EM4094 Datasheet, PDF (1/1 Pages) EM Microelectronic - MARIN SA – Analog Front End Integrated Circuit for 13.56Mhz RFID Base Station

EM MICROELECTRONIC - MARIN SA
EM4094
Analog Front End Integrated Circuit for
13.56MHz RFID Base Station
General Description
The EM4094 is an integrated analog system for
13.56MHz RFID reader system. It is highly versatile so it
can be used in different reader systems having
sub-carrier frequencies from 212KHz to 848KHz, hence
covering ISO 14443 and ISO 15693 standards.
The adaptability is achieved using a 3 wires serial
interface to program the system option bits.
The transmitter generates 200 mW output power into
50Ω load and is capable of OOK or ASK modulation.
Applications
Low cost reader solution
Hand held reader
Typical Application
Features
ISO 15693 & ISO14443 compatibility
Oscillator using 13.56MHz Quartz with selectable
transconductance (gm).
Antenna driver using OOK or ASK modulation using
single antenna driver
ASK modulation adjustable in range from 7% to 30%
High output power 200mW from 5V supply
Antenna short circuit protection
Multiple receiver input for high communication
reliability
AM/PM demodulation with AGC signal amplifier
848KHz BPSK internal decoder (type B)
Multiple sub-carrier receiving compatibility
(212kHz, 424kHz and 848kHz)
Multiple sub-carrier coding compatibility
(Manchester, BPSK)
Built-in receive low-pass filter cut-off frequency
selectable between 400kHz and 1MHz
Built-in receive high-pass filter cut-off frequency
selectable between 100kHz, 200kHz and 300kHz
Selectable receive gain
Serial 3 pin interface for option selection
Power down mode controlled by the 3 wires SPI
Output Power: 200mW for a SO20w Package
100mW for a SO16w Package
Operation temperature range -40°C to +85°C
ANTENNA
COAX
VCC
C10
C8
C7
VCC
C9
C6
C5
L1
C3
C4
VDDA1
VDD
VSSA1
VSS
VDDA2
AGD
VSSA2
ANT1
ANT2
RFIN2
EM4094
EN
DIN
DCLK
DOUT
DOUT1
RFIN1
OSCOUT
Y1
OSCIN
C1
C2
VCC
C12
C13
C11
uController
Interface
Figure 1
Copyright  2003, EM Microelectronic-Marin SA
Subject to change without notice
Rev. A, 09/03
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