Texas Instruments THS4211DR

Overview

THS4211DR from Texas Instruments is a unity-gain stable, voltage-feedback operational amplifier optimized for high-linearity signal conditioning in wideband analog systems. It delivers 970 V/µs slew rate, 1 GHz small-signal bandwidth (±5 V), –90 dBc THD at 30 MHz, 130-MHz 0.1-dB flat bandwidth (G = 2), and ±4.0 V output swing into 499 Ω - enabling use as ADC driver, DAC buffer, or video line driver in test equipment and communications infrastructure.

For engineers reviewing the THS4211DR datasheet, THS4211DR pinout, THS4211DR application, or THS4211DR equivalent, key selection criteria include its distortion performance at 30–70 MHz, thermal management requirements for SOIC-8 PowerPAD™, supply flexibility (±2.5 V to ±7.5 V or 5–15 V), and verified video-grade differential gain (0.007%) and phase (0.003°) compliance.

Technical Context

The THS4211DR employs a voltage-feedback architecture with internal compensation for unconditional unity-gain stability, eliminating external compensation networks required by decompensated amplifiers. Its high slew rate and low input capacitance (0.2 pF differential) support fast transient response and minimal phase shift in closed-loop configurations up to 1 GHz.

Designed for dual-supply (±5 V typical) or single-supply (5 V) operation, it maintains specified AC performance across –40°C to +85°C with robust PSRR (>64 dB) and CMRR (>56 dB). The device's output stage drives ≥170 mA into low-impedance loads while sustaining <0.1-dB gain flatness to 130 MHz at G = 2 - critical for baseband and IF signal chains.

Key Specifications

Pinout & Package

THS4211DR is packaged in an 8-pin SOIC with PowerPAD™ thermal pad (D package), requiring solder connection of the exposed pad to a PCB ground plane for junction temperature control below +125°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4211DR, THS4215DR adds power-down control at the cost of one dedicated pin, while LMH6629MA/NOPB trades unity-gain stability for lower noise and higher precision - making THS4211DR the optimal choice for flexible, stable, wideband buffering where power gating is unnecessary.

Availability

THS4211DR is available at Aetrix Electronics and suitable for high-speed data acquisition, video signal routing, and RF test equipment requiring stable component supply with guaranteed long-term manufacturability.

Supply support for THS4211DR 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 op-amps and signal chain solutions.

The THS4211DR belongs to TI's high-speed voltage-feedback amplifier product line, engineered specifically for demanding wideband applications including communications infrastructure, medical imaging, and automated test equipment where distortion, bandwidth, and settling time are critical.

FAQ

What supply voltages are supported by the THS4211DR?

The THS4211DR operates from dual supplies of ±2.5 V to ±7.5 V or single supplies of 5 V to 15 V. At ±5 V, it achieves 1 GHz small-signal bandwidth and 970 V/µs slew rate; at 5 V, bandwidth reduces to 980 MHz with 800 V/µs slew rate. Quiescent current remains 19–24 mA across this range, enabling flexible system-level power architecture design without performance compromise.

Does the THS4211DR require external compensation for unity-gain stability?

No, the THS4211DR is internally compensated for unconditional unity-gain stability. Unlike decompensated amplifiers, it does not require external capacitors or resistors to maintain phase margin in G = 1 configurations. This simplifies layout, reduces component count, and ensures predictable transient response - verified across temperature (–40°C to +85°C) and supply variations per TI SLOS400E datasheet.

How does the THS4211DR's PowerPAD™ package affect thermal design?

The THS4211DR's SOIC-8 PowerPAD™ package requires the exposed thermal pad to be soldered to a PCB copper plane tied to ground. Without this connection, θJA rises to 260°C/W (vs. 97.5°C/W with proper thermal pad), risking junction temperatures exceeding +125°C during sustained 1-GHz operation. TI recommends minimum 4-layer board construction with dedicated inner-layer thermal planes for reliable high-power-density deployment.

Can the THS4211DR drive 150 Ω video loads while maintaining NTSC/PAL specifications?

Yes, the THS4211DR delivers 0.007% differential gain error and 0.003° differential phase error into 150 Ω loads at G = 2, fully compliant with NTSC and PAL broadcast video standards. Its 170 mA output current capability and ±4.0 V swing allow direct interface to coaxial video lines without external buffers, and harmonic distortion remains ≤–80 dBc at 30 MHz under these conditions - preserving color fidelity and timing accuracy.

What is the maximum recommended load capacitance for stable operation of the THS4211DR?

The THS4211DR remains stable with up to 100 pF capacitive load when isolated by a 15 Ω series resistor (R_ISO), per Figure 24 in the SLOS400E datasheet. Without isolation, stability degrades above ~20 pF due to phase lag introduced by the load. For direct capacitive loading (e.g., ADC input capacitance), TI recommends using R_ISO = 15 Ω and verifying step response overshoot remains <5% - critical for high-fidelity sampling applications.