HMC6042 Datasheet, PDF (5/7 Pages) Honeywell Solid State Electronics Center – 2-Axis Magnetic Sensor Circuit

HMC6042
substrate. Irons with a tip temperature no greater than 315°C should be used. Excessive rework risks the copper pads
pulling away into the molten solder.
SCHEMATIC DIAGRAM
HMC6042
VDD1
AMR
IN X+
IN X-
GND
AMR
GND
IN Y+
IN Y-
HMC6042
G
OUT X
FB X
VDD1
GND
GND
OUT Y
G
FB Y
AN0
CLK
AN1
TXD
AN2
RXD
DO0
Host µC
SERIAL
I/O
Vdd
Vss
VDD
GND
IN Z+
IN Z-
OUT Z
G
FB Z
+ ^2.2µF
C1
SET/RESET
S/R+ S/R-
S/R C
C2
0.22µF
S/R IN
VDD2
BASIC DEVICE OPERATION
The Honeywell HMC6042 magnetoresistive sensor circuit is a pair of sensor and analog support circuits to measure
magnetic fields. With power supply applied, the sensor converts any incident magnetic field in the sensitive axis direction
to a differential voltage output. In addition to the bridge circuit, the sensors have two on-chip magnetically coupled straps;
the offset strap and the set/reset strap. These straps are Honeywell patented features for incident field adjustment and
magnetic domain alignment; and eliminate the need for external coils positioned around the sensors.
The magnetoresistive sensors are made of a nickel-iron (Permalloy) thin-film deposited on a silicon wafer and patterned
as a resistive strip element. In the presence of a magnetic field, a change in the bridge resistive elements causes a
corresponding change in voltage across the bridge outputs.
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