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PNI RM3000-f User Manual

Geomagnetic sensor suite
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RM3000-f & RM2000-f
Geomagnetic Sensor Suite

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Summary of Contents for PNI RM3000-f

  • Page 1 User Manual RM3000-f & RM2000-f Geomagnetic Sensor Suite...

  • Page 2: Table Of Contents

    Table of Contents COPYRIGHT & WARRANTY INFORMATION ............4 INTRODUCTION ......................5 SPECIFICATIONS ....................... 6 GEOMAGNETIC SENSOR SUITE CHARACTERISTICS ......6 SEN-XY-F AND SEN-Z-F CHARACTERISTICS ..........7 3D MAGIC CHARACTERISTICS ..............8 TYPICAL SENSOR SUITE OPERATING PERFORMANCE ......9 DIMENSIONS, PACKAGING, AND PAD & MASK LAYOUT ......13 3.5.1 Sen-XY-f ...................
  • Page 3 Figure 3-17: 3D MagIC MLF Tape Dimensions ..............18 Figure 3-18: Recommended Solder Reflow Profile ..............19 Figure 4-1: RM3000-f reference schematic – Standard Mode ..........21 Figure 4-2: LR Oscillator Circuit Biasing Diagram ..............22 Figure 4-3: RM3000-f North-East-Down (NED) Sensor Layout ..........23 Figure 4-4: SPI Timing Diagram .....................

  • Page 4: Copyright & Warranty Information

    PNI warrants that each Product to be delivered hereunder, if properly used, will, for ninety (90) days following the date of shipment unless a different warranty time period for such Product is specified: (i) in PNI’s Price List in effect at time of order acceptance; or (ii) on PNI’s web site (www.pnicorp.com) at time of order acceptance, be free from defects in material and workmanship and will operate in accordance...

  • Page 5: Introduction

    Sen-XY-f geomagnetic sensors (pn 13060) and a 3D MagIC ASIC MLF controller (pn 12927), and this forms the basis for a 2-axis (horizontal) digital compass. The RM3000-f is the same as the RM2000-f but adds a Sen-Z-f geomagnetic sensor (pn 13070 or pn 13101), such that compassing measurements are not constricted to the horizontal plane.

  • Page 6: Specifications

    Operating at greater cycle counts will increase power consumption but have diminishing returns in terms of improved resolution due to noise. PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 6 of 42...

  • Page 7: Sen-Xy-F And Sen-Z-F Characteristics

    [oz] Operating Temperature Footnote: 1. 1 V peak-to-peak across the coil @ 100 kHz (sinewave). No DC bias resistance. Measured orthogonal to Earth’s magnetic field. RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 7 of 42...

  • Page 8: Magic Characteristics

    High level output current Low level output current Idle Mode Current µA Leakage Current @ DV =0V, DV =3.6V) Operating Temperature PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 8 of 42...

  • Page 9: Typical Sensor Suite Operating Performance

    250 cycle counts. Operation in Standard Mode at more than 250 cycle counts usually is inefficient since more time and power is consumed per measurement, with diminishing returns in usable (noise-limited) resolution. RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 9 of 42...

  • Page 10: Figure 3-2: Gain Vs. Cycle Counts - Standard & Legacy Modes

    Legacy Mode (default config.) 1000 1000 10000 Cycle Counts Figure 3-3: Single-Axis Sample Rate vs. Cycle Counts – Standard & Legacy Modes PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 10 of 42...

  • Page 11: Figure 3-4: Gain Vs. Cycle Counts - Standard Mode

    (Resolution = 1/Gain, to the system’s noise limit) 3000 2700 2400 2100 1800 1500 1200 Cycle Counts Figure 3-5: Single-Axis Sample Rate vs. Cycle Counts – Standard Mode RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 11 of 42...

  • Page 12: Figure 3-6: Current Consumption Vs. Cycle Counts - Standard Mode

    Cycle Counts Figure 3-6: Current Consumption vs. Cycle Counts – Standard Mode PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 12 of 42...

  • Page 13: Dimensions, Packaging, And Pad & Mask Layout

    Dimensions in mm Full reel is 5000 pcs. Smaller quantities on cut tape. Tape & reel meets ANSI/EIA standard EIA-418-B Figure 3-8: Sen-XY-f Tape and Reel Dimensions RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 13 of 42...

  • Page 14: Sen-Z-F (13070)

    Note: PNI recommends a 5 mil stencil. The solder paste area is much smaller than the pad to reduce sensor tilt and misalignment. The above layout allows for rework: for minimal footprint, contact PNI. Figure 3-9: Sen-XY-f Recommended Solder Pad, Paste, & Mask Layout 3.5.1 Sen-Z-f (13070)

  • Page 15: Figure 3-11: Sen-Z-F (13070) Tape And Reel Dimensions

    Tape & reel meets ANSI/EIA standard EIA-418-B Figure 3-11: Sen-Z-f (13070) Tape and Reel Dimensions Note: PNI recommends a 5 mil stencil. The solder paste area is much smaller than the pad to reduce sensor tilt and misalignment. Figure 3-12: Sen-Z-f (13070) Recommended Solder Pad, Paste, & Mask Layout RM3000-f &...

  • Page 16: Sen-Z-F (13101)

    Full reel is 1200 pcs. Smaller quantities on cut tape. Tape & reel meets ANSI/EIA standard EIA-418-B Figure 3-14: Sen-Z-f (13101) Tape and Reel Dimensions PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 16 of 42...

  • Page 17: Figure 3-15: Sen-Z-F (13101) Recommended Solder Pad, Paste, & Mask Layout

    Note: PNI recommends a 5 mil stencil. The solder paste area is much smaller than the pad to reduce sensor tilt and misalignment. The above layout allows for rework: for minimal footprint, contact PNI. Figure 3-15: Sen-Z-f (13101) Recommended Solder Pad, Paste, & Mask Layout RM3000-f &...

  • Page 18: Magic

    Full reel is 5000 pcs. Smaller quantities on cut-tape. Tape & Reel meets ANSI/EIA standard EIA-418 Figure 3-17: 3D MagIC MLF Tape Dimensions PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 18 of 42...

  • Page 19: Soldering

    3.6 Soldering Figure 3-18 and Table 3-6 provide the recommended solder reflow profile and processing parameters for RM3000-f components. After soldering PNI components to a board, it is possible to wave solder the opposite side of the PCB. IMPORTANT: PNI sensors require the use of halide-free solder pastes and processes for reflow and cleaning.

  • Page 20: Table 3-6: Recommended Solder Processing Parameters

    1. Meets IPC/JEDEC J-STD-020 profile recommendations. Sen-XY-f and Sen- Z-f classified as moisture sensitivity level 1. 3D MagIC MLF classified as moisture sensitivity level 3. PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 20 of 42...

  • Page 21: Geomagnetic Sensor Suite Overview & Set-Up

    4 Geomagnetic Sensor Suite Overview & Set-Up 4.1 Overview Figure 4-1 provides a basic schematic for implementing the RM3000-f Sensor Suite in Standard Mode. The 3D MagIC is at the center of the schematic, as it ties the user’s host controller, on the left, to the three geomagnetic sensors, on the right.

  • Page 22: Figure 4-2: Lr Oscillator Circuit Biasing Diagram

    (to the noise limit) and the longer the sample time. Figure 4-2 provides a detail of the biasing circuit. For more on PNI’s magneto-inductive technology, refer to the “Magneto-Inductive Technology Overview” white paper found on PNI’s website.

  • Page 23: Layout

    4.2 Layout 4.2.1 Sensor Orientation Figure 4-3 indicates how the three geomagnetic sensors in a RM3000-f Suite should be oriented for a system referenced as north-east-down (NED). The arrow represents the direction of travel or pointing. Positioning of the sensors is not critical, other than ensuring they are not positioned close to a magnetic component, such as a speaker.

  • Page 24: Other Layout Considerations

    (e.g. off). If you are uncertain about the effect a specific component may have on the system, the RM3000-f Evaluation Board can be used to help ascertain this. Place the RM3000-f Evaluation Board on a firm surface and gradually bring the component in question close to the board, then note when the magnetic field starts to change.

  • Page 25: Table 4-1: 3D Magic Pin Assignments

    External timing resistor for high speed clock. Supply voltage for digital section of ASIC. SCLK SPI interface - Serial clock input SPI interface – Master Input, Slave Output MISO RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 25 of 42...
  • Page 26 SCLK, and remain valid for 50 ns after the edge. New data typically is presented to the MOSI pin on the falling edge of SCLK. PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 26 of 42...
  • Page 27 CLEAR can be used to stop any sensor measurement in progress. CLEAR has no effect on the SPI register state. Note: The CLEAR pin is similar to the RESET pin on PNI’s legacy ASIC. However in Standard Mode the 3D MagIC automatically resets the DRDY line, so it is not necessary to use the CLEAR pin when operating in Standard Mode.

  • Page 28: Spi Timing Requirements

    MagIC is zero (exclusively CPOL=0). Data is present on MISO or should be presented on MOSI before the first low to high clock transition (exclusively CPHA = 0). Figure 4-4: SPI Timing Diagram PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 28 of 42...

  • Page 29: Idle Mode

    Note: The 3D MagIC starts in Idle Mode when powered on. This is different from the legacy 11096 ASIC, which required cycling through one measurement request operation to put it into Idle Mode. RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 29 of 42...

  • Page 30: Magic Operation - Standard Mode

    Legacy Mode, see Section 6. Legacy Mode is intended for customers who previously used PNI’s 11096 ASIC. The 3D MagIC operates in Standard Mode when pin #12 is held LOW. The basic functions to be performed when operating the 3D MagIC are: Setting the values in the Cycle Count Registers, and Taking sensor measurements.

  • Page 31: Table 5-1: Cycle Count Register Commands

    Start with SSN set HIGH, then set SSN to LOW. Send 83 (this is the Write Command Byte to address the MSB for the X axis) RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 31 of 42...

  • Page 32: Single-Axis Measurement (Sam) Operation

    . Three (3) data bytes will be clocked out for a single-axis measurement. The Command Byte is discussed below. Figure 5-1: SPI Activity Sequence Diagram for SAM Operation PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 32 of 42...

  • Page 33: Sam Command Byte

    If another measurement is immediately made, SSN can remain LOW and the process repeated. Otherwise it is recommended that SSN is set HIGH to release the SPI bus. RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 33 of 42...

  • Page 34: Multi-Axis Measurement (Mam) Operation

    MISO line will have little meaning. SCLK should be stopped once the measurements are clocked out. PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 34 of 42...

  • Page 35: Mam Axes Select Byte

    When the host is ready to read the measured values, set SSN to LOW. If SSN already is LOW, then toggle SSN from LOW to HIGH to LOW. RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 35 of 42...
  • Page 36 Return SSN to HIGH to free up the host to communicate with other devices and to ensure the next Command Byte sent to the 3D MagIC is interpreted properly. PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 36 of 42...

  • Page 37: Magic Operation - Legacy Mode

    PNI’s 11096 ASIC. The 3D MagIC will operate in Legacy Mode when pin #12 is held HIGH. The intent of Legacy Mode is to enable the user to easily substitute PNI’s 3D MagIC for PNI’s legacy 11096 ASIC (p/n 12576).

  • Page 38: Legacy Operation Spi Activity Sequence

    Selects the number of sensor circuit oscillation cycles (cycle counts) to be counted while simultaneously using the internal fixed reference clock to measure the time to obtain this count. PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 38 of 42...

  • Page 39: Making A Legacy Measurement

    3D MagIC will present a fixed 9B on the MISO pin. Once the 8 bits have clocked in, the 3D MagIC will execute the command (i.e. take a measurement). RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 39 of 42...

  • Page 40: Enhanced Legacy Operation

    1 (64 cycle counts) such that the gain remains unchanged but the time to take the measurement, and hence power consumption, is dramatically reduced. PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 40 of 42...

  • Page 41: Clock Divide Command Byte

    The Clock Divide Register is defined as follows: Bit # Value CD2 CD1 CD0 Table 6-3: Clock Divide Bits Clock Divide Value (Standard Mode default) (Legacy Mode default) RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 41 of 42...

  • Page 42: Command Sequence For Setting Clock Divide Value

    Legacy Mode. If the Equivalent Period Select Value cannot be reduced (i.e. is at 0), then the improvement in Gain is shown. PNI Sensor Corporation Doc #1016102 r03 RM3000-f & RM2000-f Sensor Suite User Manual – August 2012 Page 42 of 42...

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