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OPA955

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具有雙極輸入的 11GHz 增益頻寬、補償不全的轉阻放大器

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OPA955

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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) 11000 BW at Acl (MHz) 2500 Acl, min spec gain (V/V) 7 Slew rate (typ) (V/µs) 2750 Vn at flatband (typ) (nV√Hz) 0.79 Vn at 1 kHz (typ) (nV√Hz) 1.6 Iq per channel (typ) (mA) 20.2 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) 86 Input bias current (max) (pA) 100000 Offset drift (typ) (µV/°C) 1 Iout (typ) (mA) 80 2nd harmonic (dBc) 79 3rd harmonic (dBc) 88 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) 11000 BW at Acl (MHz) 2500 Acl, min spec gain (V/V) 7 Slew rate (typ) (V/µs) 2750 Vn at flatband (typ) (nV√Hz) 0.79 Vn at 1 kHz (typ) (nV√Hz) 1.6 Iq per channel (typ) (mA) 20.2 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) 86 Input bias current (max) (pA) 100000 Offset drift (typ) (µV/°C) 1 Iout (typ) (mA) 80 2nd harmonic (dBc) 79 3rd harmonic (dBc) 88 Frequency of harmonic distortion measurement (MHz) 10
WSON (DSG) 8 4 mm² (2 mm × 2 mm)
  • High gain bandwidth product: 11GHz
  • Decompensated, gain ≥ 7V/V (stable)
  • Ultra low input voltage noise: 0.79nV/√Hz
  • Slew rate: 3750V/µs
  • Low input capacitance:
    • Common-mode: 0.9pF
    • 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: 20.2mA
  • Package: 8-pin WSON
  • Temperature range: –40°C to +125°C
  • High gain bandwidth product: 11GHz
  • Decompensated, gain ≥ 7V/V (stable)
  • Ultra low input voltage noise: 0.79nV/√Hz
  • Slew rate: 3750V/µs
  • Low input capacitance:
    • Common-mode: 0.9pF
    • 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: 20.2mA
  • Package: 8-pin WSON
  • Temperature range: –40°C to +125°C

The OPA955 is a wideband, ultra-low noise operational amplifier with bipolar inputs for wideband transimpedance and voltage feedback amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 11GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains up to tens of kilohms. The following graphs show the transimpedance bandwidth and transimpedance pulse response performance of the OPA955 in low-capacitance photodiode (PD) applications.

The OPA955 is a viable amplifier for wideband transimpedance applications, high-speed data acquisition systems, and applications with weak signal inputs that require ultra-low noise and high-gain front ends. For example, the OPA955 can operate in optical time-of-flight (ToF) systems along with time-to-digital converters, such as the TDC7201, and integrated laser drivers, such as the LMH13000. The OPA955 can also be used 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. For optimized frequency respone, the OPA955 package has a feedback pin (FB) that simplifies the feedback network connection between the input and output.

The OPA955 is a wideband, ultra-low noise operational amplifier with bipolar inputs for wideband transimpedance and voltage feedback amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 11GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains up to tens of kilohms. The following graphs show the transimpedance bandwidth and transimpedance pulse response performance of the OPA955 in low-capacitance photodiode (PD) applications.

The OPA955 is a viable amplifier for wideband transimpedance applications, high-speed data acquisition systems, and applications with weak signal inputs that require ultra-low noise and high-gain front ends. For example, the OPA955 can operate in optical time-of-flight (ToF) systems along with time-to-digital converters, such as the TDC7201, and integrated laser drivers, such as the LMH13000. The OPA955 can also be used 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. For optimized frequency respone, the OPA955 package has a feedback pin (FB) that simplifies the feedback network connection between the input and output.
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* 資料表 OPA955 11GHz Gain Bandwidth Product, Gain of 7V/V Stable, Bipolar Input Amplifier datasheet PDF | HTML 2026/7/15

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開發板

DEM-OPA-WSON8-EVM — 適用於 8 接腳 WSON (DSG) 封裝單通道運算放大器的未組裝評估模組

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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模擬型號

OPA955 TINA-TI Reference Design

SLOM543 (1043 KB) - TINA-TI 參考設計
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模擬型號

OPA955 TINA-TI SPICE Model

SLOM544.ZIP (7 KB) - TINA-TI Spice 模型
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計算工具

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

類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。

除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。

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WSON (DSG) 8 Ultra Librarian
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