Texas Instruments THS4511RGTT

Overview

THS4511RGTT from Texas Instruments is a wideband, fully-differential operational amplifier optimized for 5-V single-supply data-acquisition systems. It delivers 1.6 GHz small-signal bandwidth (G = 0 dB), 4900 V/µs slew rate, and –72 dBc HD2 / –87 dBc HD3 at 70 MHz with 2 V_PP output into 200 Ω - enabling high-fidelity signal conditioning ahead of precision ADCs in medical imaging and wireless baseband chains.

For engineers reviewing the THS4511RGTT datasheet, THS4511RGTT pinout, THS4511RGTT application, or THS4511RGTT equivalent, key selection criteria include its rail-to-rail common-mode input range (–0.3 V to 2.3 V), 5-mV typical output common-mode offset control, power-down capability (0.65 mA quiescent), and QFN-16 (RGT) thermal-pad package requiring PCB thermal vias.

Technical Context

The THS4511RGTT employs a fully-differential architecture with independent common-mode voltage control via dual CM pins, allowing precise midsupply (2.5 V) or externally set output common-mode levels. Its unity-gain stability and 0 dB minimum gain requirement support direct connection to ADC inputs without external feedback networks.

It integrates dedicated power-down logic (PD pin) with 55 ns turn-on delay and 10 µs turn-off delay, while maintaining <5 mV output common-mode error over 1.25–3.75 V CM input range. The internal CM default (2.5 V) eliminates need for external biasing in standard 5-V systems.

Key Specifications

Pinout & Package

The THS4511RGTT is housed in a 16-pin leadless QFN (RGT) package with exposed thermal pad on underside, requiring solder connection to PCB ground plane for thermal management per TI SLMA002/SLMA004 guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fully-differential amplifier applications.

Compared with THS4509RGTT and LMH5401RTVT, the THS4511RGTT uniquely combines 0-dB gain operation, ultra-low distortion at 70 MHz, and integrated output common-mode control - making it the optimal choice for cost-sensitive, DC-coupled, single-supply ADC driver designs.

Availability

THS4511RGTT is available at Aetrix Electronics and suitable for 5-V data-acquisition systems, high-linearity ADC amplifiers, and medical imaging equipment requiring stable component supply across industrial temperature ranges (–40°C to +85°C).

Supply support for THS4511RGTT 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 digital signal technologies with over 50 years of innovation in high-performance signal chain solutions.

The THS4511RGTT belongs to TI's high-speed fully-differential amplifier product line, engineered specifically for DC-coupled, single-supply data-acquisition systems demanding low noise, low distortion, and precise common-mode control.

FAQ

What is the minimum gain configuration supported by the THS4511RGTT?

The THS4511RGTT is specified for minimum gain of 0 dB and is unity-gain stable. It does not require external compensation for G = 0 dB operation, unlike many high-speed op-amps that mandate minimum gain ≥6 dB. This enables direct use as a differential buffer without feedback resistors, reducing component count and layout complexity in ADC interface circuits.

How does the THS4511RGTT maintain output common-mode voltage accuracy?

The THS4511RGTT uses an internal common-mode control loop referenced to the CM pins. When CM pins are left floating, the device defaults to 2.5 V output common-mode. With CM biased between 1.25 V and 3.75 V, output common-mode follows within 5 mV typical offset. This active control ensures consistent ADC input common-mode despite supply or load variations - critical for DC-coupled precision systems.

Can the THS4511RGTT operate from supplies other than 5 V?

Yes - the THS4511RGTT operates over 3.75 V to 5.25 V. Quiescent current scales linearly with supply voltage (35.9–43.5 mA), and AC performance (bandwidth, slew rate, distortion) remains stable across this range. However, output swing and common-mode control range are supply-dependent; full 2.5 V default CM requires VS+ = 5 V and VS– = 0 V.

What thermal considerations apply to the THS4511RGTT RGT package?

The THS4511RGTT RGT package features an exposed thermal pad on the underside that must be soldered to a thermally conductive PCB plane. TI specifies θ_JC = 2.4°C/W; failure to connect the pad risks exceeding 125°C maximum junction temperature during continuous 2.3 W dissipation. Thermal vias under the pad are mandatory for reliable operation above 100 mW average power.

Does the THS4511RGTT support power-down in battery-powered applications?

Yes - the THS4511RGTT includes a dedicated PD pin that reduces quiescent current from 39.2 mA to 0.65 mA when pulled low. Turn-on delay is 55 ns, enabling rapid wake-up in burst-mode acquisition. The PD pin accepts logic-level control directly from microcontrollers without level-shifting, making it suitable for portable instrumentation and handheld medical devices.