HMC1052 Honeywell Microelectronics & Precision Sensors, HMC1052 Datasheet - Page 7

• Manufacturer Part Number: HMC1052
• Description: SENSOR MAGN 2 AXIS 10-MSOP
• Manufacturer: Honeywell Microelectronics & Precision Sensors
• Type: Linearr

Specifications of HMC1052

• Output Type: Differential Voltage
• Sensing Range: ±6g
• Voltage - Supply: 1.8 V ~ 20 V
• Features: Compass - Two Axis
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 10-MSOP
• Supply Voltage: 3V
• Sensitivity Range: 1.2mV/V/G
• Sensor Terminals: Through Hole
• Leaded Process Compatible: No
• Supply Current: 10mA
• Magnetic Field Max: 6G
• Axis Configuration: Two
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Current - Output (max): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 342-1029-2

HMC1051/HMC1052/HMC1053
current of 400mA for reset or set pulses. With rare exception, the set/reset strap must be used to periodically condition the
magnetic domains of the magneto-resistive elements for best and reliable performance.
A set pulse is defined as a positive pulse current entering the S/R+ strap connection. The successful result would be the
magnetic domains aligned in a forward easy-axis direction so that the sensor bridge’s polarity is a positive slope with
positive fields on the sensitive axis result in positive voltages across the bridge output connections.
A reset pulse is defined as a negative pulse current entering the S/R+ strap connection. The successful result would be
the magnetic domains aligned in a reverse easy-axis direction so that sensor bridge’s polarity is a negative slope with
positive fields on the sensitive axis result in negative voltages across the bridge output connections.
Typically a reset pulse is sent first, followed by a set pulse a
few milliseconds later. By shoving the magnetic domains in
completely opposite directions, any prior magnetic disturbances
are likely to be completely erased by the duet of pulses. For
simpler circuits with less critical requirements for noise and
accuracy, a single polarity pulse circuit may be employed (all
sets or all resets). With these uni-polar pulses, several pulses
together become close in performance to a set/reset pulse
circuit. Figure 1 shows a quick and dirty manual pulse circuit for
uni-polar application of pulses to the set/reset strap.
APPLICATION NOTES
Low Cost 2-Axis Compass
Very high precision measurements can be made using the HMC105X family of sensors when interfaced with low noise
amplifiers and 12 to 16-bit Analog-to-Digital (A/D) converters. For lower resolution (3° accuracy or more) or low cost
compass applications, 8 or 10-bit A/D converters may be used with general purpose operational amplifiers. Figure 2
shows a typical 2-axis compassing application using readily available off-the-shelf components.
The basic principle of two-axis compassing is to orient the two sensor bridge elements horizontal to the ground
(perpendicular to the gravitational field) and to measure the resulting X and Y analog output voltages. With the amplified
sensor bridge voltages near-simultaneously converted (measured) to their digital equivalents, the arc-tangent Y/X can be
computed to derive the heading information relative to the X-axis sensitive direction. See the application notes on
compassing at Honeywell Magnetic Sensors website (www.magneticsensors.com) for basic principles and detailed
application information.
www.honeywell.com
2.5 to 3.6v
2.5 to 3.6v
Vcc
Vcc
set/reset
set/reset
offset
offset
U1
U1
HMC1052
HMC1052
.1uf
.1uf
5.00k
5.00k
5.00k
5.00k
5.00k
5.00k
5.00k
5.00k
(2) IRF7509
(2) IRF7509
500k
500k
500k
500k
1nf
1nf
1nf
1nf
Vref/2
Vref/2
Vref/2
Vref/2
LMV358
LMV358
LMV358
LMV358
U4
U4
U5
U5
500k
500k
500k
500k
5 volts
5 volts
U2
U2
set/reset
set/reset
_set/reset
_set/reset
1
1
0
0
MAX1118
MAX1118
U3
U3
Vref
Vref
Set Pulse Circuit
Two-Axis Compass
Figure 1
Figure 2
enable
enable
data_out
data_out
clk_in
clk_in
Iset
Iset
7