Texas Instruments THS4141CDR

Overview

THS4141CDR 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 supply), 450 V/µs slew rate, –79 dB third-harmonic distortion at 1 MHz, and 6.5 nV/√Hz input-referred voltage noise - enabling high-fidelity signal conditioning in data acquisition systems.

For engineers reviewing the THS4141CDR datasheet, THS4141CDR pinout, THS4141CDR application, or THS4141CDR equivalent, key selection criteria include differential output swing (±12.9 V at ±15 V), VOCM-controlled common-mode level setting, MSOP PowerPAD™ thermal performance, and compatibility with 800 Ω differential loads in high-resolution ADC front-ends.

Technical Context

The THS4141CDR implements a true fully differential signal path from input to output using TI's BiComI complementary bipolar process, ensuring balanced gain and phase matching between VOUT+ and VOUT−. Its internal architecture supports precise differential output common-mode control via the VOCM pin, which directly sets the midpoint of both outputs without affecting differential gain.

Unlike conventional op-amps, it rejects common-mode noise at both input and output stages while reducing second-harmonic distortion through symmetrical output cancellation. The device operates across a wide supply range (5 V single or ±2.5 V to ±15 V dual) and maintains >75 dB CMRR over frequency up to 10 MHz.

Key Specifications

Pinout & Package

The THS4141CDR is housed in an 8-pin MSOP PowerPAD™ package (DGN), featuring an exposed thermal pad on the underside for enhanced heat dissipation. This thermally optimized construction supports continuous operation at elevated ambient temperatures when soldered to a PCB copper pour.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4131CDGNR and THS4561IRGET, the THS4141CDR offers the best balance of 160 MHz bandwidth, –79 dB THD, and integrated VOCM control - making it uniquely suitable for high-fidelity, medium-speed data converter interfaces without external bias complexity.

Availability

THS4141CDR is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging front-ends, and industrial sensor signal conditioning requiring stable component supply and long-term production continuity.

Supply support for THS4141CDR 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.

The THS4141CDR belongs to TI's High-Speed Fully Differential I/O Amplifier family, engineered specifically for precision differential signal conditioning in data converter interfaces, antialiasing filtering, and high-fidelity communications infrastructure.

FAQ

What is the maximum differential output voltage swing of the THS4141CDR?

The THS4141CDR delivers ±12.9 V differential output swing into 800 Ω load when operated at ±15 V supply, and ±3.9 V at 5 V single supply. This swing is measured differentially between VOUT+ and VOUT−, and remains linear within 0.1% settling specifications. The actual usable swing depends on load impedance and supply headroom - for example, at ±5 V supply, the guaranteed minimum is ±3.6 V.

How does the VOCM pin function in the THS4141CDR?

The VOCM pin in the THS4141CDR sets the common-mode voltage of both differential outputs (VOUT+ and VOUT−). When left unconnected, it defaults to midrail (VCC/2); applying an external voltage directly establishes the output DC bias point. A 0.1 µF bypass capacitor is mandatory at this pin to suppress noise coupling. In THS4141CDR circuits driving ADCs, VOCM is typically tied to the ADC's reference voltage (VREF) to ensure level alignment.

Can the THS4141CDR operate from a single 5-V supply?

Yes, the THS4141CDR supports single 5-V operation with full functionality. In this configuration, VOCM defaults to 2.5 V, and the differential output swing is specified as ±3.9 V (i.e., 7.8 VPP) into 800 Ω. Input common-mode range extends from –4 V to +4.5 V, allowing direct interfacing with ground-referenced sources. However, THS4141CDR performance metrics like bandwidth (150 MHz) and THD (–78 dB) are slightly reduced versus ±15 V operation.

What thermal considerations apply to the THS4141CDR in MSOP PowerPAD™ package?

The THS4141CDR in DGN package features an exposed thermal pad requiring solder connection to a PCB copper pour for effective heat dissipation. With proper thermal vias and copper area, its junction-to-ambient thermal resistance (θJA) drops to 58.4°C/W, enabling 1.71 W power dissipation at 25°C ambient. Failure to solder the thermal pad risks exceeding the 125°C maximum continuous junction temperature, degrading distortion performance and long-term reliability.

Is the THS4141CDR pin-compatible with the THS4140CDR?

No, the THS4141CDR is not pin-compatible with the THS4140CDR. While both share identical pinouts in DGN/DGK/D packages, the THS4140CDR includes a dedicated PD (power-down) pin at position 6, whereas THS4141CDR has NC (no connect) at that location. Substituting THS4141CDR for THS4140CDR removes shutdown capability; substituting THS4140CDR for THS4141CDR introduces an unintended control node that must be pulled to VCC− to avoid malfunction.