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STHVDAC-253M Datasheet(PDF) 1 Page - STMicroelectronics |
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STHVDAC-253M Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 27 page  This is information on a product in full production. February 2014 DocID025735 Rev 1 1/27 STHVDAC-253M Antenna tuning circuit Datasheet − production data Features • Dedicated ASIC to control BST tunable capacitances • Operation compliant with cellular systems requirements • Integrated boost converter with 3 programmable outputs (from 0 to 25 V) • Low power consumption • MIPI RFFE serial interface 1.8 V • Available in WLCSP for stand-alone or SiP module integration • RF tunable passive implementation in mobile phones to optimize the radiated performances Application • Cellular antenna tunable matching network in multi-band GSM/WCDMA mobile phone • Compatible with open loop antenna tuner applications Description The ST BST capacitance controller STHVDAC-253M is a high voltage digital to analog converter (DAC), specifically designed to control and meet the wide tuning bias voltage requirement of the BST tunable capacitances. It provides 3 independent high voltage outputs, thus having the capability to control 3 different capacitances. It is fully controlled through a RFFE serial interface. BST capacitances are tunable capacitances intended for use in mobile phone application, and dedicated to RF tunable applications. These tunable capacitances are controlled through a bias voltage ranging from 0 to 25 V. The implementation of BST tunable capacitance in mobile phones enables significant improvement in terms of radiated performances, making the performance almost insensitive to the external environment. Figure 1. Pin configuration bumps side view Lead-free, Flip Chip (16 bumps) GND_BOOST IND_BOOST GND_DIG VHV VIO DATA SELSID GND AVDD OUTB GND OUTA CLK GND_REF RBIAS OUTC 2 3 1 4 C A D B www.st.com |
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