Texas Instruments THS4302RGTT

Overview

THS4302RGTT from Texas Instruments is a wideband fixed-gain voltage-feedback operational amplifier with +5 V/V (14 dB) gain, 2.4 GHz small-signal bandwidth, 5500 V/μs slew rate, 2.8 nV/√Hz input-referred noise, and ±180 mA output drive capability. It operates from single 3–5 V or dual ±1.5–±2.5 V supplies and targets high-speed signal conditioning in RF IF chains, ADC preamplification, and DAC output buffering.

For engineers reviewing the THS4302RGTT datasheet, THS4302RGTT pinout, THS4302RGTT application, or THS4302RGTT equivalent, key selection criteria include its 2.4 GHz bandwidth at G = +5, power-down functionality (PD pin), PowerPAD™ thermal package, and verified performance driving 100 Ω loads with <−81 dBc HD3 at 70 MHz.

Technical Context

The THS4302RGTT uses a voltage-feedback architecture with internal 50 Ω Rg and 200 Ω Rf resistors to fix gain at +5 V/V. Its high slew rate and low distortion stem from optimized transconductance stages and careful compensation for stability into 100 Ω loads.

It integrates a dedicated power-down pin (PD) that reduces quiescent current from 37 mA to 0.8 mA, with 6 μs turn-on and 5 μs turn-off delays. The RGT-16 leadless package features an exposed PowerPAD™ thermally enhanced die attach requiring PCB copper connection for junction temperature control below 125°C.

Key Specifications

Pinout & Package

The THS4302RGTT is housed in a 16-pin leadless RGT package (QFN-style) with an exposed PowerPAD™ thermal pad on the underside, requiring solder connection to a PCB thermal plane for reliable operation at full performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar wideband fixed-gain amplifier applications.

Compared with LMH6401IRRT and ADA4870ARQZ, the THS4302RGTT uniquely combines factory-trimmed +5 V/V gain, 2.4 GHz bandwidth, and integrated power-down in a thermally robust QFN-making it the lowest-risk choice for production IF amplifiers and ADC drivers where gain accuracy and thermal management are critical.

Availability

THS4302RGTT is available at Aetrix Electronics and suitable for wireless infrastructure, high-speed data acquisition, and test equipment applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for THS4302RGTT 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 high-performance signal chain solutions.

The THS4302RGTT belongs to TI's high-speed operational amplifier product line, engineered specifically for wideband, low-distortion signal conditioning in RF, IF, and high-speed data converter interfaces.

FAQ

What is the exact gain configuration of the THS4302RGTT and how is it implemented?

The THS4302RGTT is internally configured for noninverting +5 V/V (14 dB) gain using factory-trimmed 50 Ω Rg and 200 Ω Rf resistors. These resistors are not accessible externally - the gain is fixed and cannot be adjusted. This eliminates gain-setting resistor tolerance errors and improves production consistency across units. The THS4302RGTT achieves this while maintaining 2.4 GHz bandwidth and low distortion, making it ideal for applications where gain accuracy and repeatability are critical.

Does the THS4302RGTT support single-supply operation, and what are the input/output voltage limitations?

Yes, the THS4302RGTT supports single-supply operation from 3 V to 5 V. Its common-mode input range is VS− +1 V to VS+ −1 V, and its output voltage swing is typically 1.2 V to 3.8 V (with 5 V supply) into 100 Ω. For optimal performance, biasing networks (e.g., Figure 45 in the datasheet) are recommended to center the input signal within the valid common-mode window. The THS4302RGTT does not feature rail-to-rail I/O, so proper DC biasing is essential in single-supply configurations.

How does the power-down feature of the THS4302RGTT function, and what is its impact on output impedance?

The THS4302RGTT features a dedicated PD pin (Pin 6) that, when driven low (<0.9 V), reduces quiescent current from 37 mA to 0.8 mA. Turn-on and turn-off delays are 6 μs and 5 μs respectively. Importantly, the power-down mode does not place the output in high-impedance state - output impedance remains dominated by the internal feedback network. Therefore, the THS4302RGTT should not be used as a 3-state bus driver; it is intended solely for dynamic power reduction during idle periods.

What thermal management requirements apply to the THS4302RGTT due to its PowerPAD™ package?

The THS4302RGTT uses an RGT-16 package with an exposed PowerPAD™ thermal pad that must be soldered to a PCB copper pour for effective heat dissipation. TI specifies θJC = 2.4 °C/W and recommends keeping junction temperature ≤125°C for long-term reliability. Without proper thermal connection, the device may exceed safe operating limits under full load. Layout guidelines require ≥2 in² internal copper area connected via ≥4 thermal vias (0.3 mm diameter) to inner ground planes - failure to implement this risks thermal shutdown or accelerated parametric drift.

Can the THS4302RGTT drive capacitive loads, and what isolation techniques are recommended?

The THS4302RGTT is sensitive to capacitive loading >2 pF, which can cause peaking or instability. TI recommends adding a series isolation resistor (RISO) close to the output pin - values range from 8 Ω (for 100 pF load) to 24.9 Ω (for 10 pF) depending on load capacitance. This technique preserves flat frequency response and pulse fidelity. Direct connection to ADC inputs or cables without RISO is discouraged; the THS4302RGTT datasheet provides measured curves (Figure 48) validating RISO selection versus capacitive load for stable operation.