GLM700ASB family. Tooth sensor module with integrated magnet DATA SHEET

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1 The sensor modules of the GLM700ASB-Ax family are designed for use with assive measurement scales. The modules combine a GiantMagnetoResistive (GMR) tooth sensor with an integrated bias magnet in a comact SMD housing, to reduce the design and assembly effort of the user. In addition, the integration of sensor and magnet rovides a very high quality of the sensor signals. Adated to a variety of tooth itches, the integrated GMR sensors aly the FixPitch technology. This means that the sensor chi is matched to a given tooth itch. In use with a ferromagnetic scale and a matching itch, the module delivers two 90 degree hase shifted analogue signals (sine and cosine). The table Product overview on age 7 shows the modules available with the according itch. Product Overview Article descrition GLM7xxASB-Ax For order information see age 7. Quick Reference Guide Package Module, combining a sensor and a magnet for a variety of tooth itches with sine and cosine outut signal. Symbol Parameter Min. Ty. Max. Unit V CC Suly voltage V V eak Signal amlitude er V CC 1) mv/v Ambient temerature C f Frequency range MHz 1) The amlitude deends on the distance between sensor and scale. For further information see Fig. 6 (age 4). Absolute Maximum Ratings In accordance with the absolute maximum rating system (IEC6014). Symbol Parameter Min. Max. Unit V CC Suly voltage V Ambient temerature C T stg Storage temerature C MSL Moisture sensitivity level 2 Features Gear tooth sensor with integrated magnet Differential sine and cosine outut signals Ambient temerature range from -40 C to +125 C Designed for vertical or horizontal mounting High signal quality due to FixPitch technology Contactless, wear-free measurement Advantages Allows use of simle assive toothed structures as measurement scale; so reducing design, manufacturing and assembly effort Flexible design otions due to identical in arrangements Reliable oeration in difficult environments High interolation ossible within tooth itch for high resolution and high accuracy Minimal offset voltage Low ower consumtion for battery-driven alications Alications Incremental encoder for linear or rotary motion in various industrial alications, for examle: Linear osition measurement Linear and rotary bearings Stresses beyond those listed under Absolute maximum ratings may cause ermanent damage to the device. This is a stress rating only and functional oeration of the device at these or any other conditions beyond those indicated in the oerational sections of this secification is not imlied. Exosure to absolute maximum rating conditions for extended eriods may affect device reliability. Page 1 of 10

2 Electrical Data = 25 C; unless otherwise secified. Symbol Parameter Conditions Min. Ty. Max. Unit V CC Suly voltage V TC RB Temerature coefficient of R B and R S = ( ) C %/K TC Voff Temerature coefficient of V off = ( ) C µv/v/k Ambient temerature C V eak 1) Signal amlitude er V CC mv/v TC Veak Temerature coefficient of V eak = ( ) C %/K f Frequency range 2) MHz 1) The amlitude deends on the distance between sensor and scale. See Fig. 1 (age 4) for more information. 2) No significant amlitude loss in this frequency range. Product Tye Secific Data Article descrition Pitch Offset Voltage Bridge resistance ) Sensor resistance 4) Air ga 5) GLM711ASB-Ax 1 mm ±.0 mv/v 5.5 kω 2.75 kω 200 µm GLM712ASB-Ax 2 mm ±.5 mv/v 5.7 kω 2.85 kω 400 µm GLM71ASB-Ax mm ±.5 mv/v 5.7 kω 2.85 kω 600 µm GLM714ASB-Ax 0.94 mm (module 0.) ±.0 mv/v 5.6 kω 2.80 kω 190 µm GLM715ASB-Ax 1.57 mm (module 0.5) ±.0 mv/v 5.8 kω 2.90 kω 10 µm ) Bridge resistance between ad 1 and 5, 2 and 6. Resistor tolerance ±15 %. 4) Sensor resistance between ad and 4. Resistor tolerance ±15 %. 5) Otimal air ga between sensor and scale - for further information see Fig. 6 (age 4). Page 2 of 10

3 Tyical Performance Grahs Fig. 1: Design of the GLM module. Fig. 2: Functional rincile of tooth sensor module. Fig. : Allocation of the sensor resistors. Fig. 4: Tyical outut signals (V CC = 5 V). Fig. 5: Passive measurement scales. In addition to gear teeth a variety of other tooth-like structures can be used with the GLM tooth sensor module. Module vs. Tooth Pitch To calculate the modules or the tooth itch you can use these formula: m = d = z π m = module of the gearwheel d = reference diameter (in mm) z = number of teeth on the erimeter = tooth itch (in mm) Page of 10

4 Tyical Performance Grahs Fig. 6: Tyical sensor outut signal at a rectangular shaed tooth structure as a function of the air ga (distance between the sensor module and the tooth structure). Fig. 7: Tyical sensor outut signal at a rectangular shaed tooth structure as a function of the tooth height. Fig. 8: Tyical sensor outut signal at a rectangular shaed tooth structure as a function of the land-itch-factor x = P/w. P: itch w: tooth toland width Page 4 of 10

5 Pinning Pad Symbol Parameter 1 +V O1 Positive outut voltage bridge 1 2 +V O2 Positive outut voltage bridge 2 V CC Suly voltage 4 GND Ground 5 -V O1 Negative outut voltage bridge 1 6 -V O2 Negative outut voltage bridge 2 Fig. 9: Pinning of GLM700ASB. Dimensions Fig. 10: PCB outline (all dimensions in mm unless otherwise secified). Page 5 of 10

6 Recommended tooth rofiles h tooth height w tooth to land width g tooth ga d air ga signal quality Magnetically soft materials must be used for the measurement scale, e.g.: St7 St44 (1.007) (1.0044) X20Cr1 X0Cr1 (1.4021) (1.4028) The tooth ga can be filled by a chrome coating or by other non-ferromagnetic materials if the alication requires a smooth surface. X46Cr1 (1.404) This table is intended only as a rough guide. Please contact your sales engineer for further details. 9SMnPb28 (1.0718) X6Cr17 (1.4016) 9SMnPb29 (1.077) X14CrMoS17 (1.4104) X17CrNi16 2 (1.4057) 20MnV6 (1.5217) X9CrMo17 1 (1.4122) X90CrMoV18 (1.4112) Page 6 of 10

7 Purchased Parts Package and Delivery Form Quantity Part Descrition 20 GLM7xxASB-AC Waffle ack for horizontal mounting 120 GLM7xxASB-AH Tray for vertical mounting Order Code Product Overview Article descrition Pitch Marking 1) Delivery form 2) Article number GLM711ASB-AC 1 mm B$& Waffle Pack GLM712ASB-AC 2 mm E$& Waffle Pack GLM71ASB-AC mm F$& Waffle Pack GLM714ASB-AC 0.94 mm (module 0.) A$& Waffle Pack GLM715ASB-AC 1.57 mm (module 0.5) D$& Waffle Pack GLM715ASB-AH 1.57 mm (module 0.5) D$& Tray ) $ - calender week (A:1/2, B:/4, ), & - Year (E:201, F:2014, ). 2) The delivery form Tray is used for the automatic vertical assembly of the GLM module. Note: for all GLM700 tyes delivery form Tray (for vertical mounting) is available on request. Page 7 of 10

8 Additional Information on Ordering Code Secial Design Features Sensors with PerfectWave design rovide the best signal quality, highest accuracy and otimal sensor linearity by filtering out higher harmonics in the signal. The linearity of the sensor is assured, even for weak magnetic field measurement. FixPitch sensors are adated to the ole length (itch) of the measurement scale. The linearity of the sensor is otimized and the influence of interference fields is minimized. Page 8 of 10

9 General Information Product Status Article GLM7xxASB-Ax Note Status The roduct is in series roduction. The status of the roduct may have changed since this data sheet was ublished. The latest information is available on the internet at Disclaimer Sensitec GmbH reserves the right to make changes, without notice, in the roducts, including software, described or contained herein in order to imrove design and/or erformance. Information in this document is believed to be accurate and reliable. However, Sensitec GmbH does not give any reresentations or warranties, exressed or imlied, as to the accuracy or comleteness of such information and shall have no liability for the consequences of use of such information. Sensitec GmbH takes no resonsibility for the content in this document if rovided by an information source outside of Sensitec roducts. In no event shall Sensitec GmbH be liable for any indirect, incidental, unitive, secial or consequential damages (including but not limited to lost rofits, lost savings, business interrution, costs related to the removal or relacement of any roducts or rework charges) irresective the legal base the claims are based on, including but not limited to tort (including negligence), warranty, breach of contract, equity or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, Sensitec roduct aggregate and cumulative liability towards customer for the roducts described herein shall be limited in accordance with the General Terms and Conditions of Sale of Sensitec GmbH. Nothing in this document may be interreted or construed as an offer to sell roducts that is oen for accetance or the grant, conveyance or imlication of any license under any coyrights, atents or other industrial or intellectual roerty rights. Unless otherwise agreed uon in an individual agreement Sensitec roducts sold are subject to the General Terms and Conditions of Sales as ublished at Sensitec GmbH Georg-Ohm-Str Lahnau Germany Tel Fax Page 9 of 10

10 General Information Alication Information Alications that are described herein for any of these roducts are for illustrative uroses only. Sensitec GmbH makes no reresentation or warranty whether exressed or imlied that such alications will be suitable for the secified use without further testing or modification. Customers are resonsible for the design and oeration of their alications and roducts using Sensitec roducts, and Sensitec GmbH accets no liability for any assistance with alications or customer roduct design. It is customer s sole resonsibility to determine whether the Sensitec roduct is suitable and fit for the customer s alications and roducts lanned, as well as for the lanned alication and use of customer s third arty customer(s). Customers should rovide aroriate design and oerating safeguards to minimize the risks associated with their alications and roducts. Sensitec GmbH does not accet any liability related to any default, damage, costs or roblem which is based on any weakness or default in the customer s alications or roducts, or the alication or use by customer s third arty customer(s). Customer is resonsible for doing all necessary testing for the customer s alications and roducts using Sensitec roducts in order to avoid a default of the alications and the roducts or of the alication or use by customer s third arty customer(s). Sensitec does not accet any liability in this resect. Life Critical Alications These roducts are not qualified for use in life suort aliances, aeronautical alications or devices or systems where malfunction of these roducts can reasonably be exected to result in ersonal injury. Coyright 2015 by Sensitec GmbH, Germany All rights reserved. No art of this document may be coied or reroduced in any form or by any means without the rior written agreement of the coyright owner. The information in this document is subject to change without notice. Please observe that tyical values cannot be guaranteed. Sensitec GmbH does not assume any liability for any consequence of its use. Sensitec GmbH Georg-Ohm-Str Lahnau Germany Tel Fax sensitec@sensitec.com Page 10 of 10