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3–75
Motorola Sensor Device Data
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The Motorola 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.
Motorola’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 Motorola 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.
Figure 1 shows a block diagram of the internal circuitry integrated on a pressure
sensor chip.
Features
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
Application Examples
Manifold Sensing for Automotive Systems
Ideally Suited for Microprocessor or Microcontroller–Based Systems
Also Ideal for Non–Automotive Applications
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
PINS 4, 5 AND 6 ARE NO CONNECTS FOR
UNIBODY DEVICE
SEMICONDUCTOR TECHNICAL DATA
MPX4105A
CASE 867
UNIBODY PACKAGE
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.
1
2
3
Vout
Gnd
VS
4
5
6
N/C
N/C
N/C
INTEGRATED
PRESSURE SENSOR
15 to 105 kPa
(2.2 to 15.2 psi)
0.3 to 4.9 V Output
REV 4
F
Freescale Semiconductor, Inc.
n
.