The
Analog
Mixed Signal Company
ZMD31035
Automotive Sensor Signal
Conditioner
PRELIMINARY
Features
•
Digital compensation of sensor offset, sensitivity,
temperature drift and non-linearity
•
Adjustable to nearly all piezo-resistive bridge sensors types
•
Digital one-shot calibration: quick and precise
•
Selectable temperature compensation reference:
internal or external diode
•
Output options: analog voltage (0 to 5V) or one-wire-interface
(LIN compatible protocol)
•
Digital sensor calibration via one-wire-interface
•
Sampling rate typically 125Hz
•
High voltage protection
•
Reverse polarity and short circuit protection
•
Operation temperature –40 to +125°C
•
Supply voltage 4.5 to 5.5V
Benefits
•
No external trimming components required
•
PC-controlled configuration and calibration
via one-wire interface – simple, low cost
•
High accuracy (±0.1% FSO @ -25 to 85°C;
±0.25% FSO @ -40 to 125°C)
Brief Description
The ZMD31035 is a CMOS integrated circuit for highly-
accurate amplification and sensor-specific correction of
bridge sensor signals. Digital compensation of sensor
offset, sensitivity, temperature drift and non-linearity is
accomplished via a 16-bit RISC micro-controller running
a correction algorithm with calibration coefficients stored
in a non-volatile EEPROM.
The ZMD31035 is adjustable to nearly all piezo-resistive
bridge sensors. Measured values are provided at the
analog voltage output or at the one-wire-interface.
The digital one-wire-interface can be used for a simple
PC-controlled calibration procedure, in order to program
a set of calibration coefficients into an on-chip EEPROM.
Thus a specific sensor and a ZMD31035 are mated digi-
tally: fast, precise and without the cost overhead associ-
ated with trimming by external devices or laser.
The ZMD31035 is optimized for automotive environ-
ments by it’s protection circuitry and excellent electro-
magnetic compatibility.
Application Circuit
VSSA
VDDB
VTN
VSSA
VDDA
ZMD31035
TEMP.
SENSING
DIODE
100n
DI
CLK
VDD
100n
VDDE
100n
VSS
VBN
BRIDGE
SENSOR
VSSB
VBP
AOUT
VSSE
• Evaluation kit will be available, containing PCBs,
SSOP14 samples, software, documentation
• Support for industrial mass calibration available
• Quick circuit customization possible for large
production volumes
15n
GND
OUT
OWI
V
SUPPLY
4.5...5.5V
Application Examples
•
Detection of low-/overpressure in fuel tanks
•
MAP Sensors
•
Hydraulic reservoir pressure monitoring for ABS
•
Engine management
•
Comfort functions
•
Tire pressure monitoring (in combination
and power steering
with wireless transmitters)
Ordering Information
Ordering Code
ZMD31035AD ES
Description
engineering samples
as dice in waffletray
ZMD31035AF ES
engineering samples
as finished parts
SSOP14
ZMD
31035AF
YYWW ***
ZMD31035AAB*
dice on tested
unsawn wafer
ZMD31035AAC*
dice on tested
sawn wafer
ZMD31035AAD*
dice in waffle tray
-40°C to +125°C
die
-40°C to +125°C
die
sawn 6” wafer
on plastic frame
waffle tray
(100 dice / tray)
ZMD31035AAF-T*
finished parts
in tube
-40°C to +125°C
SSOP14
ZMD
31035AAF
YYWW
ZMD31035AAF-R*
finished parts
in tape on reel
-40°C to +125°C
SSOP14
ZMD
31035AAF
YYWW
ZMD31035KIT
evaluation kit
box with PCBs, CD-ROM,
SSOP14 samples
tube
(2000 parts /reel)
tube
(77 parts / tube)
-40°C to +125°C
die
6” wafer
sample box or tube
Operating
Temperature Range
Package
Type
die
Device
Marking
Shipping Form**
waffle tray
*
Serial parts – available from serial production start
** The quantity ordered should be a multiple of the quantity / packing unit as specified
*** Optional labeled with “ES” in addition
For further
information:
ZMD AG
Grenzstrasse 28
01109 Dresden
Germany
Tel +49.351.8822.366
Fax +49.351.8822.337
sales@zmd.de
ZMD America, Inc.
201 Old Country Road, Suite 204
Melville, NY 11747
USA
Tel +1.631.549.2666
Fax +1.631.549.2882
sales@zmda.com
ZMD America, Inc.
15373 Innovation Drive, Suite 115
San Diego, CA 92128
USA
Tel +1.858.674.8070
Fax +1.858.674.8071
sales@zmda.com
colosseum-group.de
© ZMD AG 2004 · Rev. 0.2 · Preliminary
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 to in writing. The information furnished hereby is believed to be true and accurate. However, ZMD shall not be liable to any customer, licencee 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, licencee or any other third party
shall result from ZMD's rendering of technical or other services.
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