Si4438

Si4438 HIGH-PERFORMANCE, LOW-CURRENT TRANSCEIVER Features  Frequency  Excellent selectivity performance range = 425–525 MHz 58 dB adjacent channel  Receive sensitivity = –124 dBm 75 dB blocking at 1 MHz  Modulation (G)FSK  Antenna diversity and T/R switch control OOK  Highly configurable packet handler  Max output power  TX and RX 64 byte FIFOs +20 dBm  Auto frequency control (AFC)  Low active power consumption  Automatic gain control (AGC) 14 mA RX  Low BOM  Ultra low current powerdown modes  Low battery detector  Temperature sensor    30 nA shutdown, 50 nA standby Data rate = 100 bps to 500 kbps Fast wake and hop times  Power supply = 1.8 to 3.6 V  20-Pin QFN package IEEE 802.15.4g ready China regulatory r Applications fo  China smart meters d Description e Silicon Laboratories' Si4438 is a high-performance, low-current transceivers covering the sub-GHz frequency bands from 425 to d 525 MHz. The Si4438 is targeted at the Chinese smart meter market and n is especially suited for electric meters. This device is footprint- and pin-compatible with the Si446x radios, which provide industry-leading e performance for worldwide sub-GHz applications. The radios are part of the EZRadioPRO® family, which includes a complete line of transmitters, m receivers, and transceivers covering a wide range of applications. All parts offer outstanding sensitivity of –124 dBm while achieving extremely m low active and standby curre...