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DATASHEET

Pressure sensor family

last update

December 6, 2011

reference

SPD-dil family

page

1/5

Smartec Pressure Sensor

(bridge output)

Features

* Commercial grade

* DIP version for high volume production

* Gauge or absolute pressure

* Resistive bridge technology

* Voltage or current excitation

Applications

* Medical applications

* Blood pressure

* Portable Gauges

* Process control

* HVAC controls

Product description

The Smart Pressure Device SPD series of pressure sensors are silicon based and

encapsulated in modified plastic Dual In Line packages, to accommodate six pins for through-

board printed circuit mounting.

The sensors come in two distinct types: Gauge and absolute. The gauge type merely

measures the pressure with respect to the atmospheric pressure. The absolute type contains

a reference vacuum chamber, which is formed on the die during manufacturing.

The output voltages of both types are proportional to the pressure that is measured.

Various pressure ranges are available. On request, other ranges and encapsulations can be

supplied. Please contact our sales department for more information.

Because of its bridge resistance value, the SPD pressure sensor is especially suited for use

in combination with the Universal Transducer Interface (UTI03), which gives an easy and

very accurate interface to a digital environment.

Summary of content (5 pages)

PAGE 1
last update DATASHEET December 6, 2011 Pressure sensor family reference SPD-dil family page 1/5 Smartec Pressure Sensor (bridge output) Features * Commercial grade * DIP version for high volume production * Gauge or absolute pressure * Resistive bridge technology * Voltage or current excitation Applications * Medical applications * Blood pressure * Portable Gauges * Process control * HVAC controls Product description The Smart Pressure Device SPD series of pressure sensors are silicon based and enc
PAGE 2
last update December 6, 2011 SPD series pressure sensor reference SPD-dil family page 2/5 SPD bridge series Performance Characteristic (Measured @5V excitation and 25 °C.) Parameter Excitation voltage Excitation current Offset Linearity Bridge Impedance TC Span (0-50 °C) TC Offset (0-50 °C) TC bridge resistance Hysteresis Repeatability 1) Response time (10-90%) Pressure overload Operating temperature Storage temperature Min 0 -50 -0,3 2.7 -27 -7 23 Typ Max Units. 5 1,5 0 ±0,1 3.
PAGE 3
last update December 6, 2011 SPD series pressure sensor reference SPD-dil family page 3/5 Understanding the specifications The available range of SPD series pressure sensors allows for a wide range of applications. In order to get good results, it is very important to fully understand the meaning of the various specifications and their effects on accuracy, especially the ones that deal with temperature coefficients. (Silicon resistors are very temperature dependent).
PAGE 4
last update December 6, 2011 SPD series pressure sensor reference SPD-dil family page 4/5 Interfacing SPD pressure sensors to microcontrollers. In general this kind if sensors based on Wheatstone bridges has to be connected to microcontrollers. These can be done very easy with the Smartec’s Universal Transducer Interface (UTI). Below the power of such a UTI system is explained.
PAGE 5
last update December 6, 2011 SPD series pressure sensor reference SPD-dil family page 5/5 Outline drawings and dimensions. 4 out + 5 exc 12 6 5 0.5C- ∅ 3 4 R=1 pressure port ( ∅ 0.8) 8 1 out 4 2.8 14 6.8 6 n.c. 2.54(2x) vent hole 2 exc 1 2 3 Gauge type sensor Connection diagram Gauge type (Top View) 0.5 4 exc + 7 + 4 5 out- 3.5 Atmospheric 7 2.54 11±0.5 Pressure inlet 0.25 1 exc - @bottom 1 0.15±0.1 2 exc - 0.8±0.2 6 n.c.