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Features
* * * * * * *
Low-power, Low-voltage CMOS Rectifier, Voltage Limiter, Clock Extraction On-chip (No Battery) Small Size Factory Laser Programmable ROM Operating Temperature Range -40C to +125C Radio Frequency (RF): 100 kHz to 450 kHz Transmission options - Code Length: 128, 96, 64, 32 bits - Bitrate [bit/s]: RF/8, RF/16, RF/32, RF/40, RF/50, RF/64, RF/80, RF/100, RF/128 - Modulation: FSK, PSK, BIPH, Manchester, BIPH-FSK * FDX-B Compatible Coding Possible (ISO 11784/ ISO 11785)
Figure 1. Application
RF transmitter and interrogator
128-bit Read-only IDIC for RF Identification e5530
IDIC RF ID
e5530
Description
The e5530 is part of a closed coupled identification system. It receives power from an RF transmitter which is coupled inductively to the IDIC. The frequency is typically 100 kHz to 450 kHz. Receiving RF, the IDIC responds with a data stream by damping the incoming RF via an internal load. This damping-in-turn can be detected by the interrogator. The identifying data are stored in a 128-bit PROM on the e5530, realized as an array of laser-programmable fuses. The logic block diagram for the e5530 is shown in figure 2. The data are output bit-serially as a code of length 128, 96, 64 or 32 bits. The chips are factory-programmed with a unique code.
Figure 2. Block Diagram
Analog front end Load Mod Modulator FSK PSK BIPH Manchester Data
Row decoder
Coil
Clock extractor
Clk
R7 R6 R5 R4 R3 R2 R1 R0
128-bit PROM
Coil
Rectifier Bitrate VDD VSS
A2 A1 A0
A6 A5 A4 A3
Counter
C15 C14 C13 C12 C11 C10 C9 C8 C7 C6 C5 C4 C3 C2 C1 C0
Column decoder
Rev. 4508B-RFID-02/02
1
Chip Dimensions
Figure 3. Chip Size
0.175 mm Coil 2 1 2 e5530 3 4 6 8 Coil 1
Figure 4. Pinning SO8
0.447 mm
1.17 mm
Coil 1
e5530
7
Coil 2
Pad: 150 x 150 (Metal: 99% Al, 1% Si Padwindow: 138 x 138
1.62 mm
Thickness: 15 mils
5
Note: Pins 2 to 7 have to be open. They are not specified for applications
Name Coil1 Coil2
Pad Window 138 x 138 m2 138 x 138 m2
Function 1st coil pad 2nd coil pad
Functional Description
Read Operation
After power up, once the e5530 has detected the incoming RF field, the IC continuously transmits the identification code as long as the RF signal is applied. The transition from the last bit to bit 1 of the next sequence occurs without interruption. Data is transmitted by damping the incoming RF signal by an internal load. These load changes are detected by the reader station. Different kinds of modulation and bitrates are optionally available.
Rectifier
For internal power supply, an on-chip bridge rectifier is used which consists of two diodes and two n-channel transistors. A Zener diode, which protects the circuit against overvoltage on the coil inputs, and a smoothing capacitor for the internal supply are also provided. Incoming RF will be damped by the power consumption of the IC itself and by an internal load, which is controlled by the modulator. The loads are p-channel transistors connected between VDD and the coil inputs. The IDIC includes mask options for the load circuit: single-side, double-side and alternate-side modulation. There are four modulation methods available which can be selected by fuses. The corresponding timing diagram is shown in Figure 5.
Damping Load
2
e5530
4508B-RFID-02/02
e5530
FSK Modulation PSK Modulation
Logical data "1" and "0" are represented as two different frequencies of damping. The frequency for "1" is RF divided by 10, a "0" divides RF by 8. The external coil is damped with a carrier frequency of RF/2. A logical "1" causes (at the end of the bit period) a 180 phase shift on the carrier frequency, while a logical "0" causes no phase shift. Logical "1" produces a signal which is the same as the internal bitclock. A logical "0" produces no signal change in the middle of the bit period. A logical "1" causes a rising edge in the middle of a bit period (i.e., switch damping off), while a logical "0" causes a falling edge (i.e., switch damping on). A combination of Biphase- and FSK-modulation is also optionally available. The available combinations between the modulation types and the bitrates are shown in Table 1 "Transmission Options". Table 1. Transmission Options
Modulation FSK Carrier Frequency (CF) RF/8, RF/10 Bitrate [bit/s] RF/32, RF/40, RF/50, RF/64, RF/80, RF/100, RF/128 CF/4, 8, 16, 32 RF/8, RF/16, RF/32, RF/64, RF/100, RF/128 RF/8, RF/16, RF/32, RF/64, RF/100, RF/128
Biphase Modulation Manchester Modulation
PSK Biphase Manchester
RF/2
Figure 5. Timing Diagram for Modulation Options
BitClk Data 1 0 1 1 0 0 1
FSK
PSK
Man
Biph
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4508B-RFID-02/02
Reading Distances
The e5530 is able to operate from very weak fields. Nevertheless, there are some general rules which influence the achievable reading distance. * * * Best results are accomplished when the transponder points towards the reader coil. The transponder should not be embedded in metal, which will reduce the applicable magnetic field and thus the reading distance. The strength of the generated magnetic field and the sensitivity of the demodulator are the most important factors for a good reading distance.
Figure 6. Example for a 64-bit Code
E6 00 00 00 10 2D 72 5D
Header
56-bit ID code
The identification code is transmitted continously. After the RF field is applied, the e5530H-232 starts with the first bit (MSB) of the header byte 'E6hex' ('1110 0110'), followed by a unique 56-bit serial number. No checksum is included in this sample code. Pulsing the RF field may reduce the synchronization task as the first byte transmitted is known already (i.e., E6hex). This is even feasible, if the first bit may be lost due to reader synchronization problems.
Customer ID Code Selection Modes of Operation - Options
In general the customer may choose any ID code suitable to his application. To avoid code duplication, Atmel will define a fixed header - i.e, the first 8 bits of the code - for each customer. For any new product variant, the customer has to select the following operation options which are configured in the laser ROM as well: * * * Bitrate, which is defined as field clocks per bit (e.g., RF/40 = 125 kHz/40 = 3.125 kBit/s) (see table Table 1 "Transmission Options") Modulation method (see Figure 5) Code length: 32, 64, 96 or 128 bits
For programming the ID code into the laser ROM, one of the following data has to be supplied: * * ID code algorithm which is implemented in Atmel's code management software (Atmel will generate the codes as requested) Customer generated ID codes on floppy disk or per email/ftp. - - - - - The ID code file is a plain ASCII text file. The code files should be compressed. Please make self extracting files. The code files are used in alphabetical order of their file names (including letters and numbers). Used - i.e. programmed - code files are discarded. Each line of the code file must contain one ID code for one IC. The code is in hexadecimal format. The code may contain spaces for better readability.
The format has to comply to the following rules:
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e5530
4508B-RFID-02/02
e5530
- - - - - - The code line is exactly as long as the selected code length (e.g. 64 bits 16 hex numbers). The line must end with a carriage return. The first 8 bits are fixed, this is the unique customer header which is defined by Atmel. Each hexadecimal code entry must be preceded by a decimal serial number. Serial number and code must be separated by a space. The serial number has to be unique and is up-counting to avoid double programming. The series numbers of two consecutive files (file name!) has to count also for proper linking.
Figure 7. Example of Two Code Files with Header = E6 and 64-bit Code Length
FILE0000.TXT 00001 00002 00003 ... ... 12345 E65F34E25801904F E634E25801904FAA E6910AG7000010FE
Code file File name
E610ABE4F9014821
Last code
Carriage return 8-bit header Space necessary Series number
FILE0001.TXT 12346 E6A04EB73087FCC0 12347 E60178DC00F03460 ...
Next code
Absolute Maximum Ratings
Parameters Maximum current into Coil1 and Coil2 Maximum power dissipation (dice) Maximum ambient air temperature with voltage applied Storage temperature Note: Symbol Icoil Ptot Tamb Tstg Value 10 100 -40 to +125 -65 to +200 Unit mA mW (1) C C
1. Free-air condition. Time of application: 1 s Stresses above those listed under `Absolute Maximum Ratings' may cause permanent damage to the device. Functional operation of the device at these conditions is not implied.
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4508B-RFID-02/02
Electrical Characteristics
Tamb = 25C, reference terminal is VDD, operating voltage VDD - VSS = 3 V DC, unless otherwise specified
No. 1 2 3 4 5 Note: Parameters Operating voltage Operating temperature Input frequency (RF) Operating current Clamp voltage fCLK = 125 kHz, VSS = -2 V I = 4 mA Test Conditions Condition for logic test Symbol VSS Tamb fCLK ICC VCL 6.7 Min. -1.5 -40 100 3
(1)
Typ.
Max. -5.0 125 450 10
Unit V C kHz mA V
1. Typical parameters represent the statistical mean values
Figure 8. Measurement Setup for IDD
Figure 9. Simplified Damping Circuit
DD
I VDD Coil 1
100 Coil 1
~2V
~
Coil 2 VSS V pp Coil @ V 1.5
=
2V
Coil 2 100 ~2V
Mod
Application Example
Figure 10. Typical Application Circuit
From oscillator I AC 125 kHz 740 H Energy 4.05 mH 390 pF Input capacitance 5 pF static, 4 pF dynamic Coil1 (Pin 8) e5530 (SO8) Coil2 (Pin 1)
To read amplifier 2.2 nF
Data
6
e5530
4508B-RFID-02/02
e5530
Ordering Information
Extended Type Number e5530H-232-DOW e5530H-232-DIT e5530H-232-S8 e5530H-zzz-DOW (1) e5530H-zzz-DIT (1) e5530H-zzz-S8 (1) Package DOW DIT SO8 DOW DIT SO8 Modulation Data Rate Configuration Checksum Header ID Code fixed and unique code SPQ (Minimum Volume) 10 kpcs 10 kpcs 1120 Minimum Order Volume 10 kpcs 10 kpcs 1120 > 600 kpcs p.a. > 600 kpcs p.a. > 400 kpcs p.a.
Manchester
RF/32
64-bit
no checksum
E6
defined by customer
Note:
1. 1) Definition of customized part number basing on orders for first year volume (300 kpcs) 2) Definition of header, ID code, checksum etc. according to customers data base 3) 5.000 US$ initial cost for customer specific laser-fusing 4) Lead time 3 month 5) Low volume customized applications may be covered by TK5551-PP programming. With identical features of TK5530H-zzz-PP possible
Order Code
The full order code for the e5530is e5530H-zzz-pkg or e5530G-zzz-pkg, where zzz is a customer specific number defined by Atmel. pkg (package) defines the delivery form: - DOW - DIT - S8 factory programmed, tested unsawn, backlapped (15 mils) wafers cutted chips in wafflepack (Dice In Tray) SO8-packaged parts
Samples: Atmel supplies e5530 samples, which are set to Manchester modulation at RF/32 with a 64-bit ID code (order code: e5530H-232 S8)
Package Information
Package SO8
Dimensions in mm
5.00 4.85 1.4 0.4 1.27 3.81 8 5 0.25 0.10 0.2 3.8 6.15 5.85 5.2 4.8 3.7
technical drawings according to DIN specifications
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4
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4508B-RFID-02/02
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(c) Atmel Corporation 2002. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life support devices or systems. Atmel (R) and IDIC(R) are the registered trademarks of Atmel. Other terms and product names may be the trademarks of others. Printed on recycled paper.
4508B-RFID-02/02 xM

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