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

OPA855

現行

具雙極輸入的 8 GHz 增益頻寬產品、去補償轉阻放大器

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產品規格表

OPA855

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) 3.3 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25 GBW (typ) (MHz) 8000 BW at Acl (MHz) 2500 Acl, min spec gain (V/V) 7 Slew rate (typ) (V/µs) 2750 Vn at flatband (typ) (nV√Hz) 0.98 Vn at 1 kHz (typ) (nV√Hz) 2.8 Iq per channel (typ) (mA) 17.8 Vos (offset voltage at 25°C) (max) (mV) 1.5 Rail-to-rail No Features Decompensated, Shutdown Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 100 Input bias current (max) (pA) 5000000 Offset drift (typ) (µV/°C) 0.5 Iout (typ) (mA) 80 2nd harmonic (dBc) 90 3rd harmonic (dBc) 86 Frequency of harmonic distortion measurement (MHz) 10
Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 3.3 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25 GBW (typ) (MHz) 8000 BW at Acl (MHz) 2500 Acl, min spec gain (V/V) 7 Slew rate (typ) (V/µs) 2750 Vn at flatband (typ) (nV√Hz) 0.98 Vn at 1 kHz (typ) (nV√Hz) 2.8 Iq per channel (typ) (mA) 17.8 Vos (offset voltage at 25°C) (max) (mV) 1.5 Rail-to-rail No Features Decompensated, Shutdown Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 100 Input bias current (max) (pA) 5000000 Offset drift (typ) (µV/°C) 0.5 Iout (typ) (mA) 80 2nd harmonic (dBc) 90 3rd harmonic (dBc) 86 Frequency of harmonic distortion measurement (MHz) 10
DIESALE (Y) — See data sheet WSON (DSG) 8 4 mm² 2 x 2
  • High gain bandwidth product: 8GHz
  • Decompensated, gain ≥ 7V/V (stable)
  • Low input voltage noise: 0.98nV/√Hz
  • Slew rate: 2750V/µs
  • Low Input capacitance:
    • Common-mode: 0.6pF
    • Differential: 0.2pF
  • Wide input common-mode range:
    • 0.4V from positive supply
    • 1.1V from negative supply
  • 3VPP total output swing
  • Supply voltage range: 3.3V to 5.25V
  • Quiescent current: 17.8mA
  • Package: 8-pin WSON
    • Bare die
  • Temperature range: –40°C to +125°C
  • High gain bandwidth product: 8GHz
  • Decompensated, gain ≥ 7V/V (stable)
  • Low input voltage noise: 0.98nV/√Hz
  • Slew rate: 2750V/µs
  • Low Input capacitance:
    • Common-mode: 0.6pF
    • Differential: 0.2pF
  • Wide input common-mode range:
    • 0.4V from positive supply
    • 1.1V from negative supply
  • 3VPP total output swing
  • Supply voltage range: 3.3V to 5.25V
  • Quiescent current: 17.8mA
  • Package: 8-pin WSON
    • Bare die
  • Temperature range: –40°C to +125°C

The OPA855 is a wideband, low-noise operational amplifier with bipolar inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 8GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains of up to tens of kilohms.

The following graph shows the bandwidth and noise performance of the OPA855 as a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated along a bandwidth range extending from dc to the calculated frequency (f) on the left scale. The OPA855 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA855 is optimized to operate in optical time-of-flight (ToF) systems where the OPA855 is used with time-to-digital converters, such as the TDC7201. Use the OPA855 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541 or LMH5401 devices.

The OPA855 is a wideband, low-noise operational amplifier with bipolar inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 8GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains of up to tens of kilohms.

The following graph shows the bandwidth and noise performance of the OPA855 as a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated along a bandwidth range extending from dc to the calculated frequency (f) on the left scale. The OPA855 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA855 is optimized to operate in optical time-of-flight (ToF) systems where the OPA855 is used with time-to-digital converters, such as the TDC7201. Use the OPA855 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541 or LMH5401 devices.
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重要文件 類型 標題 格式選項 日期
* Data sheet OPA855 8GHz Gain Bandwidth Product, Gain of 7V/V Stable, Bipolar Input Amplifier datasheet (Rev. D) PDF | HTML 2025年 5月 1日
White paper 汽車光達簡介 (Rev. D) PDF | HTML 2025年 4月 24日
Circuit design Transimpedance amplifier circuit. (Rev. B) PDF | HTML 2024年 9月 26日
Application brief LiFi: TI High-Speed Products for Optical Wireless Communication PDF | HTML 2023年 8月 7日
Certificate OPA855DSGEVM EU Declaration of Conformity (DoC) 2023年 6月 21日
Application brief Time of Flight and LIDAR - Optical Front End Design (Rev. A) PDF | HTML 2022年 4月 29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
Analog Design Journal Maximizing the dynamic range of analog fronts ends having a transimpedance amp 2019年 6月 14日
Analog Design Journal Easily improve the performance of analog circuits with decompensated amplifiers (Rev. A) 2019年 5月 21日
Technical article What you need to know about transimpedance amplifiers – part 2 PDF | HTML 2016年 9月 1日
Technical article What you need to know about transimpedance amplifiers – part 1 PDF | HTML 2016年 5月 6日
Technical article SPICE it up: How to extract the input capacitance of an op amp (part 3) PDF | HTML 2016年 3月 21日
Application note AN-1604 Decompensated Operational Amplifiers (Rev. B) 2013年 5月 1日
Application note AN-1803 Design Considerations for a Transimpedance Amplifier (Rev. A) 2013年 5月 1日
Application note Transimpedance Considerations for High-Speed Operational Amplifiers 2009年 11月 22日
Application note Compensate Transimpedance Amplifiers Intuitively (Rev. A) 2005年 3月 30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

設計與開發

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開發板

DEM-OPA-WSON8-EVM — 採用 DSG（8 接腳 WSON）封裝中用於單通道運算放大器的未填充評估模組

DEM-OPA-WSON8-EVM 是用於 DSG（8 接腳 WSON）封裝中單通道運算放大器的未組裝評估模組。此 EVM 專為高速性能規格而設計，與增益頻寬超過 1GHz 的放大器相容。
使用指南: PDF
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開發板

OPA855DSGEVM — OPA855DSG 評估模組

OPA855DSG EVM 是採用 DSG (8 針腳 WSON) 封裝之單 OPA855 的評估模組。OPA855DSG EVM 可快速展示放大器的功能性和多元用途。EVM 可透過板載連接器連接至電源、訊號源和測試儀器。預設放大器配置為 7 配置和分離電源的非反相增益。可輕鬆為其他增益及單電源操作進行配置。

使用指南: PDF
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模擬型號

OPA855 TINA-TI Spice Model (Rev. C)

SBOMAP6C.TSC (1816 KB) - TINA-TI Spice Model
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模擬型號

OPA855 Unencrypted PSpice Model Package (Rev. D)

SBOMB43D.ZIP (37 KB) - PSpice Model
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模擬型號

OPA855 Unencrypted TINA-TI Reference Design Package (Rev. C)

SBOMAP7C.TSC (167 KB) - TINA-TI Reference Design
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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。

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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DIESALE (Y) —
WSON (DSG) 8 Ultra Librarian
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