an FDA to Drive an ADC? PDF | HTML 2026年 1月 8日
Application note Noise Analysis for High Speed Op Amps (Rev. A) 2005年 1月 17日

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OPA862DEVM — OPA862 評估模組

OPA862DEVM 是一款採用 D 封裝且適用於單 OPA862 放大器的評估模組。此評估模組可快速且輕鬆展示放大器的功能性和多元用途。EVM 隨時可透過板載連接器來連接電源、訊號源和測試儀器。EVM 已配置為可透過其輸入與輸出，輕鬆連接常見的 50-Ω 實驗室設備。該放大器配置為單端輸入，增益為 4 V/V，並在裝置引腳處輸出差動信號，透過變壓器轉換為單端輸出。EVM 可以輕鬆針對其他增益及單一或分離電源運作進行配置。OPA862DEVM 內建 2kΩ 板載負載以供放大器使用。輸出變壓器與電阻器網路可將此負載轉換為 50Ω 單端輸出。
使用指南: PDF
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OPA862 PSpice Model (Rev. A)

SBOMB77A.ZIP (47 KB) - PSpice Model
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OPA862 TINA-TI Spice Model (Rev. C)

SBOMAZ9C.TSC (34 KB) - TINA-TI Spice Model
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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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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。 

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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 (...)
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