EM4083 Datasheet, PDF (1/1 Pages) EM Microelectronic - MARIN SA – 3D Active Long Range Front-End

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.
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 < 2µA
High sensitivity (1mVpp)
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.
Vss 1
SO 2
ASK 3
Wakeup_n 4
RSSI 5
Coil3b 6
Coil3a 7
Coil2b 8
16 Sclk
15 Si / Reset
14 SS_n
13 Vbat
12 Vilt
11 Coil1a
10 Coil1b
9 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
LF
Transmitter
Control
Unit
RF
Receiver
LF Uplink
(up to 2.5m)
HF Downlink
V_Bat
Wakeup n
ASK
ss_n
EM4083 SI
Sclk
So
V_SS
V_Filt
IRQ
Microcontroller
EM6640
or
EM6812
RF
Emitter
Copyright  2003, EM Microelectronic-Marin SA
Subject to change without notice
Rev. A/xxx, 06/03
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www.emmicroelectronic.com
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