TruStability™ HSC & SSC Series Silicon Pressure Sensors

TruStability™ HSC & SSC Series Silicon Pressure Sensors
Source: Honeywell

Introduction
Purpose
To introduce HSC and SSC series silicon pressure sensors, its key features and applications.
Outline
Silicon pressure sensors basics
HSC & SSC series overview
Key features
Part numbering
Application example
Content
12 pages

Silicon Pressure Sensors Basics
Gage factor 100 times greater than wire strain gages
Piezoresistors implanted into silicon medium
Integrated into silicon force-sensing member
Perfect crystal, returns to original shape
Better than metal for pressure-sensing diaphragms
Extremely good elasticity
Fail only by rupturing
Compact, rugged, reliable

Honeywell Silicon Pressure Sensor Structure
Square silicon chip
Integral sensing diaphragm
Four piezoresistors
Diaphragm flexes under pressure
Resistance changes
Low-level output voltage proportional to pressure
Gold pads connect silicon chip surface to piezoresistors
Wire leads bond to gold pads
Diaphragm formed by etching square cavity

Why TruStability ™?
Helps prevent drift over time or from temperature and humidity extremes
Eliminates the customer's need to calibrate after mounting to the PCB, and also the need for the end-user to calibrate the device
Temperature compensated and calibrated to provide an extremely tight accuracy specification
Modular and flexible design offers a wide variety of package styles and options, all with the same industry-leading performance specifications
Accuracy Stability Flexibilty

HSC & SSC Overview
Industry leading long-term stability
Extremely tight accuracy of ±0.25 % FSS BFSL
Low operating voltage
Extremely low power consumption
Ratiometric 12-bit analog output
Virtually insensitive to mounting direction
Internal diagnostic functions increase system reliability
Absolute, differential, gage, and compound types
Custom calibration available
Various pressure port options
RoHS compliant

Target Applications
Medical
Airflow monitors
Anesthesia machines
Blood analysis machines
Gas chromatography
Gas flow instrumentation
Kidney dialysis machines
Oxygen concentrators
Pneumatic controls
Respiratory machines
Sleep apnea equipment
Ventilators
Industrial
Barometry
Flow calibrators
Gas chromatography
Gas flow instrumentation
HVAC
Life sciences
Pneumatic controls

Types of Pressure Sensor Measurement
Absolute (Port 2)
Port 2 sealed at zero atmospheres
Pressure applied to P1 port
Pressure deflects diaphragm, producing voltage change
Differential (Port1 – Port2)
Difference between two pressure
Pressure applied to both ports
Change in differential leads to change in voltage
Gage (P2 – Atmospheric Pressure)
Ambient atmospheric pressure used as reference
P1 port vented to atmospheric pressure
Measured pressure applied to P2 port

Key Parameters HSC SSC Pressure range 1psi to 150psi 1psi to 150psi Accuracy ± 0.25% FSS BFSL ± 0.25% FSS BFSL Total Error Band ± 1% FSS ± 2% FSS Compensated Temperature Range 0 º C ~ 50 º C -25 º C ~ 85 º C Output Accuracy 12 bit 12 bit Response Time 0.46ms 1ms

Part Numbering HSC M RN N 001BG 2 A 5 Series Package M: SMT D: DIP Pressure Port NN : flat covers AN : Axial, single port RN : Radial, single port RR : Radial, dual port on same side DR : Radial, dual port on both side Diagnostics D : Diagnostics N : No diagnostics Pressure Range Output Type A : Analog voltage S : SIP 2 : I 2 C, 0x28 3 : I 2 C, 0x23 4 : I2C, 0x48 5 : I2C, 0x58 6 : I2C, 0x68 7 : I2C, 0x78 Supply Voltage 3 : 3.3V 5 : 5V Transfer Function A : 10% to 90% of Vsupply B : 5% to 95% of Vsupply

Application Example – Hemodialysis Machine

Additional Resource
For ordering HSC & SSC Pressure Sensors, please click the part list or
Call our sales hotline
For more product information go to
http://sensing.honeywell.com/index.cfm?Ne=2308&ci_id=154348&N=3383&la_id=1
Visit Element 14 to post your question
www.element-14.com
For additional inquires contact our technical service hotline or even use our “Live Technical Chat” online facility
Newark 1 Farnell Newark 2

TruStability™ HSC & SSC Series Silicon Pressure Sensors

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