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Data Sheet
NSE-5310
Miniature Position Encoder SOIC with Zero Reference and IC Output
1 General Description
The TRACKER NSE-5310 is an incremental position sensor with onchip encoding for direct digital output. A Hall element array on the chip is used to derive the incremental position of an external magnetic strip placed above the IC at a distance of 0.3 mm (typ). This sensor array detects the ends of the magnetic strip to provide a zero reference point. The integration of Hall-effect position sensors, analog front end and digital signal processing on a single IC chip provides an ingeniously small position sensor, without the need for external pulse counters. Direct digital output is accessible over the serial interface using IC protocol. The TRACKER NSE-5310 provides absolute position information over the length of a magnet pole pair (2 mm). A user can count pole pairs and achieve absolute position information over the entire length of the magnet (essentially unlimited). With better than 0.5 micron resolution, the TRACKER is a robust, cost-effective alternative to miniature optical encoders. It can be used as a linear or off-axis rotary encoder.
2 Key Features
Direct digital output using IC protocol End-of-magnet detection for built-in zero reference 0.488 m resolution < 2 m bi-directional repeatability < 10 m absolute error On-chip temperature sensor Magnetic field strength monitor Available in TSSOP or 3.9 mm x 2.5 mm die for chip-on-board mounting Custom packaging such as wafer-level chip scale packaging can be provided. Minimum order quantities may apply. RoHS compliant
3 Applications
The NSE-5310 is ideal for Micro-actuator and servo drive feedback, Replacement for optical encoders, Optical and imaging systems, Consumer electronics, Precision biomedical devices, Instrumentation and automation, Automotive applications, and Integrated closed-loop motion systems using New Scale's SQUIGGLE micro motor.
Figure 1. TRACKER NSE-5310 Block Diagram
VDD3V3 MagINCn MagDECn
Pos Mag
VDD5V
LDO 3.3V
Sin Cos
PWM Interface
PWM SDA
DSP
Linear Hall Array & Frontend Amplifier
AGC
AGC
Temperature sensor
AGC
Absolute Interface (I2C)
SCL
AO CSn
OTP Register
NSE-5310
Programming Parameters
Incremental Interface
Prog
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Data Sheet - P i n A s s i g n m e n t s
4 Pin Assignments
Figure 2. Pin Assignments (Top View)
NC MagIncrn MagDecrn DTest1_A DTest2_B TestCoil Mode_Index VSS PDIO NC
1 2 3 4 5 6 7 8 9 10
20 19 18 17
TestBus3 VDD5V VDD3V3 TestBus0 TestBus1 PWM CSn SCL / CLK SDA / DIO I2C_A0
NSE-5310
16 15 14 13 12 11
4.1 Pin Descriptions
Table 1. Pin Descriptions Pin Name NC MagINCn MagDECn DTEST1_A DTEST2_B Coil Mode_Index VSS PDIO Pin Number 1 2 3 4 5 6 7 8 9 10 I2C A0 11 Digital input with pulldown Digital input to choose IC address by input pin. This pin is the IC address pin (0 or 1) to select the position sensor when two sensors are used. Analog I/O Digital I/O with pulldown Digital output open drain Supply pad Digital I/O Analog I/O Open drain Digital output open drain 4mA Pin Type Special Requirements Not Connected Indicates increasing or decreasing of magnitude by the AGC. Can be used for Push Button Function. Both signals are active low if AGC is in Non Valid Range and can be hooked together in wired-AND Non Valid X / Y Alignment during Align Mode Test output in default mode, A in sync mode Test output in default mode, B in sync mode Serial connection of Hall Element Coils to VSS Decimation Rate Selection internal pull down, by default DCR = 256. Static setup at power up. Ground Digital and Analog Access to PPTRIM Description
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Data Sheet - P i n A s s i g n m e n t s
Table 1. Pin Descriptions Pin Name Pin Number Pin Type Special Requirements Description DATA Input / Output for IC Mode. This pin is the I2C serial interface used to read direct position information. This pin can also be used to read the absolute magnitude of the magnetic field (used to detect the end of the magnet, as a zero reference), and the temperature sensor information. See IC User Interface on page 12 for more information. Serial Interface Unit CLK, also used for PPTIM access. Frequency up to 400 KHz. ChipSelect / DO tristate / Reset Device in TestEN Mode / Control Mode at PPTIM access 4mA ~200 Hz Pulse Width Modulation Absolute Output Analog Test Bus1 / Configurable IO Analog Test Bus0 / Configurable IO LDO Output. Positive I/O supply voltage pin. See Using 3.3V or 5V Operation on page 10 for more information. LDO Input / Connection to IO structure. Positive I/O supply voltage pin. See Using 3.3V or 5V Operation on page 10 for more information. Analog Test Bus3 / Configurable IO
SDA (DO)
12
Digital I/O / Tristate
Open Drain IC
SCL (CLK) CSn PWM TestBus1 TestBus0 VDD3V3
13 14 15 16 17 18
Digital input Digital input with pullup Digital output Analog I/O
Schmitt Trigger Input
Supply pad VDD5V TestBus3 19 20 Analog I/O
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Data Sheet - A b s o l u t e M a x i m u m R a t i n g s
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 5 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute Maximum Ratings Parameter DC Supply Voltage at pin VDD5V (VINVDD5V) DC Supply Voltage at pin VDD3V3 (VINVDD3V3) DC Supply Voltage (VDD) Input Pin Voltage (VIN) Input Pin Voltage VDD3V3 (VINVDD3V3) Input Current (latchup immunity) (Iscr) Electrostatic Discharge (ESD) Storage Temperature (Tstrg) -55 -100 Min -0.3 Max 7 5 7 VDD+ 0.3 5 100 2 125 Units V V V V V mA kV C t=20 to 40s, Norm: IPC/JEDEC J-STD-020C. The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/ JEDEC J-STD-020C "Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices". % C/W TSSOP20 / still air doc# Assy-195 Norm: Jedec 78 Norm: MIL 883 E method 3015 Except VDD3V3 Except VDD3V3 Comments
Body temperature (Lead-free package) (Tlead)
260
Humidity non-condensing Thermal Package Resistance (Rth)
5
85 114.5
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Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6 Electrical Characteristics
Table 3. Operating Conditions Symbol VDD5V VDD3V3 VDDD/ VDDA TAMB Isupp Positive I/O Supply Voltage Positive Core Supply Voltage Ambient Temperature Supply Current Parameter Conditions 5V Operation via LDO IO structure on VDD5V connected to VDD3V3 5V Operation over LDO Internal analog and digital supply -40F to +275F Min 4.5 3 3 -40 16 Typ 5.0 3.3 3.3 Max 5.5 3.6 3.6 125 21 Units V V V C mA
6.1 Magnet Input Specification
Table 4. Two Pole Cylindrical Diametrically Magnetized Source Symbol pL ppL pLV Bpk BpkV Btc Boff Vabs Parameter Pole Length Pole Pair Length Pole Length Variation Magnetic input field amplitude Magnetic input field variation Magnetic Field Temperature Drift Magnetic offset Linear travelling speed Magnetic North & South Pole % of ppL 2mm Required vertical component of the magnetic field strength on the die's surface Amplitude variation over encoder length Samarium Cobalt ReComa28 typ - 0.035 %/K Constant magnetic stray field Absolute output see note below 10 Conditions Min Typ 1 2 1.2 40 2 -0.2 5 Max Units mm mm % mT % %/K mT
Note: There is no upper speed limit for the absolute outputs. With increasing speed, the distance between two samples increases. The travelling distance between two subsequent samples can be calculated as: vsampling_dist = --fs where: sampling_distance = travelling distance between samples in mm v = travelling speed in mm/sec fs = sampling rate in Hz Pole crossings need to be tracked to calculate absolute position beyond one pole pair. The ability to differentiate pole crossings may be a speed limiting factor in such cases.
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Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6.2 Electrical System Specifications
Table 5. Electrical System Specifications Symbol RES INLopt Parameter Resolution Integral non-linearity (optimum) Conditions 0.48828125 m (max. 2mm/4096) Maximum error with respect to the best line fit. Ideal magnet, TAMB=25C Maximum error with respect to the best line fit. Ideal magnet, TAMB= -30 to +70C Best line fit =(Errmax- Errmin)/2 including magnet error, TAMB= -30 to +70C 10bit, no missing codes 1 sigma, fast mode 1 sigma, slow mode Fast mode until status bit OCF=1 Slow mode Fast mode (MODE=1) Slow mode (MODE=0 or open) TAMB=25C, slow mode fS Internal sampling rate for absolute output: TAMB= -30 to +70C, slow mode TAMB=25C, fast mode TAMB= -30 to +70C, fast mode Hyst tPwrUp CLK Hysteresis Power Up Time IC Read-out frequency Incremental output /12bit resolution Hyst=0 for absolute serial output Mode dependant Maximum clock frequency to read out serial data 2.48 2.35 9.90 9.38 2 20 400 2.61 2.61 10.42 10.42 Min Typ Max 12 5.6 Units bit m
INLtemp
Integral non-linearity (over temperature)
10
m
INL DNL TN tPwrUp tdelay
Integral non-linearity
1
40 0.97 0.6 0.3 20 80 96 384 2.74 2.87 10.94 11.46 8 80 800
m m m RMS ms s
Differential non-linearity Transition noise Power-up time System propagation delay
kHz
LSB ms kHz
1. System integral non linearity is limited by magnetic source.
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Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6.3 DC/AC Characteristics for Digital Inputs and Outputs
Table 6. CMOS Input, CMOS Input Pull Down, CMOS Input Pull Up Symbol VIH VIL3V3 VIH VIL3V3 ILEAK ILEAKLOW ILEAKHIGH Parameter High Level Input Voltage Low Level Input Voltage High Level Input Voltage Low Level Input Voltage Input Leakage Current CMOS Input Input Leakage Current CMOS Input Pull up Input Leakage Current CMOS Input Pull down Conditions Operating range VDD5V Operating range VDD3V3 Min 1.6 0.4 1.3 0.4 -1 -30 30 +1 -100 100 Typ Max Units V V A A A
Table 7. CMOS Output Symbol VOH VOL CL IO Parameter High Level Output Voltage Low Level Output Voltage Capacitive Load Output Current Conditions DVDD: Positive I/O Supply Voltage DVSS: Negative Supply Voltage Min DVDD -0.5 DVSS +0.4 50 4 Typ Max Units V V pF mA
Table 8. Tristate CMOS Output Symbol VOH VOL IOZ Parameter High Level Output Voltage Low Level Output Voltage Tristate Leakage Current Conditions DVDD: Positive I/O Supply Voltage DVSS: Negative Supply Voltage to DVDD and DVSS Min DVDD -0.5 DVSS +0.4 1 Typ Max Units V V A
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Data Sheet - D e t a i l e d D e s c r i p t i o n
7 Detailed Description
The TRACKER measures the spatially varying magnetic field produced by moving a multi-pole magnetic strip over a Hall sensor array on the NSE-5310 chip (see Figure 3). The internal sinusoidal (SIN) and phase-shifted sinusoidal (COS) signals are filtered and transformed into angle (ANG) and magnitude (MAG), representing the absolute linear position within a 2 mm pole pair on the magnet. Interpolation with 12 bit (4096) resolution yields 0.5 m position resolution. Automatic gain control (AGC) adjusts for DC bias in the magnetic field and provides a large magnetic field dynamic range for high immunity to external magnetic fields. The absolute magnitude of the magnetic field intensity is used to detect the end of the magnetic strip and serves as a built-in zero reference. The length of the magnetic strip determines the maximum measured stroke. Note: Hall sensor array and on-chip digital encoder yield absolute position within a pole pair. Use a system processor to count pole pair crossings for long-range absolute position. Figure 3. Hall Sensor Array
0. 488 m Resolution 4096 Counts / 2 mm (Counts / 360)
90 Sine
2 mm per N- S Pair
Mag
Moving Magnet
0 Cos
NS
Hall Sensor Array
N
S
NS
180
270
+Sine -Sine
Sine Sine
Angle ()
DSP
Cos Cos Magnitude
+Cos
-Cos
Amplifier with Automatic Gain Control
ADC
Digital Filter
The over travel pole crossing provides a precision home position and eliminates the need for a secondary zero reference sensor.
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Data Sheet - D e t a i l e d D e s c r i p t i o n
Figure 4. Magnetic Field Strength Used to Indicate End of Travel
Magnet Field Strength Used to Indicate End of Travel
Magnet Field Strength "Magnitude"
N N N
Normal Magnitude in Travel Range
Direction of Travel
Reduced Magnitude Detected
N
Normal Field Strength in Travel Range
S
Reduced Field Strength
S S S
Direction of Travel is Reversed
in Over-Travel Range Returns Home last pole crossing
Angle () = 0
Travel Range
Hall Sensor Array TSSOP Package
Hall Array Center Line
Over Travel
1 1/2 poles either end
A system controller and user-supplied flash memory with the TRACKER NSE-5310 provide for long-range absolute position information that is retained during sleep mode or power-down. Figure 5. Example of Absolute long-range position information with use of external flash memory and controller
S N
S N
S N
S N
Seiko Magnets 2 mm Pole Pair
Zero Ref 1 - 1/2 poles From End
6000
6 mm working range
Zero Ref 1 - 1/2 poles From End
Over travel Over travel area used area used
Cummulative TRACKER Readings (microns)
4000 2000
2000
0 0 1 2 3 4 5 6
TRACKER Readings 1000 (microns) 500
1500
0
0 1 2 3 4 5 6
Pole Crossings
Tracks Pole Crossing (0 to 6) and Tracks Pole Crossing (0 to 6) and absolute position withinaa pole pair absolute position within pole pair to 0.5 microns, 2000 micron range to 0.5 microns, 2000 micron range
System Controller
Flash Memory
Pole crossing retained in UserSupplied Flash Memory during sleep mode or shut down for retrieval during power up
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Data Sheet - D e t a i l e d D e s c r i p t i o n
7.1 Using 3.3V or 5V Operation
For 3.3V operation: Bypass the voltage regulator (LDO) by connecting VDD3V3 with VDD5V. For 5V operation: Connect the 5V supply to pin VDD5V. VDD3V3 (LDO output) must be buffered by a 2.2F to 10F capacitor placed close to the supply pin. In either case, a buffer capacitor of 100nF close to pin VDD5V is recommended. Note: Pin VDD3V3 must always be buffered by a capacitor. It must not be left floating, as this may cause an instable internal 3.3V supply voltage which may lead to larger than normal jitter of the measured position. The 3V3 output is intended for internal use only. It must not be loaded with an external load. The output voltage of the digital interface I/Os corresponds to the voltage at pin VDD5V, as the I/O buffers are supplied from this pin. Figure 6. Connections for 3.3V or 5V Supply Voltage
3.3V Operation
5V Operation
1... 10F VDD3V3 100n 100n VDD5V LDO Internal VDD DO + 4.5 - 5.5V I N T E R F A C E PWM CLK CSn VDD3V3 Internal VDD DO
VDD5V
LDO
+ 3.0 - 3.6V -
I N T E R F A C E
PWM CLK CSn
VSS
Prog
VSS
Prog
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Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
8 Application Information
Figure 7. TRACKER NSE-5310 Evaluation Board
Figure 7 shows NSE-5310 SOIC mounted on a PCB with FPC connector for ease of handling. A multipole linear magnetic strip is positioned above the sensor.
8.1 Hall Sensor Array
Eight Hall Sensor Front End cells are connected to two current summation busses which end into two Active Load circuits. The Hall elements are arranged in an even linear array. The array is divided into four quadrants. For normal operation (position encoding), two opposite quadrants are summed up differentially to neglect magnetic offsets. The 90 degree angular shift of the quadrant pairs produces 90 degree phase shifted SIN and COS signals for a harmonic input signal provided by a diametrically magnetized source. Table 9. Hall Sensor Array Characteristics Symbol GArray dArray Parameter Array Gain Array Length Conditions Double output stage Min Typ 5.226 2 mm Max Units
Figure 8. Hall Sensor FE Arrangement
A mag N
S 2mm
Q0
H0 H1 H2
Q1
H3 H4
Q2
H5 H6
Q3
H7
Front End Double Output Stages
CH0 CH1
SIN COS
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Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
8.2 Automatic Gain Control (AGC)
As the magnetic input field varies non-linearly with the air gap between sensor and magnet, the gain is controlled to an optimum input signal for the SD ADC. The magnitude output is compared to a target register value. The most significant eight bits are used. If the actual magnitude differs from the target value, an UP/DOWN signal for the AGC counter signal is generated. For air gap detection functionality, two magnitude-change outputs are derived from the AGC counter UP/DOWN signals while the loop is controlling the amplitude back to the target amplitude. Magnitude Increasing (MagINCn) and Magnitude Decreasing (MagDECn) signals indicate air gap (SIN/COS amplitude) changes. Both signals are high for saturation of the AGC counter (running into upper / lower limit) and produce a Non-Valid-Range alarm. The output pins can be connected together in wired-OR configuration to produce a single NVRn bit. For faster power-up and response time, a successive approximation algorithm is implemented.
8.3 Temperature Sensor
The Temperature Sensor provides the junction temperature information over the serial interface. Table 10. Temperature Sensor Characteristics Parameter Absolute Error Trimmed Conversion Rate Temperature Range Readout Range Resolution Clock Frequency Conditions See IC User Interface on page 12 for continuous readout (1303 clock cycles between conversion) specified temperature range design limit for temperature range Temp [C] = output code [LSB] x 0.667 [C/LSB] 75[C] System clock (4 MHz) divided by 4 -30 -50 8 0.667 1 Min Typ Max 10 767 70 80 Units C sample/s C C bit C/LSB MHz
8.4 IC User Interface
The device is accessible via an I2C two-wire serial interface. The default address is A<6:0>1000000. A<5:1> can be defined by the OTP I2C Address. A0 can be selected by pulling up pin 11 (default internal pull down). CSn must be low during IC data transmission (not connected / internal pull down). Figure 9. IC Read Out by an C-Master
Type Identifier SDA 1
1
Address
Read D11 D10 D9 D8 D7 D6 D5 D4
9 1 9
A5 A4
A3
A2 A1 A0p R/
D3 D2 D1 D0
1
Mag Offset cordic Lin Incr Comp Over Alarm Decr Finish Flow
AGC7
SCL S
9
1
ACK Address by Slave
Data Byte 1
ACK Master
Data Byte 2
ACK Master
Data Byte 3
D11 - D0: Linear position Offset Compensation Finished: "high" indicates a data valid. CORDIC OverFlow: "high" indicates a DSP calculation overflow. Linearity Alarm: "high" indicates the ADC input range exceeds 625mV (=Filter OverFlow) MagIncr / MagDecr "high" OR connection indicates changing magnitude and non-valid input range (see also pin 2 and 3)
In addition to the position data, magnitude and temperature sensor information can be read out as described in Automatic Gain Control (AGC) on page 12 and Temperature Sensor on page 12.
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Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Figure 10. IC Additional Information - Magnitude and Temperature Sensor
SDA
Mag Incr Decr
AGC7AGC6AGC5AGC4AGC3AGC2AGC1AGC0
Mag7 Mag6Mag5 Mag4Mag3Mag2Mag1Mag0
TD9 TD8 TD7 TD6 TD5 TD4 TD3 TD2
9
SCL Data Byte 2
9
1
9
1
9
1
ACK Master
Data Byte 3
ACK Master
Data Byte 4
ACK Master
Data Byte 5
ACK Master
P
AGC7- AGC0: Automatic Gain Control data Mag7- Mag0: MSB magnitude value TD9 - TD2: MSB temperature data
The information is sequenced by the order of priority during operation. Hence temperature readout is not needed for every access and magnitude information is only important if the AGC is out of range. The IC readout can be stopped after every byte with the stop condition P. Timing constraints are according to I2C-Bus Specification V2.1 / 2000.
8.4.1
Sync Mode
This mode is used to synchronize the external electronics with the NSE-5310. In this mode two signals are provided at the pins DTEST_A and DTEST_B. Figure 11. Sync Mode
Data _ PhaseA DTEST 1 _ A DTEST 2 _ B
Data_PhaseB
Data_PhaseA
96 s
Every rising edge at DTEST1_A indicates that new data in the device is available. With this signal it is possible to trigger a C (interrupt) and start the serial interface readout.
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Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
8.5 Z-axis Range Indication ("Red/Yellow/Green" Indicator)
The NSE-5310 provides several options of detecting the magnet distance by indicating the strength of the magnetic field. Signal indicators MagINCn and MagDECn are available both as hardware pins (pins 2 and 3) and as status bits in the serial data stream (see Figure 9). Additionally the LIN status bit indicates the non-recommended "red" range. The digital status bits MagINC, MagDec, LIN and the hardware pins MagINCn, MagDECn have the following function: Table 11. Magnetic Field Strength Red-Yellow-Green Indicators Status Bits Mag INC 0 Mag DEC 0 Lin 0 MAG M11... M0 3F hex Mag INCn OFF Mag DECn OFF Hardware Pins Description No distance change Magnetic input field OK (GREEN range, ~10-40mT peak amplitude) Distance increase; this state is a dynamic state and only active while the magnet is moving away from the chip. Magnitude register may change but regulates back to 3F hex. Distance decrease; this state is a dynamic state and only active while the magnet is moving towards the chip. Magnitude register may change but regulates back to 3F hex. YELLOW range: magnetic field is ~3.4-4.5mT. The device may still be operated in this range, but with slightly reduced accuracy. RED range: magnetic field is <3.4mT (MAG <20) or >54.5mT (MAG >5F). It is still possible to operate the device in the red range, but not recommended.
0
1
0
3F hex
OFF
OFF
1
0
0
3F hex
OFF
OFF
1
1
0
20 hex - 5F hex <20 hex >5F hex
ON
OFF
1
1
1
ON
ON
8.6 Pulse Width Modulation (PWM) Output
The NSE-5310 also provides a pulse width modulated output (PWM), whose duty cycle is proportional to the relative linear position of the magnet within one pole pair (2.0 mm). This cycle repeats after every subsequent pole pair:
t on 4098 Position = ----------------------- - 1 ( t on + t off )
Where: Digital position = 0 - 4094 Exception: A linear position of 1999.5m = digital position 4095 will generate a pulse width of tON = 4097s and a pause tOFF = 1s The PWM frequency is internally trimmed to an accuracy of 5% (10% over full temperature range). This tolerance can be cancelled by measuring the complete duty cycle as shown above.
(EQ 1)
Operating Conditions: TAMB = -40 to +125C, VDD5V = 3.0~3.6V (3V operation) VDD5V = 4.5~5.5V (5V operation) unless otherwise noted. Table 12. PWM Output Timing Considerations Symbol fPWM PWMIN PWMAX Parameter PWM frequency Conditions Signal period = 4098s 5% at TAMB=25C = 4098s 10% at TAMB= -40 to +125C Position 0d = 0m Position 4095d = 1999.5m Min 232 220 0.9 3892 Typ 244 244 1 4097 Max 256 Hz 268 1.1 4301 s s Units
Minimum pulse width Maximum pulse width
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Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Figure 12. PWM Output Signal
Position
PWMIN
0 m (Pos 0)
1s PWMAX 1999.5 m (Pos 4095)
4098s
4097s 1/fPWM
8.7 Magnetic Strip Requirements
The NSE-5310 requires a magnetic strip with alternate poles (North-South) of pole length of 1 mm and pole pair length of 2 mm. A half pole is required at each end of the strip. The length of the strip determines the maximum measured stroke; it must be 3 mm greater than the stroke in 1 mm increments (1.5 mm on each end). A circular magnet may be used to achieve off-axis rotary encoding. Table 13. Magnetic Strip Requirements Parameter Pole length Pole pair length Magnetic strip length Magnetic strip area Magnetic field temp drift Value 1 mm 2 mm 1.2% Stroke + 3 mm 1 mm X 2 mm -0.2%/K max Accuracy of magnetic pole length determines accuracy of linear measurement The magnet strip must be in 1 mm increments. A 1/2 pole is required at each end. Size recommended for TSSOP package Recommended - for example Samarium Cobalt ReComa28 is 0.035%/K Note
8.7.1
Mounting the Magnet
Vertical Distance: As a rule of thumb, the gap between chip and magnet should be 1/2 of the pole length, that is Z=0.5mm for the 1.0mm pole length of the magnets. However, the gap also depends on the strength of the magnet. The NSE-5310 automatically adjusts for fluctuating magnet strength by using an automatic gain control (AGC). The vertical distance should be set such that the NSE-5310 is in the "green" range. See Z-axis Range Indication ("Red/Yellow/Green" Indicator) on page 14 for more details. Alignment of Multi-pole Magnet and IC: When aligning the magnet strip or ring to the NSE-5310, the centerline of the magnet strip should
be placed exactly over the Hall array. A lateral displacement in Y-direction (across the width of the magnet) is acceptable as long as it is within the active area of the magnet. The active area in width is the area in which the magnetic field strength across the width of the magnet is constant with reference to the centerline of the magnet.
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Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Lateral Stroke of Multi-pole Strip Magnets: The lateral movement range (stroke) is limited by the area at which all Hall sensors of the IC
are covered by the magnet in either direction. The Hall array on the NSE-5310 has a length of 2.0mm, hence the total stroke is: maximum lateral Stroke = Length of active area - length of Hall array (EQ 2) Note: Active area in length is defined as the area containing poles with the specified 1.0mm pole length. Shorter poles at either edge of the magnet must be excluded from the active area. Figure 13. Magnetic Strip Alignment
Note: Further examples including use in off-axis rotary applications are shown in the "Magnet Selection Guide", available for download at http://www.austriamicrosystems.com/eng/content/view/download/11922.
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Data Sheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
9 Package Drawings and Markings
Figure 14. 20-pin TSSOP Package
0.22990.100
0.77010.150
0.23410.100
Die C/L 3.2000.235 2.5760.235
Package Outline
DIE
623.5um 40um MagIncrn 2 19 VDD5V 18 VDD3V3 17 TestBus1 16 TestBus0 Die C/L 3.98mm
y 52 52 52 52 52 52 1206.7 1321.7 1657.75 1772.7 2161 17 - 21
3.04750.235
TSSOP20 (CSOIC20 Eng. Smp.)
TestBus3 20 1 NC VDD5V 19 2 MagIncrn 3 MagDecrn VDD3V3 18 4 DTest1_A TestBus0 17 5 DTest2_B TestBus1 16 PWM 15 6 TestCoil CSn 14 7 Mode_Index SCL / CLK 13 8 VSS SDA / DIO 12 9 PDIO I2C_A0 11 10 NC
MagDecrn 3 DTest1_A 4 DTest2_B 5
HE Array
TestCoil 6 Mode_Index 7 VSS 8 PDIO 9 2.57mm
15 14 13 12
PWM CSn CLK DIO
11 I2C_A0
Pad Name VDDD VDDA TB0 TB1 PWM CSn CLK DIO I2C_A0 PDIO VSS
Coordinates x 291.4 407.85 717.2 822.2 2877.2 3068.2 3259.2 3450.2 3641.2 3828 3526.75 y 2418 2418 2418 2418 2418 2418 2418 2418 2418 668.5 52
Pad Name VSS Mode_Index COIL DTEST2_B DTEST1_A MagDecrn MagIncrn TB2 TB3 VDDHall VDD5V
Coordinates x 3423.65 3235.45 3132.35 720.6 383 175.4 52 52 52 52 52
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Revision 1.0
NSE-5310
Data Sheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
The evaluation kit includes an NSE-5310 mounted in a TSSOP 20 package with flex cable, for easy handling during evaluation and system development. The TRK-1T02-E evaluation pack includes a TRK-1T02 along with a suitable linear magnetic strip, a MC-31MB interface card and New Scale PathwayTM software with intuitive user interface to facilitate evaluation. Figure 15. TRK-1T02 Package for Easy Handling During Evaluation
160 mm long FPC (flexible printed circuit) connector
VDD3V3
FPC_EDGE_0.5MM-6P
J1 1 2 3 4 5 6
SCL
SDA A0
FPC pad 1 2/5 3 4 6
Symbol SCL (CLK) VSS VDD3V3 SDA (DO) A0
Definition [Schmitt trigger] Serial interface CLK (up to 400 KHz) Ground Positive I/O supply voltage Data output via I2C serial interface Address (0 or 1) for use with two position sensors
U1 1 2 3 4 5 6 7 8 9 10 NC MagINCn MagDECn DTest1_A DTest2_B Coil Mode_Index VSS PDIO NC TestBus3 VDD5 VDD3V3 TestBus1 TestBus0 PWM CSn SCL / CLK SDA / DIO I2C_A0 20 19 18 17 16 15 14 13 12 11
SCL
VDD3V3
VSS
VDD3V3
SDA
SCL
A0
SDA A0
C1 0.1uF
C2 100pF
C3 100pF
C4 100pF
VSS
VSS
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Revision 1.0
18 - 21
NSE-5310
Data Sheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
Custom chip-on-board packaging can be provided for qualified OEMs. Minimum order quantities apply. Inquire for more detail. Figure 16. Custom Chip-On-Board Packaging (5.4 x 4.2 x 0.6 mm)
0.62 mm Centerline of sensor Array Centerline of IC 2 mm 0.5 mm Magnet centered on hall elements
4.2 mm
Custom wafer-level chip scale packaging can be provided for qualified OEMs. Minimum order quantities apply. Inquire for more detail. Figure 17. Custom Wafer-Level Chip Scale Packaging (as small as 3.9 x 2.5 x 0.6 mm)
0.62 mm Centerline of sensors Centerline of IC 2 mm 0.5 mm 1.13 mm Gap .26 +/-.2 mm
Magnet centered on hall elements
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Revision 1.0
19 - 21
NSE-5310
Data Sheet - O r d e r i n g I n f o r m a t i o n
10 Ordering Information
The devices are available as the standard products shown in Table 14. Table 14. Ordering Information Ordering Code TRK-1T02-E Evaluation Pack NSE-5310ASDF NSE-5310ASSU NSE-5310ASST Custom chip-on-board Description Includes TRK-1T02 position sensor, MC-31MB interface card, New Scale pathway software Encoder, Bare Die Die thickness 300m 25m Encoder, Bare Die Die thickness 300m 25m Encoder, Bare Die Die thickness 300m 25m Inquire for details Dies On Foil Tube Tape & Reel 2.57 mm x 3.98 mm TSSOP-20 TSSOP-20 Delivery Form Package
Note: All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect For further information and requests, please contact us mailto:sales@austriamicrosystems.com or find your local distributor at http://www.austriamicrosystems.com/distributor
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Revision 1.0
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NSE-5310
Data Sheet - C o p y r i g h t s
Copyrights
Copyright (c) 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered (R). All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.
Contact Information
Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact
Contact Information
New Scale Technologies, Inc. 121 Victor Heights Parkway Victor, NY 14564 Tel: +1 585 924 4450 Fax: +1 585 924 4468 sales@newscaletech.com www.newscaletech.com
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