EM4083
Copyright
2003, EM Microelectronic-Marin SA
Subject to change without notice
Rev. A/xxx, 06/03
Phone: +41.32.755-5111, Fax: +41.32.755-5403
www.emmicroelectronic.com
info@emmicroelectronic.com
3D Active Long Range Front-End
General Description
The EM4083 is a CMOS integrated circuit intended for
hands-free or multidimensional wireless communication
systems at 125kHz.
It integrates a high sensitivity low frequency AM receiver
together with digital functions accessible through a Serial
Standard Interface.
EM4083 provides a wake-up signal to an external
microcontroller upon reception of a valid programmable
header and then a high-speed data transfer and decoding for
long range applications at 125kHz.
Applications
Keyless entry systems
Tire pressure systems
Intelligent sensors
Intelligent access control
Pinout
Key Features
115kHz 140kHz Frequency Bandwidth
3 antennas interface for 3D reception
Ultra low current consumption
< 2A
High sensitivity (1mV
pp
)
More than 2.5m distance in typical applications.
32x16 bits EEPROM (432 bits user memory).
On Chip capacitors for antenna tuning
On Chip resistor for Antenna Quality Factor tuning
4 wires Microcontroller Serial interface (SPI).
8 bits (EEPROM programmable) Header detection.
Manchester data decoder (data rate 4Kbd).
Data transmission performed by 100% amplitude
modulation (OOK) in Up-Link.
-40C to +85C Temperature range.
3V power supply battery
TSSOP16 package.
& BENEFITS
Long and accurate communication range
Extended battery life of the system
Accurate Antenna Tuning using the Receive Strength
Signal Indicator function
Minimal use of external components
Typical Application
EM4083
Microcontroller
EM6640
or
EM6812
Wakeup n
ASK
ss_n
SI
Sclk
So
IRQ
V
Bat
V
SS
V
Filt
RF
Emitter
LF
Transmitter
Control
Unit
RF
Receiver
HF Downlink
LF Uplink
(up to 2.5m)
EM MICROELECTRONIC
- MARIN SA
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Vss
SO
ASK
Wakeup_n
RSSI
Coil3b
Coil3a
Coil2b
Sclk
Si / Reset
SS_n
Vbat
Vilt
Coil1a
Coil1b
Coil2a
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