(Hong Kong)
Product Summary
The PM6650-1M is a direct conversion chipset that integrates all the upconversion and modulation functionality necessary for CDMA-mode phones operating in cellular and PCS bands. The PM6650-1M consists of two sets of I/Q modulators, one for cellular and one for the PCS band. The baseband I/Q input from the MSM directly modulates the cellular or PCS carrier derived from the respective LO generation circuit. Both the cellular and PCS output drive their own VGA with a gain control range of 85 dB. A final cellular driver amplifier provides a modulated RF output.
Features
PM6650-1M features: (1)Reduction in component count, space and cost via radioOne chipset that eliminates receiver and transmitter IF; (2)Single- or dual-band operation: cellular and PCS; (3)Single- or multimode operation: Cellular CDMA; PCS CDMA; (4)Full direct upconversion from analog baseband to RF; (5)Transmit signal path: Baseband amplifier; Two sets of quadrature modulators/upconverters; RF AGC amplifier, switch network, driver amplifier; (6)Integration of LO generation circuit; (7)Requirement of only one external VCO for all CDMA bands of operation; (8)Entire transmit synthesizer on chip (transmitter PLL and VCO); (9)Receiver PLL on chip; (10)Greater than 85 dB transmit power control range; (11)Power-reduction feature via MSM control extends handset talk time, Optimized for low DC power consumption versus RF output level; Transmit puncturing; Selective circuit power-down; (12)Efficient three-line QCT SBI; (13)Power supply voltage (2.7 to 3.0 V); (14)Small thermally efficient package (40-pin BCC++).
Diagrams
