AS3909/AS3910 13.56 MHz RFID Reader IC, ISO-14443 A/B The AS3909/10 is a high performance 13.56MHz HF RFID Reader General Description IC. The AS3909/10 is unequalled in the domain of HF Reader ICs it contains two differential low impedance (1.5) antenna drivers. These drivers are unmatched, which means that the IC can deliver up to 8 times the output power of a standard HF Reader IC using the same power supply voltage. Additionally using this configuration means half of the power consumption at the same output power. The IC has an operating voltage down to 2.4V and a low power operating mode of 5mA. This means the AS3909/10 is ideal for portable or battery powered applications. For applications where high power is required the AS3909/10 can attain up to 700mW. This means there is no need for complex external booster circuitry. The component count and complexity of the design is further reduced through the patented automatic modulation depth adjustment. The analog front end (AFE) is complemented by a highly integrated data framing engine for both ISO-14443 A and B. This includes data rates up to 848kbits with all framing and synchronization tasks on board. This enables the customer to build a complete HF RFID Reader using only a low end micro. The AS3909/10 not only supports reader to tag communication, but sports Peer to Peer communication using the NFCIP-1 active communication mode with a data rate of 106kbps. The IC has a SPI, which enables bi-directional communication with the external microcontroller. Other standard and custom protocols, such as ISO -15693 or Felica can be implemented via transparent mode. Only available in AS3910: In addition to the above mentioned advantages, AS3910 also features the ams unique Automatic 1 Antenna Tuning (AAT) technology. With AAT, the device is optimized for application with directly driven antenna and enables the reader to retune itself to deliver maximum output at 13.56MHz, when the surroundings detunes the antenna. For further understanding in regards to the contents of the datasheet, please refer to the Reference Guide located at the end of the document. 1. Only available in AS3910. ams Datasheet, Confidential: 2013-Oct 3-02 AS3909/AS3910 1Figure 1: Standard Products Part Number AAT Trim Pins AS3909 No NC Connect to external trim caps as mentioned in Calibrate Antenna AS3910 Yes Resonance Key Benefits & Features The benefits and features of this device are listed below: Figure 2: Added Value of Using AS3909/10 Benefits Features Close loop adjustment of ASK modulation for accurate control Stable Modulation Index of modulation depth in case of ISO-14443B protocol Enabling Ultra Low Power Applications Low power (3.5A) NFC target mode No communication holes AM/PM demodulator Measuring signal strength on RFI pins Accurate RF envelope measurement (8 bit A/D) High output power at 3.3V power supply: Up to 700mW in case regulator is externally shorted Up to 500mW in case differential output and antenna Enables various antenna configurations trimming is used Up to 125mW in case of single ended output and antenna trimming is used Squelch feature which performs gain reduction to compensate Increases EMD immunity for noise generated by transponder processing (1) Enable tuning of the Antenna LC Tank Automatic Antenna tuning (AAT) For support of other standards and custom Transparent mode protocols (ISO-15693, FeliCa, ...) Enabling Inductive wakeup in combination Amplitude and phase measurement with MCU Supporting 13.56 MHz and 27.12MHz Quartz oscillator with fast start-up Supply voltage range from 2.4V to 3.6V Wide temperature range: -40C to 85C 32-pin QFN (5x5mm) for AS3910 and 32-pin TQFN (5x5mm) for AS3909 Note(s) and/or Footnote(s): 1. Only available in AS3910. AS3909/AS3910 2 ams Datasheet, Confidential: 2013-Oct 3-02