Datasheet ADA4558 (Analog Devices)

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,
−40°C to +150°C 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 −40°C to +150°C. 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 0.1µF DIGITAL CORRECTION ENGINE EMI AFE FILTER VPOS SENSOR LOW-PASS CORRECTION ALGORITHM BRIDGE FILTER VREG LIN2 PGA FAULT HANDLING VNEG 14-BIT IIR LIN LIN MUX ADC FILTER TRANSCEIVER ±OFFSET ADJUSTMENT VREG COMMUNICATION BUS VREG RREFN STATIC EEPROM ONE TIME + TPOS RANDOM PROGRAM- OPTIONAL ACCESS MABLE EXTERNAL TNEG MEMORY MEMORY RESISTIVE TEMPERATURE – DETECTOR INTERNAL TEMPERATURE SENSOR ISINK ADA4558 AGND DGND LINGND
01 0 45- 172 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 rights of third parties that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2019 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION TYPICAL CONNECTION DIAGRAM EMC PERFORMANCE PCB LAYOUT GUIDELINES OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS