http://www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf





Silicon Microstructures
Silicon Microstructures

SM5822 Datasheet Preview

SM5822 Datasheet

Co-Integrated Pressure Sensor

No Preview Available !

SM5822 pdf
SILICON
MICROSTRUCTURES
INCORPORATED
SM5812/SM5852
Amplified Pressure Sensor
NOW WITH ACCESS TO DIGITAL TEMPERATURE AND CORRECTED DIGITAL PRESSURE
LOW-COST, FULLY AMPLIFIED, CALIBRATED, AND COMPENSATED IN A SINGLE PACKAGE
AVAILABLE FOR DIFFERENTIAL, SINGLE-ENDED DIFFERENTIAL, GAGE & ABSOLUTE APPLICATIONS
MULTIPLE PRESSURE RANGES AVAILABLE TO MEASURE PRESSURE DOWN TO 0.15 PSI FULL-SCALE
AND UP TO 100 PSI FULL-SCALE
DESCRIPTION
The Silicon Microstructures SM5812 and
SM5852 series of OEM pressure sensors
combines state-of-the-art pressure sensor
technology with CMOS digital signal
processing technology to produce an
amplified, fully conditioned, multi-order
pressure and temperature compensated
sensor in a dual in-line package (DIP)
configuration.
Combining the pressure sensor with a
custom signal conditioning ASIC in a single
package simplifies the use of advanced
silicon micromachined pressure sensors.
Now, the pressure sensor can be mounted
directly to a standard printed circuit board
and an amplified, high level, calibrated
pressure signal can be acquired from the
digital interface or analog output. This
eliminates the need of additional circuitry,
such as a compensation network or micro-
controller containing a custom correction
algorithm.
The SM5812/SM5852 Series pressure
sensors are based on SMI's highly stable,
piezoresistive pressure sensor chips
mounted on a ceramic substrate. An
electronically programmable ASIC is
contained in the same package to provide
calibration and temperature compensation.
The model SM5812 is designed for
operating pressure ranges from 0-5 PSI up
to 0-100 PSI. The model SM5852 is
designed for operating pressure ranges from
0-0.15 PSI up to 0-3 PSI. For both models,
the sensor output is ratiometric with the
supply voltage.
FEATURES
Amplified, calibrated, fully signal
conditioned output span of 4.0 VDC FS
(0.5 to 4.5 V signal)
Digital temperature and calibrated
pressure available through I2C interface
Output ratiometric with supply voltage
Multi-order correction for pressure non-
linearity (factory programmed)
Multi-order correction for temperature
coefficient of span and offset (factory
programmed)
Gage, differential, and absolute versions
SMI’s unique low-pressure die allows for
a full-scale pressure range of 0-0.15 PSI
TYPICAL APPLICATIONS
Barometric measurement
Medical instrumentation
Pneumatic control
Gas flow
Respirators and ventilators
Heating, Ventilation and Air Conditioning
(HVAC)
Rev 1.4 6_05
2005 SMI
Silicon Microstructures, Inc. 1701 McCarthy Blvd. Milpitas, CA 95035 USA
Tel: 408-577-0100 Fax: 408-577-0123 Sales@si-micro.com www.si-micro.com



Silicon Microstructures
Silicon Microstructures

SM5822 Datasheet Preview

SM5822 Datasheet

Co-Integrated Pressure Sensor

No Preview Available !

SM5822 pdf
SM5812/SM5852
THEORY OF OPERATION
The operation of the signal processor is
depicted in the block diagram below. The
external pressure sensor is a piezoresistive
bridge. This transduces the applied pressure
into an electronic signal, which is then inputted
into the integrating amplifier of the ASIC.
During the amplification step an offset
correction factor is added in order to allow
maximum gain for a given pressure while
minimizing the offset error.
The signal is then passed to an 11-bit analog
to digital converter (ADC). The ADC samples
the signal multiple times and uses the sum of
those samples as a 13-bit word.
A digital signal processor (DSP) is then used
to correct and calibrate the pressure signal.
The DSP provides multi-order correction of
both pressure and temperature non-linearity
through the use of factory-programmed
coefficients. A combined total of twenty
coefficients are available for correcting
pressure and temperature non-linearity. The
unique coefficients are determined during a
calibration process performed at the factory.
Factory calibration is the last step performed
which means the effect of the package on
the pressure signal will also be taken into
account. This provides a great advantage
over conventional laser-trimming
approaches.
The DSP outputs a corrected digital word,
which travels to a 12-bit digital to analog
converter (DAC) to provide a calibrated
analog output. In addition to the analog
output, the corrected pressure signal is
accessible through an I2C digital interface.
See SMI application note AN05-001 for a
detailed description of how to read out the
digital corrected pressure signal using the
I2C bus interface.
+ 5 VDC
External
Piezoresistive
Bridge
Ground
SMI Multi-Order Pressure and
Temperature Correction ASIC
Band-gap
VTemp
Switched
Capacitor
Integrateing
Amplifier
+ 5 VDC
MUX
11-bit ADC
DSP
(multi-order
correction of
pressure and
temperature
non-
linearities)
12-bit
Sigma-
Delta DAC
Power-On
Reset
Analog
Timing
Control
2 MHz
Oscillator
EEPROM
Array
Digital Timing
and Control
Management
Ground
Output
Buffer
Analog
Output
I2C Digital
Interface
SDA
SCL
Analog Component
Digital Component
Rev 1.4 6_05
2005 SMI
Silicon Microstructures, Inc. 1701 McCarthy Blvd. Milpitas, CA 95035 USA
Tel: 408-577-0100 Fax: 408-577-0123 Sales@si-micro.com www.si-micro.com


Part Number SM5822
Description Co-Integrated Pressure Sensor
Maker Silicon Microstructures
Total Page 4 Pages
PDF Download
SM5822 pdf
Download PDF File
SM5822 pdf
View for Mobile






Related Datasheet

1 SM5820 SCHOTTKY BARRIER RECTIFIERS GME
GME
SM5820 pdf
2 SM5820 Surface Mount Schottky Barrier Rectifiers LGE
LGE
SM5820 pdf
3 SM5820B 3.0 AMP SURFACE MOUNT SCHOTTKY BARRIER RECTIFIERS Bytes
Bytes
SM5820B pdf
4 SM5820B 3.0 AMP SURFACE MOUNT SCHOTTKY BARRIER RECTIFIERS GW
GW
SM5820B pdf
5 SM5821 SCHOTTKY BARRIER RECTIFIERS GME
GME
SM5821 pdf
6 SM5821 Surface Mount Schottky Barrier Rectifiers LGE
LGE
SM5821 pdf
7 SM5821B 3.0 AMP SURFACE MOUNT SCHOTTKY BARRIER RECTIFIERS Bytes
Bytes
SM5821B pdf
8 SM5821B 3.0 AMP SURFACE MOUNT SCHOTTKY BARRIER RECTIFIERS GW
GW
SM5821B pdf
9 SM5822 SCHOTTKY BARRIER RECTIFIERS GME
GME
SM5822 pdf




Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components