HP203B Datasheet, PDF (4/18 Pages) List of Unclassifed Manufacturers – PRECISION BAROMETER AND ALTIMETER SENSOR

DataSheet
HP203B
*OSR stands for over sampling rate
2.3 Absolute Maximum Rating
Table 4
Parameter
Symbol
Conditions
Min
Max Unit
Overpressure
P_MAX
3
bar
Supply Voltage
V_DD
-0.3
3.6
V
Interface Voltage
V_IF
-0.3
V_DD+0.3
V
Storage Temperature
Range
T_STG
-50
150
℃
Maximum Soldering
Temperature
T_MS
40 second maximum
250
℃
ESD Rating
Human body model
-2
+2
kV
Latch-up Current
At 85℃
-100
100
mA
Stresses above those listed as ‘absolute maximum ratings’ may cause permanent damage to the
device. This is a stress rating only and functional operation of the device under these conditions
is not implied. Exposure to maximum rating conditions for extended periods may affect device
reliability.
3. Function Descriptions
3.1 General Description
The HP203B is a high precision barometer and altimeter that measures the pressure and the
temperature by an internal 24-bit ADC and compensates them by a patented algorithm. The
fully-compensated values can be read out via the I²C interface by external MCU. The uncompensated
values can also be read out in case the user wants to perform their own data compensation. The
devices can also compute the value of altitude according to the measured pressure and temperature.
Furthermore, the device allows the user to setup the temperature, pressure and altitude threshold
values for various events. Once the device detects that a certain event has happened, a
corresponding interrupt will be generated and sent to the external MCU. Also, multiple useful interrupt
options are available to be used by the user.
3.2 Factory Calibration
Every device is individually factory calibrated for sensitivity and offset for both of the temperature and
pressure measurements. The trim values are stored in the on-chip 128-Byte Non-Volatile Memory
(NVM). In normal situation, further calibrations are not necessary to be done by the user.
3.3 Automatic power on initialization
Once the device detects a valid VDD is externally supplied, an internal Power-On-Reset (POR) is
generated and the device will automatically enter the power-up initialization sequence. After that the
device will enter the sleep state. Normally the entire power-up sequence consumes about 400 us.
The user can scan a DEV_RDY bit in the INT_SRC register in order to know whether the device has
finished its power-up sequence. This bit appears to 1 when the sequence is done. The device stays
in the sleep state unless it receives a proper command from the external MCU. This will help to
achieve minimum power consumptions.
HP203B_DataSheet_EN_V2.0
www.hoperf.com
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