HMC1051Z-RC Honeywell Microelectronics & Precision Sensors, HMC1051Z-RC Datasheet - Page 10

• Manufacturer Part Number: HMC1051Z-RC
• Description: SENSOR MAGNETIC 1 AXIS 8-SIP
• Manufacturer: Honeywell Microelectronics & Precision Sensors
• Type: Linearr

Specifications of HMC1051Z-RC

• Sensing Range: ±6g
• Voltage - Supply: 1.8 V ~ 20 V
• Output Type: Differential Voltage
• Features: Compass - One Axis
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8 Pin SIP
• Supply Voltage Range: 1.8 To 20 V
• Sensor Case Style: SIP
• Sensitivity Range: 1.2mV/V/G
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +125°C
• Sensor Output: Voltage
• Terminal Type: PCB Thru Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Current - Output (max): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 342-1060; HMC1051Z-RC

HMC1051/HMC1052/HMC1053
Three Axis Compassing with Tilt Compensation
For full three-axis compassing, the circuit depicted in Figure 7 shows both a HMC1051 and a HMC1052 used for sensing
the magnetic field in three axes. Alternatively a single HMC1053 could be used for a single sensor package design. A
two-axis accelerometer with digital (PWM) outputs is also shown to provide pitch and roll (tilt) sensing, to correct the
three-axis magnetic sensors outputs into to the tilt-compensated 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 (per Figure 2) to permit
a minimum 1-ampere pulse (500mA per set/reset strap resistance) to both the HMC1052 and HMC1051 sensors.
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 HMC105X family of magnetic sensors are
very low capacitance (Bandwidth > 5MHz) sensor bridges and can stabilize quickly, typically before the support
electronics can. Other energy saving ideas would be to minimize the quantity of set/reset pulses which saves energy over
the battery life. Figure 8 shows a simple supply switching circuit that can be microprocessor controlled to duty cycle
(toggle) the electronics in moderate current (<25mA) applications.
10
3.3 to 5.0v
3.3 to 5.0v
Vcc
Vcc
Vcc
Vcc
set/reset
set/reset
set/reset
set/reset
offset
offset
U1
U1
HMC1052
HMC1052
HMC1051
HMC1051
U2
U2
.1uf
.1uf
5.00k
5.00k
5.00k
5.00k
5.00k
5.00k
5.00k
5.00k
5.00k
5.00k
5.00k
5.00k
IRF7509
IRF7509
500k
500k
500k
500k
500k
500k
Three Axis Compass
1nf
1nf
1nf
1nf
.1 f
.1 f
Vcc/2
Vcc/2
Vcc/2
Vcc/2
Vcc/2
Vcc/2
-
-
+
+
LMV324
LMV324
LMV324
LMV324
U4
U4
LMV324
LMV324
Figure 7
U3
U3
500k
500k
500k
500k
500k
500k
Vcc
Vcc
accelerometer
accelerometer
Two-axis
Two-axis
yout
yout
xout
xout
Vcc/2
Vcc/2
U5
U5
Vcc
Vcc
set/reset
set/reset
DO0
DO0
AN0
AN0
AN1
AN1
AN2
AN2
AN3
AN3
DI0
DI0
DI1
DI1
Multiplexed
Multiplexed
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A/D Conv.
A/D Conv.
with
with
U6
U6
C
C