Features Applications
n Compensated digital output Industrial:
n HVAC systems
n Ultra-low pressure sensing
n Process monitoring
2
n Digital CI output
n Packaging automation
n Gauge and differential types
**Medical Devices (low/medium risk):
n For use in clean, dry air and non-corrosive
n Diagnostic equipment
gas environments
n Analysis equipment
n RoHS compliant*
BPS120 Series - 12 mm Digital Low Pressure Sensor
Electrical Characteristics
Supply Voltage (V ) ............................................................................................................................ 2.7 V minimum, 5 V typical, 5.5 V maximum
s
Supply Current @ 5 V ................................................................................................................1.2 mA minimum, 2 mA typical, 3.5 mA maximum
Performance Characteristics
Operating Temperature ................................................................................................................................... -40 C to +85 C (-40 F to +185 F)
Storage Temperature ....................................................................................................................................-55 C to +100 C (-67 C to +212 F)
Pressure Range......................................................................................0.15 to 1.0 psi (10.3 to 68.9 mbar; 1.03 to 6.89 KPa; 4.2 to 27.7 in H2O)
2 (1)
Output ..................................................................................................................................................................................................Digital I C
Effective ADC Resolution ................................................................................................................................................................................13 bit
Accuracy @ 25 C .................................................................................................................................................................................0.25 % FS
Total Error Band over 0 C to 60 C (+32 F to +140 F) ........................................................................................................................ 1.5 % FS
Long Term Stability ................................................................................................................................................................................. 0.5 % FS
Startup Time .................................................................................................................................................................................. 15 ms maximum
Digital Update Time ............................................................................................................................................................................8.5 ms typical
Proof Pressure....................................................................................................................................................................... 5X full scale pressure
Burst Pressure ................................................................................................................................................................................................ 10 psi
(1) 2
I C address is set to (0x28). Alternative addresses are available. Consult the factory for custom options.
Product Characteristics
Media Compatibility .........................................................................................................................................................Non-corrosive dry gasses
Moisture Sensitivity Level .......................................................................................................................................................................................1
ESD Classification (HBM) ..................................................................................................................................................................................2 kV
Marking ..................................................................................Partial model number, media compatibility, pressure type, pressure rating, lot code
Standard Packaging ............................................................................................................................................................... 250 pcs./13-inch reel
Weight .................................................................................................................................................................................1.307 grams (0.046 oz)
Transfer Function Formula Basic Circuit Schematic
P 0.1 Max 1
counts
P = (P P ) + P
psi max min min
( )
0.8 Max
V
s
Where
P = Measured Pressure in PSI
psi
P = Pressure Counts
counts
SCL
8
DIGITAL
P = Minimum Pressure
min
OUT
SDA 7
P = Maximum Pressure
max
SSC
Max = 16384 = 14 Bits
Consult factory for custom options such as supply voltage,
GND
temperature calibration range, output range accuracy
specification, and update rate.
4
Note: Power supply decoupling included.
* RoHS3 Directive 2015/863 Amendments of Annex II on March 31, 2015
** Bourns products have not been designed for and are not intended for use in lifesaving, life-critical or life-sustaining applications nor any other applications
where failure or malfunction of the Bourns product may result in personal injury or death. See Legal Disclaimer Notice on the last page of this document, and at
www.bourns.com/docs/legal/disclaimer.pdf.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.BPS120 Series - 12 mm Digital Low Pressure Sensor
3312 - 2 mm SMD Trimming Potentiometer
2
I C Parameters
SCL Clock Frequency f ...............................................................................................................................................................100 to 400 kHz
SCL
Start Condition Hold Time Relative to SCL Edge t ...............................................................................................................................0.1 s
HDSTA
1
Minimum SCL Clock Low Width t ..........................................................................................................................................................0.6 s
LOW
1
Minimum SCL Clock High Width t .........................................................................................................................................................0.6 s
HIGH
Start Condition Setup Time Relative to SCL Edge t .............................................................................................................................0.1 s
SUSTA
Data Hold Time on SDA Relative to SCL Edge t ..................................................................................................................................0.0 s
HDDAT
Data Setup Time on SDA Relative to SCL Edge t ................................................................................................................................0.1 s
SUDAT
Stop Condition Setup Time on SCL t ...................................................................................................................................................0.1 s
SUSTO
Bus Free Time Between Stop Condition and Start Condition t ...................................................................................................................2 s
BUS
1
Combined low and high widths must equal or exceed minimum SCLK period.
2
I C Parameters
2
I C Communication
Communication to the Model BPS120 is read only. To read the pressure counts, the master performs a read request by asserting a start
condition, sending the 7-bit address of the part (0x28), and sets the read/write bit. The master then waits for an acknowledgement. The
acknowledgement is sent by the pressure sensor along with 2 bits of status and bits 13:8 of the pressure counts, the master acknowledges the
first 8 bits, and the pressure sensor sends the remaining 8 bits of data. The master then does not acknowledge and sends a stop condition,
signaling the end of the transaction.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.