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Amplificadores operacionales (op amps)
Amplificadores operacionales de precisión (Vos <1 mV)

OPA2381

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Amplificador de transimpedancia de precisión y baja potencia

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Hoja de datos

OPA2381

ACTIVO
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Detalles del producto

Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Vos (offset voltage at 25°C) (max) (mV) 0.025 Offset drift (typ) (µV/°C) 0.03 Input bias current (max) (pA) 50 GBW (typ) (MHz) 18 Features Small Size Slew rate (typ) (V/µs) 12 Rail-to-rail In to V-, Out Iq per channel (typ) (mA) 0.8 Vn at 1 kHz (typ) (nV√Hz) 114 CMRR (typ) (dB) 110 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.01 Architecture FET Input common mode headroom (to negative supply) (typ) (V) 0 Input common mode headroom (to positive supply) (typ) (V) -1.8 Output swing headroom (to negative supply) (typ) (V) 0.03 Output swing headroom (to positive supply) (typ) (V) -0.4
Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Vos (offset voltage at 25°C) (max) (mV) 0.025 Offset drift (typ) (µV/°C) 0.03 Input bias current (max) (pA) 50 GBW (typ) (MHz) 18 Features Small Size Slew rate (typ) (V/µs) 12 Rail-to-rail In to V-, Out Iq per channel (typ) (mA) 0.8 Vn at 1 kHz (typ) (nV√Hz) 114 CMRR (typ) (dB) 110 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.01 Architecture FET Input common mode headroom (to negative supply) (typ) (V) 0 Input common mode headroom (to positive supply) (typ) (V) -1.8 Output swing headroom (to negative supply) (typ) (V) 0.03 Output swing headroom (to positive supply) (typ) (V) -0.4
VSON (DRB) 8 9 mm² (3 mm × 3 mm) VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • OVER 250kHz TRANSIMPEDANCE BANDWIDTH
  • DYNAMIC RANGE: 5 Decades
  • EXCELLENT LONG-TERM STABILITY
  • LOW VOLTAGE NOISE: 10nV/Hz
  • BIAS CURRENT: 3pA
  • OFFSET VOLTAGE: 25µV (max)
  • OFFSET DRIFT: 0.1µV/°C (max)
  • GAIN BANDWIDTH: 18MHz
  • QUIESCENT CURRENT: 800µA
  • FAST OVERLOAD RECOVERY
  • SUPPLY RANGE: 2.7V to 5.5V
  • SINGLE AND DUAL VERSIONS
  • MicroPACKAGE: DFN-8, MSOP-8
  • APPLICATIONS
    • PRECISION I/V CONVERSION
    • PHOTODIODE MONITORING
    • OPTICAL AMPLIFIERS
    • CAT-SCANNER FRONT-END
    • PHOTO LAB EQUIPMENT

All trademarks are the property of their respective owners.
  • OVER 250kHz TRANSIMPEDANCE BANDWIDTH
  • DYNAMIC RANGE: 5 Decades
  • EXCELLENT LONG-TERM STABILITY
  • LOW VOLTAGE NOISE: 10nV/Hz
  • BIAS CURRENT: 3pA
  • OFFSET VOLTAGE: 25µV (max)
  • OFFSET DRIFT: 0.1µV/°C (max)
  • GAIN BANDWIDTH: 18MHz
  • QUIESCENT CURRENT: 800µA
  • FAST OVERLOAD RECOVERY
  • SUPPLY RANGE: 2.7V to 5.5V
  • SINGLE AND DUAL VERSIONS
  • MicroPACKAGE: DFN-8, MSOP-8
  • APPLICATIONS
    • PRECISION I/V CONVERSION
    • PHOTODIODE MONITORING
    • OPTICAL AMPLIFIERS
    • CAT-SCANNER FRONT-END
    • PHOTO LAB EQUIPMENT

All trademarks are the property of their respective owners.

The OPA381 family of transimpedance amplifiers provides 18MHz of Gain Bandwidth (GBW), with extremely high precision, excellent long-term stability, and very low 1/f noise. The OPA381 features an offset voltage of 25µV (max), offset drift of 0.1µV/°C (max), and bias current of 3pA. The OPA381 far exceeds the offset, drift, and noise performance that conventional JFET op amps provide.

The signal bandwidth of a transimpedance amplifier depends largely on the GBW of the amplifier and the parasitic capacitance of the photodiode, as well as the feedback resistor. The 18MHz GBW of the OPA381 enables a trans-impedance bandwidth of >: 250kHz in most configurations. The OPA381 is ideally suited for fast control loops for power level measurement on an optical fiber.

As a result of the high precision and low-noise characteristics of the OPA381, a dynamic range of 5 decades can be achieved. This capability allows the measurement of signal currents in the order of 10nA, and up to 1mA in a single I/V conversion stage. In contrast to logarithmic amplifiers, the OPA381 provides very wide bandwidth throughout the full dynamic range. By using an external pulldown resistor to –5V, the output voltage range can be extended to include 0V.

The OPA381 and OPA2381 are both available in MSOP-8 and DFN-8 (3mm x 3mm) packages. They are specified from –40°C to +125°C.

The OPA381 family of transimpedance amplifiers provides 18MHz of Gain Bandwidth (GBW), with extremely high precision, excellent long-term stability, and very low 1/f noise. The OPA381 features an offset voltage of 25µV (max), offset drift of 0.1µV/°C (max), and bias current of 3pA. The OPA381 far exceeds the offset, drift, and noise performance that conventional JFET op amps provide.

The signal bandwidth of a transimpedance amplifier depends largely on the GBW of the amplifier and the parasitic capacitance of the photodiode, as well as the feedback resistor. The 18MHz GBW of the OPA381 enables a trans-impedance bandwidth of >: 250kHz in most configurations. The OPA381 is ideally suited for fast control loops for power level measurement on an optical fiber.

As a result of the high precision and low-noise characteristics of the OPA381, a dynamic range of 5 decades can be achieved. This capability allows the measurement of signal currents in the order of 10nA, and up to 1mA in a single I/V conversion stage. In contrast to logarithmic amplifiers, the OPA381 provides very wide bandwidth throughout the full dynamic range. By using an external pulldown resistor to –5V, the output voltage range can be extended to include 0V.

The OPA381 and OPA2381 are both available in MSOP-8 and DFN-8 (3mm x 3mm) packages. They are specified from –40°C to +125°C.
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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 OPA381, OPA2381: Precision, Low Power, 18MHz Transimpedance Amplifier datasheet (Rev. B) 18/11/2004
Libro electrónico The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML 28/03/2017

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.

Placa de evaluación

AMP-PDK-EVM — Módulo de evaluación del kit de desarrollo del rendimiento del amplificador

El kit de desarrollo del rendimiento (PDK) del amplificador es un kit de módulo de evaluación (EVM) para probar los parámetros comunes del amplificador operacional y es compatible con la mayoría de los amplificadores operacionales y comparadores. El kit de EVM ofrece una placa principal con varias (...)

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

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OPAMP-NOISECALC — Noise Calculator

This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VSON (DRB) 8 Ultra Librarian
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Pedidos y calidad

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

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