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參數(shù)資料
| 型號： | SM5852-003-D-3-L |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Amplified Pressure Sensor |
| 中文描述： | 擴(kuò)增壓力傳感器 |
| 文件頁數(shù)： | 2/4頁 |
| 文件大小： | 210K |
| 代理商： | SM5852-003-D-3-L |
SM5812/SM5852
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
Rev 1.4 6_05
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 I
C 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.
Switched
Capacitor
Integrateing
Amplifier
Analog
Timing
Control
2 MHz
Oscillator
Power-On
Reset
V
Temp
11-bit ADC
MUX
EEPROM
Array
Band-gap
Output
Buffer
Analog
Output
SDA
SCL
Ground
+ 5 VDC
SMI Multi-Order Pressure and
Temperature Correction ASIC
Analog Component
Digital Component
External
Piezoresistive
Bridge
+ 5 VDC
Ground
DSP
(multi-order
correction of
pressure and
temperature
non-
linearities)
12-bit
Sigma-
Delta DAC
Digital Timing
and Control
Management
I
2
C Digital
Interface
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SM5852-003-D-3-N | Amplified Pressure Sensor |
| SM5852-003-D-5-L | Amplified Pressure Sensor |
| SM5852-003-D-5-N | Amplified Pressure Sensor |
| SM5852-003-G-3-L | Amplified Pressure Sensor |
| SM5852-003-G-3-N | Amplified Pressure Sensor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SM5852-003-D-3-LR | 功能描述:板上安裝壓力/力傳感器 RoHS:否 制造商:Honeywell 工作壓力:0 bar to 4 bar 壓力類型:Gage 準(zhǔn)確性:+ / - 0.25 % 輸出類型:Digital 安裝風(fēng)格:Through Hole 工作電源電壓:5 V 封裝 / 箱體:SIP 端口類型:Dual Radial Barbed, Same sides |
| SM5852-003-D-3-N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Amplified Pressure Sensor |
| SM5852-003-D-5-L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Amplified Pressure Sensor |
| SM5852-003-D-5-N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Amplified Pressure Sensor |
| SM5852-003-G-3-L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Amplified Pressure Sensor |
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