Texas Instruments THS4304D

Overview

THS4304D from Texas Instruments is a wideband voltage-feedback operational amplifier optimized for high-speed ADC driver and active filter applications. It delivers 3 GHz small-signal bandwidth at G = +1, 830 V/µs slew rate, 2.4 nV/√Hz input voltage noise, and operates from a single 5-V supply with 18 mA quiescent current. It is used in RF/telecom signal chains and ultrasound front-ends where wide dynamic range and low distortion are critical.

For engineers reviewing the THS4304D datasheet, THS4304D pinout, THS4304D application, or THS4304D equivalent, key selection criteria include its 3 GHz unity-gain bandwidth, differential ADC drive capability, SOIC-8 package thermal performance (1.02 W at TA ≤ 25°C), and verified harmonic distortion of –84 dBc at 10 MHz with 2-VPP output into 100 Ω.

Technical Context

The THS4304D implements a traditional voltage-feedback topology with balanced inputs, low offset voltage (≤5 mV), and high common-mode rejection (≥95 dB at 25°C). Its BiCom3 silicon germanium process enables full performance on single 5-V supply-eliminating need for ±5-V rails while maintaining SNR and SFDR comparable to legacy 10-V op-amps.

It supports non-inverting and inverting configurations with recommended 249-Ω feedback resistor for G = +2. Layout-critical design requires minimized parasitic capacitance at inverting input and short, direct feedback traces to preserve phase margin and prevent peaking above 300 MHz.

Key Specifications

Pinout & Package

THS4304D is housed in an 8-pin SOIC package (D suffix) with standard JEDEC MS-012AC footprint. Thermal resistance θJA = 97.5°C/W enables reliable operation at 410 mW max power dissipation under TA = 85°C conditions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar wideband op-amp applications.

Compared with LMH6702MA/NOPB and ADA4817-1ARZ, THS4304D uniquely combines 3 GHz bandwidth, 2.4 nV/√Hz noise, and single 5-V operation-making it optimal for high-fidelity, high-speed ADC driver designs where both speed and dynamic range are simultaneously constrained.

Availability

THS4304D is available at Aetrix Electronics and suitable for RF/telecom infrastructure, ultrasound imaging systems, and gamma camera signal processing requiring stable component supply across long-lifecycle medical and industrial programs.

Supply support for THS4304D 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 and embedded processing technologies, with over 90 years of innovation in high-performance signal chain components.

The THS4304D belongs to TI's high-speed operational amplifier product line, engineered specifically for single-supply, wideband ADC driver and RF signal conditioning applications demanding low noise, high linearity, and GHz-class bandwidth.

FAQ

What is the maximum output voltage swing of THS4304D into a 100-Ω load at 5-V supply?

The THS4304D delivers a minimum 3.9 VPP output voltage swing into a 100-Ω load at VS = 5 V and TA = 25°C. This is confirmed in the Electrical Characteristics table under "Output Voltage Swing" with RL = 100 Ω, and enables full-scale drive of 125-MSPS ADCs such as the ADS5500 without external level-shifting circuitry. The THS4304D maintains this swing across the full operating temperature range (–40°C to +85°C).

Does THS4304D support true single-supply operation with input common-mode voltage extending below ground?

Yes, THS4304D supports true single-supply operation with an input common-mode voltage range of VS− − 0.2 V to VS+ + 0.2 V. At VS = 5 V (VS− = 0 V), this allows input signals down to –0.2 V, enabling DC-coupled interfacing with sensors or DACs that swing slightly negative. This rail-to-rail input capability is explicitly specified in the Recommended Operating Conditions table and verified across temperature.

What is the recommended feedback resistor value for THS4304D in a G = +2 non-inverting configuration?

Texas Instruments recommends a 249-Ω feedback resistor for THS4304D in G = +2 non-inverting configurations. This value balances bandwidth flatness (peaking limited to ~2 dB), distortion performance, and output loading-verified in the Application Information section and typical frequency response plots. Using 499 Ω increases peaking to ~5 dB but improves HD2 by ~3 dB; 124 Ω reduces peaking but degrades distortion with heavy loads.

How does THS4304D's harmonic distortion compare between SOIC-8 (THS4304D) and MSOP-8 (THS4304DGKR) packages?

Under identical 100-Ω load and 2-VPP output conditions at 10 MHz, THS4304D (SOIC-8) exhibits the same –84 dBc second-harmonic distortion as THS4304DGKR (MSOP-8), as confirmed in Figure 9 and the Electrical Characteristics table. Package-induced differences in HD2 are only observed under light loading (>499 Ω), where both packages perform identically; TI documentation confirms no performance differentiation between D and DGK variants for standard 100-Ω ADC drive use cases.

Can THS4304D be used with a 3-V supply, and what performance trade-offs occur?

Yes, THS4304D operates from 2.7 V to 5 V. At VS = 3 V, small-signal bandwidth drops to 900 MHz (vs. 3 GHz at 5 V), slew rate decreases to 750 V/µs, and output swing reduces to 1.9 VPP into 100 Ω. However, input voltage noise remains 2.4 nV/√Hz, and distortion stays within –92 dBc (2nd) at 10 MHz. These trade-offs are fully characterized in the 3-V Electrical Characteristics tables and make THS4304D viable for battery-powered instrumentation where moderate bandwidth suffices.