STMicroelectronics STPTIC-27F1M6

Overview

STPTIC-27F1M6 from STMicroelectronics is a Parascan™ tunable integrated capacitor with nominal capacitance of 2.7 pF, DC–3 GHz operating frequency range, 3.5:1 tuning ratio (C_2V/C_20V), +36 dBm input power handling, and Q-factor of 65 at 900 MHz. It serves as a voltage-controlled RF matching element in antenna tuning networks for multi-band mobile handsets.

For engineers reviewing the STPTIC-27F1M6 datasheet, STPTIC-27F1M6 pinout, STPTIC-27F1M6 application, or STPTIC-27F1M6 equivalent, key selection criteria include bias voltage range (2–20 V), leakage current (<100 nA at 20 V), transition time (100–135 µs), shunt/series configuration compatibility, and µQFN-6L package footprint compliance.

Technical Context

The STPTIC-27F1M6 implements barium strontium titanate (BST)-based Parascan tunable dielectric technology, enabling analog voltage control of capacitance without moving parts. Its operation relies on DC bias modulation (2–20 V) across a high-isolation structure where RF ports are DC-blocked.

It delivers linear RF performance with IP3 of 60 dBm at 2 V bias and 70 dBm at 20 V bias, second/third harmonic suppression ≥−65 dBm and ≥−45 dBm respectively, and operates stably under +35 dBm LTE burst conditions at −30 to +85 °C ambient.

Key Specifications

Pinout & Package

STPTIC-27F1M6 is housed in a lead-free, ECOPACK®2-compliant µQFN-6L package (1.2 × 1.6 × 0.9 mm), with exposed thermal pad and solder-mask-defined land pattern per Figure 3 of DocID023772 Rev 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AVX FMC1227 and Qorvo QM3327, STPTIC-27F1M6 offers optimal balance of tuning range, Q-factor, and µQFN-6L footprint density-making it ideal for space-constrained LTE/WCDMA flagship designs requiring rapid impedance adaptation.

Availability

STPTIC-27F1M6 is available at Aetrix Electronics and suitable for cellular antenna matching networks, open-loop RF filters, NFC tuning circuits, and Wi-Fi diversity matching requiring stable component supply, consistent parametric performance, and full production traceability.

Supply support for STPTIC-27F1M6 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 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 discrete varactor diodes and fixed capacitor banks in adaptive antenna systems for 4G/5G mobile devices.

FAQ

What is the recommended PCB layout for STPTIC-27F1M6's µQFN-6L package?

Use the land pattern in Figure 3 of DocID023772 Rev 4: 0.35 mm × 0.425 mm pads for RF1/RF2 terminals, 0.25 mm × 0.5 mm pad for DC BIAS (A1), and 0.7 mm × 0.9 mm thermal pad centered under the package. Maintain 250 µm solder mask opening around each pad and avoid vias directly under the thermal pad.

Can STPTIC-27F1M6 be used in series configuration with no external DC blocking?

Yes - its RF ports are internally DC-blocked, allowing direct series placement between RF transceiver and antenna without additional capacitors. The DC bias terminal (A1) remains isolated from RF paths, preserving signal integrity while enabling analog tuning.

What is the maximum allowable bias voltage slew rate to avoid transient capacitance overshoot?

ST specifies no explicit slew rate limit, but empirical testing shows stable settling within 135 µs for full C_min→C_max transition using a 10 kΩ series resistor and 100 nF local decoupling. Faster edges (>1 V/µs) may induce ringing; a 1–10 kΩ RC filter at the bias input is recommended for noise immunity.

How does temperature affect capacitance tuning linearity across −30 to +85 °C?

Capacitance shift is ±5% over temperature at fixed bias voltage; however, the C_2V/C_20V tuning ratio remains stable within ±0.2:1. System-level calibration algorithms typically compensate residual drift using factory-measured lookup tables stored in baseband processor memory.