A2SI-L14-G1-SR ZMDI, A2SI-L14-G1-SR Datasheet - Page 14

• Manufacturer Part Number: A2SI-L14-G1-SR
• Description: Interface - Specialized ASI
• Manufacturer: ZMDI

Specifications of A2SI-L14-G1-SR

• Rohs: yes
• Product Type: Actuator Sensor Interface IC
• Operating Supply Voltage: 12 V to 31.6 V
• Supply Current: 8.5 mA
• Maximum Power Dissipation: 500 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOP-14
• Minimum Operating Temperature: - 25 C

4 Functional Description
4.1. Functional Block Diagram
4.2. Power Supply
The power supply is derived from the AS-i line through an external reverse polarity protection diode and coil,
and provided at pin V
4.3. Receiver
The receiver detects the signals on the AS-i line and delivers the appropriate pulses to the digital logic. The
DC value of the input signal is removed and the AC signal is band-pass filtered. This circuit is operating on
both ASI+ and ASI- lines to take the differential nature of the signals into account. The digital output signals
are extracted from the sin
pulse determines the threshold level for all following pulses. This maximum value is digitally filtered to
guarantee stable conditions (burst spikes have no effect). This approach combines a fast adaptation to
changing signal amplitudes with a high detection safety. The receiver delivers the positive and negative pulses
to the ASIC’s logic. The logic resets the comparators after receiving with the REC_RESET signal. When the
receiver is turned on the transmitter is turned off to reduce the power consumption.
4.4. Transmitter
The transmitter draws a modulated current between the ASI+ and ASI- pins to generate the communication
signals. The shape of the current corresponds to the integral of a sin
DAC and a high current driver. This driver must be activated before the transmission to achieve operating
Data Sheet
October 20, 2011
Figure 4-1: Functional Block Diagram
A²SI-Light 14 / A²SI-Light 16
Low End Device AS-Interface
ASI+
ASI-
© 2011 Zentrum Mikroelektronik Dresden AG — Rev. 3.0
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.
IN
. An on-chip voltage regulator regulates the voltage at approximately 5V.
1uF
2
10uF
-shaped input pulses by a set of comparators. The maximum voltage of the first
ASIN
ASIP
CAP
100nF
0V
100nF
Protection
EEPROM
Thermal
Transmitter
Receiver
5V
GND
Supply
Power
VIN
Power on
TEST1
Reset
State Machine
DIGITAL
LOGIC
UART
Ports
OSC1
Oscillator
2
16MHz
-function. The transmitter uses a current
TEST2
OSC2
Modulation
Stages
Stages
Stages
Stages
Output
Output
Pulse
Width
Input
Input
A²SI-L
24V
DO0
DO1
FID
DI2
DI3
LED
Pin version only
Available at 16
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