Bridge Sensor Signal Conditioner IC with LIN Interface, Nonlinearity Correction, Temperature Compensation Data Sheet ADA4558 FEATURES GENERAL DESCRIPTION LIN 2.1 compliant interface (bridge sensor signal, temperature) The ADA4558 is a fully integrated, sensor signal conditioner Digitally programmable gain and offset voltage adjustment IC for bridge sensors. The device provides digital nonlinearity Gain range from 2.94 V/V to 971.10 V/V correction and temperature compensation via internal or external Sensor temperature compensation (first- or second-order) sensed temperatures using on-chip correction and calibration Sensor nonlinearity correction (first- or second-order) hardware that can be optimized for a specific bridge sensor. Internal or external temperature sensor compensation The ADA4558 utilizes a fourth-order digital correction algorithm EEPROM nonvolatile memory for calibration data and delivers a system accuracy of 0.1% full scale range (FSR) for High system accuracy: 0.1% FSR over temperature bridge sensors with second-order nonlinearity sensitivity. The EMC and EMI protection ADA4558 includes a local interconnect network (LIN) physical Fault protection for open circuits and short circuits interface for single-wire, high voltage communications in 4 mm 4 mm, 20-lead LFCSP automotive environments. LIN 2.1 and earlier versions are 6 V to 18 V supply operation supported. The LIN interface allows access to measurements, 40C to +150C operating temperature range end of line (EOL) calibration, and a wide range of diagnostic AEC-Q100 qualified for automotive applications functions. APPLICATIONS The analog subsystem consists of an analog-to-digital Strain gage converter (ADC) and a programmable gain amplifier (PGA) Pressure signal conditioner for automotive vehicles with a wide gain range from 2.94 V/V to 971.10 V/V. To minimize power supply noise, the bridge sensor is biased with an internal 4 V voltage regulator. The ADA4558 is fully specified from 40C to +150C. The device operates from battery supply voltages of 6 V to 18 V. The ADA4558 is available in a 4 mm 4 mm, 20-lead lead frame chip scale package (LFCSP). FUNCTIONAL BLOCK DIAGRAM INPUT VOLTAGE = 6V TO 18V VDD12 DVDD POWER SECTION VREG 5V LDO 1.8V LDO REFERENCE VREG 0.1F DIGITAL CORRECTION ENGINE EMI AFE FILTER VPOS CORRECTION ALGORITHM LOW-PASS SENSOR BRIDGE FILTER VREG LIN2 PGA FAULT HANDLING VNEG LIN 14-BIT IIR LIN MUX TRANSCEIVER ADC FILTER OFFSET ADJUSTMENT VREG COMMUNICATION BUS VREG RREFN STATIC ONE TIME EEPROM + TPOS RANDOM PROGRAM- OPTIONAL ACCESS MABLE EXTERNAL TNEG MEMORY MEMORY RESISTIVE TEMPERATURE DETECTOR INTERNAL TEMPERATURE SENSOR ISINK ADA4558 AGND DGND LINGND Figure 1. Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 2019 Analog Devices, Inc. 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Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 172 45-0 01ADA4558 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................8 Applications ....................................................................................... 1 Theory of Operation .........................................................................9 General Description ......................................................................... 1 Applications Information .............................................................. 10 Functional Block Diagram .............................................................. 1 Typical Connection Diagram ................................................... 10 Revision History ............................................................................... 2 EMC Performance ...................................................................... 10 Specif icat ions ..................................................................................... 3 PCB Layout Guidelines .............................................................. 11 Absolute Maximum Ratings ............................................................ 6 Outline Dimensions ....................................................................... 12 Thermal Resistance ...................................................................... 6 Ordering Guide .......................................................................... 12 ESD Caution .................................................................................. 6 Automotive Products ................................................................. 12 Pin Configuration and Function Descriptions ............................. 7 REVISION HISTORY 6/2019Revision 0: Initial Version Rev. 0 Page 2 of 12