ZMD ZMD31150 User Manual

The Analog Mixed Signal Company

Sensor
Module

ZMD
31150

ZMD31150

Fast Automotive
Sensor Signal Conditioner

P R E L I M I N A RY

Features

• Digital compensation of sensor offset, sensitivity,

temperature drift and non-linearity

• Adjustable to nearly all bridge sensors types

• Output options: analog voltage (0 to +5V), ZACwire
(digital one-wire-interface) or I

• Selectable temperature compensation reference:

Internal/external diode, bridge resistance, thermistor

• Sensor biasing by voltage or constant current

• Sample rate up to 7.8 kHz

• High voltage protection (+33V without time limit)

• Reverse polarity and short circuit protection

• Wide operation temperature range: -40 to +150°C

• Supply voltage: +4.5 to +5.5V

• Several safety and diagnosis functions

• Product traceability by user-defined EEPROM entries

• Available in SSOP14 package or as die

2

C serial bus

TM

Benefits

• No external trimming components required

• Only a few external protection devices needed

• PC-controlled configuration and “one-shot“ calibration

via I2C or ZACwireTM interface:
Simple, cost-efficient, quick and precise

• High accuracy: ±0.1% FSO @ -25 to +85°C;

±0.25% FSO @ -40 to +125°C;
±0.5% FSO @ -40 to +150°C

(all numbers for digital output)

Brief Description

ZMD31150 is a CMOS integrated circuit for high-accurate
amplification and sensor-specific correction of bridge sensor
signals. Digital compensation of offset, sensitivity, tempera­ture drift and non-linearity is accomplished via a 16-bit RISC
micro-controller running a correction algorithm.
The ZMD31150 is adjustable to nearly all resistive bridge
sensor types, e.g. piezo-resistive, metal-thinfilm, ceramic­thickfilm, etc. Measured values are provided at the analog
voltage output or at one of the digital serial interfaces
(ZACwireTM, I2C).
The serial interfaces can also be used for a simple PC-control­led calibration procedure, in order to program a set of cali­bration coefficients into the on-chip EEPROM. Thus a specific
transducer and a ZMD31150 are mated digitally: Simply, fast,
precisely and without the cost overhead associated with trim­ming by external devices or laser.
The ZMD31150 is optimized for automotive environments by
its protection circuitry and excellent electromagnetic compa­tibility.

Support

• Evaluation kit available
(containing PCBs, samples, software, documentation)

• Support for industrial mass calibration available

• Quick circuit customization possible for large production
volumes

Application Circuit Example

Application Examples

• MAP sensors (intake manifold press., charging air press.)

• Atmospheric reference pressure sensors for charging air

and exhaust-gas recirculation

• Absolute oil pressure sensors for service displays

• Refrigerant pressure monitoring in air conditioning systems

• Differential pressure sensors for fuel filter contamination

• T

ire pressure sensors (combined with wireless transmitters)

• Low-/overpressure sensors in fuel tanks

• Occupant classification (OC) pressure sensors

• Diesel common-rail pressure sensors

• Gas rail pressure sensors

• Hydraulic reservoir pressure sensors for ABS

and power steering

High-Pressure Sensors

Low-Pressure Sensors

Application Support

ZMD AG

Grenzstrasse 28
01109 Dresden
Germany
Tel [phone]
Fax [phone]
[e-mail]

ZMD America, Inc.

201 Old Country Road,
Suite 204
Melville, NY 11747
USA
Tel [phone]
Fax [phone]
[e-mail]

ZMD America, Inc.

201 Old Country Road,
Suite 204
Melville, NY 11747
USA
Tel [phone]
Fax [phone]
[e-mail]

For the current revision of this document and for additional information about this and other products please look at www.zmd.biz

This information applies to a product under development. Its characteristics and specifications are subject to change without notice. ZMD assumes no obligation
regarding future manufacture unless otherwise agreed in writing. The information furnished hereby is believed to be correct and accurate. However, ZMD shall not be
liable to any customer, licensee or any other third party for any damages in connection with or arising out of the furnishing, performance or use of this technical data.
No obligation or liability to any customer, licensee or any other third party shall result from ZMD’s rendering of technical or other services.

© ZMD AG 2006 · Rev. 0.7 · Preliminary
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored,
or used without the prior written consent of the copyright owner. The Information furnished in this publication
is preliminary and subject to changes without notice.

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