400 MH TO 6 GH Broadband Quadrature Modulator

The ADL5375 is a broadband quadrature modulator designed for operation from 400 MHz to 6 GHz. Its excellent phase accuracy and amplitude balance enable high performance intermediate frequency or direct radio frequency modulation for communication systems.

The ADL5375 features a broad baseband bandwidth, along with an output gain flatness that varies no more than 1 dB from 450 MHz to 3.8 GHz. These features, coupled with a broadband output return loss of <−14 dB, make the ADL5375 ideally suited for broadband zero IF or low IF-to-RF applications, broadband digital predistortion transmitters, and multiband radio designs.

The ADL5375 accepts two differential baseband inputs and a single-ended LO. It generates a single-ended 50 Ω output. The two versions offer input baseband bias levels of 500 mV (ADL5375-05) and 1500 mV (ADL5375-15).

The ADL5375 is fabricated using an advanced silicon-germanium bipolar process. It is available in a 24-lead, exposed paddle, Pb-free, LFCSPVQ package. Performance is specified over a −40°C to +85°C temperature range. A Pb-free evaluation board is also available.

Applications

* Cellular communication systems

GSM/EDGE, CDMA2000, W-CDMA, TD-SCDMA

* WiMAX/broadband wireless access systems

* Satellite modems

* Output frequency range: 400 MHz to 6 GHz

* 1 dB output compression: ≥9.4 dBm from 450 MHz to 4 GHz

* Output return loss ≤12 dB from 450 MHz to 4.5 GHz

* Noise floor: −160 dBm/Hz @ 900 MHz

* Sideband suppression: ≤−50 dBc @ 900 MHz

* Carrier feedthrough: ≤−40 dBm @ 900 MHz

* IQ3dB bandwidth: ≥ 750 MHz

* Baseband input bias level

ADL5375-05: 500 mV

ADL5375-15: 1500 mV

* Single supply: 4.75 V to 5.25 V

* 24-lead LFCSPVQ package