View HEDS-9730-350_736968.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Agilent HEDS-9730, HEDS-9731 Small Optical Encoder Modules 480lpi Digital Output
Data Sheet
Features * Small Size Description The HEDS- 973X is a high performance incremental encoder module. When operated in conjunction with either a codewheel or codestrip, this module detects rotary or linear position. The encoder consists of a lensed LED source and a detector IC enclosed in a small C- shaped plastic package. Due to a highly collimated light source and a unique photodetector array, the module is extremely tolerant to mounting misalignment. Block Diagram
RESISTOR LENS PHOTODIODES COMP ARATORS A + LED A B + VCC 3
* High Resolution The two channel digital outputs and 3.3V supply input are accessed through four solder plated leads located on 2.54mm (0.1inch) centers. The standard HEDS- 973X is designed for use with an appropriate optical radius codewheel or linear codestrip. Other options are available. Please contact the factory for more information. * Two Channel Quadrature Output * Linear and Rotary Applications * No Signal Adjustment required * TTL or 3.3V/5V CMOS Compatible * Wave Solderable * Lead-free Package * -40oC to 85oC Operating Temperature * Single 3.3V Supply Applications The HEDS- 973X provides sophisticated motion detection, making closed loop control very cost competitive. Typical applications include printers, plotters, copiers and office automation equipment.
Note:
CHANNEL A 2 CHANNEL B 4
B SIGNAL PROCESSING CIRCUITRY
GND 1 EMITTER SECTION
Figure 1
Agilent Technologies' encoders are not recommended for use in safety critical applications, e.g., ABS braking systems and critical-care medical equipment. Please contact a sales representative if more clarification is needed.
CODE WHEEL
DETECTOR SECTION
ESD WARNING: NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC DISCHARGE.
Theory of Operation A HEDS- 973X is a C- shaped emitter/detector module. Coupled with a codewheel, it translates rotary motion into a two- channel digital output; coupled with a codestrip, it translates linear motion into digital outputs. As seen in Figure 1, the module contains a single Light Emitting Diode (LED) as its light source. The light is collimated into parallel beam by means of a single lens located directly over the LED. Opposite the emitter is the integrated detector circuit. This IC consists of photodetectors and a signal processing circuitry necessary to produce the digital waveforms. The codewheel/codestrip moves between the emitter and detector, causing the light beam to be interrupted by the pattern of spaces and bars on the codewheel/ codestrip. The photodiodes, which detect these interruptions, are arranged in a pattern that corresponds to the radius and count density of the codewheel/ codestrip. These photodiodes are also spaced such that a light period on one pair of detectors corresponds to a dark period on the adjacent pairs of detectors. The photodiode outputs are fed through the signal processing circuitry. Two comparators receive these signal and produce the final outputs for Channels A and B. Due to this integrated phasing technique the output of channel A is in quadrature with Channel B (90 degrees out of phase).
Definitions
Note: Refer to Figure 2
Count (N): The number of bar and window pairs or counts per revolution (CPR) of the codewheel. Or the number of lines per inch of the codestrip (LPI) 1 shaft Rotation = 360 degrees = N cycles 1 cycle (c) = 360 electrical degree, equivalent to 1 bar and window pair. Pulse Width (P): The number of electrical degrees that an output is high during one cycle, nominally 180e or 1/2 a cycle. Pulse Width Error (P): The deviation in electrical degrees of the pulse width from its ideal value of 180e. State Width (S): The number of electrical degrees between a transition in the output of channel A and the neighboring transition in the output of channel B. There are 4 states per cycle, each nominally 90e. State Width Error (S): The deviation in electrical degrees of each state width from its ideal value of 90e.
Phase (): The number of electrical degrees between the center of the high state on channel A and the center of the high state on channel B. This value is nominally 90e for quadrature output. Phase Error (): The deviation in electrical degrees of the phase from its ideal value of 90e. Direction of Rotation: When the codewheel rotates in the counter- clockwise direction (as viewed from the encoder end of the motor), channel A will lead channel B. If the codewheel rotates in the clockwise direction, channel B will lead channel A. Optical Radius (Rop): The distance from the codewheel's center of rotation to the optical center (O.C) of the encoder module. Angular Misalignment Error (EA): Angular misalignment of the sensor in relation to then tangential direction. This applies for both rotary and linear motion. Mounting Position (RM): Distance from Motor Shaft center of rotation to center of Alignment Tab receiving hole.
Output Waveforms
Figure 2.
2
Absolute Maximum Ratings Parameter Storage Temperature Operating Temperature Supply Voltage Output Voltage Output Current per Channel Soldering Temperature Symbol TS TA VCC VO IOUT TSOL Min. -40 -40 -0.5 -0.5 -1.5 20 Max. 85 85 7 VCC 19 260 Units C C Volts Volts mA C t 5 sec Notes
Recommended Operating Conditions Parameter Temperature Supply Voltage Load Capacitance Pull-up Resistor Frequency Angular Misalignment Mounting Position Symbol TA VCC CL RL f EA RM -2.0 0.0 ROP-0.14 (ROP -0.006) none 40 +2.0 kHz Deg. mm (inch) Min. -40 2.8 3.3 or 5 Typ. Max. 85 5.2 100 Units C Volts pF Recommend no pullup. Device has integrated 2.5 k on outputs Velocity (rpm) x N/60 Refer to Mounting Consideration Refer to Mounting Consideration Ripple < 100mVp-p Notes
Electrical Characteristics Electrical Characteristics Over the Recommended Operating Conditions. Typical Values at 25C. Parameter Supply Current Symbol ICC Min. 12 Typ. 25 55 High Level Output Voltage VOH 2.4 Max. 40 85 Volts Units mA Notes Typ. 3.3V Typ. 5V When VOH = 2.4V (Min)Typ. IOH = -0.4 mA @ 3.3VTyp. IOH = -1.0 mA @ 5V When VOL = 0.4V (Max)Typ. IOL = 12 mA @ 3.3VTyp. IOL = 14 mA @ 5V CL=25 pF
Low Level Output Voltage
VOL
0.4
Volts
Rise Time Fall Time Encoding Characteristics
tr tf
200 50
ns ns
Encoding Characteristics Over the Recommended Operating Conditions and Mounting Conditions These characteristics do not include codewheel/codestrip contribution. The typical values are average over the full rotation of the codewheel Parameter Pulse Width Error State Width Error Phase Error Symbol P S Typical 5 3 2 Maximum Units 50 50 15 e e e
3
Notes
Mounting Considerations
5.32 MAX. (0.209)
4.40 0.13 0.17 0.005 SEE NOTE 1 Rm Rop IMAGE SIDE OF CODEWHEEL/CODESTRIP 6.30 MAX. (0.248) 6.50 MIN. (0.256) C OF ALIGNMENT TAB L
CENTER OF ROTATION MOTOR SHAFT CENTER -A-
2.03 MIN. (0.080) 1.0 DEEP MIN. (0.039)
EA
2X R ALIGNMENT TAB RECEIVING HOLE Rm = Rop - 0.14 (0.006) 2.03 HOLE MIN. (0.080) 1.0 DEEP MIN. (0.039)
A 0.13 mm (0.005")
DIMENSIONS IN MILLIMETERS (INCHES).
Note: These dimensions include shaft end play and codewheel warp. For both rotary and linear motion, angular misalignment, EA must be 1 degrees to achieve Encoding Characteristics. All dimension for mounting the module and codewheel/codestrip should be measured with respect to two mounting posts, as shown above
Recommended Codewheel and Codestrip Characteristics
MAX 3.4 (0.134)
Wb Lw
Ww
Rc Rop W1 W2 Ww Wb L
Parameter Window/bar Ratio Window Length (Rotary) Absolute Maximum Codewheel Radius (Rotary) Center of Post to Inside Edge of Window Center of Post to Outside Edge of Window Center of Post to Inside Edge of Codestrip
Symbol Ww/Wb LW Rc W1 W2 L
Min. 0.9 1.80 (0.071)
Max. 1.1 2.31 (0.091) Rop + 3.40 (Rop + 0.134)
Unit
Notes
mm (inch) mm (inch) mm (inch) mm (inch) Includes eccentricity errors
1.04 (0.041) 0.76 (0.036) 3.60 (0.142)
mm (inch)
4
Ordering Information
HEDS - 973
Option Resolution 3 - 480 LPI Bracket Option 50
Lead Configurations 0 - Straight leads 1 - Bent leads
Package Dimension Option 50
LEAD THICKNESS = 0.25 mm LEAD PITCH = 2.54 mm 3.8
10.8 0.5
CH A CH B
R 1.4 5.5 0.3 1.4 6.4 3.9 0.8 2x 2.00 0.02 4.2 7.5 10.1 3.90 0.10 5.0 4.2 R 2.6
3.0 OPTION CODE
GND
V CC
0.5
PIN 1 ID
8.7
AGILENT
X XXXXX
50
7.0 12.6 0.5
0.14 (OPTICAL CENTER)
1.70 0.15
8.4 PART # (REFER -05) 15.0
C
YYWW
DATE CODE C = COUNTRY OF ORIGIN MARKING (REFER -05 FOR DETAILS)
1.8
20.2 0.5
9.8
Bent Version - Option 50
LEAD THICKNESS = 0.25 mm LEAD PITCH = 2.54 mm R 2.6 R 1.4 6.0 3.0 0.3
CH A CH B GND V CC
5 TYP.
OPTION CODE
PIN 1 ID
8.7
1.4 6.4 3.9 5.0
9.2 0.3 4.2
AGILENT
X XXXXX
50
7.0 12.6 0.5
0.14 (OPTICAL CENTER) 2x 2.00 0.02 4.2 7.5 10.1
0.8 1.70 0.15 3.90 0.10 1.8 PART # (REFER -05)
8.4 15.0
C
YYWW
DATE CODE C = COUNTRY OF ORIGIN MARKING (REFER -05 FOR DETAILS)
20.2 0.5
9.8 3.8 0.5
10.8 0.5
5
Wave Soldering Profile
7 sec MAX. 260 C Y-AXIS
FLOW 120 C/20 sec MAX. X-AXIS COOL DOWN
Parameter A B C D E Solder Pot Temperature Preheat Zone Temperature Dip in Time Solder Pot Zone (PCB Top)
Min. NA 85 5 NA
Max. 260 120 7 NA NA
Nominal values 250 - 260 100 - 120 5 NA 200
Units C C sec C C
Solder Pot Zone (Encoder Lead) 200
www.agilent.com/ semiconductors
For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (800) 235-0312 or (916) 788-6763 Europe: +49 (0) 6441 92460 China: 10800 650 0017 Hong Kong: (+65) 6756 2394 India, Australia, New Zealand: (+65) 6755 1939 Japan: (+81 3) 3335-8152 (Domestic/International) or 0120-61-1280 (Domestic Only) Korea: (+65) 6755 1989 Singapore, Malaysia, Vietnam, Thailand, Philippines, Indonesia: (+65) 6755 2044 Taiwan: (+65) 6755 1843 Data subject to change. Copyright2004 Agilent Technologies, Inc. March 17, 2004 5989-0837EN

▲Up To Search▲

Price & Availability of HEDS-9730-350

	To Download HEDS-9730-350 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .