The Analog Mixed Signal Company ZMD31030 Automotive Sensor Signal Conditioner with LIN Interface PRELIMINARY Features Brief Description • 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 +125°C • Supply voltage 8 to 18V 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. Benefits • 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 • 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 85°C; ±0.25% FSO @ -40 to 125°C) Block Schematic and Application Circuit (Example) DIGITAL SUPPLY VDDA CONTROL VB VDD POWER MANAGEMENT AND PROTECTION CIRCUITS VBAT 30k ANALOG SUPPLY VTN SENSOR BRIDGE VDDB VBP LIN ANALOG SIGNAL CONDITIONING DIGITAL SIGNAL POST PROCESSING I/O LIN LIN CONTROLLER TRANSCEIVER LIN GND IF TEST IF VBN DI VSSB CLK ANALOG GROUND ZMD31030 VSSA DIGITAL GROUND VSS www.lin-subbus.de Application Examples LIN (Local Interconnect Network) • Detection of low-/overpressure in fuel tanks • • • • • MAP Sensors • Hydraulic reservoir pressure monitoring for ABS and power steering 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 • Engine management • Comfort functions Ordering Information Ordering Code Description ZMD31030AD ES engineering samples www.lin-subbus.de Operating Temperature Range Package Type Device Marking die Shipping Form** waffle tray as dice in waffletray ZMD31030AF ES engineering samples SSOP20 as finished parts ZMD sample box or tube 31030AF YYWW*** ZMD31030AAB* dice on tested -40°C to +125°C die 6” wafer -40°C to +125°C die sawn 6” wafer unsawn wafer ZMD31030AAC* dice on tested sawn wafer ZMD31030AAD* dice in waffle tray on plastic frame -40°C to +125°C die waffle tray (100 dice / tray) ZMD31030AAF-T* finished parts -40°C to +125°C SSOP20 in tube ZMD tube 31030AAF (66 parts / tube) YYWW ZMD31030AAF-R* finished parts -40°C to +125°C SSOP20 in tape on reel ZMD tape on reel 31030AAF (2000 parts / reel) YYWW ZMD31030KIT evaluation kit box with PCBs, CD-ROM, SSOP20 samples * 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 colosseum-group.de For further information: ZMD AG Grenzstrasse 28 01109 Dresden Germany Tel +49.351.8822.366 Fax +49.351.8822.337 [email protected] © ZMD AG 2004 · Rev. 0.5 · Preliminary ZMD America, Inc. 201 Old Country Road, Suite 204 Melville, NY 11747 USA Tel +1.631.549.2666 Fax +1.631.549.2882 [email protected] ZMD America, Inc. 15373 Innovation Drive, Suite 115 San Diego, CA 92128 USA Tel +1.858.674.8070 Fax +1.858.674.8071 [email protected] 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.