MAX7030

19-3706; Rev 0; 5/05 Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL General Description www.datasheet4u.com Features ♦ +2.1V to +3.6V or +4.5V to +5.5V Single-Supply Operation ♦ Single-Crystal Transceiver ♦ Factory-Preset Frequency (No Serial Interface Required) ♦ ASK/OOK Modulation ♦ +10dBm Output Power into 50Ω Load ♦ Integrated TX/RX Switch ♦ Integrated Transmit and Receive PLL, VCO, and Loop Filter ♦ > 45dB Image Rejection ♦ Typical RF Sensitivity*: -114dBm ♦ Selectable IF Bandwidth with External Filter ♦ < 12.5mA Transmit-Mode Current ♦ < 6.7mA Receive-Mode Current ♦ < 800nA Shutdown Current ♦ Fast-On Startup Feature, <250µs ♦ Small, 32-Pin, Thin QFN Package *0.2% BER, 4kbps Manchester-encoded data, 280kHz IF BW MAX7030 The MAX7030 crystal-based, fractional-N transceiver is designed to transmit and receive ASK/OOK data at factory-preset carrier frequencies of 315MHz, 345MHz†, or 433.92MHz with data rates up to 33kbps (Manchester encoded) or 66kbps (NRZ encoded). This device generates a typical output power of +10dBm into a 50 Ω load, and exhibits typical sensitivity of -114dBm. The MAX7030 features separate transmit and receive pins (PAOUT and LNAIN) and provides an internal RF switch that can be used to connect the transmit and receive pins to a common antenna. The MAX7030 transmit frequency is generated by a 16bit, fractional-N, phase-locked loop (PLL), while the receiver’s local oscillator (LO) is generated by an integer-N PLL. This ...