EM MICROELECTRONIC
- MARIN SA
EM4083
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.
Key Features
115kHz –140kHz Frequency Bandwidth
3 antennas interface for 3D reception
Ultra low current consumption
<
2µA
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.
-40°C to +85°C Temperature range.
3V power supply battery
TSSOP16 package.
Applications
Keyless entry systems
Tire pressure systems
Intelligent sensors
Intelligent access control
Pinout
Vss
SO
ASK
Wakeup_n
RSSI
Coil3b
Coil3a
Coil2b
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Sclk
Si / Reset
SS_n
Vbat
Vilt
Coil1a
Coil1b
Coil2a
& 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
V
Bat
Wakeup n
ASK
ss_n
EM4083
LF Uplink
(up to 2.5m)
LF
Transmitter
V
SS
Control
Unit
HF Downlink
RF
Receiver
RF
Emitter
V
Filt
SI
Sclk
So
Microcontroller
EM6640
or
EM6812
IRQ
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
EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
