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HMC1051 데이터시트 PDF




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부품번호 HMC1051 기능
기능 (HMC1051 / HMC1052) 1 AND 2-AXIS MAGNETIC SENSORS
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HMC1051 데이터시트, 핀배열, 회로
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HMC1051 / HMC1052
SENSOR PRODUCTS
Features
1 AND 2-AXIS MAGNETIC SENSORS
· Small 8-Pin SIP or 10-Pin MSOP Packages
· Two AMR Bridges in One Package
· Wide Field Range of +/- 6 Gauss
· 1.0 mV/V/gauss Sensitivity
· High Accuracy Compassing (Error <0.01°)
· Low Power Operation Down to 1.8V
· Patented On-chip Set/Reset Straps
Product Description
The Honeywell HMC1051Z and HMC1052 are high
performance magnetoresistive sensor designs on a
single chip. The advantages of these patented chips
include perfectly orthogonal two-axis sensing
(HMC1052), ultra small size and low power capability in
miniature surface mount packages.
Each of the magnetoresistive sensors are configured
as a 4-element wheatstone bridge to convert magnetic
fields to differential output voltages. Capable of sensing
fields below 0.1 milligauss, these sensors offer a
compact, low cost, high sensitivity and highly reliable
solution for low field magnetic sensing.
APPLICATIONS
· Compassing
· Navigation Systems
· Attitude Reference
· Traffic Detection
· Medical Devices
· Position Sensing
Web Sites:
www.magneticsensors.com
www.ssec.honeywell.com
2001 HMC1051/1052 Published Jul 2001 Page 1
DataSheet4 U .com
HMC1052 Circuit Diagram
Honeywell
Solid State Electronics Center
12001 State Highway 55
Plymouth, Minnesota 55441-4799
1-800-323-8295




HMC1051 pdf, 반도체, 판매, 대치품
www.DataSheet4U.com
HMC1051 / HMC1052
Basic Device Operation
SENSOR PRODUCTS
The HMC1051 and HMC1052 are single-axis and two-axis linear magnetic sensors designed as a Wheatstone
bridges formed by a magnetoresistive metal film. With the power supply applied to the bridge, the sensors converts
any incident magnetic field in the sensitive direction to a balanced voltage output. The magnetoresistive sensors are
made of a nickel-iron (Permalloy) thin-film deposited on a silicon wafer in pattern of resistive strips. In the presence of
a magnetic field, a change in the bridge resistive elements causes a corresponding change in voltage across the
bridge outputs.
In addition to the bridge circuits, the sensors each have two on-chip magnetically coupled straps; the Offset Strap and
the Set/Reset Strap. The patented straps eliminate the need for external coils surrounding the bridge elements. The
offset strap (available on bare die only) allows for several modes of operation when a direct current is driven through
it. These modes are: 1) Subtraction of an unwanted magnetic field, 2) Zero-ing of the bridge offset voltage, 3) Closed
loop field cancellation, and 4) Auto-calibration of bridge gain. The set/reset strap can be pulsed with high currents for
the following benefits: 1) Enable the sensor to perform high sensitivity measurements, 2) Flip the polarity of the bridge
output voltage, and 3) Periodically used to improve linearity, lower cross-axis effects, and temperature effects.
Application Notes
Low Cost 2-Axis Compass
Very high precision measurements can be made using the HMC1051 and HMC1052 sensors when interfaced with
low noise amplifiers and 12 to 16-bit Analog-to-Digital (A/D) converters. For lower resolution (1°) or low cost compass
applications, 8 or 10-bit A/D converters may be used with general purpose operational amplifiers. Figure 1 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 sensor bridge element horizontal to the ground
(perpendicular to the gravitational field) and to measure the X and Y analog 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. See the application notes on compassing at Honeywell Magnetic Sensors website
(www.magneticsensors.com) for basic principles and detailed application information.
Vcc
2.5 to 3.6v
U1
HMC1052
set/reset
offset
Figure 1
1nf
500k
5.00k
LMV358
5.00k
500k
Vref/2
U2
1nf 500k
U3
1
MAX1118
0
5.00k
LMV358
5.00k
500k
Vref/2
.1uf U4
(2) IRF7507 U5
Vref
set/reset
_set/reset
enable
data_out
clk_in
Web Sites:
www.magneticsensors.com
www.ssec.honeywell.com
2001 HMC1051/1052 Published Jul 2001 Page 4
DataSheet4 U .com
Honeywell
Solid State Electronics Center
12001 State Highway 55
Plymouth, Minnesota 55441-4799
1-800-323-8295

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HMC1051 전자부품, 판매, 대치품
www.DataSheet4U.com
HMC1051 / HMC1052
SENSOR PRODUCTS
Three Axis Compassing with Tilt Compensation
For full three-axis compassing, the circuit depicted in Figure 6 shows both a HMC1051Z and a HMC1052 used for
sensing the magnetic field in three axes. A two-axis accelerometer is also shown to provide pitch and roll (tilt)
sensing to correct the three-axis data into to the corrected two-axis heading. The accelerometer can be substituted
with a fluidic 2-axis tilt sensor if desired. For lower voltage operation with Lithium battery supplies (2.5 to 3.6Vdc), the
Set/Reset circuit should be upgraded from a single IRF7507 to the dual IRF7507 implementation to permit a
minimum 1.0 ampere pulse (0.5 ampere per set/reset strap resistance) to both the HMC1052 and HMC1051 sensors.
Vcc
3.3 to 5.0v
U1
HMC1052
Figure 6
1nf
500k
5.00k
LMV324
5.00k
500k
U3
Vcc/2
1nf 500k
set/reset
offset
5.00k
LMV324
5.00k
500k
Vcc/2
.1uf U4
IRF7507
set/reset
Vcc .1mf 500k
U2
5.00k
5.00k
500k
- LMV324
+
Vcc/2
HMC1051
Vcc
Vcc/2
AN0
AN1
AN2
AN3
set/reset DO0
U6
Vcc
U5
mC
with
Multiplexed
A/D Conv.
Two-axis
accelerometer
xout
yout
DI0
DI1
Duty Cycling for Lower Energy Consumption
For battery powered and other applications needing limited energy consumption, the sensor bridge and support
electronics can be switched “off” between magnetic field measurements. The HMC1051Z and HMC1052 are very low
capacitance (Bandwidth > 5MHz) sensor bridges and can stabilize typically before the support electronics can. Also
minimizing the quantity of set/reset pulses will save energy too. Figure 7 shows a simple supply switching circuit that
can be microprocessor controlled to duty cycle (toggle) the electronics in moderate current (<25mA) applications.
Web Sites:
www.magneticsensors.com
www.ssec.honeywell.com
2001 HMC1051/1052 Published Jul 2001 Page 7
Honeywell
Solid State Electronics Center
12001 State Highway 55
Plymouth, Minnesota 55441-4799
1-800-323-8295
DataSheet4 U .com

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