MPX4105A, Integrated Silicon Pressure Sensor for Manifold Absolute Pressure, Applications, On-Chip Signal Conditioned, Temperature Compensated and Calibrated
Document overview
- Manufacturer or author: Freescale Semiconductor, Inc.
- PDF pages: 7
Technical content
Rev 8, 1/2009 Freescale Semiconductor © Freescale Semiconductor, Inc., 2005, 2009. All rights reserved. Pressure Integrated Silicon Pressure Sensor for Manifold Absolute Pressure, Applications, On-Chip Signal Conditioned, Temperature Compensated and Calibrated The Freescale MPX4105A series Manifold Absolute Pressure (MAP) sensor for engine control is designed to sense absolute air pressure within the intake manifold. This measurement can be used to compute the amount of fuel required for each cylinder. Freescale’s MAP sensor integrates on-chip, bipolar op amp circuitry and thin film resistor networks to provide a high output signal and temperature compensation. The small form factor and high reliability of on-chip integration make the Freescale MAP sensor a logical and economical choice for the automotive system designer. The MPX4105A series piezoresistive transducer is a state-of-the-art, monolithic, signal conditioned, silicon pressure sensor. This sensor combines advanced micromachining techniques, thin film metallization, and bipolar semiconductor processing to provide an accurate, high level analog output signal that is proportional to applied pressure.
- F e a t u r e s
- 1.8% Maximum Error Over 0 ° to 85°C
- Specifically Designed for Intake Manifold Absolute Pressure Sensing in Engine Control Systems
- Temperature Compensated Over –40 to +125 °C
- Durable Epoxy Unibody Element
ORDERING INFORMATION
No. # of Ports Pressure Type Device MarkingNone Single Dual Gauge Differential Absolute Unibody Package (MPX4105A Series) MPX4105A 867 • • MPX4105A MPX4105A Series 15 to 105 kPa (2.2 to 15.2 psi) 0.3 to 4.9 V Output UNIBODY PACKAGE MPX4105A CASE 867-08 Application Examples
- Manifold Sensing for Automotive Systems
- Ideally Suited for Microprocessor or Microcontroller-Based Systems
- Also Ideal for Non-Automotive
Applications
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Table 1. Operating Characteristics (VS = 5.1 Vdc, TA = 25°C unless otherwise noted, P1 > P2.
- 1.0 kPa (kiloPascal) equals 0.145 psi.
- Device is ratiometric within this specified excitation range.
- Offset (V off) is defined as the output voltage at the minimum rated pressure.
- Full Scale Output (V FSO) is defined as the output voltage at the maximum or full rated pressure.
- Full Scale Span (V FSS) is defined as the algebraic difference between the output voltage at full rated pressure and the output voltage at the
- Accuracy (error budget) consists of the following:
Linearity: Output deviation from a straight line relations hip with pressure over the specified pressure range. and from the minimum or maximum operating temperature points, with zero differential pressure applied. minimum or maximum rated pressure, at 25°C. TcSpan: Output deviation over the temperature range of 0 to 85 °C, relative to 25°C. TcOffset: Output deviation with minimum rated pressu re applied, over the temperature range of 0 to 85°C, relative to 25°C. Variation from Nominal: The variation from nominal values , for Offset or Full Scale Span, as a percent of VFSS, at 25°C.
- Response Time is defined as the time for the incremental change in the output to go from 10% to 90% of its final value when subjected to a
specified step change in pressure.
- Warm-up Time is defined as the time required for the product to meet the specified output voltage after the Pressure has been stabilized.
- Offset Stability is the product's output deviation when subjected to 1000 hours of Pulsed Pressure, Temperature Cycling with Bias Test.
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Figure 2. illustrates an absolute sensing chip in the basic compatibility in your application. Figure 3. shows the recommended decoupling circuit for the power supply is recommended. Figure 4. shows the sensor output signal relative to Figure 2. Cross Sectional Diagram (not to scale) Figure 3. Recommended Power Supply Figure 4. Output versus Absolute Pressure
Nominal Transfer Value: Vout = VS (P x 0.01 - 0.09) ± (Pressure Error x Temp. Factor x 0.01 x VS) VS = 5.1 V ± 0.25 Vdc Transfer Function (MPX4105A) MPX4105A Series Temp Multiplier –40 3.0 –20 1.5 0 to 85 1.0 125 2.5 Temperature in °C 4.0 3.0 2.0 0.0 1.0 –40 –20 0 20 40 60 14012010080 Temperature Error Factor NOTE: The Temperature Multiplier is a linear response from –40°C to –20°C, –20°C to 0°C, and from 85°C to 125°C. Temperature Error Band Error Limits for Pressure3.0 2.0 1.0 –1.0 –2.0 –3.0 0.0 20 40 60 80 100 120 Pressure (in kPa) Pressure Error (kPa) Pressure Error (Max) Pressure Error Band 40 to 94 (kPa) ±1.5 (kPa) Break Points 15 (kPa) ±2.4 (kPa) 105 (kPa) ±1.8 (kPa)
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F G N L R 123456
6 PLD
MAM0.136 (0.005) T POSITIVE PRESSURE (P1) C B M J S -A- STYLE 1: PIN 1. VOUT 2. GROUND 3. VCC 4. V1 5. V2 6. VEX STYLE 3: PIN 1. OPEN 2. GROUND 3. +VOUT 4. +VSUPPL Y 5. -VOUT 6. OPEN STYLE 2: PIN 1. OPEN 2. GROUND 3. -VOUT 4. VSUPPL Y 5. +VOUT 6. OPEN MAX MILLIMETERSINCHES 16.00 13.56 5.59 0.84 1.63 0.100 BSC 2.54 BSC 0.40 18.42 30˚ NOM 30˚ NOM 12.57 11.43 DIM A B C D F G J L M N R S MIN 0.595 0.514 0.200 0.027 0.048 0.014 0.695 0.475 0.430 0.090 MAX 0.630 0.534 0.220 0.033 0.064 0.016 0.725 0.495 0.450 0.105 MIN 15.11 13.06 5.08 0.68 1.22 0.36 17.65 12.07 10.92 2.29 2.66 NOTES: DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. CONTROLLING DIMENSION: INCH. DIMENSION -A- IS INCLUSIVE OF THE MOLD STOP RING. MOLD STOP RING NOT TO EXCEED 16.00 (0.630). CASE 867-08 ISSUE N UNIBODY PACKAGE
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