STMicroelectronics STPTIC-47F1M6

Overview

STPTIC-47F1M6 from STMicroelectronics is a Parascan™ tunable integrated capacitor using barium strontium titanate (BST) dielectric, designed for RF antenna matching networks in mobile handsets. It delivers 4.7 pF nominal capacitance at 2 V bias, 3.5:1 tuning range (C_2V/C_20V), Q ≥ 65 at 900 MHz, +36 dBm peak RF power handling, and operates from DC to 3 GHz in µQFN-6L package.

For engineers reviewing the STPTIC-47F1M6 datasheet, STPTIC-47F1M6 pinout, STPTIC-47F1M6 application, or STPTIC-47F1M6 equivalent, key selection criteria include analog voltage-controlled tuning (2–20 V), low leakage current (<100 nA), sub-135 µs transition time, and compatibility with STHVDAC high-voltage control ICs in LTE/WCDMA multi-band front-end designs.

Technical Context

The STPTIC-47F1M6 implements a shunt/series configurable BST-based varactor structure, enabling open-loop adaptive impedance matching without closed-loop feedback. Its DC-biased RF ports (RF1, RF2) support bidirectional signal flow while maintaining isolation between bias and RF paths via internal DC blocking.

It operates across 700–3000 MHz under −30 °C to +85 °C ambient, with third-order intercept point (IP3) ranging from 60 dBm (2 V bias) to 70 dBm (20 V bias), and harmonic suppression of −65 dBm (H2) and −45 dBm (H3) at 34 dBm input power.

Key Specifications

Pinout & Package

STPTIC-47F1M6 is housed in a lead-free, ECOPACK®2-compliant µQFN-6L plastic molded package measuring 1.2 × 1.6 × 0.9 mm, with wettable flank terminations for automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF tunable capacitor applications.

Compared with QM11025 and AVX TCS0603M470JRT, STPTIC-47F1M6 uniquely combines wideband Q stability (65 @ 900 MHz, 45 @ 1800 MHz), integrated DC blocking, and 3.5:1 tuning - making it the only viable choice for adaptive multi-band smartphone antenna systems requiring field robustness.

Availability

STPTIC-47F1M6 is available at Aetrix Electronics and suitable for cellular antenna matching, LTE front-end filtering, GSM/WCDMA diversity receive, and 5G NR sub-6 GHz beamforming applications requiring stable component supply across high-volume mobile production cycles.

Supply support for STPTIC-47F1M6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and RF components for automotive, industrial, and consumer markets.

The STPTIC series belongs to ST's RF Tunable Passive portfolio, engineered specifically to replace fixed capacitors and mechanical switches in adaptive antenna systems - targeting radiated performance optimization in space-constrained mobile devices.

FAQ

What is the maximum allowable DC bias voltage for continuous operation?

The absolute maximum DC bias voltage is 25 V, but the recommended operating range is 2–20 V. Operating above 20 V risks accelerated dielectric aging and reduced long-term capacitance stability, especially at elevated temperatures (>65 °C). ST specifies 20 V as the upper limit for guaranteed 1000-cycle lifetime under +85 °C ambient conditions.

Can STPTIC-47F1M6 be used in series configuration with RF1 and RF2 connected to different nodes?

Yes - the device supports both shunt and series configurations. In series mode, RF1 and RF2 are placed in-line with the RF signal path, while DC BIAS (A1) remains isolated via internal blocking. Layout must maintain 50 Ω characteristic impedance on both RF traces and avoid stubs longer than λ/20 at 3 GHz (≤5 mm) to preserve IP3 performance.

Is the µQFN-6L package compatible with standard lead-free reflow profiles?

Yes - ST specifies a peak reflow temperature of 240–245 °C for 60 seconds above 220 °C, with ramp rates ≤3 °C/s. The µQFN-6L's wettable flanks enable reliable solder joint inspection. Avoid convection airflow >1 m/s during reflow to prevent component shift, as noted in DocID023772 Rev 4 Section 4.

How does leakage current affect bias network design?

With max 100 nA leakage at 20 V, the bias network must source <1 µA total to maintain voltage accuracy within ±10 mV. A 100 kΩ series resistor introduces only 10 mV drop, but RC filtering (e.g., 100 kΩ + 100 nF) yields 100 µs time constant - fast enough to track LTE TDD slot transitions without droop-induced capacitance error.