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

OPA2891

現行

具有超低總諧波失真 (THD) 的雙通道 180MHz 0.95nV√Hz 運算放大器

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OPA2891

現行
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產品詳細資料

Architecture Voltage FB Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 9 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 GBW (typ) (MHz) 180 BW at Acl (MHz) 180 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 105 Vn at flatband (typ) (nV√Hz) 0.95 Vn at 1 kHz (typ) (nV√Hz) 1 Iq per channel (typ) (mA) 7.5 Vos (offset voltage at 25°C) (max) (mV) 1 Rail-to-rail No Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 106 Input bias current (max) (pA) 20000000 Offset drift (typ) (µV/°C) 1 Iout (typ) (mA) 200 2nd harmonic (dBc) 91 3rd harmonic (dBc) 91 Frequency of harmonic distortion measurement (MHz) 1
Architecture Voltage FB Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 9 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 GBW (typ) (MHz) 180 BW at Acl (MHz) 180 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 105 Vn at flatband (typ) (nV√Hz) 0.95 Vn at 1 kHz (typ) (nV√Hz) 1 Iq per channel (typ) (mA) 7.5 Vos (offset voltage at 25°C) (max) (mV) 1 Rail-to-rail No Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 106 Input bias current (max) (pA) 20000000 Offset drift (typ) (µV/°C) 1 Iout (typ) (mA) 200 2nd harmonic (dBc) 91 3rd harmonic (dBc) 91 Frequency of harmonic distortion measurement (MHz) 1
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9 SOIC (D) 8 29.4 mm² 4.9 x 6
  • Ultra-low 0.95nV/√Hz voltage noise
  • High speed:
    • 180MHz unity gain bandwidth
    • 140MHz bandwidth at a gain of 2V/V (–1V/V)
    • 105V/µs slew rate
  • Very low distortion
    • THD = –91dBc (f = 1MHz, RL = 150Ω)
    • THD = –100dBc (f = 1MHz, RL = 1kΩ)
    • THD+N = –137dBc (f = 1kHz, BW = 80kHz)
  • Low 0.2mV (typical) and 1mV (maximum) input offset voltage at 25°C
  • 200mA output current drive (typical)
  • Typical operation from ±4.5V to ±18V
  • Offset nulling pins on the OPA891
  • Ultra-low 0.95nV/√Hz voltage noise
  • High speed:
    • 180MHz unity gain bandwidth
    • 140MHz bandwidth at a gain of 2V/V (–1V/V)
    • 105V/µs slew rate
  • Very low distortion
    • THD = –91dBc (f = 1MHz, RL = 150Ω)
    • THD = –100dBc (f = 1MHz, RL = 1kΩ)
    • THD+N = –137dBc (f = 1kHz, BW = 80kHz)
  • Low 0.2mV (typical) and 1mV (maximum) input offset voltage at 25°C
  • 200mA output current drive (typical)
  • Typical operation from ±4.5V to ±18V
  • Offset nulling pins on the OPA891

The OPA891 and OPA2891 (OPAx891) are ultra-low voltage noise, high-speed voltage feedback amplifiers that are an excellent choice for applications requiring low voltage noise, including communications and imaging. The single-amplifier OPA891 and the dual-amplifier OPA2891 offer very good ac performance with 140MHz bandwidth, gain (G) = 2V/V, 105V/µs slew rate, and 70ns settling time (0.1%). The OPAx891 are unity-gain stable with 180MHz bandwidth. These amplifiers have a high drive capability of 200mA and draw only 7.5mA supply current per channel. With –100dBc of total harmonic distortion (THD) at f = 1MHz and a very low noise of 0.95nV/√Hz, the OPAx891 are designed for applications requiring low distortion and low noise such as buffering analog-to-digital converters.

The OPA891 and OPA2891 (OPAx891) are ultra-low voltage noise, high-speed voltage feedback amplifiers that are an excellent choice for applications requiring low voltage noise, including communications and imaging. The single-amplifier OPA891 and the dual-amplifier OPA2891 offer very good ac performance with 140MHz bandwidth, gain (G) = 2V/V, 105V/µs slew rate, and 70ns settling time (0.1%). The OPAx891 are unity-gain stable with 180MHz bandwidth. These amplifiers have a high drive capability of 200mA and draw only 7.5mA supply current per channel. With –100dBc of total harmonic distortion (THD) at f = 1MHz and a very low noise of 0.95nV/√Hz, the OPAx891 are designed for applications requiring low distortion and low noise such as buffering analog-to-digital converters.
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* Data sheet OPAx891 180MHz, 0.95nV/√Hz, Ultra-Low THD Operational Amplifiers datasheet (Rev. B) PDF | HTML 2024年 7月 23日

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DEM-OPA-MSOP-2A — 適用於 MSOP-8 封裝的二路運算放大器評估模組

The DEM-OPA-MSOP-2A demonstration fixture helps designers evaluate the operation and performance of TI's dual, high speed, wideband operational amplifiers. This unpopulated PC board is compatible with products offered in the 8-lead MSOP (DGK) package.
 
For more information on these types of op amps, (...)
使用指南: PDF
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DEM-OPA-SO-2A — 適用於 SO-8 封裝的二路運算放大器評估模組

The DEM-OPA-SO-2A demonstration evaluation module helps designers evaluate the operation and performance of TI dual-channel, high-speed, wideband operational amplifiers. This unpopulated printed-circuit board (PCB) is compatible with products offered in the 8-lead SOIC (D) package.

For more (...)

使用指南: PDF
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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 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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