RFID Testlab MIFARE® Certification Institute Document Nr. 9001-6
Reference PICC V2
PCB part number: 9001-6
1. Application and standards information This printed circuit board is suitable for the following standards and applications: Application
Reference device specification
Standard Clause
Test procedure
Clause
Annex
8.1
Hmin, Hmax test
6.3.1
annex D
8.2
Power transfer
6.3.1
annex D
7.4
Class 1 – PICC maximum loading effect test
7.4.2
annex D
ISO/IEC 10373-7
8.1
VCD field strength and power
6.3.1
annex D
ISO/TR 18047-3
6.2.4
Interrogator field strength and power transfer test
6.2.2.4
annex E
ECMA-356
9.1
Initiator field strength in active and passive communication mode
7.3
annex C
ISO/IEC 10373-6
Note:
"Reference PICC for modulation index and waveform test" according to ISO/IEC 10373-6 (clause 6.3.2 and annex I) is a different PCB, part number 9001-7.
2. Printed circuit board layout PCB part number: 9001-6 Board size: Coil size:
54 mm x 172 mm 42 mm x 72 mm outside dimensions, 4 turns, track width and spacing 0.5mm
RFID Testlab MIFARETM Certification Institute Document Nr. 9001-6 rev. 2.4
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Antenna coil Connections for high impedance voltmeter to measure VDC Notes:
a) R2A, R2B and R2C are for use as Reference PICC according to ISO/IEC 10373-6 or Reference device according to ECMA-356. R2B and R2C can be used replacing R2A to reduce the adjustment range for easier calibration. b) R3, R4 and J2 are for use as Reference VICC according to ISO/IEC 10373-7 or Reference tag according to ISO/TR 18047-3 only. Jumper J1 has to be set to position 'a' always.
3. ISO/IEC 10373-6 Reference PICC and ECMA-356 Reference device 3.1 Schematic and parts list
C1 L
D1
D2
D3
D4 C3
C2
R2B R2C
DZ1 a
RFID Testlab MIFARETM Certification Institute Document Nr. 9001-6 rev. 2.4
R2A
R1
VDC
b J1
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Reference Part
Value
SMD Case
Notes
not fitted
0805
for fres = 19 MHz
33 pF
0805
for fres = 13.56 MHz
L
Printed antenna coil
C1
Capacitor, ceramics
C2
Trim-Capacitor
5 - 20 pF
C3
Capacitor, ceramics
10 nF
1206
D1 – D4
Schottky Diode
BAR 43
SOT 23
DZ1
Zener Diode
BZX84C15 SOT 23
R1
Resistor
1.8 kOhm
1206
1 kOhm
Bourns 3314J for Hmin test
100 Ohm
Bourns 3314J for Hmax test
2 kOhm
Bourns 3314J
R2A
Trim-Resistor
Murata TZC3P200A
see ISO/IEC 10373-6, annex D
R2B
Trim-Resistor
see text
Bourns 3314J
R2C
Resistor
see text
1206
for "Class 1 - PICC maximum loading effect test" alternatively to R2A
3.2 Application notes Since the required resonance frequency depends on the application, it is strongly recommended to use specific Reference PICCs tuned to the desired application, instead of varying C1 and C2. This results in having a set of Reference PICCs like in the following table: Part-number
Application
ISO/IEC 10373-6 clause
resonance frequency
load resistor adjustment
9003-4
Hmax
8.1.2
19 MHz
R2 (tuned for 3 VDC at Hmax)
9003-1
Hmin
8.1.2
13.56 MHz
R2 (tuned for 3 VDC at Hmin)
9003-4
Power transfer
8.2.2
19 MHz
R1 = 1.8 kOhm
9003-6
Class 1 max. loading effect
7.4
13.56 MHz
R2 (tuned for 6 VDC at Hmin)
This allows also tightening the adjustment range of the load resistor R2 to make adjustment easier and more precise by splitting R2 into a smaller variable resistor R2B and a fixed resistor R2C, connected in series.
RFID Testlab MIFARETM Certification Institute Document Nr. 9001-6 rev. 2.4
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Typical values are: Reference Part
Value
SMD Case
R2B
Trim-Resistor
100 Ohm
Bourns 3314
R2C
Resistor
390 Ohm
1206
R2B
Trim-Resistor
10 Ohm
Bourns 3314
R2C
Resistor
75 Ohm
1206
Application for Hmin test PICC
for Hmax test PICC
3.3 Tuning of resonance frequency 3.3.1 ISO/IEC 10373-6: According to ISO/IEC 10373-6 amendment 2, the resonance frequency of the Reference PICC shall be adjusted with jumper J1 in position "a" (1.8 kOhm load resistor) using a signal generator connected to a Calibration Coil (one turn coil defined in clause 6.1) which is closely coupled to the Reference PICC and using the following procedure: a) Set jumper J1 to position "a". b) Drive the calibration coil directly from a signal generator set at the required frequency (13.56 MHz or 19.0 MHz). c) Locate the calibration coil and the Reference PICC as close as possible with the axes of the two coils being congruent. d) Adjust the Reference PICC capacitor C2 to maximum dc voltage at R1. e) Assure final reading of about 3 Volts (dc) at R1 of the Reference PICC by adjusting the generator drive level. f) Re-adjust the Reference PICC capacitor C2 to maximum dc voltage at R1, if necessary." 3.3.2
ECMA-356:
The tuning of the resonance frequency is not exactly defined in ECMA-356. There is only the following note: The resonant frequency of the Reference device is measured by using an impedance analyser or a LCR-meter connected to a calibration coil. The coil of the Reference device should be placed on the calibration coil as close as possible, with the axes of the two coils being congruent. The resonant frequency is obtained when the resistive part of the measured complex impedance is at maximum. Since particularly for Hmax case, the resonance frequency cannot be measured reliably because of the low load resistance, it is suggested to measure the resonance frequency RFID Testlab MIFARETM Certification Institute Document Nr. 9001-6 rev. 2.4
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always with jumper J1 in position "a" (1.8 kOhm load resistor). This is in line with a comparable situation in ISO/IEC 10373-6. Alternatively the method described in ISO/IEC 10373-6 amendment 2 may be used (see above).
3.4 Adjustment of R2 After the resonance frequency is adjusted the Reference PICC shall be calibrated for the requested application: g) Set jumper J1 to position "b" h) Calibrate the Test PCD assembly to produce the required magnetic field strength (Hmin or Hmax) on the calibration coil. i) Adjust R2 to obtain the required VDC (3 V or 6 V dc) across it measured with a high impedance voltmeter. Verify the operating field condition by monitoring the voltage on the calibration coil.
Typical values for R2:
Application
ISO/IEC 10373-6 resonance clause frequency
Typical R2 range
Hmax
8.1.2
19 MHz
75 ……... 85 Ohms
Hmin
8.1.2
13.56 MHz
400 ……550 Ohms
Power transfer
8.2.2
19 MHz
---
Class 1 max. loading effect
7.4
13.56 MHz
900 ….1000 Ohms
Note:
R2 can be fitted either as a single adjustable R2A or an adjustable R2B with a fixed R2C in series, to reduce the adjustment range for easier calibration.
RFID Testlab MIFARETM Certification Institute Document Nr. 9001-6 rev. 2.4
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4. ISO/IEC 10373-7 Reference VICC and ISO/TR 18047 Reference tag 4.1 Schematic and parts list
R3 C1
D1 R4
D2
D3
D4
C2 a
L
b J2
C3
R1 a
Reference Part
VDC
DZ1 b J1
Value
SMD Case
Notes
0805
for fres = 13.56 MHz
L
Printed antenna coil
C1
Capacitor, ceramics
33 pF
C2
Trim-Capacitor
5 - 20 pF
C3
Capacitor, ceramics
10 nF
1206
D1 – D4
Schottky Diode
BAR 43
SOT 23
DZ1
Zener Diode
BZX84C15
SOT 23
R1
Resistor
100 kOhm
1206
R3
Resistor
10 kOhm
1206
adjust for Hmin = 0,15 A/m 1)
R4
Resistor
91 Ohm
1206
adjust for Hmax = 5,0 A/m 1)
Notes:
Murata TZC3P200A
see ISO/IEC 10373-6, annex D
1
) Hmax and Hmin values according to ISO/IEC 15693 and ISO/IEC 18000-3
RFID Testlab MIFARETM Certification Institute Document Nr. 9001-6 rev. 2.4
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4.2 Application notes The coil size of 42 mm x 72 mm complies with ISO/IEC 10373-7:2008. The following table gives a summary of Reference Devices covered by this document: Part Numer
Application clause
resonance frequency
J2 jumper load resistor adjustment position
9003-12
Hmax
ISO/IEC 10373-7
13.56 MHz
a
R4 (tuned for 3 VDC at Hmax)
9003-12
Hmin
ISO/IEC 10373-7
13.56 MHz
b
R3 (tuned for 3 VDC at Hmin)
9003-32
Hmax
ISO/IEC TR 18047-3
13.56 MHz
a
R4 (tuned for 3 VDC at Hmax)
9003-32
Hmin
ISO/IEC TR 18047-3
13.56 MHz
b
R3 (tuned for 3 VDC at Hmin)
4.3 Tuning of resonance frequency The resonance frequency of the Reference Device can be adjusted with variable capacitor C2, having jumper J2 in position "a" (R3 load resistor). According to a note in ISO/IEC 10373-7 a RLC-meter can be used connected to a Calibration Coil (one turn coil defined in clause 6.1) which is coupled to the Reference Device at a distance of 10 mm between the planes of the two coils. Another possible procedure is using a signal generator as described in ISO/IEC 10373-6. A spacing of 10 mm should be kept between the coils to reduce stray capacitance. The procedure is as follows: a) Set jumper J2 to position "a". b) Drive the calibration coil directly from a signal generator, set at the required frequency (13.56 MHz). c) Locate the Calibration Coil and the coil of the Reference Device in parallel at a distance of 10 mm with the axes of the two coils being congruent. d) Adjust the Reference Device capacitor C2 to maximum dc voltage at R1. e) Assure final reading of about 3 Volts (dc) at R1 of the Reference Device by adjusting the generator drive level. f) Re-adjust the Reference Device capacitor C2 to maximum dc voltage at R1, if necessary.
RFID Testlab MIFARETM Certification Institute Document Nr. 9001-6 rev. 2.4
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4.4 Adjustment of R3 and R4 After the resonance frequency is adjusted the Reference Device shall be calibrated for the requested application: a) Set jumper J2 to position "a" (R3) for Hmin or to position "b" (R4) for Hmax. b) Calibrate the Test Assembly to produce the required magnetic field strength (Hmin or Hmax) at the calibration coil. c) Adjust R3 (or R4) to obtain the required VDC (3 V dc) at the output pins measured with a high impedance voltmeter. Verify the operating field condition by monitoring the voltage on the calibration coil. Typical ranges for values of R3 and R4 are: R3: R4:
3.3 …… 11 kOhm 82 ……100 Ohm
RFID Testlab MIFARETM Certification Institute Document Nr. 9001-6 rev. 2.4
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