China, on January 18, 2019 – the STHVDAC-253C7 number capacitance control of meaning law semiconductor implement use at control adjustable capacitance, for example, the STPTIC series of meaning law semiconductor is adjustable capacitance, the advantage of this product is OK the dimension of circuit of contractible antenna tuning, drop stock detailed account (BoM) cost and power comsumption, stabilize the radio frequency function of the smartphone. Use STHVDAC-253C7 controller and STPTIC electric capacity at impedance to match with frequency tuning, the influence of change of environment of ministry of except of almost OK and complete disappear to radio frequency function, make mobile phone user OK obtain stronger receive signal, the fewer frequency that drop a word, rapidder data rate, with time of longer batteries add boat.
Use the 0.18µm BCD8 technology with meaning law advanced semiconductor and 0.35mm span to pour load to enclose, the dimension of STHVDAC-253C7 than going up generation product narrows 50% , working electric current reduces an in part. In addition, new controller can cooperate to use with inductor of newest 0402 chip dimension, need not exterior Xiaoteji diode, reduced circuit further thereby total acreage.
As it is only adjustable the high-pressured digital-to-analogue converter that capacitance offers bias voltage (DAC) , STHVDAC-253C7 controller offers 3 output for the user, 3 kinds of in be being used at controlling mobile phone of GSM/WCDMA/LTE much frequency different capacitance. Meaning law semiconductor is compositive still step up converter, offer tone face-lifting to be worth needs 0V-24V bias voltage. STHVDAC-253C7 support system is sent and receive implement the front of radio frequency of standard MIPI RFFE(that give out) command, support identification code of 3 RFFE Unique Slave ID (USID) , a STHVDAC-253C7 can manage 3 independent antenna.
STHVDAC-253C7 supports commonly used aerial tuning pattern, the regular pattern; that includes time of switch of voltage of new old output to be less than 10µs shortens 512µs of delay time of switch of new old voltage goes to the Turbo mode; that exports capacitance voltage set-up time the Glide pattern that 16.84ms can set. Glide mode can realize the smoothest voltage transition, contented 3GPP is phasic the requirement such as discontinuous sex. In addition, this capacitance control implement still offer a GPIO to cite a base, use at two controller that connect on same RFFE bus line managing in double tuner mobile phone, still use at switch controller register, in order to manage design of aerial component part, or when should inserting USB data line, use at adjusting register setting, answer speed in order to amend aerial.
STHVDAC-253C7 already was entered now produce level beforehand, use WLCSP of span of 0.35mm of 12 solder ball to pour load to enclose, design development can be asked for to use print since this day.