DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 7

Technical content

Datasheet V1.0a TMR400X TMR Gear tooth sensor with high sensitivity to magnetic field General Description The TMR400X magnetic gear tooth sensors utilize a unique push -pull Wheatstone bridge design, including one or two Wheatstone full bridges, with four or eight unshielded high sensitivity TMR sensing elements. The Wheatstone bridge creates a differential voltage output with respect to the magnetic field gradient along the sensor’s sensitive directi on. In the dual -bridge configuration, the two orthogonal Wheatstone full bridges provide sine and cosine voltage signals that can be used to measure both the gear tooth position and the direction of motion. The TMR400X magnetic gear tooth sensors offer sup erior performance with high sensitivity to the magnetic field gradient. They can detect very small changes in magnetic field, along with good temperature stability of the output signal. The TMR400X magnetic gear tooth sensors are available in 6 different standard spacings of 0.25mm, 0.5mm, 0.75mm, 1.0mm, 2.0mm, and 3.0mm. Two types of small form factor LGA packages are available. The package dimensions are 3mm × 3mm × 0.9mm, and 3mm × 6mm × 0.9mm. Features and Benefits  Tunneling Magnetoresistance (TMR) Technology  High Saturation Point Allowing Operation under Large DC Magnetic Field  Wide Air-Gap Tolerance  High Sensitivity to Magnetic Field Gradient  Capable of Small-Pitch Gear Tooth Detection  DC(Zero-Speed) Operation  Sine/Cosine Signal Outputs with Precise Phase Shift  Excellent Thermal Stability  Good Immunity to Environmental Magnetic Field  Compact Ultra-Thin Package

Applications

 Gear Tooth Motion, Speed, and Direction Sensing  Linear and Rotary Speed Sensing  Linear and Rotary position Sensing  Linear Magnetic Scales  Magnetic Encoders TMR400X

Datasheet V1.0a Wheatstone Bridge Connection Single-Bridge Configuration Dual-Bridge Configuration Pin Configuration *TMR4009 is LGA6L(3x8) package Direction of Sensitivity （Bottom View） （Top View） Single-Bridge LGA6L (3x3) Direction of Sensitivity Dual-Bridge LGA6L (3x3) （Bottom View） （Top View） TMR4004 TMR4005 TMR4001 TMR4002 TMR4003 Direction of Sensitivity Dual-Bridge LGA6L (3x6) （Bottom View） （Top View） TMR4006 TMR4007 TMR4008

Datasheet V1.0a Pin No. Pin Name Pin Function

1 V1- Differential Output (-) of Bridge 1

2 V2- * Differential Output (-) of Bridge 2 *

3 GND Ground

4 V2+ * Differential Output (+) of Bridge 2 *

5 V1+ Differential Output (-) of Bridge 1

6 VCC Supply Voltage

Parameter Symbol Limit Unit Supply Voltage VCC 7 V Reverse Supply Voltage VRcc 7 V Magnetic Field H 1500 Oe (1) ESD Voltage VESD 4000 V Operating Temperature TA -40 ~ 125 °C Storage Temperature Tstg -50 ~150 °C Specification (VCC=1.0V, TA=25° C, Differential Output) Parameter Symbol Conditions Min Typ Max Unit Supply Voltage VCC Operating 1 7 V Supply Current ICC Output Open 67(2) μA Bridge Resistance R 15(3) kOhm Single Resistor Sensitivity SEN - 0.46 %ΔR/Oe Saturation Field Hsat ±70 (4) Oe Linear Range 1 LIN1 Linearity ≥ 98% ±20 Oe Linear Range 2 LIN2 Linearity ≥ 95% ±40 Oe Offset Voltage Voffset -20 20 mV/V Hysteresis Hys Fit @± 20 Oe 1 %FS Maximum Differential Voltage Output VoutMax 650 mV/V Temperature Coefficient of Resistance TCR H = 0 Oe -985 PPM/° C Temperature Coefficient of Sensitivity TCS -1800 PPM/° C Note: (1) 1 Oe (Oersted) = 1 Gauss in air = 0.1 millitesla = 79.8 A/m. (2) Supply current is determined by the resistance of the sensor. (3) Custom sensor resistance may be available upon request. (4) The sensors may saturate if the magnetic field exceeds this range. Saturation field can be custom designed to meet special requirements.

Datasheet V1.0a TMR Element Layout Part Number Single/ Dual Bridge TMR Element Spacing (mm) (TMR elements are placed symmetrially with respect to the center of the package, which is marked by the “+”symbol.) Approx. Gear Tooth Pitch Range Package Format TMR4001 Single optimal pitch at 0.5mm LGA6L (3x3) TMR4002 Single optimal pitch at 1.0mm LGA6L (3x3) TMR4003 Single optimal pitch at 1.5mm LGA6L (3x3) TMR4004 Dual optimal pitch at 1.0mm LGA6L (3x3) TMR4005 Dual optimal pitch at 2.0mm LGA6L (3x3) TMR4006 Dual optimal pitch at 4.0mm LGA6L (3x6) TMR4007 Dual optimal pitch at 6.0mm LGA6L (3x6) TMR4008 Dual optimal pitch at 8.0mm LGA6L (3x6) TMR4009 Dual optimal pitch at 10.0mm LGA6L (3x8)

Datasheet V1.0a

Package Information

LGA6L (3x3) package drawing: Unit: mm LGA6L (3x6) package drawing: Unit: mm

Datasheet V1.0a TMR Sensor Position LGA6L (3x3) LGA6L (3x6) Top view and side view(unit: mm)

Datasheet V1.0a MultiDimension Technology Co., Ltd. Address:No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, China Web: www.dowaytech.com/en Email: info@dowaytech.com The information provided herein by MultiDimension Technology Co., Ltd. (hereinafter MultiDimension) is believed to be accurate and reliable. Publication neither conveys nor implies any license under patent or other industrial or intellectual property rights. MultiDi mension reserves the right to make changes to product specifications for the purpose of improving product quality, reliability, and functionality. MultiDimension does not assume any liability arising out of the application and use of its products. MultiDimension’s customers using or selling this product for use in appliances, devices, or systems where malfunction can reasonably be expected to result in personal injury do so at their own r isk and agree to fully indemnify MultiDimension for any damages resulting from such applications.