Texas Instruments THS4141IDGNR

Overview

THS4141IDGNR from Texas Instruments is a high-speed fully differential amplifier optimized for single-ended-to-differential conversion and precision ADC driving. It delivers 160 MHz –3 dB bandwidth (±15 V), 450 V/µs slew rate, –79 dB third-harmonic distortion at 1 MHz, 6.5 nV/√Hz input noise, and operates from ±2.5 V to ±15 V supplies. It is used in high-fidelity data acquisition systems where balanced signal integrity and low distortion are critical.

For engineers reviewing the THS4141IDGNR datasheet, THS4141IDGNR pinout, THS4141IDGNR application, or THS4141IDGNR equivalent, key selection criteria include differential output swing (±12.9 V at ±15 V), VOCM-controlled common-mode level, MSOP PowerPAD™ thermal performance, and compatibility with 16-bit+ SAR and sigma-delta ADCs requiring >90 dB SFDR.

Technical Context

The THS4141IDGNR implements a true fully differential signal path-differential input to differential output-with symmetrical internal topology that inherently rejects common-mode noise and cancels second-harmonic distortion. Its BiComI bipolar process enables high slew rate and wide bandwidth while maintaining low input-referred noise.

It features an externally controllable VOCM pin that sets the DC common-mode level of both outputs independently of gain configuration, enabling seamless interfacing with ADC reference voltages. Unlike the THS4140, it lacks a shutdown (PD) pin-confirmed by pinout comparison and absence of PD terminal in THS4141-specific diagrams and electrical tables.

Key Specifications

Pinout & Package

THS4141IDGNR uses the MSOP-8 PowerPAD™ package (DGN), featuring an exposed thermal pad on the underside for direct PCB copper connection. This construction reduces θ_JA to 58.4°C/W and enables 1.71 W power dissipation at 25°C ambient-critical for sustained high-output-swing operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4141IDGNR, THS4131IDGNR trades 10 MHz bandwidth and 400 V/µs slew rate for 5.2 nV/√Hz lower noise-ideal for DC- to 100 MHz precision digitization. THS4561IRGET offers 11× higher bandwidth and on-chip resistors but demands QFN rework and increases layout complexity.

Availability

THS4141IDGNR is available at Aetrix Electronics and suitable for high-speed data acquisition, communications infrastructure, medical imaging, and industrial sensor interface applications requiring stable component supply across extended temperature ranges (–40°C to 85°C).

Supply support for THS4141IDGNR 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 data converter interfaces.

The THS414x family was designed specifically for high-fidelity differential signal conditioning in precision ADC driver, antialiasing filter, and high-speed communication applications-emphasizing distortion suppression, thermal stability, and supply flexibility.

FAQ

What is the function of the VOCM pin on the THS4141IDGNR?

The VOCM pin on the THS4141IDGNR sets the DC common-mode voltage level of both differential outputs (VOUT+ and VOUT−). It accepts an external voltage (e.g., ADC reference or mid-rail) and directly biases the output stage-enabling seamless interfacing with ADCs having varying input common-mode requirements. The THS4141IDGNR does not internally generate VOCM; it must be driven externally, typically with a low-impedance source and 0.1 µF bypass capacitor for stability.

Does the THS4141IDGNR support power-down functionality?

No, the THS4141IDGNR does not include a power-down (PD) pin. Unlike the THS4140, which features a dedicated PD terminal (pin 6 in D/DGN/DGK packages), the THS4141IDGNR has NC (no connect) at pin 6 and omits shutdown circuitry entirely. This is confirmed by the absence of ICC(SD) specifications, PD-related timing diagrams, and functional descriptions in the THS4141-specific sections of the SLOS320F datasheet.

What is the maximum differential output voltage swing for THS4141IDGNR at ±15 V supply?

At ±15 V supply, the THS4141IDGNR delivers a differential output voltage swing of ±12.9 V (25.8 V_PP) under typical conditions with 800 Ω load. This corresponds to a single-ended swing of ±12.9 V on each output relative to VOCM, enabling full utilization of 16-bit ADC input ranges without clipping. The datasheet specifies ±12 V minimum and ±12.9 V typical at TA = 25°C, with ±11 V minimum across the full –40°C to 85°C operating range.

Can THS4141IDGNR operate from a single 5 V supply?

Yes, the THS4141IDGNR supports single-supply operation from 5 V (VCC = 5 V, VCC− = GND). In this configuration, VOCM defaults to VCC/2 = 2.5 V, establishing the output common-mode level. Input common-mode range is –4 V to 4.5 V, allowing rail-to-rail input capability when referenced to GND. Output swing is 1.2 V to 3.8 V (single-ended) or 2.4 V_PP differential-sufficient for driving 12-bit ADCs with 2.5 V references.

Why is the NC pin (pin 6) on THS4141IDGNR required to remain unconnected?

Pin 6 on the THS4141IDGNR is explicitly designated NC (no connect) in the datasheet and has no internal connection to the die. Connecting it to any potential-including GND, VCC, or VOCM-can introduce parasitic capacitance, leakage paths, or unintended coupling that degrades CMRR, increases distortion, or causes instability. The THS4141IDGNR pinout differs from THS4140 (which uses pin 6 for PD), making correct identification essential; misrouting this pin invalidates THS4141IDGNR's specified AC performance.