Hardware
Documentation
D at a S h e e t
®
HAR 3715, HAR 372x,
HAR 373x
Robust Dual-Die Programmable
2D Position Sensor Family
with Arbitrary Output Function
Edition Oct. 25, 2019
DSH000175_003EN
DATA SHEET
HAR 3715, HAR 372x, HAR 373x
Copyright, Warranty, and Limitation of Liability
The information and data contained in this document are believed to be accurate and reliable. The software and proprietary information contained therein may be protected by
copyright, patent, trademark and/or other intellectual property rights of TDK-Micronas. All
rights not expressly granted remain reserved by TDK-Micronas.
TDK-Micronas assumes no liability for errors and gives no warranty representation or
guarantee regarding the suitability of its products for any particular purpose due to
these specifications.
By this publication, TDK-Micronas does not assume responsibility for patent infringements
or other rights of third parties which may result from its use. Commercial conditions, product availability and delivery are exclusively subject to the respective order confirmation.
Any information and data which may be provided in the document can and do vary in
different applications, and actual performance may vary over time.
All operating parameters must be validated for each customer application by customers’
technical experts. Any mention of target applications for our products is made without a
claim for fit for purpose as this has to be checked at system level.
Any new issue of this document invalidates previous issues. TDK-Micronas reserves
the right to review this document and to make changes to the document’s content at any
time without obligation to notify any person or entity of such revision or changes. For
further advice please contact us directly.
Do not use our products in life-supporting systems, military, aviation and aerospace
applications! Unless explicitly agreed to otherwise in writing between the parties,
TDK-Micronas’ products are not designed, intended or authorized for use as components in systems intended for surgical implants into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the
product could create a situation where personal injury or death could occur.
No part of this publication may be reproduced, photocopied, stored on a retrieval system or transmitted without the express written consent of TDK-Micronas.
TDK-Micronas Trademarks
HAL, 3D HAL, HAR
Third-Party Trademarks
All other brand and product names or company names may be trademarks of their
respective companies.
License Note
HAR 3715, HAR 372x, and HAR 373x use licenses of Fraunhofer Institute for Integrated
Circuits IIS
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DATA SHEET
Contents
Page
Section
Title
4
5
6
1.
1.1.
1.2.
Introduction
Major Applications
Features
7
7
2.
2.1.
Ordering Information
Device-Specific Ordering Code
9
9
10
10
10
11
13
19
21
22
24
3.
3.1.
3.2.
3.2.1.
3.2.2.
3.2.2.1.
3.2.2.2.
3.3.
3.4.
3.5.
3.6.
Functional Description
General Function
Signal Path and Register Definition
Signal Path
Register Definition
RAM Registers
EEPROM Registers
Output Linearization
NVRAM Register
On-board Diagnostic Features
SENT Output
26
26
27
27
27
27
28
29
30
31
37
4.
4.1.
4.2.
4.3.
4.4.
4.5.
4.6.
4.7.
4.8.
4.9.
4.10.
Specifications
Outline Dimensions
Soldering, Welding, Assembly
Storage and Shelf Life
Size of Sensitive Area
Definition of Magnetic-Field Vectors
Pin Connections and Short Description
Absolute Maximum Ratings
Recommended Operating Conditions
Characteristics
Magnetic Characteristics
39
39
39
39
40
41
41
5.
5.1.
5.2.
5.3.
5.4.
5.5.
5.6.
Application Notes
Ambient Temperature
EMC and ESD
Application Circuit for HAR 3715 and HAR 372x
Application Circuit for HAR 373x
Measurement of a PWM Output Signal of HAR 373x
Recommended Pad Size SOIC8 Package
42
42
43
44
6.
6.1.
6.2.
6.3.
Programming of the Sensor
Programming Interface
Programming Environment and Tools
Programming Information
45
7.
Document History
TDK-Micronas GmbH
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HAR 3715, HAR 372x, HAR 373x
DATA SHEET
Robust Dual-Die Programmable 2D Position Sensor Family
with Arbitrary Output Function
Release Note: Revision bars indicate significant changes to the previous edition.
1. Introduction
The HAR 37xy is the full redundant (dual-die) version of the well known HAL 37xy family using the TDK-Micronas’ proprietary 3D HAL technology. It provides full redundancy
due to two independent dies stacked in a single package each bonded on a separate
side of the package. The stacked-die architecture ensures that both dies occupy the
same magnetic-field position, thus generating synchronous measurement outputs.
This family has several members. HAR 372x provides linear, ratiometric analog output
signals with integrated wire-break detection working with pull-up or pull-down resistors.
Compared to the HAR 372x the HAR 3715 is splitting the 360° measurement range
either into four repetitive 90° (MOD 90°) or three 120° (MOD 120°) segments. HAR 373x
features digital output formats like PWM and SENT (according SAE J2716 release
2010). The digital output format is customer programmable. The PWM outputs are configurable with frequencies between 0.2 kHz and 2 kHz with up to 12-bit resolution.
Conventional planar Hall technology is only sensitive to the magnetic field orthogonal to
the chip surface. In addition to the orthogonal magnetic field, HAR 37xy is also sensitive
to magnetic fields applied in parallel to the chip surface. This is possible by integrating
vertical Hall plates into the standard CMOS process.
The sensor cell can measure three magnetic-field components BX, BY, and BZ. This
enables a new set of applications for position detection, like wide distance, angle or
through-shaft angular measurements. The table below describes the different family
members.
Type
Output Format
Detectable Field Component
HAR 3715
Analog/Modulo
BX and BY
HAR 3725
Analog
BX and BY
HAR 3726
Analog
BY and BZ
HAR 3727
Analog
BX and BZ
HAR 3735
PWM & SENT
BX and BY
HAR 3736
PWM & SENT
BY and BZ
HAR 3737
PWM & SENT
BX and BZ
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On-chip signal processing calculates the angle out of two of the magnetic-field components and converts this value to an output signal. Due to the measurement method, the
sensor exhibits excellent drift performance over the specified temperature range resulting in a new class of accuracy for angular or linear measurements.
Additionally to the built-in signal processing, the sensor features an arbitrary programmable characteristic for linearization of the output signal (with up to 33 setpoints).
Major characteristics like gain and temperature dependent offset of X/Y- and Z-channel,
reference position, phase shift between X/Y- and Z-signal, hysteresis, low-pass filter
frequency, output slope, and offset and clamping levels can be adjusted to the magnetic
circuitry by programming the non-volatile memory.
The sensor contains advanced on-board diagnostic features that enhance fail-safe
detection. In addition to standard checks, such as overvoltage and undervoltage detection and wire break, internal blocks such as ROM and signal path are monitored during
normal operation. For devices with a selected PWM output, the error modes are indicated by a change of PWM frequency and duty-cycle. For SENT output a dedicated
error code will be transmitted.
The devices are designed for automotive and industrial applications and operate with
junction temperature from 40 °C up to 170 °C.
The sensors are available in a very small 8-pin SOIC8 package. The package outlines and
the X-Y position of the sensitive areas are identical to the single-die version HAL 37xy.
1.1. Major Applications
Thanks to its redundancy capability, HAR 37xy can address safety-critical applications
according to ISO 26262 rules. Sensor’s versatile programming characteristics and its
high accuracy, make the HAR 37xy a potential solution for the following applications
examples:
– Linear movement measurement,
• Dual-Clutch transmission
• Engine stroke sensor
• Clutch pedal position
• Cylinder and valve position sensing
– Rotary position measurement, like
• Gear selector
• Throttle valve position, etc.
• Chassis position sensors (ride-height control) with HAR 3715
– Joystick
– Non-contact potentiometer
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1.2. Features
Each die provides
– Angular and position measurement extremely robust against temperature and stress
influence
– 12-bit ratiometric linear analog output for HAR 372x
– Modulo 90°/120° for HAR 3715
– 0.2 kHz to 2 kHz PWM (up to 12 bits)
or 12-bit SENT output for HAR 373x
– Programmable arbitrary output characteristic with up to 33 setpoints
– 8 kHz sampling frequency
– Operates from 4.5 V up to 5.5 V supply voltage
– Operates from 40 °C up to 170 °C junction temperature
– Programming via the sensor’s output pin
– Programmable characteristics in a non-volatile memory (EEPROM) with redundancy
and lock function
– Programmable first-order low-pass filter
– Programmable hysteresis on X/Y or Z-channel
– Programmable output gain and offset
– X/Y- and Z-channel gain of signal path programmable
– Second-order temperature dependent offset of signal path programmable for X/Y- or
Z-channel
– Phase shift between X/Y- and Z-channel programmable
– Programmable offset before angle calculation block
– Programmable output clamping for error band definition
– Programmable reference position
– Programmable magnetic detection range
– 32-bit identification number for customer
– 32-bit identification number with TDK-Micronas production information (like X,Y position on production wafer)
– On-board diagnostics of different functional blocks of the sensor
– Short-circuit protected push-pull output
– Over- and reverse voltage protection at VSUP
– Under- and overvoltage detection of VSUP
– Wire-break detection with pull-up or pull-down resistor
– EMC and ESD robust design
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2. Ordering Information
A Micronas device is available in a variety of delivery forms. They are distinguished by a
specific ordering code:
XXX NNNN PA-T-C-P-Q-SP
Further Code Elements
Temperature Range
Package
Product Type
Product Group
Fig. 2–1: Ordering Code Principle
For a detailed information, please refer to the brochure: “Sensors and Controllers:
Ordering Codes, Packaging, Handling”.
2.1. Device-Specific Ordering Code
The HAR 37xy is available in the following package and temperature variant.
Table 2–1: Available package
Package Code (PA)
Package Type
DJ
SOIC8-1
Table 2–2: Available temperature ranges
Temperature Code (T)
Temperature Range
A
TJ = 40 °C to 170 °C
The relationship between ambient temperature (TA) and junction temperature (TJ) is
explained in Section 5.1. on page 39.
For available variants for Configuration (C), Packaging (P), Quantity (Q), and Special
Procedure (SP) please contact TDK-Micronas.
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Table 2–3: Available ordering codes and corresponding package marking
Available Ordering Codes
Package Marking
HAR3715DJ-A-[C-P-Q-SP]
3715A
HAR3725DJ-A-[C-P-Q-SP]
3725A
HAR3726DJ-A-[C-P-Q-SP]
3726A
HAR3727DJ-A-[C-P-Q-SP]
3727A
HAR3735DJ-A-[C-P-Q-SP]
3735A
HAR3736DJ-A-[C-P-Q-SP]
3736A
HAR3737DJ-A-[C-P-Q-SP]
3737A
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3. Functional Description
3.1. General Function
HAR 3715, HAR 372x and HAR 373x are 2D position sensors based on TDK-Micronas’
3D HAL technology. They are dual-die integrated circuits with full redundant output signals. Each sensor die includes two vertical and one horizontal Hall plate with spinning
current offset compensation for the detection of X, Y or Z magnetic-field components, a
signal processor for calculation and signal conditioning of two magnetic-field components, protection devices, and a ratiometric linear analog, PWM or SENT output.
The spinning current offset compensation minimizes the errors due to supply voltage
and temperature variations as well as external package stress.
The signal path of each die of HAR 37xy consist of two channels (CH1 and CH2).
Depending on the product variant two out of the three magnetic-field components are
connected to Channel 1 and Channel 2.
The sensors can be used for angle measurements in a range between 0° and 360° (end
of shaft and through shaft setup) as well as for robust position detection (linear movement or position). The in-system calibration can be utilized by the system designer to
optimize performance for a specific system. The calibration information is stored in an
on-chip EEPROM.
The HAR 37xy is programmable by modulation of the output voltage. No additional programming pin is needed.
VSUP1
VSUP2
Internally
Stabilized
Supply and
Protection
Devices
Temperature
Dependent
Bias
Open-Circuit,
Overvoltage,
Undervoltage
Detection
Oscillator
Protection
Devices
TEST1
TEST2
DSP
X/Y/Z
Hall Plate
33 Setpoints
Linearization
A/D
Analog
Output
OUT1
D/A
Converter
A/D
PWM/SENT
Module
OUT2
X/Y/Z
Hall Plate
EEPROM Memory
Temperature
Sensor
A/D
Converter
GND1
Digital
Output
Lock Control
GND2
Fig. 3–1: HAR 37xy block diagram
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3.2. Signal Path and Register Definition
3.2.1. Signal Path
fsample
CUST_OFFSET
CH1/CH2_GAIN
CH1_COMP
GAIN_CH1 X
Channel 1 (CH1)
CUST_OFFSETCH1
Adjusted
Values
LP
D
1
st
order
LP
+
X
+
X CUST_OFFSETCH2
BCH2 A
LP
D
1st order
LP
Adjusted
Values
+
X
Hysteresis
BCH1 A
ANGLE_IN_CH2
ANGLE_IN_CH1
X
Angle
calculation
ANGLE_AMP
LP_FILTER
+
Channel 2 (CH2)
MAG_LOW
MAG_HIGH
OUT_ZERO
GAIN_CH2
Tw (temp.)
TADC
A
D
CH2_COMP
ADJ
TADJ
MOD
90°/120°
D/A
scale
CI
ANGLE_OUT
Linearization
33 Setpoints
CP
D
A
VOUT
ANGLE_OUT
DAC
MOD_REG
(HAR 3715 only)
OUT_OFFSET SP0 to SP32 CLAMP-HIGH
OUT_GAIN
CLAMP-LOW
PRE_OFFSET
SENT
SENTOUT
PWM
PWMOUT
PWM FREQUENCY
d
Fig. 3–2: Signal path of HAR 37xy (equal for both dies)
3.2.2. Register Definition
The DSP part of this sensor performs the signal conditioning. The parameters for the
DSP are stored in the EEPROM/NVRAM register. Details of the signal path are shown
in Fig. 3.2.
Terminology:
GAIN:
name of the register or register value
Gain:
name of the parameter
Blue color: register names
The sensor signal path contains two kinds of registers. Registers that are readout only
(RAM) and programmable registers EEPROM/NVRAM. The RAM registers contain
measurement data at certain steps of the signal path and the EEPROM/NVRAM registers have influence on the sensors signal processing.
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3.2.2.1. RAM Registers
TADJ
The TADJ register contains the digital value of the sensor junction temperature. It has a
length of 16 bits and is binary coded. From the 16 bits only the range between 0 and
32767 is used for the temperature information. Typically the temperature sensor is calibrated in the way that at 40°C the register value is 100 LSB and at 160°C it is
12000 LSB.
CH1_COMP and CH2_COMP
CH1_COMP and CH2_COMP register contain the temperature compensated magneticfield information of channel 1 and channel 2. Both registers have a length of 16 bits
each and are two’s-complement coded. Therefore, the register values can vary
between 32768 and 32767.
ANGLE_IN_CH1 and ANGLE_IN_CH2
ANGLE_IN_CH1 and ANGLE_IN_CH2 register contain the customer compensated
magnetic-field information of channel 1 and channel 2 used for the angle calculation.
These registers include already customer phase-shift, gain and offset correction as well
as an hysteresis. Both registers have a length of 16 bits each and are two’s-complement coded. Therefore, the register values can vary between 32768 and 32767.
ANGLE_OUT
The ANGLE_OUT register contains the digital value of the position calculated by the
angle calculation algorithm. It has a length of 16 bits and is binary. From the 16 bits only
the range between 0 and 32767 is used for the position information. Position can either
be an angular position (angle) or a virtual angle calculated out of two magnetic-field
directions in case of linear position measurements.
DAC
The DAC register contains the digital equivalent of the output voltage, PWM output
duty-cycle or the SENT data. It has a length of 16 bits and is binary. From the 16 bits
only the range between 0 and 32767 is used for the position information. Position can
either be an angular position (angle) or a virtual angle calculated out of two magneticfield directions in case of linear position measurements.
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ANGLE_AMP
The ANGLE_AMP register contains the digital value of the magnetic-field amplitude calculated by the angle calculation algorithm. From mathematical point of view the amplitude
can be calculated out of the signals in channel 1 and channel 2 (X-/Y-/Z-components).
Example:
Amplitude =
2
CH1 + CH2
2
The angle calculation algorithm adds a factor of roughly 1.6 to the equation for the magnetic amplitude. So the equation for the amplitude is defined as follows:
2
ANGLE_AMP 1.6 CH1 + CH2
2
DIAGNOSIS
The DIAGNOSIS register identifies certain failures detected by the sensor. HAR 37xy
performs self-tests during power-up of the sensor and also during normal operation.
The result of these self tests is stored in the DIAGNOSIS register. DIAGNOSIS register
is a 16-bit register.
Bit no. Function
Description
15:10
None
Reserved
9
DAC Output High
Clamping
This bit is set to 1 in case that the high clamping value of the DAC is
reached.
8
DAC Output Low
Clamping
This bit is set to 1 in case that the low clamping value of the DAC is
reached.
7
Channel 1 Clipping
6
Channel 2 Clipping
These bits are set to 1 in case that the A/D converter in channel 1 and/or 2
detects an under- or overflow
5
DSP Self Test1)
The DSP is doing the internal signal processing like angle calculation, temperature compensation, etc.
This bit is set to 1 in case that the DSP self test fails. (Continuously running)
Test1)
4
EEPROM Self
3
ROM Check
This bit is set to 1 in case that ROM parity check fails. (Continuously running)
2
None
Reserved
1
MAGHI
This bit is set to 1 in case that the magnetic field is exceeding the MAG-HI
register value (magnetic field too high)
0
MAGLO
This bit is set to 1 in case that the magnetic field is below the MAG-LOW
register value (magnetic field too low)
This bit is set to 1 in case that the EEPROM self test fails.
(Performed during power-up or continuously running)
1) Details on the sensor self tests can be found in Section 3.5. on page 21.
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PROG_DIAGNOSIS
The PROG_DIAGNOSIS register allows the customer to identify errors occurring during
programming and writing of the EEPROM or NVRAM memory. The customer must check
the first and second acknowledge. To enable debugging of the production line it is recommended to read back the PROG_DIAGNOSIS register in case of a missing second
acknowledge. Please check the Programming Guide for HAR 37xy for further details.
The PROG_DIAGNOSIS register is a 16-bit register. The following table shows the different bits indicating certain error possibilities.
Bit no. Function
Description
15:11
None
Reserved
10
Charge Pump Error
This bit is set to 1 in case that the internal programming voltage was too low
9
Voltage Error during
Program/Erase
This bit is set to 1 in case that the internal supply voltage was too low during
program or erase
8
NVRAM Error
This bit is set to 1 in case that the programming of the NVRAM failed
5:0
Programming
These bits are used for programming the memory
3.2.2.2. EEPROM Registers
Note
For production and qualification tests it is mandatory to set the LOCK bit
after final adjustment and programming.
Note
Please refer to the “HAL 37xy, HAR 372x, HAR 373x User Manual” for further details on register settings/calculation and programming of the device.
TDK-Micronas ID’s
The MIC_ID1 and MIC_ID2 registers are both 16-bit organized. They are read only and
contain TDK-Micronas production information, like X/Y position on the wafer, wafer
number, etc.
Customer ID’s
The CUST_ID1 and CUST_ID2 registers are both 16-bit organized. These two registers
can be used to store customer production information, like serial number, project
information, etc.
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CH1/CH2_GAIN
CH1/CH2_GAIN can be used to compensate a phase shift between channel 1 and
channel 2. The register has a length of 16 bits. It is possible to make a phase-shift correction of ±75°. The step size and therefore the smallest possible correction is 0.002°.
The register is two’s-complement coded and ranges from 32768 to 32767. The register value is sin function based.
Neutral value for this register is zero (no phase-shift correction).
Note
In case the phase-shift correction is used, then it is necessary to adapt the
settings of GAIN_CH2 too. For details see definition of GAIN_CH2.
GAIN_CH1 and GAIN_CH2
GAIN_CH1 and GAIN_CH2 can be used to compensate amplitude mismatches
between channel 1 and channel 2. TDK-Micronas delivers pre calibrated sensors with
compensated gain mismatch between channel 1 and channel 2. Nevertheless it is possible that due to the magnetic circuit a mismatch between channel 1 and channel 2 gain
occurs. This can be compensated with GAIN_CH1 and GAIN_CH2.
Both registers have a length of 16 bits and are two’s-complement coded. Therefore,
they can have values between 32768 and 32767 (2 to 2). For neutral settings both
register values have to be set to 1 (register value 16384).
In case that the phase-shift correction is used it is necessary to change also the gain of
channel 2 (see also CH1/CH2_GAIN). If phase-shift correction is used the corresponding register has to be set to
16384
GAIN_CH2 = ---------------------------------------cos phase shift
Note
In case GAIN_CH1 or GAIN_CH2 exceed the range of 2 to 2 (32768 to
32767), then it is possible to reduce the gain of the opposite channel for
compensation.
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CUST_OFFSET
CUST_OFFSET can be used to compensate an offset in channel 1 and channel 2.
TDK-Micronas delivers pre calibrated sensors. Nevertheless it is possible that due to
the magnetic circuit an offset in channel 1 and channel 2 occurs. This can be compensated with CUST_OFFSET.
The customer offset can also have a temperature coefficient to follow the temperature
coefficient of a magnet. The customer offset consists of a polynomial of second-order
represented by the three registers CUST_OFFSET1...3.
The customer offset can be added to channel 1 and/or channel 2 by the selection coefficients CUST_OFFSETCH1 and CUST_OFFSETCH2. Additionally these two registers
can be used to scale the temperature dependent offset between 0% and 100%
All five registers have a length of 16 bits and are two’s-complement coded. Therefore,
they can have values between 32768 and 32767.
HYSTERESIS
HYSTERESIS defines the number of digital codes used as an hysteresis on channel 1
and channel 2 before the angle calculation. The purpose of this register is to avoid
angle variation on the ANGLE_OUT register and finally on the output signal due to the
noise on the ANGLE_IN_CH1 and ANGLE_IN_CH2 signals.
The register has a length of 16 bits and is two’s complement number.
It is possible to program a hysteresis between 1 LSB and 16383 LSB. The register
value itself must be stored as a negative value.
The hysteresis function is deactivated by setting the register value to zero.
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OUT_ZERO
OUT_Zero defines the reference position for the angle output. It can be set to any value
of the output range. It is the starting point/reference for the 33 setpoints. OUT_ZERO
has a register length of 16 bits and it is two’s-complement coded.
Note
Before reading ANGLE_OUT it is necessary to set OUT_ZERO to 0.
360°
270°
90°
0°
180°
Fig. 3–3: Example definition of zero degree point
Secondly this angle can be used to shift the PI discontinuity point of the angle calculation to the maximum distance from the required angular range in order to avoid the
360°-wrapping of the output due to noise.
PRE_OFFSET
The PRE_OFFSET register allows to shift the angular range to avoid an overflow of the
internal 16-bit calculation/signal path.
The PRE_OFFSET register has a length of 16 bits and is two’s-complement coded.
OUT_GAIN
OUT_GAIN defines the gain of the output signal. The register has a length of 16 bits
and is two’s-complement coded. OUT_GAIN = 1 is neutral setting and leads to a
change of the output signal from 0% to 100% for an angle change from 0° to 360° (if
OUT_OFFSET is set to 0).
OUT_GAIN can be changed between 64 and 64.
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OUT_OFFSET
OUT_OFFSET defines the offset of the output signal. The register has a length of
16 bits and is two’s complement coded. OUT_OFFSET = 0 is neutral setting and leads
to a change of the output signal from 0% to 200% of full scale for an angle change from
0° to 360° (If OUT_GAIN is set to 1).
OUT_Offset can be changed between 200% and 200% of full scale. OUT_OFFSET =
0 leads to a voltage offset of 0% of full scale and OUT_OFFSET = 32768 leads to a offset of 200% of VSUP.
Clamping Levels (CLAMP-LOW & CLAMP-HIGH)
The clamping levels CLAMP_LOW and CLAMP_HIGH define the maximum and minimum output voltage of the analog output. The clamping levels can be used to define the
diagnosis band for the sensor output. Both registers have a length of 16 bits and are
two’s-complemented coded. Both clamping levels can have values between 0% and
100% of full scale.
Magnetic Range Check
The magnetic range check uses the magnitude output and compares it with an upper
and lower limit threshold defined by the registers MAG-LOW and MAG-HIGH. If either
low or high limit is exceeded then the sensor will indicate it with an overflow on the sensors output (output high clamping).
MAG-LOW
MAG-LOW defines the low level for the magnetic-field range check function. This register has a length of 16 bits and is two’s complement number.
MAG-HIGH
MAG-HIGH defines the high level for the magnetic-field range check function. This register has a length of 16 bits and is two’s complement number.
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Low-Pass Filter
With the LP_Filter register it is possible to select different 3dB frequencies for
HAR 37xy. The low-pass filter is a first-order digital filter and the register is 16-bit organized. Various typical filter frequencies between 4 kHz (no filter) and 10 Hz are available.
35000
30000
25000
LP_FILTER [LSB]
20000
15000
10000
5000
0
0
500
1000
1500
2000
2500
3000
3500
4000
3 dB frequency [Hz]
Fig. 3–4: 3dB filter frequency vs. LP_FILTER codes
Modulo Select
The MODULO_Select register is only available in HAR 3715. With this register, the customer can switch between Modulo 90° and 120° output.
HAR 3715 is splitting the 360° measurement range either into four repetitive 90°
(MOD 90°) or three 120° (MOD 120°) segments.
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DATA SHEET
3.3. Output Linearization
In certain applications (e.g. through shaft applications or position measurements) it is
required to linearize the output characteristic. The resulting output characteristic “value
vs. angle/position” is not a linear curve as in the ideal case. But it can be linearized by
applying an inverse nonlinear compensation curve.
4
Output Signal [counts]
4
x 10
3
2
1
0
-1
-2
Linearized
Distorted
Compensation
-3
-4
-4
-3
-2
-1
0
1
Input signal [counts]
2
3
4
4
x 10
Fig. 3–5: Example for output linearization
For this purpose the compensation curve will be divided into 33 segments with equal
distance. Each segment is defined by two setpoints, which are stored in EEPROM.
Within the interval, the output is calculated by linear interpolation according to the position within the interval.
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output
DATA SHEET
xnl: non linear distorted input value
yl: linearized value
e: remaining error
ysn+1
e
yl
ysn
xsn xnl
xsn+1
input
Fig. 3–6: Linearization - detail
The constraint of the linearization is that the input characteristic has to be a monotonic
function. In addition, it is recommended that the input does not have a saddle point or
inflection point, i.e. regions where the input is nearly constant. This would require a high
density of set points.
To do a linearization the following steps are necessary:
– Measure output characteristics over full range
– Find the inverse (point-wise mirroring the graph on the bisectrix)
– Do a spline fit on the inverse
– Insert digital value of set point position into spline fit function for each set point (0, 1024,
2048 ... 32768)
– Resulting values can be directly entered into the EEPROM
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DATA SHEET
3.4. NVRAM Register
Customer Setup
The CUST_SETUP register is a 16-bit register that enables the customer to activate
various functions of the sensor like diagnosis modes, functionality mode, customer lock,
communication protocol speed, etc.
Table 3–1: Customer Setup Register
Bit no. Function
Description
15
None
Reserved
14
EEPROM Self-Test
EEPROM Self-Test Mode (latched)
0: Running during Power-Up
1: Continuously
13
Communication speed
BiPhase-M protocol speed
0: typ. 1 ms
1: typ. 0.25 ms
12
DIGMOD
Output format for HAR 373x devices
0: PWM output
1: SENT output
11:10
PWMFREQ
Defines the frequency of the PWM output for HAR 373x devices only
0: 1 kHz
1: 500 Hz
2: 200 Hz
3: 2 kHz (11 bits)
9:8
Output Short Detection
0: Disabled
1: High & low side over current detect. Error Band = High: OUT = VSUP
Error Band = Low: OUT = GND
2: High & low side over current detect. Error Band = High: OUT = GND
Error Band = Low: OUT = VSUP
3: Low side over current detection
OUT = Tristate in error case
7
Error Band
Error band selection for locked devices (Customer Lock bit set).
0: High error band (VSUP)
1: Low error band (GND)
The sensor will always go to high error band as long as it is not
locked (Customer Lock bit not set).
6
Burn-In Mode
0: Disabled
1: Enabled
5
Functionality Mode
0: Extended
1: Normal
(see Section 4.9. on page 31)
4
Communication Mode
(POUT)
Communication via output pin
0: Disabled
1: Enabled
3
Overvoltage Detection
0: Overvoltage detection active
1: Overvoltage detection disabled
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DATA SHEET
Table 3–1: Customer Setup Register, continued
Bit no. Function
Description
2
Latching of diagnosis bits
Diagnosis Latch
0: No latching
1: Latched till next POR (Power-On Reset)
1
Diagnosis
0: Diagnosis errors force output to error band
1: Diagnosis errors do not force output to error band
0
Customer Lock
Bit must be set to 1 to lock the sensor memory
The Output Short Detection feature is implemented to detect a short circuit between two
sensor outputs. The customer can define how the sensor should signalize a detected short
circuit (see table above). The time interval in which the sensor is checking for an output
short and the detectable short circuit current are defined in Section 4.9. on page 31.
This feature should only be used in case that two sensors are used in one module to
detect a short between their outputs. In case that the Output Short Detection is not
active both sensors will try to drive their output voltage and the resulting voltage will be
within the valid signal band.
Note
The Output Short Detection feature is only active after setting the Customer
Lock bit and a power-on reset.
3.5. On-board Diagnostic Features
The HAR 37xy features two groups of diagnostic functions. The first group contains basic
functions that are always active. The second group can be activated by the customer and
contains supervision and self-tests related to the signal path and sensor memory.
Diagnostic features that are always active:
–
–
–
–
Wire break detection for supply and ground line
Undervoltage detection
Thermal supervision of output stage (overcurrent, short circuit, etc.)
EEPROM self-test at power-on
Diagnostic features that can be activated by customer:
–
–
–
–
–
–
–
continuous EEPROM self-test
ROM parity check
Output signal clamping
A/D converter clipping
Continuous DSP self-test
Magnetic range detection
Overvoltage detection
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DATA SHEET
In case of HAR 3715 and HAR 372x, the sensor indicates a fault immediately by switching the output signal to the selected error band in case that the diagnostic mode is activated by the customer. The customer can select if the output goes to the upper or lower
error band by setting bit number 7 in the CUST_SETUP register (Table on page 21).
An output short drives the output to VSUP, GND or tristate depending of the customer
settings as described in Table 3–1 on page 21. Further details can be found in
Section 4.9. on page 31.
The sensor switches the output to tristate if an over temperature is detected by the thermal supervision. The sensor switches the output to ground in case of a VSUP wire break
and to VSUP in case of a GND wire break.
HAR 373x indicates a failure by changing the PWM frequency. The different errors are
then coded in different duty-cycles.
Table 3–2: Failure indication for HAR 373x
Failure Mode
Frequency
Duty-Cycle
EEEPROM, ROM and DSP self-test
50%
95%
Magnetic field too low
50%
62.5%
Magnetic field too high
50%
55%
Overvoltage
50%
75%
Undervoltage
No PWM
n.a.
A/D converter clipping
50%
70%
In case of undervoltage, the PWM signal will be constantly 'high' or 'low' depending on
the setting of bit number 7 in the CUST_SETUP register. Default setting is 'high' level.
Note
In case of an error the sensor changes the selected PWM frequency.
Example: During normal operation the PWM frequency is 1 kHz, in case of
an error 500 Hz.
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DATA SHEET
HAR 3715, HAR 372x, HAR 373x
3.6. SENT Output
The implementation of the SENT (Single Edge Nibble Transmission) interface of
HAR 373x is according SAE J2716 release 2010-01.
Fig. 3–7 shows the general SENT protocol format. Every transmission starts with a low
pulse. The signal is transmitted by the sensor as a series of pulses and data measured
as falling to falling edge times.
The SENT telegram consists of a synchronization / calibration period, a status & communication nibble, three data nibbles, and a CRC nibble and a pause period. See
Section 4.9. on page 31 for the timing parameters of a telegram.
All timing values in a SENT protocol are referenced to the clock tick time ttick.
After reset the output is recessive high. The transmission starts with a low pulse of the
synchronization phase (Fig. 3–7). Every low pulse has the same length specified by the
parameter tnlow. The synchronization period has always the same length of clock
cycles. The clock variation is included in the parameter tsync. The following status and
data nibbles always start with a low pulse with tnlow. The nibble high time of the status
tstat, the data td3,2,1 and the CRC tcrc depends on the transmitted value. Therefore, the
message time of a SENT message depends on the tick time and the value which is
transmitted by the message.
In order to synchronize the SENT messages to the measurement sampling rate an
additional pause period is added, which is transmitted after the checksum nibble.
The time to transmit one message is calculated by:
tmessage = tsync + tstat + td3 + td2 + td1 + tcrc
The checksum nibble is a 4-bit CRC of the data nibbles only. The status & communication
nibble is not included in the CRC calculation. The CRC is calculated using polynomial
x4 + x3 + x2 + 1 with seed value of 5. See SAE J2716 for further CRC implementation
details.
As recommended by the SAE J2716 an additional zero nibble in addition to the 3 data
nibbles for the CRC calculation has been implemented. This is a safety measure
against common errors in the last data nibble and the checksum.
In HAR 373x the transmitted data nibbles are generated based on the DAC register value.
Special data codes have been implemented for error indication via the SENT interface.
The angular or linear position information is coded in the signal range from 2 to 4087 LSB
in the 12-bit range. Table 3–3 gives an overview on the data nibble content.
HAR 373x is not using the status nibble for additional information transmission.
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DATA SHEET
Table 3–3: Data Nibble Content SENT
12-bit value
Definition
4092 to 4095
Reserved
4091
Device Error: Device is failing in one of the self tests (EEPROM, ROM, DSP, Overvoltage)
4090
Signal Path Error: MAG-HIGH or -LOW are exceeded, adder overflow or clipping of channel
1 or 2
4089
Reserved
4088
Clamp-High: Upper signal range violation
2 to 4087
Angular or Position information
1
Clamp-Low: Lower signal range violation
0
During Initialization - Power Up
The SENT protocol starts after the initialization time of the sensor to ensure valid data
after power-up.
tnlow tnlow
tsync
PAUSE
(previous
telegram)
calibr. / synchron.
tnibble
tnibble
status
D[11:8]
tnibble
tnibble
D[7:4]
D[3:0]
tnibble
CRC
tnibble
PAUSE
tmessage
Fig. 3–7: SENT protocol format with 3 data nibbles and pause period
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DATA SHEET
4. Specifications
4.1. Outline Dimensions
4.9 B0.1
Product
A
D
3
1
2
PIN 1 INDEX
0
X2
0
Y1
0
Y2
0
D
0.3
A1
0.65
A2
0.24
B ( 20 : 1 )
Y2
6 B0.2
3.9 B0.1
Y1
4
HAR371x/HAR 372x/HAR 373x
X1
X2
X1
D
L
center of
sensitive area
6
8
7
0.25
5
0.42
B
gauge plane
L
0,25O
C
A-B
0.6 B0.18
D
1.27
0.38x45°
0.22 B0.05
Sn plated
A1
A2
Y2
8.5° B2°
4° B4°
0.175 B0.075
1.42 B0.1
0.65 B0.11
Y1
8.5° B2°
F
0
2.5
0.1
B
C
seating plane
seating plane
C
5 mm
scale
TOP VIEW
All dimensions are in mm.
Physical dimensions do not include moldflash.
Sn-thickness might be reduced by mechanical handling.
PACKAGE
ISSUE DATE
JEDEC STANDARD
(YY-MM-DD)
ITEM NO.
SOIC8-1
18-07-19
MS-012
BOTTOM VIEW
ANSI
REVISION DATE
(YY-MM-DD)
REV.NO.
DRAWING-NO.
ISSUE
F
SPECIFICATION
TYPE
19-06-25
3
CSOIC0083002.1
ZG
NO.
2099_Ver.03
c Copyright 2018 TDK-Micronas GmbH, all rights reserved
Fig. 4–1:
SOIC8-1: Plastic small outline IC package, 8 leads, gullwing bent, 150 mil
Ordering code: DJ
Weight approximately 0.076 g
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DATA SHEET
4.2. Soldering, Welding, Assembly
Information related to solderability, welding, assembly, and second-level packaging is
included in the document “Guidelines for the Assembly of Micronas Packages”.
It is available on the TDK-Micronas website (http://www.micronas.com/en/service-center/
downloads) or on the service portal (http://service.micronas.com).
4.3. Storage and Shelf Life
Information related to storage conditions of Micronas sensors is included in the document “Guidelines for the Assembly of Micronas Packages”. It gives recommendations
linked to moisture sensitivity level and long-term storage.
It is available on the TDK-Micronas website (http://www.micronas.com/en/service-center/downloads) or on the service portal (http://service.micronas.com).
4.4. Size of Sensitive Area
Hall plate are = 275 µm x 275 µm
See Fig. 4-1 on page xy for more information on the Hall plate position.
4.5. Definition of Magnetic-Field Vectors
Note
Die 2 is 180° rotated in relation to die 1. There for the measurement values
of X and Y components have opposite sign's compared to die 1.
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DATA SHEET
4.6. Pin Connections and Short Description
Pin No.
Pin Name
Type
Short Description
1
VSUP1
SUPPLY
Supply Voltage Pin1
2
GND1
GND
Ground 1
3
TEST1
I/O
Test 1
4
OUT1
I/O
Push-Pull Output and Programming Pin 1
5
VSUP2
SUPPLY
Supply Voltage Pin 2
6
GND2
GND
Ground 2
7
TEST2
I/O
Test 2
8
OUT2
I/O
Push-Pull Output and Programming Pin 2
Die 1
Die 2
1 VSUP 1
5 VSUP 2
OUT 2
OUT 1
8
4
3
TEST 1
2
GND 1
6
GND 2
7
TEST 2
Fig. 4–2: Pin configuration
Note
It is recommended to connect the TEST1 pin to GND1 and to connect the
TEST2 pin to GND2
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DATA SHEET
4.7. Absolute Maximum Ratings
Stresses beyond those listed in the “Absolute Maximum Ratings” may cause permanent
damage to the device. This is a stress rating only. Functional operation of the device at
these conditions is not implied. Exposure to absolute maximum rating conditions for
extended periods will affect device reliability.
This device contains circuitry to protect the inputs and outputs against damage due to
high static voltages or electric fields; however, it is advised that normal precautions be
taken to avoid application of any voltage higher than absolute maximum-rated voltages
to this high-impedance circuit.
All voltages listed are referenced to ground (GND).
Symbol
Parameter
Pin
Min.
Max.
Unit
Condition
VSUP
Supply Voltage
VSUPx
18
18
V
t < 1 h 3)
VOUT
Output Voltage
OUTx
6
18
V
t < 1 h 3)
VOUT VSUP
Excess of Output Voltage
over Supply Voltage
VSUPx,
OUTx
2
V
IOUT
Continuous Output Current
OUTx
10
10
mA
TJ
Junction Temperature under
Bias
50
190
°C
1)
Tstorage
Transportation/Short Term
Storage Temperature
50
150
°C
Device only
without packing
material
Bmax
Magnetic Field
unlimited
unlimited
T
VESD
ESD Protection
VSUPx,
OUTx,
GNDx,
TESTx
2
2
kV
2)
VSUP1,
OUT1,
GND1,
TEST1
4
4
kV
2)
VSUP2,
OUT2,
GND2,
TEST2
4
4
kV
2)
For all pin
combinations
(including die 1
to die 2)
For all pin
combinations
(die 1 only)
For all pin
combinations
(die 2 only)
1)
For 96 h - Please contact TDK-Micronas for other temperature requirements
AEC-Q100-002 (100 pF and 1.5 k)
3)
No cumulated stress
2)
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DATA SHEET
4.8. Recommended Operating Conditions
Functional operation of the device beyond those indicated in the “Recommended Operating Conditions/Characteristics” is not implied and may result in unpredictable behavior, reduce reliability and lifetime of the device.
All voltages listed are referenced to ground (GNDx).
Symbol
Parameter
Pin
Min.
Typ.
Max.
Unit
Condition
VSUP
Supply Voltage of one die
VSUPx
4.5
5.7
5.0
6.0
5.5
6.5
V
V
Normal Operation
During Programming
IOUT
Continuous Output Current
OUTx
1.2
1.2
mA
5.5
mA
HAR 3715 and
HAR 372x
HAR 373x
5
10
k
HAR 3715 and
HAR 372x
pull-up & pull-down
resistor
1
k
HAR 373x pull-up
resistor
0.33
47
330
nF
1
nF
HAR 3715 and
HAR 372x
HAR 373x
0 °C < Tamb < 55 °C
RL
CL
Load Resistor
Load Capacitance
OUTx
OUTx
NPRG
Number of Memory Programming Cycles1)
100
cycles
BAMP
Recommended MagneticField Amplitude
20
100
mT
TJ
Junction Temperature 2)
40
170
°C
for 1000 h
1)
The EEPROM is organized in three banks. Each bank contains up to 32 addresses. It is not allowed to
program only one single address within one of the three banks. In case of programming one single
address the complete bank has to be programmed.
2)
Depends on the temperature profile of the application. Please contact TDK-Micronas for life time calculations.
Note
It is also possible to operate the sensor with magnetic fields down to ±5 mT.
For magnetic fields below ±20 mT the sensor performance will be reduced.
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DATA SHEET
4.9. Characteristics
at TJ = 40 °C to 170 °C, VSUPx = 4.5 V to 5.5 V, GNDx = 0 V, after programming and
locking of the sensor, at Recommended Operation Conditions if not otherwise specified
in the column “Conditions”.
Typical Characteristics for TJ = 25 °C and VSUPx = 5 V.
Symbol
Parameter
Pin
Limit Values
Min.
ISUP
tStartup
Test Conditions
Typ.
Max.
8
13
mA
Current consumption of each die
12
bit
12
bit
For HAR 3715/HAR 372x ratiometric to VSUPx
For HAR 373x (depends on
PWM Period)
1.7
ms
CL = 10 nF (see Fig. 4–3 on
page 35)
VSUPx 3.3
3.9
4.3
V
Functionality Mode: Normal
3.1
3.7
4.1
V
Functionality Mode: Extended
Supply Current
over Temperature Range
VSUPx
Resolution 1)
OUTx
Start-up Time2)
Unit
OUTx
Overvoltage and Undervoltage Detection
VSUP,UV
Undervoltage
Detection Level
CUST_SETUP register bit 5
VSUP,UVhyst
Undervoltage
Detection Level
Hysteresis2)
VSUPx
200
mV
VSUP,OV
Overvoltage
Detection Level
VSUPx 5.6
6.2
6.9
V
Functionality Mode: Normal
8.5
9.5
10.4
V
Functionality Mode: Extended
CUST_SETUP register bit 5
VSUP,OVhyst
Overvoltage
Detection Level
Hysteresis2)
VSUPx
225
mV
Output Voltage in Case of Error Detection
VSUP,DIAG
Supply Voltage
required to get
defined Output
Voltage Level2)
VSUPx
2.3
V
VError,Low
Output Voltage
Range of Lower
Error Band2)
OUTx
0
4
%VSUP VSUP > VSUP,DIAG
Analog Output
5 k RL VSUP,DIAG
Analog Output
5 k RL = RL4) < 10k
VOUT
Output voltage
at open GNDx
line
OUTx
4.85
4.9
5.0
V
VSUP = 5 V
RL4) = 10 kto 200k
4.8
4.9
5.0
V
VSUP = 5 V
5 k>= RL4) < 10k
HAR 373x (Digital Output)
VOUTH
Output High
Voltage
OUTx
4.8
4.9
V
VSUP = 5 V
RLpull-up/-down = 5 k
VOUTL
Output Low
Voltage
OUTx
0.1
0.2
V
VSUP = 5 V
RLpull-up/-down = 5 k
0.4
0.65
V
2)
0.2
0.4
µs
VSUP = 5 V, RL Pull-up= 1 k
CL = 1 nF
trise
Rise Time of
Digital Output2)
OUTx
VSUP = 5 V
RLpull-up = 1 k
2)
Characterized on small sample size, not tested.
Signal band area with full accuracy is located between VOUTL and VOUTH. The sensors accuracy is
reduced below VOUTL and above VOUTH
4) RL can be pull-up or pull-down resistor
5) 4 kHz digital low-pass filter (LP-Filter = off): +/ 20 mT min. magnetic-field amplitude; f
BW = 22.5 kHz
3)
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DATA SHEET
Symbol
Parameter
Pin
Limit Values
Min.
Typ.
Max.
Unit
Test Conditions
VSUP = 5 V, RL Pull-up= 1 k
CL = 1 nF
Fall Time of
Digital Output2)
OUTx
0.25
0.4
µs
ROUT_DIG On Resistance
of Digital PullUp Driver
OUTx
100
200
tfall
PWM Output
tstartup
Start-up Time
OUTx
1.3
1.7
ms
tOSD
Overall Signal
Delay1)
OUTx
0.312
0.343
ms
Overall signal delay from magnetic-field input to sensor output. Transmission time of
selected PWM frequency to be
added.
Based on 8 kHz sample frequency
OUTNoise
Output Noise
RMS 1)2)
OUTx
0.03
0.074
%
Output range 100% DC
fPWM
PWM Frequency
OUTx
1800
900
450
180
2000
1000
500
200
2200
1100
550
220
Hz
Customer programmable
JPWM
RMS PWM Jitter 1)
OUTx
1
2
LSB12
fPWM = 1 kHz
ttick
Clock Tick Time OUTx
2.75
µs
tnlow
Nibble Low
Time
OUTx
5
ttick
tsync
Calibration /
Synchronization Period
OUTx
56
ttick
tnibble
Status & Communication Nibble, Data
Nibbles and
CRC Nibble
Period
OUTx
12
27
ttick
tmessage
Message Time
OUTx
116
176
ttick
tpause
Pause Period
Time
OUTx
12
70
ttick
SENT Output
1)
2)
tnibble = 12 + [status|data|CRC]
Characterized on small sample size, not tested
4 kHz digital low-pass filter (LP-Filter = off): +/ 20 mT min. magnetic-field amplitude; fBW = 22.5 kHz
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DATA SHEET
Symbol
Parameter
Pin
Limit Values
Min.
Typ.
Max.
Unit
Test Conditions
SOIC8 Package
Thermal Resistance Junction
to Air
116
K/W
Determined with a 1S1P board
111
K/W
Determined with a 2S2P board
Rthjc
Thermal Resistance Junction
to Case
30
K/W
Determined with a 1S1P and a
2S2P board
RISOL
Isolation
Resistance1)
GND1
GND2
4
M
Between two dies
Rthja
1) GND’s galvanic isolation not tested
VSUP
VSUP
final value
VOUT
tStartup
Fig. 4–3: POR timing
Vout [V]
VSUP,DIAG
VSUP,UV
5
VSUP,OV
VSUP [V]
: Output Voltage will be between VSUP and GND
: CUST_SETUP Register bit 7 set to 1
: CUST_SETUP Register bit 7 set to 0
Fig. 4–4: Behavior of HAR 3715 and HAR 372x for different VSUP
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DATA SHEET
Voltage [V]
5.0
Typ. 4.2 V
Typ. 2.3 V
VSUP
First PWM period shall be
disgarded. Might be invalid.
PWM high duty
PWM low duty
0
5.0
Error Band = 1
Customer Lock = 1
OUT
0
Drive Low
1/PWMF (2kHz-200Hz)
5.0
Drive High
Error Band = X
Customer Lock = 0
Or
Error Band = 0
Customer Lock = 1
OUT
0
1/PWMF (2kHz-200Hz)
tStartup
time
Start-up behavior
customer programmable
(high or low)
Fig. 4–5: Start-up behavior of HAR 373x with PWM output
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4.10. Magnetic Characteristics
at TJ = 40 °C to 170 °C, VSUPx = 4.5 V to 5.5 V, GNDx = 0 V, after programming and
locking of the sensor, at Recommended Operation Conditions if not otherwise specified
in the column “Conditions”. Typical characteristics for TJ = 25 °C and VSUPx = 5 V.
Symbol
Parameter
Pin No. Min.
Typ. Max. Unit
RANGE
Detectable angle
range
OUTx
0
360
°
res
Angle resolution
OUTx
0.09
°
(360°/4096)
Elinxy
XY angle linearity
error (on output of
CORDIC)
OUTx
0.5
0.5
°
Min. BAMP =±30 mT,
X/Y angle linearity
error over temperature (on output of
CORDIC)
OUTx
Elinxy
Test Conditions
TJ =25 °C1) 2) 3)
1.0
1.7
1.0
1.7
°
°
Min. BAMP =±30 mT1) 2) 3)
TJ = 40 ... 150°C
TJ > 150 ...170°C
1.5
2.4
1.5
2.4
°
°
Min. BAMP =±20 mT1) 2) 3)
TJ = 40 ...150°C
TJ > 150 ...170°C
ASMmX/Y_Z
Absolute sensitivity
mismatch on raw
signals between X/
Y and Z channel
OUTx
3
3
%
TJ =25 °C
SenseXYZ
Sensitivity of X/Y
and Z Hall Plate
OUTx
118
128
138
LSB/
mT
TJ =25 °C
SMmX/Y_Z
Thermal sensitivity
mismatch drift of
calibrated signals
between X/Y and Z
channel
OUTx
%
related to 25 °C1)
TJ = 40 ...150°C
TJ > 150 ...170°C
Thermal sensitivity
mismatch drift of
calibrated signals
between X and Y
channel
OUTx
Offset of calibrated
signals of X or Y
channel
OUTx
Offset of calibrated
signal of Z channel
OUTx
SMmXY
OffsetXY
OffsetZ
2.5
3.5
2.5
3.5
%
2.0
3.0
2.0
3.0
%
%
related to 25 °C1)
TJ = 40 ...150°C
TJ > 150 ...170°C
20
20
LSB15
TJ =25 °C1)
Can be compensated in customer application
12
12
LSB15
TJ =25 °C1)
Can be compensated in customer application
1) Characterized
on sample base, 3-sigma values, not tested for each device
angular error based on characterization and not on single error summation
3) After optimal EOL calibration at room temperature
2) Calculated
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Symbol
Parameter
Pin No. Min.
Typ. Max. Unit
Test Conditions
OffsetXY
Offset drift of calibrated signals of X
or Y channel
OUTx
50
100
50
100
LSB15
LSB15
over full temperature range
related to 25 °C1)
TJ = 40 ...150°C
TJ > 150 ...170°C
OffsetZ
Offset drift of calibrated signals of Z
channel
OUTx
10
10
LSB15
over full temperature range
related to 25 °C1)
SMmXYZlife
OUTx
Relative sensitivity
mismatch drift of
calibrated signals
between X or Y
channel and Z channel over life time
1.0
%
after 1000h HTOL1)
OffsetXYlife
Offset drift of calibrated signals of X
or Y channel
OUTx
30
LSB15
after 1000h HTOL1)
OffsetZlife
Offset drift of calibrated signal of Z
channel
OUTx
5
LSB15
after 1000h HTOL1)
1) Characterized
on sample base, 3-sigma values, not tested for each device
Fig. 4–6: Angular error versus magnetic-field amplitude over full temperature range for devices
using X and Y magnetic-field component (for digital output)
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HAR 3715, HAR 372x, HAR 373x
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5. Application Notes
5.1. Ambient Temperature
Due to the internal power dissipation, the temperature on the silicon chip (junction temperature TJ) is higher than the temperature outside the package (ambient temperature TA).
TJ = TA + T
The maximum ambient temperature is a function of power dissipation, maximum allowable die temperature and junction to ambient thermal resistance (Rthja). With a maximum of 5.5 V operating supply voltage the power dissipation P is 0.0825 per die, for a
total of 0.165 . The junction to ambient thermal resistance Rthja is specified in
Section 4.9. on page 31.
The difference between junction and ambient air temperature is expressed by the following
equation:
T = P * Rthja
Note
The calculated self-heating of the devices is only valid for the Rth test boards.
Depending on the application setup the final results in an application environment might deviate from these values.
5.2. EMC and ESD
Please contact TDK-Micronas for detailed information on EMC and ESD results.
5.3. Application Circuit for HAR 3715 and HAR 372x
For EMC protection, it is recommended to connect one ceramic 47 nF capacitor each
between ground and the supply voltage, respectively the output voltage pin.
VSUP 1
OUT1
VSUP 2
HAR 3715
OUT2
HAR 372x
47 nF
47 nF
47 nF
47 nF
GND1
GND2
Fig. 5–1: Recommended application circuit for HAR 3715 and HAR 372x
If the two dies are operated in parallel to the same supply and ground line, they can be programmed individually as the communication with the sensors is done via their output pins.
Note
It is recommended to connect TEST1 to GND1 and TEST2 to GND2.
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5.4. Application Circuit for HAR 373x
PWM Output
In case of PWM output mode, it is recommended to connect one ceramic 47 nF capacitor between ground and the supply voltage and one ceramic 1 nF capacitor between the
output pin and ground for EMC protection.
VSUP1
VSUP2
OUT1
OUT2
HAR 373x
47 nF
47 nF
1 nF
1 nF
GND1
GND2
Fig. 5–2: Recommended application circuit for HAR 373x in PWM mode
SENT Output
In case of SENT output mode, it is recommended to connect one ceramic 47 nF capacitor between ground and the supply voltage and a filter structure at the output pin for
EMC protection as well for having a SENT standard compliant output slew rate.
Following two setups have been tested:
– C01 = 180 pF, C02 = 2.2 nF, R01 = 120
– C01 = 180 pF, C02 = 3.3 nF, R01 = 180
OUT1
VSUP2
R01
R01
OUT2
HAR373x
C02
C01
GND1
C01
47 nF
47 nF
VSUP1
C02
GND2
Fig. 5–3: Recommended application circuit for HAR 373x
If the two dies are operated in parallel to the same supply and ground line, they can be programmed individually as the communication with the sensors is done via their output pins.
Note
It is recommended to connect TEST1 to GND1 and TEST2 to GND2.
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HAR 3715, HAR 372x, HAR 373x
DATA SHEET
5.5. Measurement of a PWM Output Signal of HAR 373x
In case of the PWM output, the magnetic-field information is coded in the duty cycle of
the PWM signal. The duty cycle is defined as the ratio between the high time “s” and the
period “d” of the PWM signal (see Fig. 5–4).
Note
The PWM signal is updated with the rising edge. Hence, for signal evaluation, the trigger-level must be the rising edge of the PWM signal.
V(OUTx)
d
s
VHigh
VLow
time
Update
Fig. 5–4: Definition of PWM signal
5.6. Recommended Pad Size SOIC8 Package
2.200
0.600
1.270
5.200
Fig. 5–5: Recommended Pad Size dimensions in mm
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HAR 3715, HAR 372x, HAR 373x
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6. Programming of the Sensor
HAR 37xy features two different customer modes. In Application Mode the sensors provide a ratiometric analog output voltage or a digital output signal (PWM or SENT). In
Programming Mode it is possible to change the register settings of the sensor.
After power-up the sensor is always operating in the Application Mode. It is switched to
the Programming Mode by a pulse at the sensor output pin.
6.1. Programming Interface
In Programming Mode HAR 37xy is addressed by modulating a serial telegram on the
sensors output pin. Both sensors answer with a modulation of the output voltage.
A logical “0” is coded as no level change within the bit time. A logical “1” is coded as a level
change of typically 50% of the bit time. After each bit, a level change occurs (see Fig. 6–1).
The serial telegram is used to transmit the EEPROM content, error codes and digital
values of the angle information from and to the sensor.
tbittime
tbittime
or
logical 0
tbittime
tbittime
or
logical 1
50%
50%
50%
50%
Fig. 6–1: Definition of logical 0 and 1 bit
A description of the communication protocol and the programming of the sensor is available in a separate document (HAL/HAR 37xy Programming Guide).
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HAR 3715, HAR 372x, HAR 373x
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Table 6–1: Telegram parameters (All voltages are referenced to GNDx.)
Symbol
VOUTL
Parameter
Pin No.
Voltage for Output
Low Level during
Programming
through Sensor
Output Pin
OUTx
Voltage for Output
High Level during
Programming
through Sensor
Output Pin
OUTx
VSUPProgram
VSUP Voltage for
EEPROM &
NVRAM programming (during Programming)
VSUPx
tbittime
Biphase Bit Time
OUTx
VOUTH
Slew rate
Limit Values
Min.
Typ.
Max.
0
0.2*VSUP
V
1
V
0
OUTx
Unit
Test Conditions
for VSUP = 5 V
0.8*VSUP
VSUP
V
4
5.0
V
for VSUP = 5 V
5.7
6.0
6.5
V
Supply voltage for bidirectional
communication via output pin
as well as for 3-wire communication via supply voltage modulation
900
225
1000
250
1100
275
µs
µs
2
V/µs
Cust. programmable, TJ = 25°C
Bit 13 of Customer Setup = 0
Bit 13 of Customer Setup = 1
6.2. Programming Environment and Tools
For the programming of HAR 37xy during product development a programming tool including hardware and software is available on request. It is recommended to use the
TDK-Micronas’ tool kit (TDK-MSP V1.x or USB-Kit and LabVIEW Programming Environment) in order to facilitate the product development. The details of programming
sequences are described in the “HAL 37xy, HAR 372x, HAR 373x User Manual”.
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HAR 3715, HAR 372x, HAR 373x
DATA SHEET
6.3. Programming Information
For production and qualification tests, it is mandatory to set the LOCK bit to one and the
POUT bit to zero after final adjustment and programming of HAR 37xy.
Before locking the device, it is recommended to read back all register values to ensure
that the intended data is correctly stored in the sensor’s memory. Alternatively, it is also
possible to cross-check the sensor output signal with the intended output behavior.
The success of the LOCK process shall be checked by reading the status of the LOCK
bit after locking.
It is also mandatory to check the acknowledge (first and second) of the sensor after
each write and store sequence to verify if the programming of the sensor was successful. To enable debugging of the production line, it is recommended to read back the
PROG_DIAGNOSIS register in case of a missing second acknowledge. Please check
“HAL/HAR 37xy Programming Guide” for further details.
Electrostatic Discharges (ESD) may disturb the programming pulses. Please take precautions against ESD.
Note
Please check also the “HAL 37xy, HAR 372x, HAR 373x User Manual” and
relevant documentation for the TDK-MSP V1.x or USB-Kit. It contains additional information and instructions about the programming of the devices.
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HAR 3715, HAR 372x, HAR 373x
DATA SHEET
7. Document History
1. “HAR 3715, HAR 372x, HAR 373x Robust Dual-Die Programmable 2D Position Sensor Family
with Arbitrary Output Function”, June 17, 2015, AI000180_001EN.
First release of the advance information.
2. “HAR 3715, HAR 372x, HAR 373x Robust Dual-Die Programmable 2D Position Sensor Family
with Arbitrary Output Function”, Jan. 18, 2016, DSH000175_001EN.
First release of the data sheet.
Major changes:
– Assembly and storage information changed
– Absolute maximum ratings:
ESD protection voltages changed
– Magnetic characteristics: values changed
3. “HAR 3715, HAR 372x, HAR 373x Robust Dual-Die Programmable 2D Position Sensor Family
with Arbitrary Output Function”, May 5, 2017, DSH000175_002EN.
Second release of the data sheet.
Major changes:
– Update of some electrical parameters
– Storage temperature added
– Graph with start-up behavior in PWM mode added
4. “HAR 3715, HAR 372x, HAR 373x Robust Dual-Die Programmable 2D Position Sensor Family
with Arbitrary Output Function”, Oct. 25, 2019, DSH000175_003EN.
Second release of the data sheet.
Major changes:
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Disclaimer updated
Figure 2-1 “Ordering Code Principle” updated
Figure 3-2 “Signal path of HAR 37xy (equal for both dies)” updated
Figure 4-1 “Package Drawing” updated
Section 4.4 “Size of Sensitive Area”
Section 4.5 “Definition of Magnetic-Field Vectors” updated
Section 4.3.3 “Package Parameters and Position” deleted
Table “Pin Connections and Short Description” updated
Table “Absolute Maximum Ratings” updated
Recommended Operating Condition TJ updated
Table “Characteristic Parameters” updated
Table “Magnetic Characteristics” updated
Section 6.2 “Programming Environment and Tools” updated
Section 6.3 “Programming Information” updated
TDK-Micronas GmbH
Hans-Bunte-Strasse 19 D-79108 Freiburg P.O. Box 840 D-79008 Freiburg, Germany
Tel. +49-761-517-0 Fax +49-761-517-2174 www.micronas.com
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