HMC5843-EVAL Honeywell Microelectronics & Precision Sensors, HMC5843-EVAL Datasheet - Page 10
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HMC5843-EVAL
Manufacturer Part Number
HMC5843-EVAL
Description
BOARD EVALUATION FOR HMC5843
Manufacturer
Honeywell Microelectronics & Precision Sensors
Datasheet
1.HMC5843.pdf
(21 pages)
Specifications of HMC5843-EVAL
Sensor Type
Magnetic, Digital Compass
Sensing Range
±4g
Interface
I²C
Sensitivity
7 Milli-Gauss
Voltage - Supply
2.5 V ~ 3.3 V
Embedded
No
Utilized Ic / Part
HMC5843
Silicon Manufacturer
Honeywell
Application Sub Type
Magnetic Sensor
Kit Application Type
Sensing - Magnetic / Compass
Silicon Core Number
HMC5843
Sensitivity Range
+/- 10 %
Sensor Terminals
PCB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
342-1072
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HMC5843-EVAL
Manufacturer:
Honeywell Microelectronics & P
Quantity:
135
HMC5843
MAGNETIC MEASUREMENTS
The measurement type is set by bits MS[n] in the configuration registers. There are two main configurations, normal
measurement and bias measurement, where the self-test bias measurement can be a positive or a negative bias current
on the offset strap to emulate an external magnetic field. The gain, GN[n]; the delay, DL[n]; and the data output rate,
DO[n] settings are common to all measurement configurations.
In the normal measurement process, the sensor’s and amplifier’s differential offset are removed through differencing the
sensor’s output after a SET pulse and after a RESET pulse. This technique is not used during the bias measurement
process. The differencing technique is completed as follows: ([Measurement after Set pulse] – [Measurement after Reset
pulse])] / 2.
Normal Measurement
The normal measurement is the default measurement configuration. The normal measurement flow is shown in the
diagram below.
10
MD[n]=0b00 or
Device in idle
MD[n]=0b01
Wait for
mode.
devices: (SVDD, Amp,
Meas1: Measure all 3
Deliver Reset pulse to
Wait. Sensor turn-on
Wait. Sensor turn-on
Enable high current
Deliver Set pulse to
time and delay time
time and delay time
Measurement
Start Normal
MUX, ADC)
channels
sensor
sensor
Normal Measurement Flow Diagram
Device in continuous
measurement mode.
Wait for internally
measurement or
MD[n]=0b01
scheduled
measurement mode, set
Meas2: Measure all 3
Disable high current
(Meas1 - Meas2) / 2
Write Data1 to data
If device in single
output registers
Pin DRDY=0
Pin DRDY=1
Measurement
End Normal
Bit RDY=0
Bit RDY=1
MD[n]=10.
channels
devices
Data1:
www.honeywell.com