Hardware
Documentation
Dat a Sh e e t
HAR 3715, HAR 372x,
HAR 373x
Robust Dual-Die Programmable
2D Position Sensor Family with
Arbitrary Output Function
Edition May 5, 2017
DSH000175_002EN
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 reli-
able. 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, prod-
uct 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 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
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TDK-Micronas’ products are not designed, intended or authorized for use as compo-
nents 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 sys-
tem or transmitted without the express written consent of TDK-Micronas.
TDK-Micronas Trademarks
– HAL
– 3D HAL
Third-Party Trademarks
All other brand and product names or company names may be trademarks of their
respective companies.
TDK-Micronas GmbH
May 5, 2017; DSH000175_002EN
2
DATA SHEET
HAR 3715, HAR 372x, HAR 373x
Contents
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Section
1.
1.1.
1.2.
2.
2.1.
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.
4.
4.1.
4.2.
4.3.
4.3.1.
4.3.2.
4.3.3.
4.4.
4.5.
4.5.1.
4.6.
4.7.
4.8.
5.
5.1.
5.2.
5.3.
5.4.
5.5.
5.6.
6.
6.1.
6.2.
6.3.
7.
Title
Introduction
Major Applications
Features
Ordering Information
Device-Specific Ordering Code
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
Specifications
Outline Dimensions
Soldering, Welding, Assembly
Sensitive Areas
Physical Dimension
Definition of Magnetic Field Vectors
Package Parameters and Position
Pin Connections and Short Description
Absolute Maximum Ratings
Storage and Shelf Life
Recommended Operating Conditions
Characteristics
Magnetic Characteristics
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
Programming of the Sensor
Programming Interface
Programming Environment and Tools
Programming Information
Document History
TDK-Micronas GmbH
May 5, 2017; DSH000175_002EN
3
DATA SHEET
HAR 3715, HAR 372x, HAR 373x
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 fam-
ily using the 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 new family has several members. HAR 372x provide linear, ratiometric analog out-
put signals with integrated wire-break detection working with pull-up or pull-down resis-
tors. 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 con-
figurable 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
HAR 3715
HAR 3725
HAR 3726
HAR 3727
HAR 3735
HAR 3736
HAR 3737
Output Format
Analog/Modulo
Analog
Analog
Analog
PWM & SENT
PWM & SENT
PWM & SENT
Detectable Field Component
B
X
and B
Y
B
X
and B
Y
B
Y
and B
Z
B
X
and B
Z
B
X
and B
Y
B
Y
and B
Z
B
X
and B
Z
TDK-Micronas GmbH
May 5, 2017; DSH000175_002EN
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DATA SHEET
HAR 3715, HAR 372x, HAR 373x
On-chip signal processing calculates the angle out of two of the magnetic field compo-
nents and converts this value to an output signal. Due to the measurement method, the
sensor exhibits excellent drift performance over the specified temperature range result-
ing in a new class of accuracy for angular or linear measurements.
Additionally to the built-in signal processing, the sensor features an arbitrary program-
mable 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 detec-
tion 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 indi-
cated 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 eight-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 ISO26262 rules. Sensor’s versatile programming characteristics and its
high accuracy, make the HAR 37xy the optimal system solution for applications such as:
– 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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May 5, 2017; DSH000175_002EN
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