Low frequency RFID transponder supports data rates from 64 kb/s to 1 kb/s

July 02, 2012 // By Julien Happich
Atmel's low-frequency (LF) RFID transponder device, the ATA5577M1330C-PP is designed for applications in building access control systems, industrial automation, consumer and industrial segments, and as tokens, key fobs or transponders.

The device is a stand-alone, fully functional tag that includes an antenna coil trimmed to an operating frequency of 125 kHz. It provides the highest flexibility for universal use, supporting a broad range of data rates from RF/2 to RF/128 (64 kBit/s to 1 kBit/s at 125 kHz), modulation and a variety of coding schemes including ASK, FSK, PSK, Manchester, Bi-phase and NRZ.

The Atmel-patented digital analog front end register (AFE) enables the chip's analog front end circuitry to adapt to the transponder and reader system for maximum performance. The chips' analog behavior can be tuned in a closed and sealed transponder for increased performance. By eliminating the need to open the transponder for tuning, the on-chip AFE register helps simplify the design and production process significantly.

The transponder is available in a standard lead-free zero-pin brick package, which is also used by other Atmel IDIC family members. The package molding makes the transponder very robust so that it can be used in rugged environments that are challenging for competing RFID devices, including underwater, on metal or in dirt.

The on-chip memory contains an Atmel-pre-programmed unique ID (UID) in two additional memory blocks. These locked blocks guarantee a unique, worldwide traceable Atmel number consisting of the Atmel lot number, wafer lot and sequential die number. This makes the device well suited for use in applications that only require a low, basic level of security, while at the same time ensuring compatibility with all kinds of existing RFID systems. The ISO11784/ ISO11785 code structure, along with the de-facto-standard-unique format, can be configured according to the requirements of specific 125kHz applications. The transponder comes in a 12- x 5.9- x 3-mm brick package.