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The Analog Mixed Signal Company
ZMD31030
Automotive Sensor Signal Conditioner with LIN Interface PRELIMINARY Features
* Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity * Adjustable to nearly all piezo-resistive bridge sensor types * Digital one-shot calibration: quick and precise * Selectable temperature compensation reference: internal or external diode * Selectable separate input channel for an external temperature sensor * Output options: PWM (bridge sensor signal) or LIN interface (bridge and temp. sensor signal) * Digital sensor calibration via LIN interface * Sampling rate typically 125Hz * High voltage protection * Reverse polarity and short circuit protection * Operation temperature -40 to +125C * Supply voltage 8 to 18V
Brief Description
ZMD31030 is a CMOS integrated circuit for highly-accurate amplification and sensor-specific correction of bridge sensor and temperature sensor signals. Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity is accomplished via a 16-bit RISC microcontroller running a correction algorithm with calibration coefficients stored in a non-volatile EEPROM. The ZMD31030 is adjustable to nearly all piezo-resistive bridge sensors. Measured values are provided at the PWM output or at the LIN interface. The digital LIN bus 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 ZMD31030 are mated digitally: fast, precise and without the cost overhead associated with trimming by external devices or laser. The ZMD31030 is optimized for automotive environments by it's protection circuitry and excellent electromagnetic compatibility. * Evaluation kit will be available, containing PCBs, SSOP20 samples, software, documentation * Support for industrial mass calibration available * Quick circuit customization possible for large production volumes
Benefits
* No external trimming components required * PC-controlled configuration and calibration via digital LIN bus interface - simple, low cost * High accuracy (0.1% FSO @ -25 to 85C; 0.25% FSO @ -40 to 125C)
Block Schematic and Application Circuit (Example)
ANALOG SUPPLY VDDA DIGITAL SUPPLY VDD VB
CONTROL
30k
POWER MANAGEMENT AND PROTECTION CIRCUITS
VBAT
VTN LIN LIN CONTROLLER TRANSCEIVER
LIN LIN
www.lin-subbus.de
VDDB
SENSOR BRIDGE
VBP VBN VSSB
ANALOG SIGNAL CONDITIONING
DIGITAL SIGNAL POST PROCESSING
I/O IF
GND TEST IF DI
CLK ANALOG GROUND
ZMD31030
VSSA
DIGITAL GROUND
VSS
Application Examples
* Detection of low-/overpressure in fuel tanks * MAP Sensors * Hydraulic reservoir pressure monitoring
LIN (Local Interconnect Network)
* * * * Low-cost open bus standard for electronic components in cars Sub-bus for CAN (Controller Area Network) Single master / multiple slave concept Single-wire data transmission with battery voltage swing
for ABS and power steering
* Engine management * Comfort functions
Ordering Information
Ordering Code ZMD31030AD ES Description engineering samples as dice in waffletray ZMD31030AF ES engineering samples as finished parts ZMD31030AAB* dice on tested unsawn wafer ZMD31030AAC* dice on tested sawn wafer ZMD31030AAD* dice in waffle tray finished parts in tube ZMD31030AAF-R* finished parts in tape on reel ZMD31030KIT evaluation kit -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Operating Temperature Range
www.lin-subbus.de
Package Type die SSOP20
Device Marking
Shipping Form** waffle tray
ZMD 31030AF YYWW***
sample box or tube
die die die SSOP20 ZMD 31030AAF YYWW SSOP20 ZMD 31030AAF YYWW
6" wafer sawn 6" wafer on plastic frame waffle tray (100 dice / tray) tube (66 parts / tube) tape on reel (2000 parts / reel) box with PCBs, CD-ROM, SSOP20 samples
ZMD31030AAF-T*
* 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
(c) ZMD AG 2004 * Rev. 0.5 * 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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