Passive Components


Locally produced passive RFID chips

9 May 2001 Passive Components

SAMES has introduced a new family of passive RFID chips. The first release is the SA7110 read only device which operates at 125 kHz and offers features such as EEPROM flexibility of data and mode; on-chip high voltage regulation; on-chip RF frequency extractor/ prescaler; and customer-specific configuration of stored data.

The device is manufactured on SAMES' 1,2 µm N-well EEPROM process and has 64 bits of factory pre-programmed and locked bits in EEPROM memory. Its mode of operation is factory configured. The device mode of operation can be either Manchester coded or phase shift keyed (PSK) coded. The device has an on chip rectification circuit that converts the incoming RF signal to DC power feeding Vdd. There is also an on-chip modulator which works in conjunction with the rectifier. The time base is extracted by an on-chip RF clock extractor. High voltage protection is provided internally to protect against high voltages from the coil. These features result in a device requiring very low external component count, in effect the device can operate with only a coil connected externally.

Data is read at the RF interface by means of the on-chip modulator. The stored bits are clocked out sequentially during the read operation and an internal power-on-reset is provided which allows the device to start reading out data at low voltages for improved tag range.

SAMES is offering the devices in a number of ways: the devices can be bought as good die tested on sawn wafers or alternatively, as chip with coil. For customers with significant volumes, header codes can be allocated as customer specific with smaller volume customers taking sequential numbered devices from a generic header code. Two customer specific header codes have already been secured. SAMES says that it will release the SA7210 read/write devices shortly. These will contain authentication feature for writing secure data to chip. This device will also be sold as good die on sawn wafer or as chip with coil.

SAMES is a division of Labat Technologies. For further details contact Duncan Charity, (012) 333 6021, [email protected], [email protected]





Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

TDK announces robust varistors with 14 mm disk diameter
Electrocomp Passive Components
The new AdvanceD series of varistors have a wide operating voltage range up to 625 V and offer a surge current capability of 3000 A.

Read more...
Angle sensor for safety-critical applications
Altron Arrow Passive Components
TDK’s TAS4240 TMR-based angle-sensor enables precise angle measurements in applications where high performance is needed and space is limited.

Read more...
New high current through-hole inductors
EBV Electrolink Passive Components
Vishay has released a high current, through-hole inductor for use in high current and high temperature applications, DC/DC converters, high current differential chokes and inverters.

Read more...
High performance power inductor in a tiny package
RF Design Passive Components
The LPS4010 series inductors from Coilcraft are low-profile power inductors in a shielded package that offer high energy storage and low DC resistance.

Read more...
Surface-mount resettable fuses
Electrocomp Passive Components
The new series of fuses, suitable for overcurrent and thermal protection, expand the hold current up to 6 A and the maximum voltage to 33 V DC.

Read more...
New compact SMT chokes for low-voltage applications
Future Electronics Passive Components
TDK has released three new B8272 series of compact EPCOS SMT common-mode chokes specially developed for DC/DC converters and low-voltage applications.

Read more...
Electrocomp stocks PhaseCap Energy Plus capacitor
Electrocomp Passive Components
TDK Electronics’ new PhaseCap Energy Plus series capacitor is the latest generation of capacitor for power factor correction.

Read more...
Multilayer ferrite beads
Electrocomp Passive Components
As direct replacements for the discontinued BMB series, TE Connectivity’s BMC multilayer ferrite beads cover a wide range of impedance characteristics.

Read more...
High-voltage power inductors
RF Design Passive Components
Coilcraft’s RFC0807BV Series power inductors are a high-voltage version of the RFC0807B Series. Their operating voltage is rated at 800 V, which is higher than comparable products in the market. They ...

Read more...
Power inductors with very low DC and AC losses
RF Design Passive Components
Coilcraft’s new XGL6020 low-profile moulded power inductors offer the company’s lowest DC losses and extremely low AC losses for a wide range of DC-DC converters.  Additional performance benefits include ...

Read more...