View HEDS-9710-150_736962.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

HEDS-9710, HEDS-9711 Small Optical Encoder Modules 360 Ipi Analog Current Output Data Sheet
Description The HEDS-971x 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. The two channel analog outputs and 5 V supply input are accessed through four solder plated leads located on 2.54 mm (0.1 inch) centers. The standard HEDS-971x is designed for use with an appropriate optical radius codewheel or linear codestrip. Other options are available. Please contact the factory for more information.
Applications The HEDS-971x provides sophisticated motion detection, making closed loop control, very cost competitive. Typical applications include printers, plotters, copiers and office automation equipment. Block Diagram
RESISTOR LENS PHOTODIODES
Features * Small size * Two channel quadrature output * Linear and rotary applications * No signal adjustment required * TTL compatible * Wave solderable * Lead free package * 15oC to 45oC operating temperature * Single 5 V supply
VCC 3
COMPARATORS A + A- B +
CHANNEL A 2 CHANNEL B 4
LED
B- SIGNAL PROCESSING CIRCUITRY
GND 1 EMITTER SECTION CODE WHEEL DETECTOR SECTION
Theory of Operation An HEDS-971x 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 the block diagram, 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 signals 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 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 degrees, equivalent to 1 bar and window pair. Pulse Width (P): The number of electrical degrees that an output is high during one cycle, nominally 180 e or 1/2 a cycle. Pulse Width Error (DP): The deviation in electrical degrees of the pulse width from its ideal value of 180 e. 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 90 e. State Width Error (DS): The deviation in electrical degrees of each state width from its ideal value of 90 e.
Phase (f): 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 90 e for quadrature output. Phase Error (Df): The deviation in electrical degrees of the phase from its ideal value of 90 e. 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 the 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.
2
Absolute Maximum Ratings Parameter Storage Temperature Operating Temperature Supply Voltage Soldering Temperature Symbol TS TA VCC TSOL Min. -40 0 -0.5 Max. 85 85 7 260 Units C C Volts C t 5 sec Notes
Recommended Operating Conditions Parameter Temperature Supply Voltage Count Frequency Symbol TA VCC f Min. 15 4.8 5.0 Typ. Max. 45 5.2 40 Units C Volts kHz Ripple < 100 m Vp-p Velocity (rpm) x N/60 Notes
Electrical Characteristics Electrical Characteristics Over the Recommended Operating Conditions. Typical Values at 25C. Parameter Supply Current Symbol ICC Min. Typ. 17 Max. 40 Units mA Notes
Waveform Definition
ANALOG Iap Ibp
A
B Ibm Iam
DIGITAL A
B
P P S1 S2 S3 S4
3
Test Parameter Definitions Parameter Ip Ipp Iapp/Ibpp Ioffset Symbol Analog peak Analog peak to peak Analog peak to peak ratio Analog Offset Definition The absolute value in A of the magnitude of the analog signal (i.e. one sided rating). The peak to peak signal magnitude in mA of the analog signal. The ratio of A channel peak analog signal to B channel peak to peak analog signal. The offset in A from the mid-point of the analog peak to peak signal to zero current. The number of electrical degrees between a transition in channel A and the neighboring transition in channel B. There are 4 states per cycle, each nominally 90e. The transitions are determined by where the analog signal crosses the Zero point. The deviation in electrical degrees of each state width from its ideal value of 90e. The number of electrical degrees that an analog output is greater than zero during one cycle. This value is nominally 180e or 1/2 cycle. The deviation in electrical degrees of each pulse width from its ideal value of 180e. State 1 State 2 State 3 State 4 Units Iap,Ibp, Iam, Ibm Iapp, Ibpp
State Width State Width
State Width State Width Error Error Pulse Width Pulse Width Pulse Width Pulse Width Error Error
4
Encoder Characteristics 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 State Width Error Phase Error Ipp IppA/IppB Ioffset Linearity Error Crossing (avg) Units e e A - A - A Min. -40 -40 25 0.93 -7 0 9 Max. 40 40 95 1.16 7 12 35
Mounting Considerations Parameter Radial Tangential Gap O.R. CPR Units microns microns microns mm Count Tolerance 200 400 50 - 460 20.2 1800
Mounting Consideration
4.23 0.13 (0.17 0.005) 5.32 MAX. (0.209)
SEE NOTE 1 Rm Rop
C OF ALIGNMENT TAB L 6.30 MAX. (0.248) 6.50 MIN. (0.256)
2.03 MIN. (0.080) 1.0 DEEP MIN. (0.039) 2X R Rm = Rop - 0.14 (0.006) 2.03 HOLE MIN. (0.080) 1.0 DEEP MIN. (0.039)
NOTE: THESE DIMENSIONS INCLUDE SHAFT END PLAY AND CODEWHEEL WARP. ALL DIMENSIONS FOR MOUNTING THE MODULE/CODESTRIP SHOULD BE MEASURED WITH RESPECT TO THE TWO MOUNTING POSTS, SHOWN ABOVE. DIMENSIONS IN MILLIMETERS (INCHES).
5
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 2.30 (0.091) Rop + 3.40 (Rop + 0.134)
Units mm (inch) mm (inch) mm (inch) mm (inch)
Notes
Includes eccentricity errors
1.04 (0.041) 0.76 (0.030) 3.60 (0.142)
mm (inch)
Analog Encoder Interface Circuit The circuit shown can be used to convert the current to voltage output. Resistor value R1 and Capacitor C are specified to attain required gain and low pass filtering which are application specific. The gain is chosen to attain maximum output swing and not clamping the op-amp. VREF should be set to 1.4 V 0.2 V. A 0.1 F bypass capacitor is recommended to be placed within 1 cm of the encoder for optional power supply noise rejection. Output are high impedance (typical 1M Ohm) and susceptible to EMI.
VREF I+ + - C VA
IA-IN R1
VREF I+ + - C VB
IB-IN R1
VREF = 1.4 V 0.2 V (DC)
6
Ordering Information HEDS - 971 Option Lead Configurations 0 - Straight leads 1 - Bent leads Resolution 1 - 360 LPI Bracket Option 50
Package Dimensions Option 50
LEAD THICKNESS = 0.25 mm LEAD PITCH = 2.54 mm 3.8 0.5 R 1.4 5.5 0.3 R 2.6 3.0 OPTION CODE 10.8 0.5
CH A CH B GND VCC
PIN 1 ID
1.4
8.7
AGILENT
XXXXX X
50
7.0 12.6 0.5
6.4 3.9
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 8.4 PART # (REFER -05) 15.0 20.2 0.5 1.8 C = COUNTRY OF ORIGIN MARKING (REFER -05 FOR DETAILS) DATE CODE
9.8
Bent Version - Option 50
LEAD THICKNESS = 0.25 mm LEAD PITCH = 2.54 mm 6.0 3.0 0.3 GND VCC R 1.4 CH A CH B 5 TYP. OPTION CODE PIN 1 ID
R 2.6
C
YYWW
50
5.0
4.2
1.4
8.7
6.4 3.9
9.2 0.3 5.0 4.2
AGILENT XXXXX X
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 8.4 PART # (REFER -05) 15.0 20.2 0.5 1.8 C = COUNTRY OF ORIGIN MARKING (REFER -05 FOR DETAILS) DATE CODE
9.8 3.8
0.5
10.8 0.5
7
C
YYWW
Wave Soldering Profile Pb-Free Wave Soldering Profile Std-Profile
7 sec MAX. 260C
Y-AXIS
Parameter A Solder Pot Temperature B Preheat Zone Temperature C Dip in Time
Min. NA 85 5 NA 200
Max. 260 120 7 NA NA
Nominal Values 250 - 260 100 - 120 5 NA 200
Units C C sec C C
FLOW 120C/20 sec MAX. X-AXIS COOL DOWN
D Solder Pot Zone (PCB Top) E Solder Pot Zone (Encoder Lead)
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. Copyright (c) 2004 Agilent Technologies, Inc. March 18, 2004 5989-0702EN

▲Up To Search▲

Price & Availability of HEDS-9710-150

	To Download HEDS-9710-150 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .