Texas Instruments THS4211DGN

Overview

THS4211DGN from Texas Instruments is a low-distortion, high-speed voltage feedback amplifier in an 8-pin MSOP-PowerPAD™ package. It delivers 970 V/µs slew rate, 1 GHz small-signal bandwidth (±5 V), –90 dBc THD at 30 MHz, 0.007% differential gain, and ±4.0 V output swing into 10 Ω - enabling high-fidelity signal conditioning in ADC preamplifier and video driver applications.

For engineers reviewing the THS4211DGN datasheet, THS4211DGN pinout, THS4211DGN application, or THS4211DGN equivalent, key selection criteria include unity-gain stability, harmonic distortion performance at 30–70 MHz, thermal management of the PowerPAD™, supply flexibility (±2.5 V to ±7.5 V or 5–15 V), and compatibility with 150 Ω video loads.

Technical Context

The THS4211DGN employs a voltage-feedback architecture optimized for wideband, low-distortion operation without requiring external compensation. Its internal compensation ensures unity-gain stability across temperature and supply variations while maintaining 1 GHz small-signal bandwidth under ±5 V operation.

It features symmetrical input stage design with 4 MΩ common-mode input resistance and 0.3/0.2 pF (CM/DM) input capacitance, supporting precise differential-to-single-ended conversion. Output drive capability reaches 220 mA sourcing and 170 mA sinking into 10 Ω, with closed-loop output impedance below 0.3 Ω at 1 MHz.

Key Specifications

Pinout & Package

The THS4211DGN uses an 8-pin MSOP package with exposed thermal pad (PowerPAD™), requiring solder connection to a PCB thermal plane for reliable power dissipation (θ_JA = 58.4°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed voltage feedback amplifier applications.

Compared with THS4211DGN, THS4215DGN adds power-down functionality without sacrificing bandwidth or linearity, while THS4503DR trades single-ended convenience for superior CMRR and differential drive capability - making THS4211DGN optimal for cost-sensitive, fixed-power, single-ended signal chain stages.

Availability

THS4211DGN is available at Aetrix Electronics and suitable for high-speed data acquisition, video signal distribution, and communications infrastructure requiring stable component supply, guaranteed long-term availability, and traceable sourcing.

Supply support for THS4211DGN 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 decades of expertise in high-performance amplifiers and precision signal chain solutions.

The THS4211 product line was engineered for demanding wideband analog applications including video, instrumentation, and high-speed data converters - prioritizing distortion performance, stability, and thermal robustness in compact packages.

FAQ

What is the maximum recommended supply voltage for THS4211DGN?

The absolute maximum supply voltage for THS4211DGN is ±8.25 V (16.5 V total), but the recommended operating range is ±2.5 V to ±7.5 V for dual supplies or 5 V to 15 V for single supply. Operating beyond ±7.5 V risks exceeding thermal limits and degrading distortion performance, especially at high output currents. Always reference the Dissipation Ratings Table to ensure junction temperature remains ≤+125°C.

Does THS4211DGN require external compensation for unity-gain stability?

No, THS4211DGN is internally compensated for unity-gain stability across its full operating temperature and supply range. No external compensation components are needed - unlike decompensated amplifiers - simplifying layout and ensuring predictable phase margin (>45°) even with capacitive loads up to 100 pF. This eliminates risk of oscillation in G = 1 configurations used in ADC buffering and video line driving.

How should the PowerPAD™ thermal pad on THS4211DGN be connected?

TI specifies that the PowerPAD™ on THS4211DGN must be soldered to a large, low-thermal-resistance PCB copper plane (ideally connected to ground) to achieve rated θ_JA = 58.4°C/W. Leaving it unconnected raises junction temperature by >40°C at 100 mW dissipation, risking thermal shutdown or accelerated parametric drift. Use ≥4 thermal vias (0.3 mm diameter) under the pad, filled or plated, tied to inner ground layers.

Can THS4211DGN drive a 75 Ω video load directly?

Yes, THS4211DGN can drive a 75 Ω load directly in DC-coupled configurations, delivering ±1 V_PP with <0.01% gain error and –82 dBc HD3 at 30 MHz (RL = 499 Ω). For 75 Ω, use G = 2 with R_f = 392 Ω and match output to 75 Ω via series resistor (e.g., 37.5 Ω) to maintain stability and minimize reflections. Avoid AC-coupling unless DC offset tolerance permits.

What is the typical settling time of THS4211DGN for a 2 V step input?

THS4211DGN achieves 22 ns settling to 0.1% and 55 ns to 0.01% for a 2 V step at G = –1, measured with RL = 499 Ω and R_f = 392 Ω under ±5 V supplies. This performance holds across –40°C to +85°C, making it suitable for fast-pulse applications like time-of-flight measurement and high-speed waveform generation where timing accuracy is critical.