Texas Instruments TRF370315IRGER

Overview

TRF370315IRGER from Texas Instruments is a 0.35–4 GHz direct quadrature modulator IC used in RF transmit signal chains to convert complex I/Q baseband signals directly to RF. It features 1.5-V common-mode baseband inputs, 9.5-dBm P1dB output compression, 23-dBm OIP3, –163 dBm/Hz noise floor at 20-MHz offset, and supports WCDMA/EDGE cellular base station applications.

For engineers reviewing the TRF370315IRGER datasheet, TRF370315IRGER pinout, TRF370315IRGER application, or TRF370315IRGER equivalent, key selection criteria include unadjusted sideband suppression (–47 dBc at 2.14 GHz), carrier feedthrough (–40 dBm), LO input power range (–5 to +12 dBm), and compatibility with 4.5–5.5-V single-supply operation.

Technical Context

The TRF370315IRGER implements a double-balanced mixer architecture with integrated differential-to-single-ended RF output stage capable of driving 50-Ω loads without external components. Its I/Q baseband inputs are optimized for 1.5-V common-mode voltage, distinguishing it from the TRF370333 variant.

It operates across 0.35–4 GHz LO frequencies with measured performance including 63-dBm IP2 at 2.5 GHz, 8.5-dB output return loss at 2.14 GHz, and ACPR of –75.8 dBc for 1-WCDMA signal at –13 dBm output power - all under 5-V supply and 25°C conditions.

Key Specifications

Pinout & Package

TRF370315IRGER 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 per TI SLWS184J Rev J.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TRF370333IRGER and ADL5375-05ACPZ-R7, the TRF370315IRGER offers optimal integration for 1.5-V DAC-based WCDMA/EDGE transmitters, delivering superior sideband suppression (–47 dBc) and lower noise floor (–163 dBm/Hz) without requiring external calibration circuitry.

Availability

TRF370315IRGER is available at Aetrix Electronics and suitable for cellular infrastructure, wireless MAN, small-cell base stations, and broadband test equipment requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for TRF370315IRGER 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 90 years of innovation in high-performance RF and mixed-signal ICs.

The TRF3703 product line was designed specifically for high-linearity, low-noise direct-conversion RF transmitters in 3G/4G infrastructure, targeting WCDMA, LTE, and WiMAX base station applications where spectral purity and power efficiency are critical.

FAQ

What is the baseband common-mode voltage requirement for TRF370315IRGER?

The TRF370315IRGER requires a precise 1.5-V dc common-mode voltage on all four baseband inputs (BBIP, BBIN, BBQP, BBQN). This is a defining specification that differentiates it from the TRF370333IRGER (3.3-V CM). Deviation beyond ±50 mV degrades sideband suppression and carrier feedthrough performance, as confirmed in TI SLWS184J Section 7.3.

Does TRF370315IRGER support 4-GHz operation with verified performance?

Yes, TRF370315IRGER supports 4-GHz LO operation with characterized performance: at fLO = 4000 MHz and 0 dBm input, it delivers 9-dBm P1dB, 19–22-dBm OIP3, –40-dBc sideband suppression, and –2.242-dB voltage gain (TI SLWS184J, Page 7). All data is measured under recommended conditions (5 V, 25°C) and validated across temperature.

What is the thermal resistance of TRF370315IRGER and how does it impact system design?

The TRF370315IRGER has RθJA = 29.4°C/W (high-K board, still air) and RθJC = 18.6°C/W. At 205-mA supply current and 5-V supply, junction temperature rise is ~30°C above ambient - enabling reliable operation up to 85°C ambient without forced airflow, as verified in TI thermal characterization (SLWS184J, Page 3).

Can TRF370315IRGER be used with single-ended LO sources?

Yes - TRF370315IRGER accepts single-ended LO input on LOP (Pin 3) with ac-coupling (100-pF capacitor) and 50-Ω termination on LON (Pin 4) to GND, as specified in TI Application Information (SLWS184J, Page 15). LO power range is –5 to +12 dBm; return loss exceeds 15 dB across 0.35–4 GHz.

How does TRF370315IRGER achieve its –163 dBm/Hz noise floor?

The TRF370315IRGER achieves –163 dBm/Hz output noise floor at 20-MHz offset via SiGe process optimization, low-noise mixer core design, and integrated RF amplifier with controlled gain distribution - measured with 1-WCDMA signal at –13 dBm output (TI SLWS184J, Page 6). This value is confirmed at 2.14 GHz and 25°C, directly enabling high-SNR transmission in dense spectral environments.