DataSheet

HP203B

HP203B_DataSheet_EN_V2.0

www.hoperf.com

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*OSR stands for over sampling rate

2.3 Absolute Maximum Rating

Table 4

Parameter

Symbol

Conditions

Min

Max

Unit

Overpressure

3

bar

Supply Voltage

-0.3

3.6

V

Interface Voltage

-0.3

V

Storage Temperature

Range

-50

150

℃

Maximum Soldering

Temperature

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.