HOA0901

HOA0901 Transmissive Encoder Sensor m o .c U 4 t e e h S a t a .D w w w Direct TTL interface Inverting logic output Resolution to 0.009 in.(.229 mm) Internal temperature compensation 0.126 in.(3.2 mm) slot width Two mounting configurations DESCRIPTION The HOA0901 sensor consists of a dual channel IC detector and an IRED encased in a black thermoplastic housing. The device is typically used with an interrupter strip or disk (code wheel) to encode the rate and direction of mechanical motion. Applications include linear and rotary encoders; it is especially suited for the encoding function in an optical mouse. As the interruptive pattern moves, the detector generates two output signals which can be processed to provide speed and direction information. The detector is a monolithic IC which consists of two narrow adjacent photodiodes, amplifiers, and Schmitt trigger output stages. The outputs are NPN collectors with internal 10 kì (nominal) pull-up resistors to VÙÙ which are capable of directly driving TTL loads. The IC design incorporates circuitry to compensate the sensitivity for the output power vs. temperature characteristic of the IRED. The sensing areas of the IC are each 0.008 in.(.203 mm) in width and .015 in.(.381mm) in height with a 0.001 in.(.0254 mm) separation for a center- to- center spacing of 0.009 in.(.229 mm) and outside edge to edge distance of 0.017 in.(.432 mm). The device is designed to operate with an encoder period as small as 0.036 in.(.914 m...