EM EM4006F9WS21E 13.56 mhz 64 data bit read only contactless identification device Datasheet

EM MICROELECTRONIC - MARIN SA
EM4006
13.56 MHz 64 Data bit Read Only Contactless
Identification Device
Description
Features
The EM4006 (previously named H4006) is a CMOS
integrated circuit intended for use in electronic Read Only
transponders.
The exited coil connected to the device generates the
power supply via a rectifier and an integrated decoupling
capacitor. The clock used for the logic is also extracted
from the coil. The logic is mainly composed by a miller
code generator and the LROM control. The memory is
factory programmed so that each IC is unique.
Operating frequency range 10 MHz to 15 MHz
RF interface optimized for 13.56 MHz operation
Laser programmed memory array
(64 data bit + 16 CRC bit)
Modulator switch designed to preserve supply voltage
Miller coding
Default data rate is 26484 Baud
Other data rates possible (mask programmable)
On chip rectifier
On chip resonant capacitor
On chip supply buffer capacitor
Applications
VDD
TOUT
TESTn
Pad Assignment
VSS
Typical Operating Configuration
Logistics automation
Anticounterfeiting
Access control
Industrial transponder
Coil1
EM4006
EM4006
Coil2
L: typical 1.4µH for fo = 13.56MHz
C1
Fig. 2
Fig. 1
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C2
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EM4006
Absolute Maximum Ratings
Parameter
Maximum DC Current forced
on COIL1 and COIL2
Power Supply
Storage Temp. Die form
Storage Temp. PCB form
Electrostatic discharge
maximum to MIL-STD-883C
method 3015
Handling Procedures
Symbol
Conditions
ICMAX
±30mA
VDD
Tst
Tst
-0.3V to 7.5V
-55 to +200°C
-55 to +125°C
VESD
2000V
This device has built-in protection against high static
voltages or electric fields; however, anti-static
precautions must be taken as for any other CMOS
component. Unless otherwise specified, proper operation
can only occur when all terminal voltages are kept within
the voltage range. Unused inputs must always be tied to
a defined logic voltage level.
Operating Conditions
Parameter
Operating Temp.
Stresses above these listed maximum ratings may cause
permanent damages to the device. Exposure beyond
specified operating conditions may affect device reliability
or cause malfunction.
Symb
Top
Min
-40
Typ
Maximum Coil
Current
Icoil
-10
AC Voltage on Coil
Vcoil
3
14*
Supply Frequency
fcoil
10
13.56
Max Units
+85
°C
10
mA
Vpp
15
MHz
*) The AC Voltage on Coil is limited by the on chip
voltage limitation circuitry. This is according to the
parameter Icoil.
System Principle
Transponder
Tranceiver
Coil1
Oscillator
Antenna
Driver
EM4006
Coil2
Filter
and
Gain
Data decoder
Demodulator
Data received
from transponder
Signal on coils
Transponder coil
Transeiver coil
RF Carrier
Data
Fig. 3
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EM4006
Electrical Characteristics
VDD = 2V, VSS = 0V, fC1 = 13.56MHz sine wave, VC1 = 1.0Vpp centered at (VDD - VSS)/2, Ta = 25°C
unless otherwise specified
Parameter
Symbol Test Conditions
Min.
Typ.
Max.
Supply Voltage
VDD
Supply current
IDD
1.9
60
Rectifier Voltage Drop
VREC
IC1C2 = 1mA, modulator switch on
VREC = (VC1-VC2) - (VDD - VSS)
Modulator ON DC voltage
drop (note 2)
VON1
VON2
IVDD VSS = 1mA
IVDD VSS = 10mA
Power on reset (note 3)
f=10kHz
V
150
µA
1.8
V
1.9
2.4
2.3
2.8
2.8
3.3
V
V
1.2
0.1
1.4
0.25
1.7
0.5
V
V
92.6
94.5
96.4
pF
VR
VR - VMIN
Vcoil=100mVRMS
Units
(note 1)
Coil1 - Coil2 Capacitance
CRES
Series resistance of CRES
RS
3
Ω
Power Supply Capacitor
Csup
140
pF
Note 1: Maximum voltage is defined by forcing 10 mA on C1 - C2
Note 2: Measured between VDD and VSS
Note 3: According to Figure 7
Block Diagram
Clock extractor
C1
CRES
C2
AC1
+
Sequencer
-
Miller Code
Generator
VDD
Power
on
Reset
CSUP
HF Rectifier
AC2
Divider Chain
Modulator
VSS
LASER
ROM
Power Management
Fig. 4
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EM4006
General Description
Functional Description
The transponder will be activated when illuminated by a
RF field of sufficient power and at any frequency that is
compatible with its associated antenna and its internal
power supply circuit input characteristics. The chip will
Power-on-Reset itself when powered by this incoming
energy that exceeds its reset threshold. After resetting
itself the chip will start to transmit its memory contents as
a stream of Miller code. The memory contents is
transmitted by modifying the antenna matching
impedance at its internal clock rate, thereby causing
varying amounts of RF energy to be reflected from the
antenna. This impedance variation will be achieved by
connecting a modulating device across the antenna
terminals. When switched on the modulating device will
present a low impedance to the antenna. This will cause a
change in the matching of the antenna and therefore in
the amount of RF energy reflected by the transponder to
the reader. This reflected signal combines with the
transmitted signal in the receiver to yield an amplitude
modulated signal representative of the IC memory
contents. The “ON” impedance of the modulating device
needs to be comparable to about 100 Ohms to affect the
matching of the antenna and therefore its reflectivity.
The RF signal received from the transponder antenna will
serve several purposes :
• power the chip
• provide a global reset to the chip through its POR
(Power-On-Reset) function
• provide a carrier for the data transmission
• provide the input of the internal clock generation circuit
(frequency division)
Output Sequence
Transmission from the transponder will be accomplished
through variation of the antenna load impedance by
switching the modulating device ON and OFF.
Output sequence is composed of cycles which are
repeated. Each cycle is composed of 82 bits Standard
Message Structure (STDMS) which is Miller coded and a
pause (LW) during which the modulating device is OFF
(see figure 6 for details of Miller code).
The pause (LW) is 9bits length.
The 82 bit STDMS consists of 1 start bit, 64 data bits, 16
CRC bits and 1 stop bit.
Start bit (1)
Data(64)
CRC (16) Stop bit (1) LW(9)
Memory organisation
As already mentioned above the 82 bits are stored in
laser programmed ROM (LROM). The 82 bits of this
LROM is partioned as followed (see Memory Map):
Factory reserved
IC name
Customer ID
ID code
CRC-CCITT
Start and stop bits
9 bits
10 bits
13 bits
32 bits
16 bits
2 bits
Memory Map
(First out)
0
1
Start
2
17
18
33 34
MSB
3
4
5
6
Factory reserved
19 20 21
LSB MSB
7
8
9
10 11
MSB
12
13 14
IC Name
15
16
22
23
24
25 26 27
Customer ID
28
29
30
31
32
LSB
40
43
44
45
46
47
48
35
36
37
38
39
41 42
ID code
49
50
51
52
53
54
55
56 57
ID code
58
59
60
61
62
63
64
LSB
65
LSB
66
67
68
69
70
71
72 73 74
CRC - CCITT
75
76
77
78
79
80 81
MSB Stop
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EM4006
Factory reserved bits
These 9 bits are reserved. Default value is 00Bhex.
ID code bits
This field is programmed from a counter in that way that
each device is unique.
IC name bits
They contains the 3 last characters device name. For this
device, the value is 006hex.
Cyclic redundancy check
The shift register is reset to all zero with each Stop Bit.
CRC code is calculated on 64 data bits. The CRC code is
calculated according to CCITT / ISO 3309 - 1984
standards. See figure 5 for principle block schematic and
generating polynomial of the CRC code.
Customer ID bits
This field contains a code which is defined by EM
Microelectronic-Marin S.A. For standard version, the code
is 0001hex.
Start and stop bits
Start bit is set to logic 1 and stop bit is set to logic 0.
CRC Block Diagram
SERIAL QUOTIENT
X5
X12
X16
FEEDBACK
BEFORE
SHIFT
15 14 13 12 11
10
9
8
7
6
5
4
MSB
3
2
1
0
LSB
BCC REGISTER
x
= BCC(Block Check Characters) REGISTER STAGE
data input
= EXCLUSIVE - OR
CRC-CCITT GENERATING POLYNOMIAL = X16 + X12 + X5 + X0
Fig. 5
RF Interface
Resonant capacitor, Rectifier, Limiter and Modulator
Switch form the unit which is interfacing to the incoming
RF signal. These blocks are interdependent so they are
developed as unit. They interface to the antenna which
typical characteristics are:
LS ≈ 1400 nH
RS ≈ 3 Ohms
30 < Q < 40 at 13.56 MHz.
Resonant Capacitor
The capacitor value is adjusted by laser fusing. It can be
trimmed by 1pF steps to achieve the absolute value of
94.5pF typically. This option, which is available on
request, allows a smaller capacitor tolerance over the
whole production.
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Rectifier and Limiter
A full wave rectifier (Graetz Bridge) is used to provide
supply voltage to the IC. The reverse breakdown of the
diodes is also used to protect the IC from overvoltages.
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EM4006
Modulator Switch
Due to the low impedance of the antenna and resonant
capacitor the Modulator Switch has to present low RF
impedance when switched ON (about 100 ohms).
The minimum time period with the Modulator Switch ON
is 38 µs. At lower data rates this time is even much
longer. The current consumption of divider chain running
at 13 MHz is near 60 µA. Putting together this two figures
it is clear that it is not possible to supply the IC during the
time the Modulator Switch is ON from the integrated
Supply Buffer Capacitor which value is approximately 140
pF. The IC has to get power from the RF field also during
the time the Modulator Switch is ON.
1
0
1
1
This problem is solved by putting the Modulator Switch on
the output of the Rectifier (between VDD and VSS) and
regulating its ON resistance in function of supply voltage.
When the supply voltage is high the ON impedance is low.
When the supply voltage drops near the region where the
operation of the IC at 13.56 MHz is not guaranteed the
ON impedance is increased in order to prevent further
drop.
0
0
0
1
1
0
1
NRZ-L
STREAM
DM-M
CODED
Bit i-1
x
0
1
Bit i
1
0
0
no transition at the beginning of Bit i,
transition at the beginning of Bit i,
no transition at the beginning of Bit i,
transition in the middle of Bit i
no transition in the middle of Bit i
no transition in the middle of Bit i
Fig. 6
Power Supply Management
For a correct operation, the device must be initialised.
When the transponder is put in the RF field, the supply
voltage increases until it achieves Vr limit (see Figure 7).
During this time and for an additionnal 64 bit period, the
modulator switch is on and the device initialises its
internal logic.
Copyright  2001, EM Microelectronic-Marin SA
At this point, the data transmission starts and runs while
the supply voltage is higher than Vmin. If the supply
voltage decreases under this limit, the device is again in
an initialising state and the modulator is on.
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EM4006
supply voltage
VDD
chip operating voltage range: from Vmin to Vmax
Vmax (voltage clipping)
chip supply voltage
Vr (Read wake up)
Vmin
time
modulator
ON/OFF
ON
READ
64 bits
period
OFF
time
Fig. 7
Miller Encoder
The input to Miller encoder is NRZ data coming from
LROM. The output is coded according to Miller format and
is driving the modulator Switch. See figure 6 for example
of Miller code.
Clock Generation
The clock of the logic is extracted from the RF signal. The
clock extracted from RF signal is driving the divider chain
consisting of toggle flip-flops. The output of this divider
chain is data clock with which the data from Laser ROM
(LROM) is addressed, encoded and sent to Modulator
Switch.
The layout of divider chain is designed in a way that
different data rates can be chosen with metal mask
(options).
The following division factors are possible on request:
128, 256, 1024, 2048, 4094 and 8192.
The standard is 512.
Copyright  2001, EM Microelectronic-Marin SA
Others
As mentioned in Output Sequence, during the pause (LW)
the Modulator Switch is OFF. When observing the pause
duration one has to remember that the time with
Modulator Switch OFF effectively observed can vary due
to different terminations of STDMS. The stop bit at 0 can
be represented either by Modulator Switch ON or OFF
depending on the data. The start bit at 1 adds 1/2 of data
period OFF (transition in the middle of bit period).
Figure below show the four possible terminations of
STDMS and its influence on entire period passed by
Modulator Switch OFF. Level LOW represents Modulator
Switch OFF. LDB stands for last data bit.
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EM4006
LDB
1
1
0
0
Last data
bit
Stop bit
at 0
Pause 8 +1 bit periods
Start bit
at 1
This transition is not due to Miller encoding.
Fig. 8
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EM4006
Pad Description
Name
Description
C2
connection to antenna
C1
connection to antenna
VDD
positive supply
Tout
test output
TESTn
test input with pull up
VSS
negative supply
Package Information
CID Package
PCB Package
FRONT VIEW
Y
SYMBOL
A
B
D
e
F
g
J
K
R
TOP VIEW
B
D
Z
K
J
MARKING
AREA
A
MIN
8.2
3.8
5.8
0.38
1.25
0.3
0.42
0.115
0.4
TYP
8.5
4.0
6.0
0.5
1.3
0.4
0.44
0.127
0.5
MAX
8.8
4.2
6.2
0.62
1.35
0.5
0.46
0.139
0.6
X
C2
Dimensions are in mm
R
SYMBOL MIN
TYP
X
8.0
Y
4.0
Z
Dimensions are in mm
e
C2
C1
F
F
C1
MAX
1.0
g
Fig. 9
Fig. 10
Pad position
14
325
513
772
1144
1124
1600
EM4006
316
152
740
Y
1041
X
C1, C2 pad size : 95 X 95
Other pads size : 76 X 76
All dimensions in µm
Fig. 11
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EM4006
Ordering Information
Die Form
This chart shows general offering; for detailed Part Number to order, please see the table “Standard Versions” below.
EM4006 F9 WS 11
- %%%
Version:
Customer Version:
F9 = Miller, 512 clocks per bit
%%% = only for custom specific version
Die form:
WW = Wafer
WS = Sawn Wafer/Frame
WT = Sticky Tape
WP = Waffle Pack (note 1)
Bumping:
" " (blank) = no bumps
E = with Gold Bumps
Thickness:
7 = 7 mils (178um)
11 = 11 mils (280um)
21 = 21 mils (533um)
Packaged Devices
This chart shows general offering; for detailed Part Number to order, please see the table “Standard Versions” below.
EM4006 F9 CI2L C - %%%
Version:
F9 = Miller, 512 clocks per bit
Customer Version:
%%% = only for custom specific version
Package:
CI2L = CID Pack, 2 pins (length 2.5mm)
CB2R = PCB Package, 2 pins
Delivery Form:
B = Tape
C = Bulk
Remarks:
•
For ordering please use table of “Standard Version” table below.
•
For specifications of Delivery Form, including gold bumps, tape and bulk, as well as possible other delivery form or
packages, please contact EM Microelectronic-Marin S.A.
•
Note 1: This is a non-standard package. Please contact EM Microelectronic-Marin S.A for availability.
Standard Versions:
The versions below are considered standards and should be readily available. For other versions or other delivery form,
please contact EM Microelectronic-Marin S.A. Please make sure to give complete part number when ordering (without
space between letters).
Part Number
Bit
Cycle/
coding
bit
Package/Die Form
Delivery
Form /
Bumping
For EM internal use
only
old version
OPS#
EM4006 F9 CB2RC
Miller
512
PCB Package, 2 pins
bulk
501
2878
EM4006 F9 CI2LC
Miller
512
CID package, 2 pins (length 2.5mm)
bulk
501
2930
EM4006 F9 WP7
EM4006 F9 YYY-%%%
Miller
Miller
512
512
Die in waffle pack, 7 mils
custom
no bumps
custom
501
%%%
3669
Product Support
Check our Web Site under Products/RF Identification section.
Questions can be sent to [email protected]
EM Microelectronic-Marin SA cannot assume responsibility for use of any circuitry described other than circuitry
entirely embodied in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to
change the circuitry and specifications without notice at any time. You are strongly urged to ensure that the
information given has not been superseded by a more up-to-date version.
© EM Microelectronic-Marin SA, 01/02, Rev. C/404
Copyright  2001, EM Microelectronic-Marin SA
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