NXP Semiconductors BF1210,115

Overview

BF1210,115 from NXP Semiconductors is a dual N-channel dual-gate MOSFET amplifier IC in a single SOT363 package, integrating two independent low-noise gain-controlled amplifiers (AMP A and AMP B) with shared source and gate2 terminals. It delivers 31 mS forward transfer admittance (AMP A), 0.9 dB noise figure at 400 MHz (AMP A), and 105 dBµV cross modulation performance at 40 dB AGC - optimized for 5 V supply VHF/UHF tuner front-ends.

For engineers reviewing the BF1210,115 datasheet, BF1210,115 pinout, BF1210,115 application, or BF1210,115 equivalent, this device serves as a high-linearity, AGC-stable RF amplifier for broadcast and professional communication receivers where simultaneous dual-channel amplification, ESD-sensitive handling, and micro-miniature surface-mount integration are required.

Technical Context

The BF1210,115 implements two discrete dual-gate MOSFET structures sharing substrate and source connections, enabling DC stabilization via internal bias circuits. Gate1 (G1A/G1B) controls transconductance while Gate2 (G2) provides AGC voltage input - allowing dynamic gain reduction without degrading cross modulation.

Each amplifier operates in common-source configuration with integrated protection diodes between gates and source. Its SOT363 package supports high-frequency operation up to 1 GHz, with measured S-parameters confirming stable s21 gain (3.14 ratio at 40 MHz) and low reverse isolation (s12 < 0.004 at 400 MHz).

Key Specifications

Pinout & Package

SOT363 plastic surface-mounted package (6-pin, 2.2 mm × 1.35 mm footprint); thermally enhanced for RF amplifier duty with exposed source pad connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BF1210,115, BF1212,115 offers higher gain and independent AGC at the cost of increased complexity, while BF998,115 reduces integration but increases layout area and external component count - making BF1210,115 optimal for space-constrained dual-channel VHF/UHF front-ends.

Availability

BF1210,115 is available at Aetrix Electronics and suitable for digital television tuners, analog broadcast receivers, professional communication equipment, and UHF wireless microphone systems requiring stable component supply across long production lifecycles.

Supply support for BF1210,115 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with over 50 years of RF transistor heritage.

The BF1210,115 belongs to NXP's legacy RF amplifier product line designed specifically for broadcast and professional wireless infrastructure - emphasizing low noise, high linearity, and AGC stability in miniature surface-mount packages.

FAQ

What is the maximum operating frequency range supported by the BF1210,115?

The BF1210,115 is characterized up to 1000 MHz with verified S-parameter data, delivering usable transducer power gain (>22 dB) and low noise figure (<1.9 dB) through the UHF band (400–900 MHz). Its 2.2 pF C_iss(G1) and 240 K/W thermal resistance make it suitable for stable operation in 824–849 MHz wireless microphone receivers and 470–750 MHz DVB-T tuners. The BF1210,115 maintains cross modulation performance above 100 dBµV even at 800 MHz.

How does the shared gate2 terminal function in the BF1210,115?

In the BF1210,115, Pin 2 (gate2) is internally connected to both amplifier channels, enabling synchronized AGC action across AMP A and AMP B using a single control voltage. This architecture ensures matched gain reduction without requiring separate AGC circuitry, simplifying tuner design while preserving inter-channel isolation (>30 dB). The BF1210,115 achieves 105 dBµV cross modulation at 40 dB AGC due to this shared control topology.

What thermal design considerations apply to the BF1210,115 in continuous RF operation?

The BF1210,115 has a junction-to-solder-point thermal resistance of 240 K/W and a maximum junction temperature of 150 °C. For continuous 180 mW dissipation, the source pad (Pin 5) must be connected to ≥100 mm² of 2-oz copper with thermal vias to inner ground planes. The BF1210,115 datasheet specifies T_sp ≤ 107 °C at solder point - requiring reflow profiles that limit peak temperature to 260 °C for ≤10 seconds to avoid die attach degradation.

Can the BF1210,115 be used with 3.3 V supply instead of the specified 5 V?

The BF1210,115 is characterized and guaranteed only at 5 V drain-source voltage (V_DS). Operating at 3.3 V reduces |y_fs| by ~25%, increases noise figure by 0.3–0.5 dB, and degrades cross modulation by 5–8 dBµV due to reduced channel pinch-off margin. While functional at 3.3 V, the BF1210,115 does not meet its published specifications - use only in non-critical applications where the full BF1210,115 performance envelope is not required.

What ESD precautions are mandatory when handling the BF1210,115?

The BF1210,115 is highly sensitive to electrostatic discharge (ESD), with gate oxide breakdown thresholds below 100 V. Handling requires Class 0 ESD controls: grounded wrist straps, dissipative mats, ionized air, and conductive foam storage. The BF1210,115's integrated gate-source diodes protect against transient surges but do not eliminate risk from direct human-body-model (HBM) discharges - untrained personnel must never touch pins without proper grounding.