Infineon Technologies BG5120KH6327XTSA1

Overview

BG5120KH6327XTSA1 from Infineon Technologies is a dual N-channel RF MOSFET tetrode designed for low-noise, high-dynamic-range AGC amplifier stages in UHF/VHF tuners (NTSC/PAL). It integrates two independent amplifiers in one SOT-363 package, features gate protection diodes, 0.7 V typical gate1 pinch-off voltage, 1.1 dB noise figure at 800 MHz, and 45 dB gain control range.

For engineers reviewing the BG5120KH6327XTSA1 datasheet, BG5120KH6327XTSA1 pinout, BG5120KH6327XTSA1 application, or BG5120KH6327XTSA1 equivalent, key selection criteria include dual-channel AGC linearity, sub-1.2 dB noise performance at 800 MHz, gate-source breakdown voltage ≥6 V per channel, thermal resistance ≤280 K/W, and RoHS-compliant AEC-Q101 qualification for tuner front-end designs.

Technical Context

This device implements a dual-gate tetrode architecture where Gate 1 serves as RF input with low-noise transconductance (typ. 30 mS), and Gate 2 functions as AGC control terminal. Each channel operates with independent source (Pin 5), drain (Pins 4 & 6), and gate terminals (Pins 1/3 for G1A/G1B, Pin 2 for shared G2).

It delivers 23–30 dB power gain across 45–800 MHz while maintaining 0.7–1.1 dB noise figure and >90 dBµV cross-modulation suppression at 40 dB AGC. The integrated ESD protection diodes on both gates support robust handling in tuner module assembly.

Key Specifications

Pinout & Package

Package: SOT-363 (SC-88), 6-pin plastic surface-mount package with exposed thermal pad (not electrically connected). Dimensions: 2.1 × 2.0 × 0.9 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-gate RF amplifier applications.

Compared with BF998 and MRF901LT1G, BG5120KH6327XTSA1 uniquely combines dual-channel integration, AEC-Q101 qualification, on-chip ESD protection, and sub-1.2 dB noise figure-making it irreplaceable for space-constrained, automotive-grade tuner designs requiring analog AGC.

Availability

BG5120KH6327XTSA1 is available at Aetrix Electronics and suitable for analog TV tuners, digital terrestrial TV receivers, automotive radio modules, and dual-conversion broadcast equipment requiring stable component supply and AEC-Q101 assurance.

Supply support for BG5120KH6327XTSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, RF, and automotive ICs, with leadership in silicon-based RF solutions for broadcast and wireless infrastructure.

BG5120KH6327XTSA1 belongs to Infineon's RF Transistor product line, engineered specifically for high-linearity, low-noise AGC amplifier stages in broadcast tuner front-ends and automotive infotainment systems.

FAQ

What is the maximum allowable gate-source voltage for each channel?

The absolute maximum gate1-source and gate2-source voltage is ±6 V per channel, verified under conditions where the opposing gate is held at 0 V and V_DS = 0 V. Exceeding this risks permanent gate oxide damage, especially during ESD events or improper bias sequencing.

How is thermal performance validated in the SOT-363 package?

Thermal resistance R_th(ch-s) is measured from channel to solder point under JEDEC JESD51-14 guidelines, yielding ≤280 K/W. This value assumes 25 mm² copper pour on PCB layer 1 with 2 internal thermal vias under the exposed pad, enabling reliable operation at 200 mW P_tot up to 85 °C ambient.

Can Gate 2 be driven with PWM instead of analog voltage?

No-Gate 2 is designed for continuous analog AGC control (0–4 V DC). Applying PWM introduces harmonic content that modulates gain nonlinearly, degrading cross-modulation performance and causing spurious responses above –40 dBc in tuner IF spectra.

Is the common source (Pin 5) internally bonded to the thermal pad?

No-the exposed thermal pad in the SOT-363 package is electrically isolated and intended solely for thermal conduction. Pin 5 (common source) is the sole electrical connection to the source nodes; the pad must be soldered to a dedicated thermal plane but not shorted to any signal net.