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ATMEL Corporation - Low-Current Superhet Remote Control Receiver

Numéro de référence U4311B
Description Low-Current Superhet Remote Control Receiver
Fabricant ATMEL Corporation 
Logo ATMEL Corporation 





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U4311B fiche technique
U4311B
Low-Current Superhet Remote Control Receiver
Description
The U4311B is a monolithic integrated circuit in bipolar
technology for low-current UHF remote control super-
heterodyne receivers in amplitude- or frequency-
modulated mode. Typical applications are keyless car
lock-, alarm- or tele-control remote indication systems.
Especially for automotive applications, it supports a
superhet design with about 1 mA total current
consumption as required by the car manufacturers.
Features
D Usable for amplitude- and frequency-modulated
transmission systems
D Extremely low quiescent current (approximately
1 mA in standby mode due to wake-up concept)
D Wide power supply voltage range 3 to 13 V
D Sensitive IF amplifier for 10.7-MHz operating
frequency
D Logarithmic AM demodulator
D FM demodulator
D Monoflop exit to wake up a microcontroller
D High-performance operational amplifier to realize a
data recovering filter
D Non-inverting clamping comparator with amplitude-
depending hysteresis for data regeneration
Block Diagram
Wake-up out
VRef = 2.4V 13
VS
15
Bandgap
11
Internal
VRef = 2.4 V
10 3 7 6
Monoflop
RF
Level
Wake up
Non – invert.
clamping
comparator
5 Data out
10.7 MHz
9
4
IF
amplifier
Quadrature
detector
Operational
amplifier
2
8 12
log AM out
14 16
FM out
+
1
95 9968
10.7 MHz
Data
filter
Ordering Information
Extended Type Number
U4311B-M
U4311B-MFL
Figure 1. Block diagram
Package
DIP16
SO16L
Remarks
Rev. A3, 28-Sep-00
1 (15)
Free Datasheet http://www.datasheet-pdf.com/

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