Nuestros componentes destacados son dos comparadores de Texas Instruments para alta velocidad de hasta 325 MHz. El artículo se basa en la hoja de datos actualizada de noviembre de 2021. Se proporcionan enlaces a la hoja de datos e información sobre cómo obtener el componente de Mouser Electronics.

Enlace a la hoja de datos: https://www.ti.com/lit/ds/symlink/tlv3601.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1638210615570&ref_url=https%253A%252F%252Fbr.mouser.com%252F. Enlace a la página de compra de Mouser Electronics: https://br.mouser.com/new/texas-instruments/ti-tlv3601-comparator/

 

Descripción

TLV3601 y TLV3603 son comparadores de alta velocidad de hasta 325 MHz con entradas de carril a carril y un retardo de propagación de 2,5 ns. La combinación de respuesta rápida y amplio rango de tensión operativo hace que estos comparadores sean adecuados para la detección de pulsos de señal estrecha y datos en aplicaciones de recuperación de reloj en LIDAR, localizadores y receptores de línea. Las salidas push-pull (de un solo extremo) de TLV3601 y TLV3603 simplifican y ahorran el cableado integrado para el cableado de la placa a las interfaces de E / S, lo que reduce el consumo de energía en comparación con los comparadores de salida diferencial de alta velocidad equivalentes.

Pueden conectarse directamente a la mayoría de los controladores digitales y expansores de E / S existentes en el circuito descendente. El TLV3601 está disponible en una pequeña carcasa SC70 de 5 pinos que lo hace adecuado para un espacio limitado en el equipo. TLV3603 está empaquetado en un SC70 de 6 pines que mantiene la misma velocidad y tamaño que TLV3601, ofreciendo características adicionales de control de histéresis ajustable y capacidad de cierre de salida.

En la figura 1 tenemos el circuito de aplicación típico.

 

Figura 1 - Circuito de aplicación
Figura 1 - Circuito de aplicación

 

 

En la figura 2 mostramos las diferencias entre los dos tipos.

 

Figura 2 - Diferencias entre tipos
Figura 2 - Diferencias entre tipos

 

 

Los recintos se muestran en la figura 3.

 

 

Figura 3 - Recintos
Figura 3 - Recintos

 

 

En la ficha técnica tenemos el detalle de las funciones de los pines, así como tablas indicando las condiciones de funcionamiento recomendadas y los máximos absolutos. También se pueden encontrar las curvas de rendimiento necesarias para el proyecto.

Tras la descripción del funcionamiento encontramos circuitos prácticos. Algunos de ellos fueron seleccionados para presentar en este artículo. Así, en la figura 4 tenemos la forma de obtener una histéresis ajustable usando un resistor de 150k.

 

Figura 4 - Histéresis ajustable
Figura 4 - Histéresis ajustable

 

 

La figura 5 muestra un receptor óptico que utiliza un fotodiodo como sensor.

 

Figura 5 - receptor óptico
Figura 5 - receptor óptico

 

El circuito de la Figura 6 es un disparador externo para osciloscopios.

 

Figura 6 - Disparador externo para osciloscopio
Figura 6 - Disparador externo para osciloscopio

 

Se puede obtener otra información importante para proyectos en la hoja de datos.

 

 

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