Hardware
Documentation
Dat a Sh e e t
HAL 371x, HAL 372x,
HAL 373x
Robust Programmable
2D Position Sensor Family
with Arbitrary Output Function
®
Edition Oct. 27, 2017
DSH000192_001EN
DATA SHEET
HAL 371x, HAL 372x, HAL 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.
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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.
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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
Oct. 27, 2017; DSH000192_001EN
2
DATA SHEET
HAL 371x, HAL 372x, HAL 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.
4.6.
4.7.
4.8.
4.9.
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 Codes
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 Area
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 HAL 3715 and HAL 372x
Application Circuit for HAL 3711 and HAL 373x
Measurement of a PWM Output Signal of HAL 3711 & HAL 373x
Recommended Pad Size SOIC8 Package
Programming of the Sensor
Programming Interface
Programming Environment and Tools
Programming Information
Document History
TDK-Micronas GmbH
Oct. 27, 2017; DSH000192_001EN
3
DATA SHEET
HAL 371x, HAL 372x, HAL 373x
Robust Programmable 2D Position Sensor Family with Arbitrary Output Function
Release Note: Revision bars indicate significant changes to the previous document.
1. Introduction
The HAL 37xy family comprises the second generation of sensors using the proprietary
Micronas 3D HAL
technology. This new family has several members. HAL 372x
provides a linear, ratiometric analog output signal with integrated wire-break detection
working with pull-up or pull-down resistors. Compared to HAL 372x, the HAL 371x is
splitting the 360° measurement range either into four repetitive 90° (MOD 90°) or three
120° (MOD 120°) segments. HAL 373x features digital output formats like PWM and
SENT (according to SAE-J2716 release 2010). The digital output format is customer
programmable. The PWM output is 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, HAL 37xy is also sensitive
for 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 B
X
, B
Y
, and B
Z
. This
enables a new set of applications for position detection, like wide distance, angle or
through-shaft angular measurements. The Table 1–1 below describes the different family
members.
Table 1–1:
HAL 37xy family overview
Type
HAL 3711
HAL 3715
HAL 3725
HAL 3726
HAL 3727
HAL 3735
HAL 3736
HAL 3737
Output Format
PWM/Modulo
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
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
Oct. 27, 2017; DSH000192_001EN
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DATA SHEET
HAL 371x, HAL 372x, HAL 373x
On-chip signal processing calculates the angle from 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 programm-
able linear 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 sensors contain advanced on-board diagnostic features that enhance fail-safe detec-
tion. 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
changing 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 in a
junction temperature range from
40
°C up to 170 °C.
The sensors are available in a four-pin leaded transistor package TO92UP, as well as in
a SOIC8 package.
1.1. Major Applications
Due to the sensor’s versatile programming characteristics and its high accuracy, the
HAL 37xy is the optimal system solution for applications such as:
– Linear movement measurement,
• EGR valve position
• 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 HAL 371x
– Joystick
– Non-contact potentiometer
TDK-Micronas GmbH
Oct. 27, 2017; DSH000192_001EN
5
