Get Excerpt from an Advanced Custom Field ACF

Blade Version

function custom_field_excerpt($text, $words) {
    global $post;
    //$text = get_field('your_field_name'); //Replace 'your_field_name'
    if ( '' != $text ) {
        $text = strip_shortcodes( $text );
        $text = apply_filters('the_content', $text);
        $text = str_replace(']]>', ']]>', $text);
        $excerpt_length = $words; // 20 words
        $excerpt_more = apply_filters('excerpt_more', ' foobar' . '[...]');
        $text = wp_trim_words( $text, $excerpt_length, $excerpt_more );
    }
    return apply_filters('the_excerpt', $text);
}

{!! App\custom_field_excerpt($historia['texto_historia'], 30); !!}

PHP Version

function custom_field_excerpt() {
	global $post;
	$text = get_field('your_field_name'); //Replace 'your_field_name'
	if ( '' != $text ) {
		$text = strip_shortcodes( $text );
		$text = apply_filters('the_content', $text);
		$text = str_replace(']]>', ']]>', $text);
		$excerpt_length = 20; // 20 words
		$excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
		$text = wp_trim_words( $text, $excerpt_length, $excerpt_more );
	}
	return apply_filters('the_excerpt', $text);
}

echo custom_field_excerpt();

Taken from: http://wpmunchies.com/get-excerpt-advanced-custom-field-acf/