E524.24 Datasheet, PDF (1/2 Pages) ELMOS Semiconductor AG – LIN SMART ULTRASONIC PARKING ASSIST

LIN SMART ULTRASONIC PARKING ASSIST
PRELIMINARY DATA SHEET - JUL 17, 2013
E524.24
Features
ÿÿ Driver for Ultrasonic transducer using centre
tapped transformer
ÿÿ Supports
• Park Assist
• Side Park Assist
ÿÿ Build in diagnostic functions, eg.
• Short or open transducer output
ÿÿ Two Measurement Modes
• Direct
• Indirect for triangulation
ÿÿ Temperature sensor
ÿÿ Storage of adjustment values in EEPROM
ÿÿ Digital filtering and signal processing
ÿÿ Low noise down to 0.5μV_RMS referred to input
ÿÿ Internal oscillator
ÿÿ LIN 2.1 interface with SNPD (Slave Node Position
Detection)
Applications
ÿÿ Ultrasonic Sensor Systems with 30 to 80 kHz
ÿÿ Park Assist System
ÿÿ Side Park Assist System
General Description
The IC drives an ultrasonic transducer via a centre
tapped transformer with a programmable frequen-
cy. After amplification and A/D-conversion the signal
is digitally filtered to achieve a perfect tracking to the
sending frequency without external components and
trimming. The adjusted values of oscillator/sending fre-
quency, transmitted power receiver sensitivity can be
adjusted and stored in an internal EEPROM. The circuit
communicates with a central control device via a sin-
gle-wire bus which is physically LIN 2.1 compatible. For
ease of use a LIN-driver and standard application func-
tions like threshold generation and timer capture are
available.
Several diagnostic functions are implemented. A short
or open at the transducer output can be detected as
well as thermal shut down or under voltage.
Ordering Information
Product ID
E524.24
Temp Range
-40°C to +105°C
Package
QFN20L5
Typical Application Circuit
RSUP_TD
CSUP_TD
RTD1
VBAT ^RSUP
DSUP
CSUP1
CSUP2
VSUP
DRV1
DRV2
CTD1
CAIN2
RAIN
CAIN1
Ultrasonic
Transducer
AING
AINS
GPIO1
GPIO2
TDO / GPIO3
TDI / GPIO4
LIN_S
LIN_M
CBUS
BUS_S
BUS_M
GNDB
E524.24
GNDP TMEN TCK TMS
VDDD
GNDD
VDDA
GNDA
CVDDD
CVDDA
This document contains information on a new product. Elmos Semiconductor AG reserves the right to change specifications and information herein without notice.
Elmos Semiconductor AG
Info Sheet
QM-No.: 25IS0119E.00