ADRF6658BCPZ

上下转换器 Wdebnd Dual RX Mixer w/ Integrated I

Product Details

The ADRF6658 is a high performance, low power, wideband, dual-channel radio frequency RF downconverter with integrated intermediate frequency IF digitally controlled amplifiers DGAs for wideband, low distortion base station radio receivers.

The dual Rx mixers are doubly balanced Gilbert cell mixers with high linearity and excellent image rejection. Both mixers convert 50 Ω RF inputs to open-collector broadband IF outputs. Internal tunable baluns on the RF inputs enable suppression of RF signal harmonics and attenuation of out-of-band signals before the mixer inputs, reducing input reflections and out-of-band interference signals. A flexible local oscillator LO architecture allows the use of differential or single-ended LO signals.

The dual-channel IF DGAs are based on the ADL5201 and ADL5202 and have a fixed, differential output impedance of 100 Ω. The gain is adjustable over a 31.5 dB range with a 0.5 dB step size via the on-chip SPI, or through independent, 6-bit parallel ports that support latch functionality. Each channel, from the mixer inputs to the IF amplifier outputs, together with an LC interstage band-pass filter, achieves a maximum voltage conversion gain of 26.5 dB.

Fabricated with the Analog Devices, Inc., high speed SiGe process, the ADRF6658 is available in a compact, 7 mm × 7 mm, 48-lead LFCSP package, and operates over the −40°C to +105°C temperature range.

Applications

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Cellular base stations and wireless infrastructure receivers W-CDMA, TD-SCDMA, WiMAX, GSM, LTE, PCS, DCS, DECT

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Active antenna systems

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PTP radio link down converters

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Wireless LANs and CATV equipment

### Features and Benefits

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Wideband, dual-channel, active downconversion mixers

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Low distortion, fast settling, IF DGAs

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RF input frequency range:

690 MHz to 3.8 GHz

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Programmable baluns on RF inputs

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Differential and single-ended LO input modes

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Differential IF output impedance: 100 Ω

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Programmable via a 3-wire serial port interface SPI

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For RF = 1950 MHz, IF = 281 MHz, high linearity mode:

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Voltage conversion gain, including IF filter loss: −5 dB to +26.5 dB

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See data sheet for more detailed information

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Flexible power-down modes for low power operation

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Power-up time after enabling channels: 100 ns, typical

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Single 3.3 V supply

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High linearity mode: 440 mA

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Low power mode: 260 mA