New interface chip from ams drives down the cost of adding high data-rate NFC capability to microcontroller designs
AS3953 NFiC® offers full bi-directional near field communication, while harvesting energy from RF emissions
The AS3953 offers a high data-rate interface between a NFC device such as a smartphone and any host microcontroller with a standard Serial Peripheral Interface (SPI).
Operating on energy harvested from an NFC reader's RF emissions, the AS3953 NFiC® (Near Field Communications interface Chip) requires no external power source and at most one external component (a capacitor). The device enables system designers to add full bi-directional NFC capability at a total cost less than half that of a typical NFC reader implementation, which can require as many as 20 external components.
The AS3953 is fully compliant with NFC Forum specifications (NFCIP-1 target at 106kbps) and the ISO14443A industry standard (up to 848kbps, to Level 4). This means that it can be used in contactless smart cards and as an NFC Forum-compatible interface tag, and can establish instant communication with any NFC-enabled phone in close proximity (<10cm).
The AS3953 is expected to find uses in a wide variety of applications, including contactless passive programming of MCU-based systems, smart cards with displays, smart retail shelf labels, sensors and ultra low-power data loggers, medical devices, and secured NFC Bluetooth pairing.
It can also enable innovative new approaches to system designs by using an NFC-enabled smartphone as a display host and system controller for normally stand-alone devices, eliminating the requirement for the slave device to have its own display and processor.
The AS3953 features a configurable wake-up interrupt, enabling a zero-power system design while in shut down. It also contains a complete analog front end, 1kB of internal EEPROM, and a 4-wire SPI with a 32-byte FIFO. The device can draw up to 5mA of harvested energy from the external magnetic field, and includes an internal power management circuit that can supply harvested energy to the application.
This makes the AS3953 ideal for use with battery-powered and portable microcontroller-based devices.
Rene Wutte, Marketing Manager at ams, maintains "The AS3953 creates a whole new category of NFC applications. It allows NFC functionality to be added to any application for a fraction of the cost of a full NFC reader, without complicating the design. This is now, for instance, the easiest and most affordable way to enable an application to communicate with a mobile phone."
ams has also announced a new reference design developed in close cooperation with Epson. The design is for a complete passive solution for price labels and smart cards. It combines an Epson S1C17F57 microcontroller, which features a built-in driver for e-paper displays (64 channels), and the AS3953 NFiC® from ams. According to Manfred Wittmeir, IC Department Manager at Epson Europe Electronics GmbH, "Epson has a long track record of providing energy efficient semiconductors for various battery-driven products. The AS3953 enables us for the first time to build a complete passive solution without the need for an auxiliary power supply such as a battery, while implementing a standard NFC interface for exchanging data with our microcontroller. A simple design, it can be implemented quickly by engineers with no deep knowledge of the operation of NFC technology."
Both the AS3953 and the passive e-paper demonstration design will be shown at the ams booth at Cartes 2012 in Paris (3D.105, November 6-8, Paris). They will also be on show at Electronica (Hall A4, stand 211, November 13-16, Munich).
Price & Availability
The AS3953 NFiC is available as a bare die or in a 10-pin, 3mm x 3mm MLPD package. The device is available for sampling now. It is priced at $1.59 for 1,000 pieces as a package, and $1.15 as a bare die.
A demonstration board for the AS3953 NFiC is available. For further information on the AS3953 or to request samples, please visit www.ams.com/RFID/AS3953.
about Epson Europe Electronics
Epson Europe Electronics GmbH is a marketing, engineering and sales company and the European Headquarters for electronic devices of the Seiko Epson Corporation, Japan.
Since 1989 headquartered in Munich/Germany with 60 employees, Epson Europe Electronics GmbH has several European sales representatives and has a European-wide network of distributors. Epson Europe Electronics provides value added services for Semiconductors and Quartz Devices targeted to the mobile communication, automotive and home visual market. Epson products are recognized for energy saving, low power, small form factors and rapid time to market.
Information about Epson Europe Electronics GmbH is available in the Internet under www.epson-electronics.de
ams develops and manufactures high-performance analog semiconductors that solve its customers' most challenging problems with innovative solutions. ams' products are aimed at applications which require extreme precision, accuracy, dynamic range, sensitivity, and ultra-low power consumption. ams' product range includes sensors, sensor interfaces, power management ICs and wireless ICs for customers in the consumer, industrial, medical, mobile communications and automotive markets.
With headquarters in Austria, ams employs over 1,200 people globally and serves more than 6,500 customers worldwide. ams is the new name of austriamicrosystems, following the 2011 acquisition of optical sensor company TAOS Inc. ams is listed on the SIX Swiss stock exchange (ticker symbol: AMS). More information about ams can be found at www.ams.com.
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