REDROCKTM RR120 SERIES TMR DIGITAL SENSOR TM 1 Description 2 Features The RedRock 120 Series is an integrated digital magnetic sensor ideal for use in medical, industrial, automotive and consumer switching applications. Based on patented Tunneling Magnetoresistance (TMR) technology with CMOS process, the RR120 Series can function even in low magnetic fields with large air gaps. The RR120 Series provides high sensitivity with low power consumption in a small footprint package. u High sensitivity Stable temperature performance u Resistant to mechanical stress u Low power consumption u High frequency performance u Logic output for design flexibility u REACH Compliant u RoHS Compliant u *Please note: the RR120 Series is not recommended for new designs. Please reference the RR121. 3 Applications Door or lid closure detection Smart phones, tablets and laptops u Bare glass reed switch replacement u Motor controllers u Proximity detection u Open-close detection u Water, electric and gas meters u Fluid level detection u "Wake-Up" functionality u u Top View 2.9 (0.114) 1.4 (0.057) 3 2.8 1.6 (0.063) (0.110) 4 Dimensions Millimeters (Inches) 1 Top View 0.4 (0.016) 1.90 (0.075) 2.90 0.15 (0.114 .006) 1.45 0.20 (0.057 .008) 1.20 0.20 (.047 .008) 0.10 0.10 (.004 .004) 2.80 0.25 (.110 .010) 2 End View 0.44 0.15 (.017 .006) 0.6 (0.024) Vdd 1 1.60 0.15 (0.063 .006) 3 Side View 0.40 0.15 (.016 .006) 1.90 (0.075) VOUT GND 2 1.10 0.15 (.043 .006) 5 Device Nomenclature Ordering Information Part Number RR120-A X 1 X-X 0 Package Model Number 0 - SOT-23 Magnetic Sensitivity (G) Special Feature A - Op = 30 Rel = 15 0 - N/A Temp Rating (C) 1 - Industrial (-40 - +85) Magnetic Polarity Power Rating 1 = Unipolar 1 - Default Value (401) 943-2686 | redrock@cotorelay.com | www.cotorelay.com Copyright 2018. All rights reserved. | rev. 06132018 | page 1 REDROCKTM RR120 SERIES TMR DIGITAL SENSOR TM 6 Specifications Parameters Units Min Typ Max Operate Sensitivity G 20 30 40 Release Sensitivity G 8 15 25 OPERATING CHARACTERISTICS 1 Hysteresis G 15 Operate Time ms 30 Release Time ms 30 G/C -0.07 Temperature Coefficient of Operate Sensitivity ELECTRICAL CHARACTERISTICS 1 Supply Voltage (Vdd) V Average Current Drain 2.7 3.0 3.6 nA 250 Output Voltage (High)2 (Vouth) V 2.7 V Output Voltage (Low)2 (Voutl) V 0.2 V ABSOLUTE ENVIRONMENTAL RATINGS Operating Temperature: Industrial C -40 85 Storage Temperature C -55 150 Soldering Temperature (3 cycles, 1 min.) C 260 Operating Magnetic Field G 100 ESD Level (HBM) V 4000 Notes: 9 Magnetic Field vs. Output Status 7 Sensor Polarity Diagram S 60 50 40 20 VOUT OUTPUT STATUS (VOLTS) 4.0 2 Output OFF 3.0 BRP = 15G Switch to Low 5.0 1 HYSTERESIS BOP-BRP = 50% BOP 10 N 3 BOP = 30G 30 Switch to High 2. See "Magnetic Field vs. Output Status" (at right) for more details. MAGNETIC FIELD (GAUSS) 1. All characteristics as measured at 25C Characteristic Output ON BRP B > BOP Low Null or Weak Magnetic Field B < BRP High South Pole B > BOP High BOP OUTPUT HIGH = OFF B+ BHYS 2.0 Conditions Output North Pole 1.0 OUTPUT LOW = ON 8 Digital Function Block Diagram VDD CURRENT SOURCE 0.0 TIME 10 MTJ Sensor Location Diagram DUTY CYCLE CONTROL 3 TMR SENSOR Bop /Brp Comparators VREF OUTPUT LOGIC & LATCH DIGITAL PUSH-PULL OUTPUT A C 1 GND page 2 | Copyright 2018. All rights reserved. | rev. 06132018 A Nominal Dimensions 1.60 B 2.90 C 0.80 D 1.45 Symbols D 2 B (401) 943-2686 | redrock@cotorelay.com | www.cotorelay.com REDROCKTM RR120 TMR SERIES TECHNICAL & APPLICATION NOTES TM 11 TMR Sensor & Switch Packaging Standard packaging is Tape & Reel containing 3,000 pieces. Below is a chart of Tape & Reel dimensions for standard TMR products. 4.0 0.01 O1.5 +0.1 -0 2.0 0.05 8.0 0.2 1.75 0.1 3.5 0.05 2.75 4.0 0.01 see Fig. B below see Fig. A below O1.1 0.1 0.20 0.05 Ao3.3 0.1 2.55 0.1 Bo3.2 0.1 .3 R0 0.2 0.4 0.6 0.8 0.8 0.6 0.4 0.2 O178.00.05 5 4 3 2 1 00.75mm O60.00.05 1.5 O60.00.05 O178.00.05 00.95mm 2.20.05 +1.5 9.0 -0 10.6 1 2 .3 .3 Ko1.47 0.1 Fig. B 1.5 4 5 MAX. R0 R0 0.6 Fig. A 3 R 1.1 0.1 5 MAX.(2X) 5 MAX.(2X) 3 0. 5 MAX.(2X) EIAJ +1.5 O13.50.05 (401) 943-2686 | redrock@cotorelay.com | www.cotorelay.com 9.0 -0 Copyright 2018. All rights reserved. | rev. 06132018 | page 3 REDROCKTM RR120 TMR SERIES TECHNICAL & APPLICATION NOTES 12 Suggested Solder Pad Layout TM 13 Suggested Reflow Profile 3X 0.030 60 SECONDS MAXIMUM 15-25 s Typical Cool Down 2-4 C/s Temperature (C) 0.062 260 C Max (Lead-Free) 240-250 C Max Range (Leaded) 250 3X 0.047 0.124 200 150 Soak 100 Preheat at 2-3 C/s 50 0 50 50 150 200 Time (s) 0.037 0.075 (Units in mm) Notes: 1. Fully compatible with standard no-lead solder profile, 260 C for 1 minute max (3 cycles max) 2. Profile shown as example. Users are advised to develop their own board-level profile 3. Temperature tolerance: +0 C, as measured at any point on the package or leads 4. MSL rating of 1 compatible with J-STD-020 or equivalent. 14 Application Circuits Vdd 1 0.1mF RR120 2 VOUT 3 GND RR120 Digital Output Application Circuit The output voltage on the RR120 is active low, meaning that while a sufficiently strong magnetic field is present, the output voltage is low. The output voltage can be connected to a digital I/O pin on a microcontroller. A decoupling capacitor between the supply voltage and ground is required with placement close to the magnetic sensor. A typical capacitor value of 0.1 mF will suffice. page 4 | Copyright 2018. All rights reserved. | rev. 06132018 (401) 943-2686 | redrock@cotorelay.com | www.cotorelay.com 250 TM REDROCKTM RR120 TMR SERIES TECHNICAL & APPLICATION NOTES 15 Glossary of Terms Hysteresis: Hysteresis refers to the difference between two points Operate Time: The operate time is the difference, in time, between of interest for a particular device. For digital sensors and switches, it represents the difference between the operate sensitivity and the release sensitivity, expressed either as an absolute value (BOP - BRP) or the % difference (BOP - BRP)/BOP. For an analog sensor, the hysteresis is the difference between the "magnet approach curve" and the "magnet recede curve." the application of a magnetic field and the output response of the device. In an analog sensor, the response is a change in output resistance. In a digital sensor, the response is a change in state of the electrical output. Magnet Approach Curve: The magnet approach curve is the characteristic change in resistance of an analog TMR sensor as an applied magnetic field approaches the sensor, typically plotted as a function of the magnetic field strength. Magnet Recede Curve: The magnet recede curve is the characteristic change in resistance of an analog TMR sensor as an applied magnetic field recedes from the sensor, typically plotted as a function of the magnetic field strength. Release Sensitivity: The release sensitivity defines the lower limit of the strength of an applied magnetic field that a digital TMR sensor or switch must release. Release Time: The release time is the difference, in time, between the removal of an applied magnetic field and the output response of the device. In an analog sensor, the response is a change in output resistance. In a digital sensor, the response is a change in state of the electrical output. Tunnel Magnetoresistance (TMR): Tunnel Magnetoresistance is the magnetoresistive effect that occurs in a magnetic tunnel junction. Magnetoresistance: Magnetoresistance is a phenomenon wherein the electrical resistance of certain materials changes when exposed to an externally-applied magnetic field. Magnetic Transfer Curve: The magnetic transfer curve defines the characteristic behavior of an analog TMR sensor by combining both the magnet approach curve and the magnet receive curve together. Magnetic Tunnel Junction: A magnetic tunnel junction is a thin film structure consisting of two magnetic layers separated by a thin insulator. Because the insulating layer is thin enough (typically a few nanometers), electrons can tunnel from one magnetic layer into the other. Operate Sensitivity: The operate sensitivity defines the upper limit of the strength of an applied magnetic field that a digital TMR sensor or switch must operate. (401) 943-2686 | redrock@cotorelay.com | www.cotorelay.com Copyright 2018. All rights reserved. | rev. 06132018 | page 5 REDROCKTM RR120 TMR SERIES TECHNICAL & APPLICATION NOTES TM 16 Magnetic Sensitivity Maps Magnetic sensitivity maps show the operate and release loci in threedimensional space when a magnet is presented to a magnetically operated switch or sensor. The absolute operate and release distances between the magnet and the sensor will vary depending on the sensitivity of the switch and the strength of the magnet. However, the shape and direction of the operate loci stay relatively constant except for cases where the magnet is physically much larger than the sensor. These plots were generated using a 2mm^3 cubic shaped NdFeB N52 magnet with its North pole presented to the ground pin and a South pole presented to the opposite side. RR120 Magnetic Sensitivity Pattern, perspective view RR120 Magnetic Sensitivity Pattern, YZ plane * Operate Points Release Points RR120 Magnetic Sensitivity Pattern, XY plane page 6 | Copyright 2018. All rights reserved. | rev. 06132018 RR120 Magnetic Sensitivity Pattern, XZ plane (401) 943-2686 | redrock@cotorelay.com | www.cotorelay.com