900MHz LNA/MIXER PROVIDES BEST LINEARITY PERFORMANCE FOR 8mA
Note to Editors: This 900MHz LNA/mixer provides the best linearity and front-end performance for 8mA. The input IP3 is 1dB to 9dB higher than both GaAs and silicon competitors, resulting in a 6dB (or 4x) improvement in receiver dynamic range.
SUNNYVALE, CA-July 28, 1999-Maxim Integrated Products introduces the MAX2685, an LNA/mixer IC optimized to provide the best linearity (or input IP3) performance at 900MHz. The MAX2685's high input IP3 improves a receiver's ability to detect a wanted signal under high-interference signal conditions; this is especially important in today's crowded 900MHz spectrum. The device features a combined front-end performance of 21.1dB gain, 2.97dB noise figure, and -9.5dBm input IP3. A logic-controlled LNA bypass switch reduces the LNA gain by 27dB, increasing the input IP3 by almost 20dB, to +10dBm. Robust front-end performance makes the MAX2685 ideal for applications such as digital cordless phones; private mobile radios; 868MHz/900MHz ISM band radios; and AMPS, TDMA, and GSM cellular phones.
The MAX2685 also features an on-chip LO buffer, allowing the LO port to be driven with a low -8dBm LO signal. A low supply current of 8.5mA (high-gain mode) and 3.8mA (low-gain mode), plus a low operating supply range of +2.7V to +5.5V make the device suitable for use in 3-cell NiCd or 1-cell lithium-ion battery applications. A low-power shutdown mode further extends battery life by reducing supply current below 0.1µA.
The MAX2685 is available in a space-saving 16-pin QSOP package. Prices start from $1.37 (1000-up, FOB USA). A fully assembled evaluation kit (MAX2685EVKIT) is available to help reduce design time.
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