AEDR-850x
3 Channel Re ective Incremental Encoders
Data Sheet
Description
The AEDR-850X encoder is the smallest 3 channels optical
encoder with digital outputs in the market employing
re ective technology for motion control purposes. The
encoder is designed to operate over –20°C to 85°C tem-
perature range and hence suitable for both commercial
and even industrial end applications.
The encoder houses an LED light source and a photo-
detecting circuitry in a single package. The small size of
3.95 mm (L) × 3.4 mm (W) × 0.9562 mm (H), allows it to be
even used in a wide range of miniature commercial appli-
cation where size and space is a primary concern.
The AEDR-850X encoder o ers two-channel quadrature
digital outputs and a third channel, index digital outputs.
Being TTL compatible, the outputs of the AEDR-850X
encoder can be interfaced directly with most of the signal
processing circuitries. Hence the encoder provides great
design in exibility and easy integration into existing
systems.
Features
World smallest 3 channels re ective technology
encoder.
Surface mount leadless package 3.95 mm (L) × 3.4 mm
(W) × 0.9562 mm (H)
3 channels; two channel quadrature digital outputs
for direction sensing and a third channel, Index digital
output.
Build in interpolator, factor of 1×, 2×, and 4× selectable
via external pinouts
TTL compatible
Single 5 V supply
–20°C to 85°C absolute operating temperature
Encoding resolution: 294 to 304 (lines/inch)
Applications
Ideal for high volume applications:
Close loop stepper motors
Miniature motors
Printers
Copiers
Card readers
Scanners
Projectors
Consumer and industrial product applications
Note: Drawing not to scale.
Codewheel
Reective Encoder
V
CC
V
CC
Ch A
Ch B
Ch I
SEL 4X
SEL 2X
Gnd
Gnd
Signal
Processing
Circuitry
R
Note: Avago Technologies encoders are not recommended for use in safety critical applications, e.g., ABS braking
systems, power steering, life support systems and critical care medical equipment. Avago’s products and software are
not speci cally designed, manufactured or authorized for sale as parts, components or assemblies for the planning, con-
struction, maintenance or direct operation of a nuclear facility or for use in medical devices or applications. Customers
are solely responsible, and waive all rights to make claims against Avago or its suppliers, for all losses, damage, expense
or liability in connection with such use. Please contact your local sales representative if more clari cation is needed.
