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Hope RF

HP03

BAROMETER MODULE
2007-1-17

Version: 1.1

. Integrated pressure sensor
. Pressure Range 300-1100hpa
. 16 Bit Σ−Δ ADC
. 11 coefficients for software compensation
stored on chip
. I2C Serial Interface
. One system clock line (32768Hz)
. One hardware controlled reset line
. Low voltage, low power
Description
The HP03 pressure module includes a piezo-resistivepressure sensor and an ADC
interface. It provides 16 bit word data for pressure and temperature related voltage. With
the help of a highly accurate calibration of the senor, 11 unique coefficients were stored
on the chip, thus accurate pressure and temperature reading can be realized. HP03 is a
low power, low voltage device with automatic power down switching. I2C Serial
Interface is used forcommunications with a microprocessor. Sensor packaging options
are DIP or SMD (with metal cap)
Features
. 15 Bit ADC resolution
. Supply voltage 2.2v-3.6v
. -30°C to + 80°C operating range
Applications
. Pressure measurement and control systems
. Mobile altimeter/barometer systems
. Weather forecast products
. Adventure or multi-mode watches
Block Diagram

1

Hope RF

HP03BAROMETER MODULE
2007-1-17

Version: 1.1

Pin Name
VSS
VDD
MCLK
XCLR
SDA

Pin Number
1
2
3
4
5

Type
G
P
I
I
I/O

Function
power ground
power VCC
master clock(32k) input
ADC reset input (keep low when system is in idle state)
. I²C data input and output

SCL

6

I

I2C clock input

* XCLR is to reset the AD converter (active low). XCLR should be set to high onlyduring AD conversion
phase(reading D1,D2), at all other states, such as reading calibration factors, this pin should be kept
low.

Absolute Maximum Ratings
Parameter
Supply Voltage
Over pressure

Symbol
VDD
P

Min
-0.3

Max
4
15

Unit
V
Bar(abs)

Storage Temperature

Tstg

-30

90

°C

Recommended Operating Conditions
Parameter
Supply Voltage
Supply CurrentSymbol
VDD
I

Conditions

Min
2.2

Typ
3

Max
3.6

Unit
V
V

VDD=3V

during conversion

μΑ
μΑ

500

stand by
Operating Pressure Range
Operating Temperature Range
Conversion Time
Duty Cycle of MCLK
Serial Date Rate

1
P

100

T
T

1100

-30

80
35
60%
500

25

MCLK=32k
40%

50%

SCL

hpa (abs)
ms
%
KHZ

°C

Pressure and TemperatureOutput Characteristics
With the calibration data provided by the HP03 system, it should be able to reach the
following characteristics:
Parameter
Resolution
Accuracy
Absolute Pressure
Accuracy
Maximum Error Over
Temperature
Long Term Stability
VDD Dependency
Temperature Accuracy

2

Symbol

Conditions
750-1100

Min
0.1
-0.5

750-1100
-30~+79
12 month
2.4~3.6

0.5Unit
hpa
hpa

-1.5

1.5

hpa

-2.5

2.5
1.5

hpa
hpa
hpa

0.8

°C

-1.5
-0.8

Typ

2
0

Max

Hope RF

HP03

BAROMETER MODULE
2007-1-17

Version: 1.1

Pressure and Temperature Measurement
The main function of HP03 system is to convert the uncompensated pressure and
temperature signal from a pressure sensor. After the conversion, the following two valuescan be obtained:
. measured temperature
“D2”
. measured pressure
“D1”
As the sensor is strongly temperature dependent, it is necessary to compensate for these
effects. Therefore 10 sensor-specific coefficients are stored on the HP03 at our
manufacturing facility, and they allow an accurate software compensation in the
application.
The 7 coefficients are:
. Sensitivity coefficient
.Offset coefficient
. Temperature Coefficient of Sensitivity
. Temperature Coefficient of Offset
. Reference Temperature
. Temperature Coefficient of Temperature
. Offset Fine Tuning

“C1”
“C2”
“C3”
“C4”
“C5”
“C6”
“C7”

4 sensor parameter
. Sensor Specific Parameter

“A,B,C,D”

Parameter Range(Hex:Dec)
C1
C2
C3
C4
C5
C6
C7

0x100 -- 0x7FFF
0x00 -- 0x1FFF
0x00 -- 0x400...
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