EM MICROELECTRONIC
- MARIN SA
EM4095
Read/Write analog front end for 125kHz RFID Basestation
Description
The EM4095 (previously named P4095) chip is a CMOS
integrated transceiver circuit intended for use in an RFID
basestation to perform the following functions:
antenna driving with carrier frequency
AM modulation of the field for writable transponder
AM demodulation of the antenna signal modulation
induced by the transponder
communicate with a microprocessor via simple interface.
Features
Integrated PLL system to achieve self adaptive
carrier frequency to antenna resonant frequency
No external quartz required
100 to 150 kHz carrier frequency range
Direct antenna driving using bridge drivers
Data transmission by OOK (100% Amplitude
Modulation) using bridge driver
Typical Operating Configuration
Read Only Mode
RDY/CLK
1
2
3
16
15
14
-
-
-
Data transmission by Amplitude Modulation with
externally adjustable modulation index using single
ended driver
Multiple transponder protocol compatibility
(Ex: EM400X, EM4050, EM4150, EM4070, EM4170,
EM4069….)
Sleep mode 1µA
USB compatible power supply range
40 to +85°C temperature range
Small outline plastic package SO16
Applications
Car immobiliser
Hand held reader
Low cost reader
Pin Assignment
SO16
C
DC2
C
FCAP
SHD
DEMOD_OUT
MOD
C
AGND
C
DEC
VSS
RDY/CLK
ANT1
DC2
FCAP
SHD
DEMOD_OUT
MOD
AGND
CDEC_IN
CDEC_OUT
L
A
C
RES
C
DV1
C
DV2
+5V
4
5
6
7
8
EM4095
P4095
13
12
11
10
9
µP
DVDD
DVSS
ANT2
VDD
DEMOD_IN
+5V
Fig. 1
Fig. 3
Read/Write Mode
RDY/CLK
1
2
3
16
15
14
C
DC2
C
FCAP
SHD
DEMOD_OUT
MOD
C
AGND
C
DEC
+5V
L
A
C
RES
C
DV1
C
DV2
+5V
4
5
6
7
8
EM4095
P4095
13
12
11
10
9
µP
Fig. 2
Copyright
2002, EM Microelectronic-Marin SA
1
www.emmicroelectronic.com
EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
