3–88
Motorola Sensor Device Data
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The Motorola MPX4250A/MPXA4250A 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.
The MPX4250A/MPXA4250A series piezoresistive transducer is a state–of–the–art
monolithic silicon pressure sensor designed for a wide range of applications, particularly
those employing a microcontroller or microprocessor with A/D inputs. This transducer
combines advanced micromachining techniques, thin–film metallization and bipolar
processing to provide an accurate, high–level analog output signal that is proportional to
the applied pressure. The small form factor and high reliability of on–chip integration
make the Motorola sensor a logical and economical choice for the automotive system
engineer.
Features
1.5% Maximum Error Over 0
°
to 85
°
C
Specifically Designed for Intake Manifold Absolute
Pressure Sensing in Engine Control Systems
Patented Silicon Shear Stress Strain Gauge
Temperature Compensated Over –40
°
to +125
°
C
Offers Reduction in Weight and Volume Compared
to Existing Hybrid Modules
Durable Epoxy Unibody Element or Thermoplastic
Small Outline, Surface Mount Package
Ideal for Non–Automotive Applications
Application Examples
Turbo Boost Engine Control
Ideally Suited for Microprocessor or Microcontroller–
Based Systems
PINS 4, 5, AND 6 ARE NO CONNECTS FOR
UNIBODY DEVICE
PINS 1, 5, 6, 7, AND 8 ARE NO CONNECTS
FOR SMALL OUTLINE PACKAGE DEVICE
Figure 1. Fully Integrated Pressure Sensor
Schematic
VS
SENSING
ELEMENT
Vout
GND
THIN FILM
TEMPERATURE
COMPENSATION
AND
GAIN STAGE #1
GAIN STAGE #2
AND
GROUND
REFERENCE
SHIFT CIRCUITRY
SEMICONDUCTOR TECHNICAL DATA
PIN NUMBER
NOTE: Pins 1, 5, 6, and 7 are internal
device connections. Do not connect
to external circuitry or ground. Pin 1
is noted by the notch in the lead.
1
2
3
N/C
VS
Gnd
5
6
7
N/C
N/C
N/C
PORT OPTION
CASE 482
PORT OPTION
CASE 482A
4
Vout
8
N/C
SMALL OUTLINE PACKAGE
INTEGRATED
PRESSURE SENSOR
20 to 250 kPa (2.9 to 36.3 psi)
0.2 to 4.9 V OUTPUT
PIN NUMBER
NOTE: Pins 4, 5, and 6 are internal
device connections. Do not connect
to external circuitry or ground. Pin 1
is noted by the notch in the lead.
BASIC CHIP
CARRIER ELEMENT
CASE 867, STYLE 1
PORT OPTION
CASE 867B, STYLE 1
1
2
3
Vout
Gnd
VS
4
5
6
N/C
N/C
N/C
UNIBODY PACKAGE
REV 4
F
Freescale Semiconductor, Inc.
n
.