HMR3100 Honeywell International's Solid State Electronics Center (SSEC), HMR3100 Datasheet - Page 2

• Manufacturer Part Number: HMR3100
• Description: Digital Compass Solution
• Manufacturer: Honeywell International's Solid State Electronics Center (SSEC)

HMR3100
SPECIFICATIONS
Characteristics
Heading
Magnetic Field
Electrical
Digital Interface
Physical
Environment
Circuit Description
The HMR3100 Digital Compass Solution circuit board includes the basic magnetic sensors and electronics to provide
a digital indication of heading. The HMR3100 has a Honeywell HMC1022 two-axis magnetic sensor on board. The
HMR3100 allows users to derive compassing (heading) measurements when the board is in a reasonably horizontal
(flat) position.
The HMR3100 circuit starts with the HMC1022 two-axis magnetic sensors providing X and Y axis magnetic sensing
of the earth’s field. These sensors are supplied power by a switching transistor to conserve power with battery
operated products. The sensor output voltages are provided to a dual operational amplifier and then to analog to
digital converters (ADC) onboard a microcontroller (2C) integrated circuit. The microcontroller integrated circuit
periodically samples the amplified sensor voltages, performs the offset corrections, and computes the heading. This
microcontroller also performs the external serial data interface and other housekeeping functions such as the
calibration routine.
The power supply for the HMR3100 circuit board is to be about a +3 to +5 volt range allowing the user to provide a
single lithium battery to logic level supply voltages. The power supply architecture is a single ground system for
single ended supply sources (+ and ground return).
Solid State Electronics Center • www.magneticsensors.com • [phone] • Page 2
Accuracy
Resolution
Repeatability
Range
Resolution
Input Voltage
Current
USART
Update Rate
Connector
Dimensions
Weight
Temperature
Normal Mode (Average 1Hz Sampling)
Maximum Magnetic Flux Density
Circuit Board Assembly
Continuous or Polled
USART 9600.N.8.1
8-Pin Wide DIP
Unregulated
Sleep Mode
Conditions
Calibration
Operating
Storage
Level
2400
Min
2.6
0.1
6.1
-40
0
-
19 x 19 x
9600
Typ
H 5
0.5
H 3
H 2
0.2
7.3
4.5
1.5
2
6
3
-
-
19200
+110
Max
17.3
+70
0.5
20
5
1
SENSOR PRODUCTS
milli-gauss
deg RMS
volts DC
grams
gauss
Units
Baud
deg
deg
mm
mA
mA
2A
Hz
°C
°C
-