HMC1052 Honeywell Microelectronics & Precision Sensors, HMC1052 Datasheet - Page 9

• 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
Alternating or Direct Current Sensing
The HMC105X family sensors can be utilized in a novel way for moderate to high current sensing applications using a
nearby external conductor providing the sensed magnetic field to the bridge. Figure 6 shows a HMC1051Z used as a
current sensor with thermistor element performing a temperature compensation function for greater accuracy over a wide
range of operational temperatures. Selection of the temperature compensation (tempco) resistors used depends on the
thermistor chosen and is dependant on the thermistor’s %/°C shift of resistance. For best op-amp compatibility, the
thermistor resistance should be above about 1000 ohms. The use of a 9-volt alkaline battery supply is not critical to this
application, but permits fairly common operational amplifiers such as the 4558 types to be used. Note that the circuit
must be calibrated based on the final displacement of the sensed conductor to the measuring bridge. Typically, an
optimally oriented measurement conductor can be placed about one centimeter away from the bridge and have
reasonable capability of measuring from tens of milliamperes to beyond 20 amperes of alternating or direct currents. See
application note AN-209 for the basic principles of current sensing using AMR bridges.
www.honeywell.com
I
I
ac
ac
Current Measured
Current Measured
Conductor to be
Conductor to be
I
I
dc
dc
Vcc
Vcc
5.0v
5.0v
Vcc = 9Vdc
Vcc = 9Vdc
standoff distance
standoff distance
set/reset
set/reset
offset
offset
set/reset
set/reset
offset
offset
U1
U1
HMC1051
HMC1051
U1
U1
HMC1051
HMC1051
.1uf
.1uf
*
*
Low ESR Tantalum
Low ESR Tantalum
FMMT717
FMMT717
FMMT617
FMMT617
5.00k
5.00k
5.00k
5.00k
1 f*
1 f*
-
-
5.00k
5.00k
5.00k
5.00k
500k
500k
+
+
500k
500k
.1uf
.1uf
Vcc/2 ~ +4.5Vdc
Vcc/2 ~ +4.5Vdc
.1 f
.1 f
Vcc/2
Vcc/2
Vcc
Vcc
-
-
+
+
TLC072
TLC072
.1 f
.1 f
200
200
10k
10k
10k
10k
-
-
+
+
*
*
RC4558
RC4558
Low ESR Tantalum
Low ESR Tantalum
500k
500k
0.1 f
0.1 f
0.1 f
0.1 f
U2
U2
500k
500k
1 f*
1 f*
-
-
Si1553DL
Si1553DL
+
+
10k
10k
set/reset
set/reset
Vcc
Vcc
R
R
U2
U2
b
b
Threshold Set
Threshold Set
Vcc =9Vdc
Vcc =9Vdc
Magnetic Field Detector
10k pot
10k pot
U3
U3
200
200
-
-
+
+
TLC072
TLC072
tempco
tempco
network
network
-
-
+
+
S
S
RC4458
RC4458
Figure 5
R
R
th
th
R
R
Current Sensor
R
R
a
a
Figure 6
set/reset
set/reset
output
output
R
R
LED
LED
LED
LED
output
output
9