Texas Instruments THS4141IDGN

Overview

THS4141IDGN from Texas Instruments is a high-speed fully differential amplifier in an 8-pin MSOP PowerPAD™ package, delivering 160 MHz –3 dB bandwidth (±15 V supply), 450 V/µs slew rate, and –79 dB third-harmonic distortion at 1 MHz. It functions as a precision differential ADC driver in data acquisition systems requiring low noise (6.5 nV/√Hz) and balanced output common-mode rejection.

For engineers reviewing the THS4141IDGN datasheet, THS4141IDGN pinout, THS4141IDGN application, or THS4141IDGN equivalent, key selection criteria include differential input/output architecture, VOCM-controlled output level shifting, thermal management via PowerPAD™, and compatibility with ±2.5 V to ±15 V or 5 V single-supply operation.

Technical Context

The THS4141IDGN implements a true fully differential signal path from input to output using TI's BiComI complementary bipolar process, enabling inherent common-mode noise rejection and reduced second-harmonic distortion through symmetrical output cancellation. Its VOCM pin sets the DC common-mode level of both outputs independently of gain configuration.

Unlike standard op-amps, it operates as two matched inverting amplifiers sharing a common feedback network, supporting both differential-input/differential-output and single-ended-input/differential-output modes. Gain is set by external resistor ratios (e.g., Rf/Rg), with recommended values including 390 Ω/390 Ω for unity gain, and requires matched resistors (≤1%) to preserve CMRR and PSRR performance.

Key Specifications

Pinout & Package

The THS4141IDGN uses an 8-pin MSOP PowerPAD™ (DGN) package with exposed thermal pad on underside, requiring soldering to a PCB copper pour for thermal dissipation 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 THS4131IDGN and THS4561IRGET, the THS4141IDGN uniquely balances 160 MHz bandwidth, –79 dB THD, and ±15 V supply compatibility - making it the most suitable choice for industrial and test equipment where wide dynamic range, robust power handling, and proven reliability across temperature are prioritized.

Availability

THS4141IDGN is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging front-ends, and industrial sensor signal chains requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for THS4141IDGN 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 amplifier design and manufacturing.

The THS414x family was engineered specifically for demanding differential signal conditioning tasks - including ADC driving, antialias filtering, and high-fidelity communications - where bandwidth, linearity, and thermal stability are critical.

FAQ

What is the function of the VOCM pin on the THS4141IDGN?

The VOCM pin on the THS4141IDGN sets the DC common-mode voltage of both differential outputs. When left unconnected, it defaults to midrail (e.g., VCC/2 in single-supply mode). For optimal noise immunity, TI recommends bypassing VOCM with a 0.1 µF capacitor to ground. This feature allows precise alignment of THS4141IDGN output levels to match the reference voltage of downstream differential ADCs without additional level-shifting circuitry.

Does the THS4141IDGN support single-supply operation?

Yes, the THS4141IDGN supports 5 V single-supply operation with VCC− tied to ground. In this configuration, VOCM defaults to 2.5 V, and the input common-mode range extends from –4 V to +4.5 V (relative to ground). Output swing reaches 1.2–3.8 V under these conditions. The device maintains –78 dB THD at 1 MHz and 150 MHz bandwidth, making THS4141IDGN viable for portable and low-voltage instrumentation designs.

How does the PowerPAD™ package affect thermal design for the THS4141IDGN?

The THS4141IDGN's DGN package incorporates an exposed thermal pad that must be soldered to a PCB copper pour to achieve its rated θJA of 58.4°C/W. Without proper thermal connection, junction temperature can exceed 125°C under load, degrading THD and reliability. TI technical briefs SLMA002 and SLMA004 specify minimum copper area (≥250 mm²), thermal vias (≥6 × 0.3 mm), and solder mask clearance - all essential to sustain 1.71 W dissipation and ensure long-term stability of THS4141IDGN performance.

Can the THS4141IDGN drive capacitive loads directly?

No - the THS4141IDGN is internally compensated for maximum bandwidth and slew rate, making it sensitive to capacitive loading. For loads >10 pF, TI mandates a series resistor (≥20 Ω) between each output and the load to preserve phase margin and prevent ringing or oscillation. In 50 Ω systems, a 50 Ω series resistor provides both isolation and source-end impedance matching. This requirement applies universally across all operating conditions and must be implemented to guarantee stable THS4141IDGN operation.

What is the significance of the NC pin (Pin 6) on the THS4141IDGN?

Pin 6 on the THS4141IDGN is a no-connect (NC) terminal - it is not bonded to the die and serves no electrical function. TI explicitly states this pin must remain unconnected; routing traces to it, grounding it, or applying voltage will compromise THS4141IDGN performance and may violate absolute maximum ratings. Layout guidelines require keeping this pin isolated from all conductive elements, including ground planes and thermal pads, to prevent parasitic coupling or unintended current paths affecting VOCM accuracy or output balance.