Ultrasonic Transmitter / Receiver
Ultrasonic Transmitter / Receiver
UTR2
Ultrasonic Transmitter / Receiver
General description
The UTR2 is an hybrid circuit that allows to
realize an
ultrasonic detector adding few
external components.
Detection is based on amplitude variation of received
ultrasonic signal (40KHz) due to the movement of an
object.
It shows stable electric characteristics thanks to
the
"Thick film hybrid" tecnhology.
Features
Applications
•
•
•
•
•
AC Input Amplifier with Automatic Gain Control
Output Relay Driving with Ricirculation Diode
BLOCK
DIAGRAM
Cext
2
6
TP1
3
5
TRM1
8
TRM2
Car Alarm systems
Residential and commercial security systems
Automatic doors opening systems
9
VCC2
TP2
7
11
VCC3
VCC
10K
RXC
1
TXC
14
AGC
Ultrasonic
Amplifier
Ultrasonic
Oscillator
GND
4
OUT
Subsonic
Frequency
Detector
15
Low
Frequency
Oscillator
40 KHz
DIL
12
1K
LED
13
Electrical Characteristics
CHARACTERISTICS
Ta = 25°C unless otherwise specified
MIN
TYP
MAX
UNIT
9
12
16
VDC
VCC
Supply Voltage
IS
Supply Current
15
mA
G
Utrasonic Amplifier Gain
50
dB
FU
Ultrasonic Frequency
IO
Out2 Sink Current
TOP
Operating Temperature Range
38
-20
Pin Description
1
RXC
2
3
4
5
6
7
8
9
10
11
12
13
14
Cext
TRM1
GND
TRM2
TP1
VCC3
VCC2
TP2
INS
VCC
DIL
LED
TXC
15
OUT
40
42
KHz
20
mA
+80
°C
Mechanical Dimensions
Ultrasonic Piezoceramic
Receiver Input (RXCAP)
Supply Voltage External Capacitor
External Trimmer
Ground
External Trimmer
Test Point
Supply Voltage of output stage
Supply Voltage of internal stage
Test Point
Internal signal: not to be connect
External Supply Voltage
Disable signal LED control: active Low
LED control signal
Ultrasonic Piezoceramic
Transmitter Output (TXCAP)
OUT="LOW" if Objet is moving
38.1mm
Components Side
1 2
15.24mm
15
1mm
2.54mm
TYPICAL APPLICATION
10uF
100K
10uF
TX
CAP
+
5.1V
2
RX
CAP
+
+
1
14
6
3
5
AGC
Ultrasonic
Amplifier
Ultrasonic
Oscillator
8
9
Subsonic
Frequency
Detector
11
15
TX CAP : MA40S3S Murata
RX CAP : MA40S3R Murata
40 KHz
Low
Frequency
Oscillator
UTR2
4
7
VCC
13
12
Component typical values
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