To display text input field you can use the following code sample,

Code sample

array(
    'id'		    => 'some_id_text_field',
    'title'		    => __('Text Field','text-domain'),
    'details'	    => __('Description of text field','text-domain'),
    'type'		    => 'text',
    'default'      => 'Default Text',
    'placeholder'   => __('Text value','text-domain'),
),

Preview

WP Option Framework