HMC5843 Honeywell Microelectronics & Precision Sensors, HMC5843 Datasheet - Page 12

• Manufacturer Part Number: HMC5843
• Description: Magnetic Sensor
• Manufacturer: Honeywell Microelectronics & Precision Sensors

Specifications of HMC5843

• Msl: MSL 3 - 168 Hours
• Sensitivity Range: +/- 10 %
• Sensor Terminals: PCB
• Magnetic Field Max: 4G
• Axis Configuration: Three
• Sensor Output: Digital

HMC5843
Self-Test Bias Measurement
The self-test bias measurement flow is shown in the diagram below.
The timing diagram for both the bias measurement is shown below. “Bias Meas” defines the timing of figure below. When
the device is in continuous-measurement mode, the time shown as “Idle” defines time the device is in low current state
similar to idle mode. When the device is in single-measurement mode, the time shown as “Idle” defines the time the
device is in sleep mode. Analog Turn-on time defines the longest of these times: the sensor’s turn-on time, the amplifier
turn-on time, or the ADC turn-on time. I(R_S/R) depicts the current through the sensor set/reset strap, R
12
MD[n]=0b00 or
Device in idle
MD[n]=0b01
Wait for
mode.
devices: (SVDD, Amp,
Meas1: Measure all 3
Wait. Sensor turn-on
Wait. Sensor turn-on
Apply bias current to
Enable high current
Deliver Set pulse to
time and delay time
time and delay time
Measurement
MUX, ADC)
Start Bias
channels
sensor.
sensor
Self-Test Bias Measurement Flow Diagram
Device in continuous
measurement mode.
Wait for internally
measurement or
MD[n]=0b01
scheduled
measurement mode, set
Data1: Meas2 - Meas1
Meas2: Measure all 3
Disable high current
If device is in single
Write Data1 to data
output registers
Pin DOUT=0
Pin DOUT=1
Measurement
Bit RDY=1
Bit RDY=0
MD[n]=10.
End Bias
channels
devices
www.honeywell.com
S/R
.