ST25R3909数据手册RF/IF射频/中频RFID的RFID射频接入监控IC规格书PDF

描述 Description

The ST25R3909 is a high performance 13.56 MHz RFID reader, with two differential, low impedance (1.5 Ohm) antenna drivers.
These drivers are unmatched, allowing the ST25R3909 to deliver up to eight times the output power of a standard HF reader IC using the same power supply voltage, and reducing in half the power consumption at the same output power.
The ST25R3909 can operate already at 2.4 V, with a low power operating mode of 5 mA, making it perfectly suited for portable or battery-powered applications.
For applications where high power is required the ST25R3909 can deliver up to 700 mW, thus avoiding the need for complex external booster circuitry.
The component count and complexity of the design is further reduced through 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 848 kbit/s, with all framing and synchronization tasks on board, and enables to build a complete HF RFID reader using only a low end microcontroller.
The ST25R3909 supports reader to tag and Peer to Peer communication using the NFCIP-1 active communication mode with a 106 kbps data rate. Other standard and custom protocols, such as ISO-15693 or FeliCa™ can be implemented via transparent mode. The ST25R3909 features a SPI, which enables bi-directional communication with the external microcontroller.

特性 Features

Close loop adjustment of ASK modulation for accurate control of modulation depth in case of ISO-14443 B protocol
Low power (3.5 μA) NFC target mode
AM/PM demodulator
Accurate RF envelope measurement (8-bit A/D converter)
High output power at 3.3 V power supply:Up to 700 mW in case regulator is externally shorted
Up to 500 mW in case of differential output when antenna trimming is used
Up to 125 mW in case of single ended output when antenna trimming is used

Squelch for gain reduction, to compensate for noise generated by transponder processing
Transparent mode
Amplitude and phase measurement
Supporting 13.56 MHz and 27.12 MHz quartz oscillators with fast start-up
Supply voltage range from 2.4 to 3.6 V
Wide temperature range: -40 ºC to 85 ºC
Package: 32-pin QFN32, 5 mm x 5 mm

简介

ST25R3909属于RF/IF射频/中频RFID的RFID射频接入监控IC。由制造生产的ST25R3909RFID，射频接入，监控 ICRFID 或射频接入监控 IC 是配置为射频识别 (RFID) 读取器、应答器、无源接入/无源启动处理器和轮胎压力监测系统 (TPMS) 的半导体器件。这些器件的设计符合 EPC、ISO、NFC、MiFARE 和 FeliCa 等特定 RFID 标准，并通过 I2C、SPI、UART、USB、PWM、RS232、RS422、RS485 及其他接口进行通信。