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Broadcom AEDR 8502 100 reflective optical encoder with compact surface mount leadless package design

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Broadcom AEDR 8502 100 reflective optical encoder with compact surface mount leadless package design

Sensing Distance : 1mm

Description : 1mm SMD-8P Reflective - Logic Output RoHS

Mfr. Part # : AEDR-8502-100

Model Number : AEDR-8502-100

Package : SMD-8P

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Product Overview

The AEDR-850X is the smallest 3-channel optical encoder utilizing reflective technology for motion control. Designed for operation between -20C and 85C, it is suitable for commercial and industrial applications. Its compact size (3.95 mm x 3.4 mm x 0.9562 mm) makes it ideal for miniature devices where space is critical. The encoder offers two-channel quadrature digital outputs and a 3rd channel index digital output, with TTL compatibility for easy integration into signal processing circuitry. It features a built-in interpolator with selectable factors (1x, 2x, 4x) and operates on a single 5V supply.

Product Attributes

Brand: Avago Technologies
Technology: Reflective Optical Encoder
Package: Surface mount leadless
Moisture Sensitivity Level (MSL): 3

Technical Specifications

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Absolute Maximum Ratings
Storage Temperature	TS	-20		85	C
Operating Temperature	TA	-20		85	C
Supply Voltage	VCC			7	V
Output Voltage	VO			VCC	V
Recommended Operating Conditions
Temperature	TA	-20	25	85	C
Supply Voltage	VCC	4.5	5	5.5	V	Ripple < 100mVp-p
LED Current	ILED		15		mA	Recommended series resistor = 180 (1%)
Count Frequency	F			55	kHz	1 x Interpolation Factor
Radial Misalignment	ER		0.2		mm
Tangential Misalignment	ET		0.2		mm
Codewheel Gap	G	0.5	1.0	1.25	mm	See note 3
Encoding Characteristics (Codewheel of Rop @11.38 mm)
Parameter	Symbol	1 X	2 X	4 X	Unit	Notes
Cycle Error	C	18	22	36	e	Typical values represent encoder performance at typical mounting alignment.
Pulse Width Error	P	15	20	30	e	Maximum values represent encoder performance across recommended mounting tolerance.
Phase Error		9	15	18	e
State Error	S	10	15	25	e
Index Pulse Width (Gated 90)	PO	90	90	90	e
Index Pulse Width (Gated 180)	PO	180	180	180	e
Index Pulse Width (Gated 360)	PO	Not Available	360	360	e
Electrical Characteristics
Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
High Level Output Voltage	VOH	2.4			V	IOH = -1.5 mA
Low Level Output Voltage	VOL			0.4	V	IOH = +1.5 mA
Output current per channel	IO			1.5	mA
Rise Time	tr			<100	ns	CL = 25pF, RL = 2.7k
Fall Time	tf			<100	ns
Codewheel Characteristics
Parameter	Symbol	Min.	Max.	Unit	Notes
Window/bar Ratio	Ww/Wb	0.9	1.1
Window/bar Length	LW	1.80		mm (inches)
Specular Reflectance	Rf	60		%	Reflective area.
Non-reflective area			10	%
Line Density	LPmm	11.575	11.969	lines/mm
Line Density	LPI	294	304	lines/inch	Recommended LPI is 294

2410301827_Broadcom-AEDR-8502-100_C17342243.pdf

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