The MAX2685's low-noise amplifier (LNA) and downconverter mixer comprise the major blocks of an RF front-end receiver. Optimized for 900MHz operation, the device's low noise figure, high gain, and high linearity make it ideal for cellular, cordless, and wireless data applications. A low supply current of 8.5mA (high-gain mode) and 3.8mA (low-gain mode) plus a low operating supply voltage range of +2.7V to +5.5V make it suitable for use in 3-cell NiCd or 1-cell lithium-ion (Li+) battery applications. A low-power shutdown mode further extends battery life by reducing supply current below 0.1µA. The MAX2685 includes an LNA, LNA bypass switch, downconverter mixer, and local-oscillator (LO) buffer. The LNA has a low noise figure of 1.4dB, a high gain of 15dB, and an input third-order intercept point (IP3) of -4dBm. The mixer has a noise figure of 13dB, a gain of 6dB, and an input IP3 of +7dBm. In addition, an LNA bypass switch allows two levels of gain, reducing power consumption when high gain is not needed. The downconverter mixer has a single-ended RF input port and differential IF output ports. Differential operation of the IF ports offers improved even-order harmonic rejection and increased immunity to noise. An LO buffer allows the LO port to be driven with only -8dBm of LO power. The MAX2685 is offered in a space-saving 16-pin QSOP package. Applications * 868MHz European ISM Band * 900MHz ISM-Band Applications * Cell Phones/Cordless Phones * Wireless Data * 800MHz to 1000MHz RF Frequency Range * +2.7V to +5.5V Single-Supply Operation * Integrated LNA + Mixer + LO Buffer * Logic-Controlled LNA Bypass Switch Reduces Supply Current * LNA Performance (High/Low Gain) * Gain: +15dB/-12dB * NF: 1.4dB/12dB * Input IP3: -4dBm/+16dBm * Mixer Performance (High/Low Gain) * Gain: 6dB/4.6dB * NF: 13dB/12dB * Input IP3: +7dBm/-1.5dBm * Supply Current * 8.5mA (High Gain) * 3.8mA (Low Gain) * <0.1µA Supply Current in Shutdown Mode * 0.8µs Receiver Enable Time https://elecena.pl/product/22322382/low-cost-900mhz-low-noise-amplifier-and-downconverter-mixer 2022-12-27 https://elecena.pl/product/22322382/low-cost-900mhz-low-noise-amplifier-and-downconverter-mixer 2024-10-07 https://elecena.pl/product/22322382/low-cost-900mhz-low-noise-amplifier-and-downconverter-mixer 2024-11-08 https://elecena.pl/product/22322382/low-cost-900mhz-low-noise-amplifier-and-downconverter-mixer 2025-01-18