THS4281

正在供货

超低功耗、高速、轨到轨输入/输出、电压反馈运算放大器

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功能与比较器件相同且具有相同引脚。
OPA863A 正在供货 单通道、高精度、低功耗、105MHz、12V RRIO 电压反馈放大器 Lower Iq (0.75 mA), lower noise (5.9 nV/√Hz) and higher precision (95 uV/C)

产品详情

Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 16.5 GBW (typ) (MHz) 50 BW at Acl (MHz) 95 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 35 Vn at flatband (typ) (nV√Hz) 12.5 Vn at 1 kHz (typ) (nV√Hz) 12.5 Iq per channel (typ) (mA) 0.8 Vos (offset voltage at 25°C) (max) (mV) 2.5 Rail-to-rail In, Out Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 107 Input bias current (max) (pA) 800000 Offset drift (typ) (µV/°C) 7 Iout (typ) (mA) 30 2nd harmonic (dBc) 69 3rd harmonic (dBc) 76 Frequency of harmonic distortion measurement (MHz) 1
Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 16.5 GBW (typ) (MHz) 50 BW at Acl (MHz) 95 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 35 Vn at flatband (typ) (nV√Hz) 12.5 Vn at 1 kHz (typ) (nV√Hz) 12.5 Iq per channel (typ) (mA) 0.8 Vos (offset voltage at 25°C) (max) (mV) 2.5 Rail-to-rail In, Out Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 107 Input bias current (max) (pA) 800000 Offset drift (typ) (µV/°C) 7 Iout (typ) (mA) 30 2nd harmonic (dBc) 69 3rd harmonic (dBc) 76 Frequency of harmonic distortion measurement (MHz) 1
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm) VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • Very Low Quiescent Current: 750 µA (at 5 V)
  • Rail-to-Rail Input and Output:
    • Common-Mode Input Voltage Extends
      400 mV Beyond the Rails
    • Output Swings Within 150 mV From the Rails
  • Wide –3-dB Bandwidth at 5 V:
    • 90 MHz at Gain = +1, 40 MHz at Gain = +2
  • High Slew Rate: 35 V/µs
  • Fast Settling Time (2-V Step):
    • 78 ns to 0.1%
    • 150 ns to 0.01%
  • Low Distortion at Gain = +2, VO = 2-VPP, 5 V:
    • –91 dBc at 100 kHz, –67 dBc at 1 MHz
  • Input Offset Voltage: 2.5 mV (Max at +25°C)
  • Output Current > 30 mA (10-Ω Load, 5 V)
  • Low Voltage Noise of 12.5 nV/√Hz
  • Supply Voltages: +2.7 V, 3 V, +5 V, ±5 V, +15 V
  • Packages: SOT23, MSOP, and SOIC
  • APPLICATIONS
    • Portable/Battery-Powered Applications
    • High Channel Count Systems
    • ADC Buffer
    • Active Filters
    • Current Sensing

All other trademarks are the property of their respective owners.

  • Very Low Quiescent Current: 750 µA (at 5 V)
  • Rail-to-Rail Input and Output:
    • Common-Mode Input Voltage Extends
      400 mV Beyond the Rails
    • Output Swings Within 150 mV From the Rails
  • Wide –3-dB Bandwidth at 5 V:
    • 90 MHz at Gain = +1, 40 MHz at Gain = +2
  • High Slew Rate: 35 V/µs
  • Fast Settling Time (2-V Step):
    • 78 ns to 0.1%
    • 150 ns to 0.01%
  • Low Distortion at Gain = +2, VO = 2-VPP, 5 V:
    • –91 dBc at 100 kHz, –67 dBc at 1 MHz
  • Input Offset Voltage: 2.5 mV (Max at +25°C)
  • Output Current > 30 mA (10-Ω Load, 5 V)
  • Low Voltage Noise of 12.5 nV/√Hz
  • Supply Voltages: +2.7 V, 3 V, +5 V, ±5 V, +15 V
  • Packages: SOT23, MSOP, and SOIC
  • APPLICATIONS
    • Portable/Battery-Powered Applications
    • High Channel Count Systems
    • ADC Buffer
    • Active Filters
    • Current Sensing

All other trademarks are the property of their respective owners.

Fabricated using the BiCom-II process, the THS4281 is a low-power, rail-to-rail input and output, voltage-feedback operational amplifier designed to operate over a wide power-supply range of 2.7-V to 15-V single supply, and ±1.35-V to ±7.5-V dual supply. Consuming only 750 µA with a unity gain bandwidth of 90 MHz and a high 35-V/µs slew rate, the THS4281 allows portable or other power-sensitive applications to realize high performance with minimal power. To ensure long battery life in portable applications, the quiescent current is trimmed to be less than 900 µA at +25°C, and 1 mA from –40°C to +85°C.

The THS4281 is a true single-supply amplifier with a specified common-mode input range of 400 mV beyond the rails. This allows for high-side current sensing applications without phase reversal concerns. Its output swings to within 40 mV from the rails with 10-kΩ loads, and 150 mV from the rails with 1-kΩ loads.

The THS4281 has a good 0.1% settling time of 78 ns, and 0.01% settling time of 150 ns. The low THD of –87 dBc at 100 kHz, coupled with a maximum offset voltage of less than 2.5 mV, makes the THS4281 a good match for high-resolution ADCs sampling less than 2 MSPS.

The THS4281 is offered in a space-saving SOT23-5 package, a small MSOP-8 package, and the industry standard SOIC-8 package.

Fabricated using the BiCom-II process, the THS4281 is a low-power, rail-to-rail input and output, voltage-feedback operational amplifier designed to operate over a wide power-supply range of 2.7-V to 15-V single supply, and ±1.35-V to ±7.5-V dual supply. Consuming only 750 µA with a unity gain bandwidth of 90 MHz and a high 35-V/µs slew rate, the THS4281 allows portable or other power-sensitive applications to realize high performance with minimal power. To ensure long battery life in portable applications, the quiescent current is trimmed to be less than 900 µA at +25°C, and 1 mA from –40°C to +85°C.

The THS4281 is a true single-supply amplifier with a specified common-mode input range of 400 mV beyond the rails. This allows for high-side current sensing applications without phase reversal concerns. Its output swings to within 40 mV from the rails with 10-kΩ loads, and 150 mV from the rails with 1-kΩ loads.

The THS4281 has a good 0.1% settling time of 78 ns, and 0.01% settling time of 150 ns. The low THD of –87 dBc at 100 kHz, coupled with a maximum offset voltage of less than 2.5 mV, makes the THS4281 a good match for high-resolution ADCs sampling less than 2 MSPS.

The THS4281 is offered in a space-saving SOT23-5 package, a small MSOP-8 package, and the industry standard SOIC-8 package.

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设计与开发

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仿真模型

THS4281 PSpice Model (Rev. B)

SLOC047B.ZIP (54 KB) - PSpice 模型
支持的产品和硬件
仿真模型

THS4281 TINA-TI Reference Design

SLOM442.TSC (67 KB) - TINA-TI 参考设计
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仿真模型

THS4281 TINA-TI Spice Model

SLOM443.ZIP (14 KB) - TINA-TI Spice 模型
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参考设计

TIPD112 — 用于 MUX 和 阶跃输入 18 位、1uS 满刻度响应的数据采集

此 验证设计是一种使用 18 位 SAR ADC ADS8881 的高性能数据采集系统 (DAQ),吞吐量为 1MSPS。此设计已经过优化,可以为满标量程步进输入信号提供 18 位趋稳性能,从而获得出色的系统线性度。在多路复用应用中,这种输入激励更适用于具有差动输入电压的通道之间的转换。ADC 的输入驱动器使用 OPA350 以实现高带宽(小信号和大信号)、输出电流驱动以及线性轨至轨输入和输出操作。基准缓冲器驱动器利用由 THS4281 和 OPA333 构成的复合缓冲器在最低功耗下实现所需的性能。此 DAQ 块可实现 ±2.5LSB INL 性能,总功耗低于 70 mW。

支持的产品和硬件
参考设计

TIPD113 — 10kHz 交流、35mW、18 位、1Msps 条件下的数据采集

此 验证设计是一种使用 18 位 SAR ADC ADS8881 的高性能数据采集系统 (DAQ),吞吐量为 1MSPS。此设计已经过优化,可以提供适用于 10 KHz 满标量程输入正弦波的最低功耗解决方案。此设计已经过优化,总功耗低于 35mW,可实现高于 16 位于有效分辨率。ADC 的输入驱动器使用 OPA320 以实现低功耗、低噪声和线性轨至轨输入和输出操作。基准缓冲器驱动器利用由 THS4281 和 OPA333 构成的复合缓冲器在最低功耗下实现所需的性能。

支持的产品和硬件
参考设计

TIPD115 — 优化为最低失真、最低噪声、18 位、1Msps 的数据采集

此 验证设计是一种使用 18 位 SAR ADC ADS8881 的高性能数据采集系统 (DAQ),吞吐量为 1MSPS。此设计已经过优化,可为 10 KHz 满标量程输入正弦波提供具有最低噪声和失真度的解决方案。这样可实现在总功耗低于 50mW 时,有效位数 (ENOB) 达到最大可能值。ADC 的输入驱动器使用全差动 THS4521 实现极低的失真度、噪声和较高的小信号带宽。基准缓冲器驱动器利用由 THS4281 和 OPA333 构成的复合缓冲器在最低功耗下实现所需的性能。

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参考设计

TIPD149 — 针对最低失真和噪声进行功耗优化的 16 位 1MSPS 数据采集块参考设计

此 TI 精选设计实现了一款高精度、16 位、1MSPS 数据采集系统,适用于数字音频等需要极低失真和噪声前端系统的应用。该电路采用高性能逐次逼近寄存器模数转换器 (SAR ADC),并经过优化,可在不过多增加功耗的前提下提供出色的动态性能。

支持的产品和硬件
参考设计

TIPD169 — 16 位 1MSPS 多路复用数据采集参考设计

此设计适用于针对直流输入的 16 位 1MSPS 单端多路复用数据采集系统 (DAQ)。该系统由 16 位逐次逼近寄存器 (SAR) 模数转换器 (ADC)、SAR ADC 驱动器、基准驱动器和多路复用器组成。此设计展示了优化单端 DAQ 以在 1MSPS 的采样速率下实现快速趋稳的过程。

支持的产品和硬件
参考设计

TIPD173 — 用于单端多路复用应用的 16 位 1MSPS 数据采集参考设计

此 TI 高精度精选设计详细介绍了一种针对 16 位、1MSPS、单端数据采集 (DAQ) 模块的系统设计方法,该模块针对多路复用应用进行了优化,可实现出色的建立时间、功耗、静态性能和动态性能。  该设计包含一个 16 位高精度连续逼近型寄存器 (SAR) 模数转换器 (ADC);低噪声、低功耗、宽带宽 ADC 输入驱动电路;以及一个极低漂移 ADC 电压基准和相应的基准输入驱动电路。

该设计非常适合需要对多传感器测量进行低延迟、多通道数据采集的应用,这些测量包括环境参数(温度、压力等)、生物电位和功率测量。

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封装 引脚 CAD 符号、封装和 3D 模型
SOIC (D) 8 Ultra Librarian
SOT-23 (DBV) 5 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian

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