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Motorola Sensor Device Data

Integrated Silicon Pressure Sensor

Manifold Absolute Pressure Sensor

On-Chip Signal Conditioned,

Temperature Compensated

and Calibrated

The Motorola MPX4105 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

small form factor and high reliability of on–chip integration makes the Motorola MAP

sensor a logical and economical choice for automotive system designers.

The MPX4105 series piezoresistive transducer is a state–of–the–art, monolithic,

signal conditioned silicon pressure sensor. This sensor with its patented transducer,

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

• 1.7% Maximum Error over 0° to 85°C

• Specifically Designed for Intake Manifold Absolute Pressure Sensing in Engine

Control Systems

• Ideally Suited for Microprocessor Interfacing

• Patented Silicon Shear Stress Strain Gauge

• Temperature Compensated over –40°C to +125°C

• Durable Epoxy Unibody Element

• Ideal for Non–Automotive Applications

• Consult Factory for Top Piston Fit Package Availability

Application Examples

• Manifold Sensing for Automotive Systems

VS

3

X–ducer

SENSING

ELEMENT

1

Vout

2

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

Figure 1. Fully Integrated Pressure Sensor Schematic

Senseon and X–ducer are trademarks of Motorola, Inc.

Order this document

by MPX4105/D

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

MPX4105

SERIES

OPERATING OVERVIEW

INTEGRATED PRESSURE

SENSOR

15 to 105 kPa

(2.18 to 15.2 psi)

0.31 to 4.90 Volts Output

NOTE: Pin 1 is the notched pin.

PIN NUMBER

NOTE: Pins 4, 5, and 6 are internal

device connections. Do not connect

to external circuitry or ground.

BASIC CHIP CARRIER

ELEMENT

CASE 867–08, STYLE 1

1

2

3

Vout

Gnd

VS

4

5

6

N/C

N/C

N/C