Texas Instruments TRF37T05IRGET

Overview

TRF37T05IRGET from Texas Instruments is a 300-MHz to 4-GHz direct quadrature modulator IC used in RF transmitter signal chains to convert complex baseband I/Q signals directly to RF. It delivers 30 dBm output IP3 at 1840 MHz, –160 dBm/Hz noise floor, and 78-dBc WCDMA ACPR at –10-dBm channel power, enabling high-linearity cellular base station upconversion.

For engineers reviewing the TRF37T05IRGET datasheet, TRF37T05IRGET pinout, TRF37T05IRGET application, or TRF37T05IRGET equivalent, this page provides verified functional context, validated pin roles, confirmed RF performance across 300–4000 MHz, and real-world TDD-compatible deployment guidance for LTE, WCDMA, and TD-LTE transmitters.

Technical Context

The TRF37T05IRGET implements a double-balanced mixer architecture with differential I/Q baseband inputs (BBIP/BBIM/BBQP/BBQM), single-ended RF output (RFOUT), and differential LO interface (LOP/LOM). It operates from a single 3.3-V supply and requires 0.25-V common-mode voltage on baseband inputs for optimal linearity.

Its fast power-down (0.2 μs turn-off) and 1-bit gain control (GC) enable dynamic TDD operation. Carrier suppression (–40 dBm unadjusted) and sideband suppression (–45 dBc unadjusted) are achieved without external calibration circuitry, supporting immediate integration into wideband wireless MAN and multicarrier GSM systems.

Key Specifications

Pinout & Package

The TRF37T05IRGET is housed in a 24-pin RGE VQFN package (4.00 mm × 4.00 mm) with exposed thermal pad for enhanced RF thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADL5375-05ACPZ-R7 and LMX2594RHAR, the TRF37T05IRGET offers superior TDD responsiveness (0.2 μs PD), lower power consumption (306 mA active), and optimized carrier suppression for cellular infrastructure-making it ideal for cost-sensitive, high-volume base station radios where timing precision and calibration simplicity are paramount.

Availability

TRF37T05IRGET is available at Aetrix Electronics and suitable for cellular base station transmitters, TD-LTE small cells, and wireless MAN wideband transceivers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TRF37T05IRGET 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 solutions for industrial, automotive, and communications markets.

The TRF37T05IRGET belongs to TI's RF silicon modulator product line, engineered specifically for high-linearity, low-noise upconversion in 3G/4G/5G infrastructure equipment where spectral purity and TDD timing integrity are critical.

FAQ

What is the RF frequency range supported by the TRF37T05IRGET?

The TRF37T05IRGET supports RF upconversion from 300 MHz to 4 GHz, covering all major cellular bands including 700 MHz LTE, 1800/1900 MHz WCDMA, 2100/2600 MHz TD-LTE, and 3500 MHz CBRS/WiMAX. Performance metrics such as OIP3 and noise floor are characterized across this full range, with datasheet validation at key frequencies including 400, 750, 900, 1840, 2140, 2600, and 3500 MHz.

Does the TRF37T05IRGET require external calibration for carrier suppression?

No, the TRF37T05IRGET achieves –40 dBm unadjusted carrier feedthrough and –45 dBc unadjusted sideband suppression without factory or runtime calibration. These values are measured under standard conditions (VCM = 0.25 V, GC low, LO = 0 dBm) and remain stable across temperature (–40°C to +85°C) and supply voltage (3.15–3.45 V), reducing production test overhead.

How does the 1-bit gain control (GC) pin affect RF output performance?

The GC pin on the TRF37T05IRGET selects between two linear gain states: low-gain mode (–1.9 dB typical voltage gain) and high-gain mode (+3 dB typical at 750 MHz). This enables dynamic output power adjustment without compromising linearity-OIP3 remains ≥30 dBm in both modes-and eliminates need for external digital step attenuators in adaptive transmit power control loops.

What is the recommended baseband common-mode voltage for optimal TRF37T05IRGET linearity?

The TRF37T05IRGET requires a precise 0.25-V DC common-mode voltage on all four baseband inputs (BBIP, BBIM, BBQP, BBQM) to achieve specified linearity, carrier suppression, and sideband suppression. Deviations beyond ±0.05 V degrade OIP3 by up to 4 dB and increase carrier feedthrough by 8 dB; TI recommends using a dedicated low-noise 0.25-V reference or resistor-divider with bypass capacitor.

Can the TRF37T05IRGET drive a 50-Ω load directly without external matching components?

Yes-the TRF37T05IRGET integrates a differential-to-single-ended RF output stage designed to drive a 50-Ω load directly. The datasheet specifies performance using a "standard broadband output matching circuit," but evaluation modules confirm usable output power (e.g., 4.2 dBm at 750 MHz) and ACPR with only a series DC-blocking capacitor and shunt 50-Ω termination, minimizing external RF component count.