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Amplificadores operacionales (op amps)
Amplificadores operacionales de alta velocidad (GBW ≥ 50 MHz)

THS4281

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OPA863A ACTIVO Amp. e-trim™, alta precisión, baja potencia, un canal, 105 MHz, 12 V, realim. de tensión RRIO Lower Iq (0.75 mA), lower noise (5.9 nV/√Hz) and higher precision (95 uV/C)

THS4281

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Detalles del producto

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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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos THS4281 Very Low-Power, High-Speed, Rail-to-Rail Input and Output Voltage-Feedback Operational Amplifier datasheet (Rev. B) PDF | HTML 30/10/2015
Libro electrónico The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML 28/03/2017
Informe Voltage-reference impact on total harmonic distortion 1/08/2016
Artículo técnico When to use an amplifier with rail-to-rail inputs – and what to watch out for PDF | HTML 30/06/2016
Nota sobre la aplicación Low Power Input and Reference Driver Circuit for ADS8318 and ADS8319 24/06/2009
Analog Design Journal Designing for low distortion with high-speed op amps 2/03/2005
Nota sobre la aplicación Noise Analysis for High Speed Op Amps (Rev. A) 17/01/2005
Nota sobre la aplicación Voltage Feedback vs. Current Feedback Op Amps 30/11/1998

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Modelo de simulación

THS4281 PSpice Model (Rev. B)

SLOC047B.ZIP (54 KB) - Modelo PSpice
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SLOM442.TSC (67 KB) - Diseño de referencia TINA-TI
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THS4281 TINA-TI Spice Model

SLOM443.ZIP (14 KB) - Modelo TINA-TI Spice
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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOIC (D) 8 Ultra Librarian
SOT-23 (DBV) 5 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
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