INA128

ACTIVO

Amplificador de instrumentación de precisión, CMRR de 130 dB, 700 µA y baja potencia

Detalles del producto

Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4.5 Input offset (±) (max) (µV) 50 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 8 Features Current Feedback, Overvoltage protection CMRR (min) (dB) 120 Input offset drift (±) (max) (µV/°C) 0.5 Input bias current (±) (max) (nA) 5 Iq (typ) (mA) 0.7 Bandwidth at min gain (typ) (MHz) 1.3 Gain error (±) (max) (%) 0.5 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.004 Output swing headroom (to negative supply) (typ) (V) 0.8 Output swing headroom (to positive supply) (typ) (V) -0.9 Input common mode headroom (to negative supply) (typ) (V) 1.7 Input common mode headroom (to positive supply) (typ) (V) -1.4 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.2
Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4.5 Input offset (±) (max) (µV) 50 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 8 Features Current Feedback, Overvoltage protection CMRR (min) (dB) 120 Input offset drift (±) (max) (µV/°C) 0.5 Input bias current (±) (max) (nA) 5 Iq (typ) (mA) 0.7 Bandwidth at min gain (typ) (MHz) 1.3 Gain error (±) (max) (%) 0.5 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.004 Output swing headroom (to negative supply) (typ) (V) 0.8 Output swing headroom (to positive supply) (typ) (V) -0.9 Input common mode headroom (to negative supply) (typ) (V) 1.7 Input common mode headroom (to positive supply) (typ) (V) -1.4 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.2
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6
  • Low offset voltage: 50µV, maximum
  • Low drift: 0.5µV/°C, maximum
  • Low input bias current:
    • 5nA, maximum (CSO: SHE)
    • 0.7nA, maximum (CSO: FRE)
  • Low noise: 8nV/√Hz, 0.2µVpp
  • High CMR: 120dB, minimum
  • Bandwidth: 1.3MHz (G = 1)
  • Inputs protected to ±40V
  • Wide supply range: ±2.25V to ±18V
  • Low quiescent current: 700µA
  • Packages: 8-pin plastic DIP, SO-8
  • Low offset voltage: 50µV, maximum
  • Low drift: 0.5µV/°C, maximum
  • Low input bias current:
    • 5nA, maximum (CSO: SHE)
    • 0.7nA, maximum (CSO: FRE)
  • Low noise: 8nV/√Hz, 0.2µVpp
  • High CMR: 120dB, minimum
  • Bandwidth: 1.3MHz (G = 1)
  • Inputs protected to ±40V
  • Wide supply range: ±2.25V to ±18V
  • Low quiescent current: 700µA
  • Packages: 8-pin plastic DIP, SO-8

The INA128 and INA129 (INA12x) are low-power, general-purpose instrumentation amplifiers that offer excellent accuracy. The versatile three op amp design and small size make these amplifiers an excellent choice for a wide range of applications. Current-feedback input circuitry provides wide bandwidth even at high gain (200kHz at G = 100).

A single external resistor sets any gain from 1 to 10,000. The INA128 provides an industry-standard gain equation with a 50kΩ resistor. The INA129 gain equation uses a 49.4kΩ resistor to allow for drop-in replacements of comparable devices.

The INA12x are available in plastic DIP and surface-mount packages, specified for the –40°C to +85°C temperature range. The INA128 is also available in a dual configuration, the INA2128.

The upgraded INA828 offers a lower input bias current (0.6nA, maximum) and lower noise (7nV/√Hz) at the same quiescent current. See the Device Comparison Table for a selection of precision instrumentation amplifiers from Texas Instruments.

The INA128 and INA129 (INA12x) are low-power, general-purpose instrumentation amplifiers that offer excellent accuracy. The versatile three op amp design and small size make these amplifiers an excellent choice for a wide range of applications. Current-feedback input circuitry provides wide bandwidth even at high gain (200kHz at G = 100).

A single external resistor sets any gain from 1 to 10,000. The INA128 provides an industry-standard gain equation with a 50kΩ resistor. The INA129 gain equation uses a 49.4kΩ resistor to allow for drop-in replacements of comparable devices.

The INA12x are available in plastic DIP and surface-mount packages, specified for the –40°C to +85°C temperature range. The INA128 is also available in a dual configuration, the INA2128.

The upgraded INA828 offers a lower input bias current (0.6nA, maximum) and lower noise (7nV/√Hz) at the same quiescent current. See the Device Comparison Table for a selection of precision instrumentation amplifiers from Texas Instruments.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet INA12x Precision, Low-Power Instrumentation Amplifiers datasheet (Rev. G) PDF | HTML 16 ene 2026
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML 27 jul 2021
Application brief Comprehensive Error Calculation for Instrumentation Amplifiers 26 mar 2019
Application note A Numerical Protection Relay Solution (Rev. A) 26 jul 2018
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 mar 2017
User guide Instrumentation Amplifier With DC Rejection Design Guide 14 may 2015
Analog Design Journal Getting the most out of your instrumentation amplifier design 10 oct 2005

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

INAEVM — Módulo de evaluación de amplificador de instrumentación universal

The universal INAEVM (Instrumentation Amplifier Evaluation Module) is available in two package options that simplify prototyping precision instrumentation amplifiers in either the SO-8 (D) package or the MSOP-8(DGK) package with the pinout shown.  See the chart in the user guide (...)

Guía del usuario: PDF | HTML
Modelo de simulación

INA128 TINA TI Reference Design

SBOM762.TSC (88 KB) - TINA-TI Reference Design
Modelo de simulación

INA128 TINA TI Spice Model

SBOM763.ZIP (5 KB) - TINA-TI Spice Model
Modelo de simulación

INA128x and INA129x PSpice Model (Rev. A)

SBOM764A.ZIP (25 KB) - PSpice Model
Herramienta de cálculo

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 (...)

Productos y hardware compatibles

Productos y hardware compatibles

Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® para TI es un entorno de diseño y simulación que ayuda a evaluar la funcionalidad de los circuitos analógicos. Esta completa suite de diseño y simulación utiliza un motor de análisis analógico de Cadence®. Disponible sin ningún costo, PSpice para TI incluye una de las bibliotecas de modelos (...)
Herramienta de simulación

TINA-TI — Programa de simulación analógica basado en SPICE

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 (...)
Guía del usuario: PDF
Diseños de referencia

TIPD191 — Diseño de referencia de amplificador de instrumentación con rechazo de CC

This design is an ac coupled instrumentation amplifier. More specifically, the circuit amplifies ac differential input signals and rejects dc differential and common mode signals. The input is dc coupled, so it achieves effective ac coupling by shifting the instrumentation amplifier reference (...)
Guía del usuario: PDF
Esquema: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
PDIP (P) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL)/reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

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

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

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