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Features
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Low-power, Low-voltage CMOS Rectifier, Voltage Limiter, Clock Extraction On-chip (No Battery) Small Size Factory Laser Programmable ROM Operating Temperature Range -40°C to +125°C 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 µ x 150 µ (Metal: 99% Al, 1% Si Padwindow: 138 µ x 138 µ
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 × 138 µm2 138 × 138 µm2
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 th.