REP037: The MAX2383 WCDMA Tx Upconverter Driver Linearity Measurements
Abstract: The MAX2383 upconverter and power amplifier (PA) driver is designed for WCDMA applications. A series of linearity measurements were taken at various IF pin and VGE levels, with IF at 380MHz and RF at 1950MHz. A table of measured results for output power, gain, ACPR1, ACPR2 and ICC is provided.
Rapid engineering prototypes are real circuits that Maxim application engineers have built and measured in our labs. They can provide a starting point for new RF designs. They are not available as evaluation kits.
The MAX2383 upconverter and PA driver is designed for WCDMA applications. A series of linearity measurements were taken at various IF pin and VGE levels, with IF at 380MHz and RF at 1950MHz.
The MAX2383 is targeted for the 2270MHz to 2580MHz LO frequency range. It is fabricated using an advanced high-frequency bipolar process and includes an upconversion mixer with variable gain control, an LO buffer and a variable-gain PA driver for output power control. The mixer and PA driver linearity have been optimized to provide excellent RF performance in the 1920MHz to 1980MHz band, while drawing minimal current. The mixer's performance is optimized for a -10dBm ±3dB LO drive at the LO buffer input port.
The MAX2383 achieves excellent noise and image suppression without the use of an interstage Tx SAW bandpass filter, saving valuable board space, cost, and supply current. It is specified for +2.7V to +3.0V single supply, and is available in an ultra-miniature 3 x 4 UCSP package for optimum cost- and space-reduction and for best RF performance.
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