HLC2705-001

HLC2705-001 Datasheet

HLC2705

Part	Datasheet
HLC2705-001	HLC2705-001 (pdf)

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HLC2705 Encoder Detector FEATURES • Side-looking plastic package • TTL/LSTTL/CMOS compatible • On-chip quadrature logic which provides tach and direction outputs • Linear or rotary encoder applications • Resolution to in. .457 • Sensitivity versus temperature compensation • Mechanically and spectrally matched to SEP8506 and SEP8706 infrared emitting diodes DESCRIPTION The HLC2705 detector is designed to sense speed and direction of mechanical motion. Applications include rotary and linear encoders the device is especially well suited for the encoding function in an optical mouse. The detector is a monolithic IC, consisting of two narrow adjacent photodiodes, amplifier stages, and quadrature logic which provides two outputs. One is a fixed duration, low level active tachometer counting pulse. It is generated whenever the "A" channel illumination passes through the threshold level. The second is a direction output which is set to a logic high or a logic low depending upon which channel is illuminated first. The sensor also has sensitivity compensation circuitry for the output power versus temperature characteristic of an IRED. The IC is encapsulated in a molded, unlensed black plastic package which is transmissive to IR energy, yet provides shielding from visible light. The tachometer output is an NPN collector, internally connected to VÙÙ through a 10 nominal resistor. The direction output is a totem-pole configuration. Both are capable of directly driving TTL loads. The tachometer pulse is generated at both the increasing and decreasing illumination thresholds of the "A" channel, resulting in two tachometer pulses for each mechanical period of the interrupter. The HLC2705 is designed to work with a mechanical period as small as in. 0.914 mm , providing resolution to in. 0.457 mm . INFRA-74.TIF OUTLINE DIMENSIONS in inches mm Tolerance 3 plc decimals 2 plc decimals DIM_031.cdr Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HLC2705 Encoder Detector ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL MIN TYP MAX UNITS TEST CONDITIONS ABSOLUTE MAXIMUM RATINGS Free-Air Temperature unless otherwise noted Duration of Output Short to VÙÙ or Ground sec. Operating Temperature Range Storage Temperature Range Soldering Temperature 5 sec Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HLC2705 Encoder Detector FUNCTIONAL BLOCK DIAGRAM SCH_046.cdr OUTPUT TIMING DIAGRAM cir_012.cdr Relative response - % Relative irradiance Fig. 1 Responsivity vs Angular Displacement 100% gra_066.ds4 50% -100 -80 -60 -40 -20 0 20 40 60 80 100 Angular displacement - degrees All Performance Curves Show Typical Values Fig. 2 Threshold Irradiance vs Temperature

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HLC2705

Encoder Detector

FEATURES
• Side-looking plastic package
• TTL/LSTTL/CMOS compatible
• On-chip quadrature logic which provides tach
and direction outputs
• Linear or rotary encoder applications
• Resolution to in. .457
• Sensitivity versus temperature compensation
• Mechanically and spectrally matched to

SEP8506 and SEP8706 infrared emitting diodes

DESCRIPTION The HLC2705 detector is designed to sense speed and direction of mechanical motion. Applications include rotary and linear encoders the device is especially well suited for the encoding function in an optical mouse. The detector is a monolithic IC, consisting of two narrow adjacent photodiodes, amplifier stages, and quadrature logic which provides two outputs. One is a fixed duration, low level active tachometer counting pulse. It is generated whenever the "A" channel illumination passes through the threshold level. The second is a direction output which is set to a logic high or a logic low depending upon which channel is illuminated first. The sensor also has sensitivity compensation circuitry for the output power versus temperature characteristic of an IRED. The IC is encapsulated in a molded, unlensed black plastic package which is transmissive to IR energy, yet provides shielding from visible light.

The tachometer output is an NPN collector, internally connected to VÙÙ through a 10 nominal resistor. The direction output is a totem-pole configuration. Both are capable of directly driving TTL loads.

The tachometer pulse is generated at both the increasing and decreasing illumination thresholds of the "A" channel, resulting in two tachometer pulses for each mechanical period of the interrupter. The HLC2705 is designed to work with a mechanical period as small as in. 0.914 mm , providing resolution to in. 0.457 mm .

INFRA-74.TIF

OUTLINE DIMENSIONS in inches mm Tolerance 3 plc decimals
2 plc decimals

DIM_031.cdr

Honeywell reserves the right to make changes in order to improve design and supply the best products possible.

HLC2705

Encoder Detector

ELECTRICAL CHARACTERISTICS PARAMETER

SYMBOL MIN TYP MAX UNITS

TEST CONDITIONS

ABSOLUTE MAXIMUM RATINGS

Free-Air Temperature unless otherwise noted

Duration of Output

Short to VÙÙ or Ground
sec.

Operating Temperature Range

Storage Temperature Range

Soldering Temperature 5 sec

Honeywell reserves the right to make changes in order to improve design and supply the best products possible.

HLC2705

Encoder Detector

FUNCTIONAL BLOCK DIAGRAM

SCH_046.cdr

OUTPUT TIMING DIAGRAM
cir_012.cdr

Relative response - % Relative irradiance

Fig. 1 Responsivity vs Angular Displacement
100%
gra_066.ds4
50% -100 -80 -60 -40 -20 0 20 40 60 80 100

Angular displacement - degrees

All Performance Curves Show Typical Values

Fig. 2 Threshold Irradiance vs Temperature

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Datasheet ID: HLC2705-001 636480