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

OPA818

現行

2.7-GHz、13-V、補償不全 7-V/V、FET 輸入運算放大器

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產品規格表

OPA818

現行
產品規格表 立即訂購

產品詳細資料

Architecture FET / CMOS Input, Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 6 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 13 GBW (typ) (MHz) 2700 BW at Acl (MHz) 765 Acl, min spec gain (V/V) 7 Slew rate (typ) (V/µs) 1400 Vn at flatband (typ) (nV√Hz) 2.2 Vn at 1 kHz (typ) (nV√Hz) 8.5 Iq per channel (typ) (mA) 27.7 Vos (offset voltage at 25°C) (max) (mV) 1.25 Rail-to-rail No Features Decompensated Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 90 Input bias current (max) (pA) 25 Offset drift (typ) (µV/°C) 3 Iout (typ) (mA) 55 2nd harmonic (dBc) -84 3rd harmonic (dBc) -106 Frequency of harmonic distortion measurement (MHz) 1
Architecture FET / CMOS Input, Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 6 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 13 GBW (typ) (MHz) 2700 BW at Acl (MHz) 765 Acl, min spec gain (V/V) 7 Slew rate (typ) (V/µs) 1400 Vn at flatband (typ) (nV√Hz) 2.2 Vn at 1 kHz (typ) (nV√Hz) 8.5 Iq per channel (typ) (mA) 27.7 Vos (offset voltage at 25°C) (max) (mV) 1.25 Rail-to-rail No Features Decompensated Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 90 Input bias current (max) (pA) 25 Offset drift (typ) (µV/°C) 3 Iout (typ) (mA) 55 2nd harmonic (dBc) -84 3rd harmonic (dBc) -106 Frequency of harmonic distortion measurement (MHz) 1
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8 WSON (DRG) 8 9 mm² 3 x 3
  • High speed:
    • Gain-bandwidth product (GBWP): 2.7GHz
    • Bandwidth (G = 7V/V): 765MHz
    • Large-signal bandwidth (2VPP): 400MHz
    • Slew rate: 1400V/µs
  • Decompensated gain: 7V/V stable
  • Low noise:
    • Input voltage noise: 2.2nV/√Hz
    • Input current noise: 3fA/√Hz (f = 10kHz)
  • Input bias current: 4pA (typical)
  • Low input capacitance:
    • Common-mode: 1.9pF
    • Differential mode: 0.5pF
  • Low distortion (G = 7V/V, RL = 1kΩ, VO = 2VPP):
    • HD2, HD3 at 1MHz: –104dBc, –108dBc
    • HD2, HD3 at 50MHz: –57dBc, –72dBc
  • Wide supply range: 6V to 13V
  • Output swing: 8VPP (VS = 10V)
  • Supply current: 27.7mA
  • Shutdown supply current: 27µA
  • Performance upgrade to OPA657
  • High speed:
    • Gain-bandwidth product (GBWP): 2.7GHz
    • Bandwidth (G = 7V/V): 765MHz
    • Large-signal bandwidth (2VPP): 400MHz
    • Slew rate: 1400V/µs
  • Decompensated gain: 7V/V stable
  • Low noise:
    • Input voltage noise: 2.2nV/√Hz
    • Input current noise: 3fA/√Hz (f = 10kHz)
  • Input bias current: 4pA (typical)
  • Low input capacitance:
    • Common-mode: 1.9pF
    • Differential mode: 0.5pF
  • Low distortion (G = 7V/V, RL = 1kΩ, VO = 2VPP):
    • HD2, HD3 at 1MHz: –104dBc, –108dBc
    • HD2, HD3 at 50MHz: –57dBc, –72dBc
  • Wide supply range: 6V to 13V
  • Output swing: 8VPP (VS = 10V)
  • Supply current: 27.7mA
  • Shutdown supply current: 27µA
  • Performance upgrade to OPA657

The OPA818 is a decompensated, voltage-feedback operational amplifier for high-speed and wide-dynamic-range applications. The OPA818 has a low-noise JFET input stage that combines high gain-bandwidth with a wide supply range from 6V to 13V. The fast slew rate (1400V/µs) provides high, large-signal bandwidth and low distortion. This amplifier is manufactured using TI’s proprietary, high-speed, silicon-germanium (SiGe) process to achieve significant performance improvements over other high-speed, FET-input amplifiers.

The OPA818 is an extremely versatile, wideband TIA photodiode amp for use in optical test and communication equipment, and many medical, scientific, and industrial instruments. The OPA818 showcases a 2.7GHz GBWP, low 2.4pF total input capacitance, and 2.2nV/√Hz input noise. The OPA818 achieves over 85MHz signal bandwidth in a TIA configuration with 20kΩ TIA gain (RF) and 0.5pF photodiode capacitance (CD) with wide output swings. The low-noise architecture with picoampere of input bias current is also an excellent choice for test and measurement applications. Though typically stable in gains ≥ 7V/V, the OPA818 is designed for use in applications with lower gains by applying noise-gain shaping techniques.

The OPA818 is available in an 5-pin SOT-23 package and an 8-lead WSON package with an exposed thermal pad for heat dissipation. This device is specified for operation over the industrial temperature range of –40°C to +85°C.

The OPA818 is a decompensated, voltage-feedback operational amplifier for high-speed and wide-dynamic-range applications. The OPA818 has a low-noise JFET input stage that combines high gain-bandwidth with a wide supply range from 6V to 13V. The fast slew rate (1400V/µs) provides high, large-signal bandwidth and low distortion. This amplifier is manufactured using TI’s proprietary, high-speed, silicon-germanium (SiGe) process to achieve significant performance improvements over other high-speed, FET-input amplifiers.

The OPA818 is an extremely versatile, wideband TIA photodiode amp for use in optical test and communication equipment, and many medical, scientific, and industrial instruments. The OPA818 showcases a 2.7GHz GBWP, low 2.4pF total input capacitance, and 2.2nV/√Hz input noise. The OPA818 achieves over 85MHz signal bandwidth in a TIA configuration with 20kΩ TIA gain (RF) and 0.5pF photodiode capacitance (CD) with wide output swings. The low-noise architecture with picoampere of input bias current is also an excellent choice for test and measurement applications. Though typically stable in gains ≥ 7V/V, the OPA818 is designed for use in applications with lower gains by applying noise-gain shaping techniques.

The OPA818 is available in an 5-pin SOT-23 package and an 8-lead WSON package with an exposed thermal pad for heat dissipation. This device is specified for operation over the industrial temperature range of –40°C to +85°C.
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重要文件 類型 標題 格式選項 日期
* Data sheet OPA818 2.7GHz, High-Voltage, FET-Input, Low-Noise, Operational Amplifier datasheet (Rev. B) PDF | HTML 2025年 12月 9日
Application brief Biasing an APD With OPA596 PDF | HTML 2026年 2月 9日
Product overview High Speed Amplifiers for In-Vitro Diagnostics (IVD) Analog Front End PDF | HTML 2025年 4月 10日
Application note High Speed ADCs and Amplifiers for Flow Cytometry Applications 2020年 10月 12日
Technical article 3 common questions when designing with high-speed amplifiers PDF | HTML 2020年 7月 17日
Application note Noise Analysis for High Speed Op Amps (Rev. A) 2005年 1月 17日

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OPA818DRGEVM — OPA818 評估模組

OPA818DRG EVM 是採用 DRG (8 針腳 WSON) 封裝之單 OPA818 的評估模組。OPA818DRG EVM 可快速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。預設的放大器配置為 7 倍非反相增益配置和分離式電源。EVM 可以輕鬆配置為其他增益和單電源操作。
使用指南: PDF
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模擬型號

OPA818 TINA-TI Spice Model (Rev. A)

SBOMAZ1A.TSM (14 KB) - TINA-TI Spice Model
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OPA818 Unencrypted TINA-TI Reference Design Package (Rev. A)

SBOMB21A.TSC (172 KB) - TINA-TI Reference Design
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PSPICE Circuit Containing OPA818 Model (Rev. B)

SBOMB74B.ZIP (31 KB) - PSpice 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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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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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。

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TINA-TI — 基於 SPICE 的類比模擬程式

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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
WSON (DRG) 8 Ultra Librarian
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