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PDF HMC5983 Data sheet ( Hoja de datos )
| Número de pieza | HMC5983 | |
| Descripción | 3-Axis Digital Compass IC | |
| Fabricantes | Honeywell | |
| Logotipo |  |
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3-Axis Digital Compass IC
HMC5983
Advanced Information
The Honeywell HMC5983 is a temperature compensated three-axis integrated circuit magnetometer. This surface-mount,
multi-chip module is designed for low-field magnetic sensing for applications such as
automotive and personal navigation, vehicle detection, and pointing.
The HMC5983 includes our state-of-the-art, high-resolution HMC118X series
magnetoresistive sensors plus an ASIC containing amplification, automatic degaussing
strap drivers, offset cancellation, and a 12-bit ADC that enables 1° to 2° compass heading
accuracy. The I²C or SPI serial bus allows for easy interface. The HMC5983 is a
3.0x3.0x0.9mm surface mount 16-pin leadless chip carrier (LCC).
The HMC5983 utilizes Honeywell’s Anisotropic Magnetoresistive (AMR) technology that provides advantages over other
magnetic sensor technologies. Honeywell’s anisotropic, directional sensors excel in linearity, low hysteresis, null output
and scale factor stability over temperature, and with very low cross-axis sensitivity. These sensors’ solid-state
construction is designed to measure both the direction and the magnitude of magnetic fields, from milli-gauss to 8 gauss.
Honeywell’s Magnetic Sensors are among the most sensitive and reliable low-field sensors in the industry.
FEATURES
3-Axis Magnetoresistive Sensors and
ASIC in a 3.0x3.0x0.9mm LCC Surface
Mount Package
BENEFIT
Small size for Highly Integrated Products. Just add a micro-
controller interface, plus two external SMT Capacitors
designed for high volume, cost sensitive OEM Designs.
Easy to assemble & compatible with High Speed SMT Assembly.
Temperature Compensated Data Output Automatically maintains sensor’s sensitivity under wide operating
and Temperature Output
temperature range
Automatic Offset Compensation
12-Bit ADC Coupled with Low Noise
AMR Sensors Achieves 2 milli-gauss
Field Resolution
Maximizes sensor’s full dynamic range and resolution
Enables 1° to 2° degree compass heading accuracy
I²C (Standard, Fast, High-Speed modes) High-speed interfaces for fast data communications. I²C up to 3.4
or SPI Digital Interface
MHz and SPI up to 8.0 MHz
Fast 220 Hz Maximum Output Rate
Built-in Self Test
Enables Pedestrian Navigation and LBS Applications
Enables low-cost functionality test after assembly in production
Low Voltage Operations (2.16 to 3.6V)
and Low Power Consumption (100 μA)
Built-In Strap Drive Circuits
Lead Free Package Construction
Wide Magnetic Field Range (+/-8 Oe)
Software and Algorithm Support
Available
Compatible for battery powered applications
Set/reset and offset strap drivers for degaussing, self test, and offset
compensation. Eliminates sensor calibration necessary for other
magnetic sensor technologies.
RoHS Compliance
Sensors can be used in strong magnetic field environments with a 1°
to 2° degree compass heading accuracy
Compassing Heading, Hard Iron, Soft Iron, and Auto Calibration
libraries available
Free Datasheet http://www.Datasheet4U.com
1 page  
HMC5983
MOUNTING CONSIDERATIONS
The following is the recommend printed circuit board (PCB) footprint for the HMC5983.
LAYOUT CONSIDERATIONS
Besides keeping all components that may contain ferrous materials (nickel, etc.) away from the sensor on both sides of
the PCB, it is also recommended that there is no conducting copper under/near the sensor in any of the PCB layers. See
recommended layout below.
I²C Layout Examples: Notice that the one trace under the sensor in the dual supply mode is not expected to carry active
current since it is for pin 4 pull-up to VDDIO. Power and ground planes are removed under the sensor to minimize
possible source of magnetic noise. For best results, use non-ferrous materials for all exposed copper coding.
www.honeywell.com
5
Free Datasheet http://www.Datasheet4U.com
5 Page 
HMC5983
Power Management
This device has two different domains of power supply. The first one is VDD that is the power supply for internal
operations and the second one is VDDIO that is dedicated to IO interface. It is possible to work with VDDIO equal to VDD;
Single Supply mode, or with VDDIO lower than VDD allowing HMC5983 to be compatible with other devices on board.
Communication Bus Interface
This device will be connected to a serial interface bus as a slave device under the control of a master device, such as the
processor. Control of this device is carried out via I²C or SPI interfaces. Use pin 6 (I²C /~SPI) to select between I²C and
SPI interface modes.
I²C Interface
This device is compliant with I²C -Bus Specification, document number: 9398 393 40011. As an I²C compatible device,
this device has a 7-bit serial address and supports I²C protocols. This device supports standard, fast, and high speed
modes, 100kHz, 400kHz, and 3400kHz, respectively. External pull-up resistors are required to support all these modes.
Activities required by the master (register read and write) have priority over internal activities, such as the measurement.
The purpose of this priority is to not keep the master waiting and the I²C bus engaged for longer than necessary.
SPI Interface
This device is compliant with both 4-wire and 3-wire SPI interface standards. Selection 3-wire mode is by setting SIM (SPI
serial interface mode selection) bit (MR2) in mode register to 1. See SPI Communication Protocol section later in this
datasheet for additional details.
Internal Clock
The device has an internal clock for internal digital logic functions and timing management. This clock is not available to
external usage.
H-Bridge for Set/Reset Strap Drive
The ASIC contains large switching FETs capable of delivering a large but brief pulse to the Set/Reset strap of the sensor.
This strap is largely a resistive load. There is no need for an external Set/Reset circuit. The controlling of the Set/Reset
function is done automatically by the ASIC for each measurement. One half of the difference from the measurements
taken after a set pulse and after a reset pulse will be put in the data output register for each of the three axes. By doing
so, the sensor’s internal offset and its temperature dependence is removed/cancelled for all measurements. The set/reset
pulses also effectively remove the past magnetic history (magnetism) in the sensor, if any.
For each “measurement”, the ASIC:
1. Sends a “Set” pulse
2. Takes one measurement (Mset)
3. Sends a “Reset” pulse
4. Takes another measurement (Mreset)
5. Puts the following result in sensor’s data output register:
Output = [Mset – Mreset] / 2
Charge Current Limit
The current that reservoir capacitor (C1) can draw when charging is limited for both single supply and dual supply
configurations. This prevents drawing down the supply voltage (VDD).
www.honeywell.com
11
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