ZMD31020 Differential Sensor Signal Conditioner Description ZMD31020 is a CMOS integrated circuit for the conditioning of ratiometric differential sensor signals. The device provides digital compensation of sensor offset, sensor sensitivity, temperature drift and non-linearity through a 16-bit RISC-microcontroller running a correction algorithm. A bidirectional I2C-interface allows for a simple PC-controlled calibration procedure, encompassing writing and programming of a set of calibration coefficients into an on-chip EEPROM. Thus a specific sensor and a ZMD31020 device are mated digitally: fast, precise and without cost overhead for trimming components. The ZMD31020 has been designed for commercial, industrial and automotive applications and is specifically suited for piezo-resistive pressure sensors. Features · · · · · · · · · · 0.25%FSO accurate digital concept, based on 16-bit RISC-µController Ratiometric differential input stage: min. span 20mV/V; 15.66x to 42x PGA; 12-bit A-to-D conversion Temperature reference: off- or on-chip diode; 10-bit A-to-D Conversion nd 2 order signal conditioning algorithm, based on 7 calibration constants 0 to 5V ratiometric analog output & I2C digital output (12-bit resolution) Throughput: 100 results / s PC-controlled electronic calibration – simple, low-cost Operation: -40°C to +125°C; +4.5V to +5.5V Deliverable in SSOP14 (5.2mm width) or as die Demokit available: samples, documentation, calibration-HW / SW Application Circuit Feature Sheet, Rev. 1.0, April 9th, 2002 © ZMD AG ZMD31020 Differential Sensor Signal Conditioner Application Examples Refrigerant Pressure Monitoring Blood Pressure Meter Filter Check Demokit ZMD31020DK Components: · Calibration board, equipped with zeroinsertion-force socket for ZMD31020, PC-interface, and sensor interface · CD-ROM, containing datasheet, application note, and calibration & evaluation software · Sensor dummy incl. temperature sensing diode, which fits to the calibration board’s sensor interface · ZMD31020 samples: 10 dice in wafflepack, 5 finished parts (SSOP14) Ordering Information Order as follows OperationTemp. Package Packing Unit ZMD31020AB -40°C ... +125°C Die 5''-Wafer, electrically tested, unsawn dice on tested unsawn wafer ZMD31020AC -40°C ... +125°C Die 5''-Wafer, electrically tested, on frame, dice on tested sawn wafer sawn ZMD31020AF -40°C ... +125°C SSOP14 Tube (77 parts / tube)(*) finished parts in tube (*) ZMD31020AF -40°C ... +125°C SSOP14 Tape on reel (2000 parts / reel)(*) finished parts in tape on reel (*) ZMD31020DK demokit (*) The quantity ordered should be a multiple of the quantity / packing unit as specified Sales Office Dresden ZMD AG Grenzstraße 28 01109 Dresden, Germany Phone +49-351-8822-310 Fax +49-351-8822-337 e-mail [email protected] http:// www.zmd.de Sales Office Long Island ZMD America Inc. 201 Old Country Road, Suite 204 Melville, NY 11747, USA Phone +1-631-549-2666 Fax +1-631-549-2882 e-mail [email protected] http:// www.zmda.com 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. Feature Sheet, Rev. 1.0, April 9th, 2002 © ZMD AG