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

LMP7721

ACTIVO

Amplificador de precisión con corriente de polarización de entrada de 3 femtoamperios

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LMP7721

ACTIVO
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Detalles del producto

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.8 Vos (offset voltage at 25°C) (max) (mV) 0.15 Offset drift (typ) (µV/°C) 1.5 Input bias current (max) (pA) 0.02 GBW (typ) (MHz) 17 Slew rate (typ) (V/µs) 10.43 Rail-to-rail In to V-, Out Iq per channel (typ) (mA) 1.3 Vn at 1 kHz (typ) (nV√Hz) 6.5 CMRR (typ) (dB) 100 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.022 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.3 Input common mode headroom (to positive supply) (typ) (V) -1 Output swing headroom (to negative supply) (typ) (V) 0.02 Output swing headroom (to positive supply) (typ) (V) -0.02 THD + N at 1 kHz (typ) (%) 0.0007
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.8 Vos (offset voltage at 25°C) (max) (mV) 0.15 Offset drift (typ) (µV/°C) 1.5 Input bias current (max) (pA) 0.02 GBW (typ) (MHz) 17 Slew rate (typ) (V/µs) 10.43 Rail-to-rail In to V-, Out Iq per channel (typ) (mA) 1.3 Vn at 1 kHz (typ) (nV√Hz) 6.5 CMRR (typ) (dB) 100 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.022 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.3 Input common mode headroom (to positive supply) (typ) (V) -1 Output swing headroom (to negative supply) (typ) (V) 0.02 Output swing headroom (to positive supply) (typ) (V) -0.02 THD + N at 1 kHz (typ) (%) 0.0007
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Unless Otherwise Noted, Typical Values at TA =
    25°C, VS = 5 V.
  • Input Bias Current (VCM = 1 V)
    • Maximum at 25°C ±20 fA
    • Maximum at 85°C ±900 fA
  • Offset Voltage ±26 µV
  • Offset Voltage Drift – 1.5 µV/°C
  • DC Open-Loop Gain 120 dB
  • DC CMRR 100 dB
  • Input Voltage Noise (at f = 1 kHz) 6.5 nV/√Hz
  • THD 0.0007%
  • Supply Current 1.3 mA
  • GBW 17 MHz
  • Slew Rate (Falling Edge) 12.76 V/µs
  • Supply Voltage 1.8 V to 5.5 V
  • Operating Temperature Range –40°C to 125°C
  • 8-Pin SOIC
  • Unless Otherwise Noted, Typical Values at TA =
    25°C, VS = 5 V.
  • Input Bias Current (VCM = 1 V)
    • Maximum at 25°C ±20 fA
    • Maximum at 85°C ±900 fA
  • Offset Voltage ±26 µV
  • Offset Voltage Drift – 1.5 µV/°C
  • DC Open-Loop Gain 120 dB
  • DC CMRR 100 dB
  • Input Voltage Noise (at f = 1 kHz) 6.5 nV/√Hz
  • THD 0.0007%
  • Supply Current 1.3 mA
  • GBW 17 MHz
  • Slew Rate (Falling Edge) 12.76 V/µs
  • Supply Voltage 1.8 V to 5.5 V
  • Operating Temperature Range –40°C to 125°C
  • 8-Pin SOIC

The LMP7721 is the industry’s lowest specified input bias current precision amplifier. The ultra-low input bias current is 3 fA, with a specified limit of ±20 fA at 25°C and ±900 fA at 85°C. This is achieved with the latest patent-pending technology of input bias current cancellation amplifier circuitry. This technology also maintains the ultra-low input bias current over the entire input common-mode voltage range of the amplifier.

Other outstanding features, such as low voltage noise (6.5 nV/√Hz), low DC-offset voltage (±150 µV maximum at 25°C) and low-offset voltage temperature coefficient (–1.5 µV/°C), improve system sensitivity and accuracy in high-precision applications. With a supply voltage range of 1.8 V to 5.5 V, the LMP7721 is the ideal choice for battery-operated, portable applications. The LMP7721 is part of the LMP precision amplifier family.

As part of Texas Instruments’ PowerWise™ products, the LMP7721 provides the remarkably wide-gain bandwidth product (GBW) of 17 MHz while consuming only 1.3 mA of current. This wide GBW along with the high open-loop gain of 120 dB enables accurate signal conditioning. With these specifications, the LMP7721 has the performance to excel in a wide variety of applications such as electrochemical cell amplifiers and sensor interface circuits.

The LMP7721 is offered in an 8-pin SOIC package with a special pinout that isolates the amplifier’s input from the power supply and output pins. With proper board layout techniques, the unique pinout of the LMP7721 will prevent PCB leakage current from reaching the input pins. Thus system error will be further reduced.

The LMP7721 is the industry’s lowest specified input bias current precision amplifier. The ultra-low input bias current is 3 fA, with a specified limit of ±20 fA at 25°C and ±900 fA at 85°C. This is achieved with the latest patent-pending technology of input bias current cancellation amplifier circuitry. This technology also maintains the ultra-low input bias current over the entire input common-mode voltage range of the amplifier.

Other outstanding features, such as low voltage noise (6.5 nV/√Hz), low DC-offset voltage (±150 µV maximum at 25°C) and low-offset voltage temperature coefficient (–1.5 µV/°C), improve system sensitivity and accuracy in high-precision applications. With a supply voltage range of 1.8 V to 5.5 V, the LMP7721 is the ideal choice for battery-operated, portable applications. The LMP7721 is part of the LMP precision amplifier family.

As part of Texas Instruments’ PowerWise™ products, the LMP7721 provides the remarkably wide-gain bandwidth product (GBW) of 17 MHz while consuming only 1.3 mA of current. This wide GBW along with the high open-loop gain of 120 dB enables accurate signal conditioning. With these specifications, the LMP7721 has the performance to excel in a wide variety of applications such as electrochemical cell amplifiers and sensor interface circuits.

The LMP7721 is offered in an 8-pin SOIC package with a special pinout that isolates the amplifier’s input from the power supply and output pins. With proper board layout techniques, the unique pinout of the LMP7721 will prevent PCB leakage current from reaching the input pins. Thus system error will be further reduced.
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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 LMP7721 3-Femtoampere Input Bias Current Precision Amplifier datasheet (Rev. E) PDF | HTML 15/12/2014
Circuit design Low-input bias-current front end SAR ADC circuit (Rev. B) PDF | HTML 24/09/2024
Circuit design Photodiode Amplifier Circuit (Rev. B) PDF | HTML 2/05/2024
Libro electrónico The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML 28/03/2017
Nota sobre la aplicación AN-1852 Designing With pH Electrodes (Rev. A) 1/05/2013
EVM User's guide AN-1796 LMP7721 Evaluation Board (Rev. C) 1/05/2013
Nota sobre la aplicación AN-1798 Designing with Electro-Chemical Sensors (Rev. C) 1/05/2013

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 (...)

Guía del usuario: PDF | HTML
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Placa de evaluación

LMP7721MAEVALMF_NOPB — Placa de evaluación multifunción LMP7721

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En inventario
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Modelo de simulación

LMP7721 PSpice Model (Rev. D)

SNOM096D.ZIP (30 KB) - Modelo PSpice
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Modelo de simulación

LMP7721 TINA-TI Reference Design (Rev. C)

SNOM305C (311 KB) - Diseño de referencia TINA-TI
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Modelo de simulación

LMP7721 TINA-TI Spice Model (Rev. C)

SNOM304C.ZIP (11 KB) - Modelo TINA-TI Spice
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Modelo de simulación

Simulation for Photodiode Amplifier TINA-TI Reference Design

SBOMCH8.ZIP (22 KB) - Diseño de referencia TINA-TI
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Herramienta de cálculo

OPAMP-NOISECALC — Noise Calculator

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

  • A noise generator tool - This is a Lab View 4-Run Time executable that generates Gaussian white noise, uniform white noise, 1/f noise, short noise, and 60Hz line noise. Temporal data, (...)
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Herramienta de diseño

CIRCUIT060018 — Circuito del amplificador de fotodiodo

Este circuito consta de un amplificador operacional configurado como un amplificador de transimpedancia para amplificar la corriente dependiente de luz de un fotodiodo.
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Herramienta de diseño

SBOC517 — Simulation for Photodiode Amplifier

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

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Soporte y capacitación

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

Ver todos los temas del foro en inglés

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