SILICON LABS SI4438-C2A-GMR

Excellent selectivity performance  58 dB adjacent channel  75 dB blocking at 1 MHz Antenna diversity and T/R switch control Highly configurable packet handler  TX and RX 64 byte FIFOs  Auto frequency control (AFC)  Automatic gain control (AGC)  Low BOM  Low battery detector  Temperature sensor 20-Pin QFN package  IEEE 802.15.4g ready Suitable for China regulatory (State Grid)

A high-performance, low-current transceiver covering the sub-GHz frequency bands from 425 to 525 MHz. Targeted at the Chinese smart meter market and especially suited for electric meters. Footprint- and pin-compatible with the Si446x radios. Part of the EZRadioPRO family. Offers outstanding sensitivity of –124 dBm with extremely low active and standby current consumption. 58 dB adjacent channel selectivity with 12.5 kHz channel spacing ensures robust receive operation in harsh RF conditions. Exceptional output power of up to +20 dBm with outstanding TX efficiency. High output power and sensitivity result in an industry-leading link budget of 144 dB allowing extended ranges and highly robust communication links.

• Frequency range = 425–525 MHz
• Receive sensitivity = –124 dBm
• Modulation: (G)FSK, OOK
• Max output power: +20 dBm
• Low active power consumption: 14 mA RX
• Ultra low current powerdown modes: 30 nA shutdown, 40 nA standby
• Data rate = 100 bps to 500 kbps
• Preamble Sense Mode: 6 mA average Rx current at 1.2 kbps
• Fast wake and hop times
• Power supply = 1.8 to 3.8 V

• China smart meters