Antenna-tuning circuit adheres to new RF front-end standard

Antenna-tuning circuit adheres to new RF front-end standard

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STMicroelectronics has introduced an antenna-tuning circuit featuring a 4-channel output for adjusting up to four tunable BST capacitors in the antenna-matching circuits of multi-band GSM/WCDMA/3G-LTE smartphones.
By eeNews Europe

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A key feature is support for the MIPI Alliance RF Front End (RFFE), an emerging industry standard that simplifies cellular radio design.

The STHVDAC-304MF3 is controlled via an RFFE-compliant 1.8 V interface, and comprises a High-Voltage Digital-Analog Converter (HVDAC) for generating capacitor-tuning voltages from 2 V to 20 V. Features include a trigger mode for time critical application, and a shutdown mode allowing longer battery life. The new device joins ST’s 3-channel STHVDAC-303, which has a standard SPI host connection.

Availability and Pricing

The device is in production in a 0.4 mm-pitch, 0.6 mm-high, chip-scale package. Pricing is from $0.50 for orders over 1,000 units. Samples are available immediately.

More information about ST’s STHVDAC-304MF3 antenna-tuning circuit at www.st.com/web/en/catalog/sense_power/FM139/CL2084/SC1883/PF253347

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