3-Axis Magnetic Sensor Hybrid
HMC2003
The Honeywell HMC2003 is a high sensitivity, three-axis magnetic sensor hybrid
assembly used to measure low magnetic field strengths. Honeywell’s most
sensitive magneto-resistive sensors (HMC1001 and HMC1002) are utilized to
provide the reliability and precision of this magnetometer design.
The HMC2003 interface is all analog with critical nodes brought out to the pin
interfaces for maximum user flexibility. The internal excitation current source and
selected gain and offset resistors, reduces temperature errors plus gain and
offset drift. Three precision low-noise instrumentation amplifiers with 1kHz low
pass filters provide accurate measurements while rejecting unwanted noise. A
RS-232 development kit version is available that includes a windows compatible
demo program, interface cable, AC adapter, and carrying case.
Applications include: Precision Compassing, Navigation Systems, Attitude Reference, Traffic Detection, Proximity
Detection and Medical Devices
Honeywell continues to maintain product excellence and performance by introducing innovative solid-state magnetic
sensor solutions. These are highly reliable, top performance products that are delivered when promised. Honeywell’s
magnetic sensor solutions provide real solutions you can count on.
FEATURES BLOCK DIAGRAM
20-pin Wide DIP Footprint (1” by 0.75”)
Precision 3-axis Capability
Factory Calibrated Analog Outputs
40 micro-gauss to 2 gauss Dynamic Range
Analog Output at 1 Volt/gauss (2.5V @ 0 gauss)
Onboard +2.5 Volt Reference
+6 to +15 Volt DC Single Supply Operation
Very Low Magnetic Material Content
-40° to 85°C Operating Temperature Range
HMC2003
SPECIFICATIONS
Characteristics Conditions Min Typ Max Units
Magnetic Field
Sensitivity 0.98 1 1.02 V/gauss
Null Field Output 2.3 2.5 2.7 V
Resolution 40 gauss
Field Range Maximum Magnetic Flux Density -2 2 gauss
Output Voltage Each Magnetometer Axis Output 0.5 4.5
Bandwidth 1 kHz
Errors
Linearity Error 1 gauss Applied Field Sweep 0.5 2 %FS
2 gauss Applied Field Sweep 1 2
Hysteresis Error 3 Sweeps across 2 gauss 0.05 0.1 %FS
Repeatability Error 3 Sweeps across 2 gauss 0.05 0.1 %FS
Power Supply Effect PS Varied from 6 to 15V 0.1 %FS
With 1 gauss Applied Field Sweep
Offset Strap
Resistance 10.5 ohms
Sensitivity 46.5 47.5 48.5 mA/gauss
Current 200 mA
Set/Reset Strap
Resistance 4.5 6 ohms
Current 2 us pulse, 1% duty cycle 3.0 3.2 5 amps
Tempcos
Field Sensitivity -600 ppm/°C
Null Field Set/Reset Not Used 400 ppm/°C
Set/Reset Used 100
Environments
Temperature Operating -40 - +85 °C
Storage -55 - +125 °C
Shock 100 g
Vibration 2.2 g rms
Electrical
(3)
Supply Voltage 6 15 VDC
Supply Current 20 mA
(1) Unless otherwise stated, test conditions are as follows: Power Supply = 12VDC, Ambient Temp = 25°C, Set/Reset
switching is active
(2) Units: 1 gauss = 1 Oersted (in air) = 79.58 A/m = 10E5 gamma
(3) Transient protection circuitry should be added across V+ and Gnd if an unregulated power supply is used.
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HMC2003
GENERAL DESCRIPTION
Honeywell’s three axis magnetic sensor hybrid uses three permalloy magneto-resistive sensors and custom interface
electronics to measure the strength and direction of an incident magnetic field. These sensors are sensitive to magnetic
fields along the length, width, and height (X, Y, Z axis) of the 20-pin dual-in-line hybrid. Fields can be detected less than
40 microgauss and up to 2 gauss. Analog outputs are available for each X, Y and Z axis from the hybrid. With the
sensitivity and linearity of this hybrid, changes can be detected in the earth’s magnetic field to provide compass headings
or attitude sensing. The high bandwidth of this hybrid allows for anomaly detection of vehicles, planes, and other ferrous
objects at high speeds.
The hybrid is packaged on a small printed circuit board (1” by 0.75”) and has an on-chip +2.5 voltage reference that
operates from a single 6 to 15V supply. The hybrid is ideal for applications that require two- or three-axis magnetic
sensing and have size constraints and need a magnetic transducer (magnetometer) front-end. Note that the hybrid’s
resistor values will vary, or an abscense of some resistor components, is likely due to individual factory calibration.
Integrated with the sensor elements composed of wheatstone bridge circuits, are magnetically coupled straps that replace
the need for external field coils and provide various modes of operation. The Honeywell patented integrated field offset
straps (Xoff+ and Xoff-, etc.) can be used electrically to apply local magnetic fields to the bridges to buck, or offset an
applied incident field. This technique can be used to cancel unwanted ambient magnetic fields (e.g. hard-iron magnetism)
or in a closed loop field nulling measurement circuit. The offset straps nominally provide 1 gauss fields along the sensitive
axis per 48mA of offset current through each strap.
The HMC2003’s magnetic sensors can be affected by high momentary magnetic fields that may lead to output signal
degradation. In order to eliminate this effect, and maximize the signal output, a magnetic switching technique can be
applied to the bridge using set/reset pins (SR+ and SR-) that eliminates the effect of past magnetic history. Refer to the
application notes that provide information on set/reset circuits and operation.
PINOUT DIAGRAM AND PACKAGE DRAWING
Symbol Millimeters Inches
Min Max Min Max
A 10.92 11.94 0.43 0.47
A1 2.92 3.42 0.115 0.135
D 25.91 27.30 1.02 1.075
e 2.41 2.67 0.095 0.105
H 18.03 19.69 0.71 0.775
ORDER INFORMATION
Ordering Number Product
HMC2003 Three-Axis Magnetic Sensor Hybrid
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HMC2003
FIND OUT MORE
For more information on Honeywell’s Magnetic Sensors visit us online at www.magneticsensors.com or contact us at
800-323-8295 (763-954-2474 internationally).
The application circuits herein constitute typical usage and interface of Honeywell product. Honeywell does not warranty or assume liability of customer-
designed circuits derived from this description or depiction.
Honeywell reserves the right to make changes to improve reliability, function or design. Honeywell does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
U.S. Patents 4,441,072, 4,533,872, 4,569,742, 4,681,812, 4,847,584 and 6,529,114 apply to the technology described
Honeywell
12001 Highway 55
Plymouth, MN 55441 Form #900151 Rev G
Tel: 800-323-8295 March 2011
www.honeywell.com/magneticsensors
4 ©2011 Honeywell International Inc. www.honeywell.com
