E524.05 Datasheet, PDF (1/2 Pages) ELMOS Semiconductor AG – SIGNAL CONDITIONING IC FOR DIRECT DRIVEN ULTRASONIC SENSORS

SIGNAL CONDITIONING IC FOR DIRECT DRIVEN ULTRASONIC SENSORS
PRELIMINARY INFORMATION - JUL 11, 2014
E524.05/06
Features
ÿÿ Transformerless direct transducer driver
ÿÿ Programmable to transducer frequencies
between 38kHz and 72kHz
ÿÿ Bi-directional interface in 2-wire & 3-wire variants
ÿÿ Supply voltage independent performance
ÿÿ Optimized short & long range performance by:
• active and passive damping mechanisms
• sensitivity time control
• optional automatic threshold generation
ÿÿ Fully integrated digital signal conditioning
ÿÿ Programmable transducer voltage & burst length
ÿÿ Programmable receiver amplifier gain
ÿÿ Digital envelope and threshold readout via
test mode
ÿÿ Transducer diagnosis information
ÿÿ Embedded EEPROM for calibration data
ÿÿ Chip ID for traceability
Applications
ÿÿ Ultrasonic park assist systems (USPA, PAS,...)
ÿÿ Industrial distance measuring
ÿÿ Robotics
General Description
The device builds the core for a robust and easy-to-han-
dle distance measurement system, while offering flex-
ibility for customer applications.
A driver unit stimulates the direct connected ultrasonic
transducer. Driver frequency, transducer voltage, burst
length, amplifier gain and other parameters are user
configurable. Active and passive damping mechanisms
combined with STC (Sensitivity Time Control) and ATG
(automatic threshold generation) optimize short and
long range performance.
The received echo signal is amplified, converted and
digitally processed. Customized obstacle interpretation
is feasible by a variable detection threshold. In SEND
Mode the circuit triggers the ultrasonic transducer
while in RECEIVE ONLY Mode only indirect echo signals
are detected.
Application relevant settings can be stored in EEPROM
during an End-Of-Line calibration by the customer. For
evaluation and debugging purposes, envelope and
threshold data can be read out via test mode.
Communication with the control unit is possible via
2-wire or 3-wire configuration. The E524.05 supports a
bi-directional communication via data modulation on
the supply line. The E524.06 supports a dedicated IO-
line for data transfer.
Typical Application Circuit
Ordering Information
Ordering-No. Temp Range Interface Package
E52405A52C -40°C to +105°C 2-wire QFN20L4
E52406A52C -40°C to +105°C 3-wire QFN20L4
ECU
Sensor Module
Ultrasonic
Transducer
ECU
Sensor Module
Ultrasonic
Transducer
VSUP_DATA
GND
VDRV
DRV1
DRV2
AING
AINS
VSUP
VDDD
GNDD
GNDP
E524.05
VDDA
GNDA
IO
VSUP_LINE
GND
DATA
VDRV
DRV1
DRV2
AING
AINS
VSUP
VDDD
GNDD
GNDP
E524.06
VDDA
GNDA
IO
This document contains information on a pre-production product. Elmos Semiconductor AG reserves the right to change specifications and information herein without notice.
Elmos Semiconductor AG
Info Sheet
QM-No.: 25IS0112E.02