Texas Instruments TRF370315IRGET

Overview

TRF370315IRGET from Texas Instruments is a 0.35–4 GHz direct quadrature modulator IC designed for high-performance RF upconversion in cellular base station transmit channels. It features 1.5-V common-mode baseband inputs, 9.5 dBm P1dB output compression, 23 dBm OIP3, and –163 dBm/Hz noise floor at 20 MHz offset - enabling WCDMA and EDGE signal generation with <0.74% EVM at 0 dBm output.

For engineers reviewing the TRF370315IRGET datasheet, TRF370315IRGET pinout, TRF370315IRGET application, or TRF370315IRGET equivalent, this page delivers verified RF modulator specifications, validated 24-pin QFN package layout, real-world ACPR and sideband suppression performance across 350–4000 MHz, and precise I/Q interface design guidance for GSM/WCDMA transmitters.

Technical Context

The TRF370315IRGET implements a double-balanced mixer core with integrated differential-to-single-ended RF output stage and on-chip RF amplifier capable of driving 50-Ω loads directly. Its architecture supports unadjusted carrier feedthrough as low as –40 dBm and sideband suppression down to –47 dBc without external calibration.

It operates from a single 4.5–5.5 V supply, accepts LO input from –5 to +12 dBm (50 Ω, single-ended), and requires precisely matched 1.5-V CM differential I/Q baseband signals (BBIP/BBIN, BBQP/BBQN) with 10-kΩ input resistance and 3-pF parallel capacitance per channel.

Key Specifications

Pinout & Package

TRF370315IRGET is housed in a 24-pin QFN package (4 mm × 4 mm, 0.5-mm pitch) with exposed thermal pad. Pin numbering follows top-view orientation with pin 1 at bottom-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quadrature modulator applications.

Compared with TRF370333IRGET, the TRF370315IRGET enables lower-power DAC integration and reduced baseband driver complexity; versus ADL5375-05, it offers simplified RF output interface and superior unadjusted sideband suppression below 2 GHz - critical for cost-sensitive WCDMA infrastructure.

Availability

TRF370315IRGET is available at Aetrix Electronics and suitable for cellular base station transmit channels, WCDMA wideband transmitters, and GSM/EDGE infrastructure requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for TRF370315IRGET 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with over 50 years of innovation in RF and mixed-signal ICs.

The TRF370315IRGET belongs to TI's high-linearity RF modulator product line, engineered specifically for cellular infrastructure transmitters demanding low EVM, high ACPR, and wideband operation from 350 MHz to 4 GHz.

FAQ

What is the baseband input common-mode voltage requirement for TRF370315IRGET?

The TRF370315IRGET requires a precise 1.5-V dc common-mode voltage on all four differential baseband inputs (BBIP/BBIN and BBQP/BBQN). This is a fixed specification - unlike the TRF370333IRGET which uses 3.3 V - and must be maintained within ±50 mV to achieve specified sideband suppression and carrier feedthrough performance. Deviation beyond this range degrades unadjusted sideband suppression by up to 10 dBc.

Does TRF370315IRGET require external RF output matching components?

No, TRF370315IRGET does not require external RF output matching components. Its integrated RF amplifier is designed to drive a 50-Ω load directly. The RF_OUT pin (pin 16) must be ac-coupled using a 100-pF capacitor per TI's EVM schematic, but no series/shunt impedance networks or baluns are needed - simplifying layout and reducing bill-of-materials cost in BTS and small-cell designs.

What LO input configuration does TRF370315IRGET support?

TRF370315IRGET accepts a single-ended LO signal applied to LOP (pin 3), while LON (pin 4) must be terminated to ground with a 50-Ω resistor. The LO input operates from –5 dBm to +12 dBm into 50 Ω, covering standard synthesizer output levels without external amplification or attenuation. LO port return loss exceeds 15 dB across the full 0.35–4 GHz range.

How does TRF370315IRGET perform in multi-carrier WCDMA applications?

In four-carrier WCDMA operation at 2140 MHz, TRF370315IRGET achieves –68 dBc adjacent-channel power ratio (ACPR) at –23 dBm per carrier output power. This performance is enabled by its 23 dBm OIP3 and –162 dBm/Hz noise floor at 20-MHz offset, allowing compliant transmitter designs without digital predistortion in macrocell and distributed antenna systems.

Is TRF370315IRGET pin-compatible with TRF370333IRGET?

Yes, TRF370315IRGET and TRF370333IRGET share identical 24-pin QFN package dimensions, pinout, and mechanical footprint. However, they are not functionally interchangeable without redesigning the baseband interface - TRF370315IRGET requires 1.5-V CM I/Q inputs, while TRF370333IRGET requires 3.3-V CM. Swapping them without adjusting DAC output levels will cause severe degradation in sideband suppression and EVM.