Texas Instruments THS4041IDGN

Overview

THS4041IDGN from Texas Instruments is a single-channel, voltage-feedback operational amplifier optimized for high-speed, unity-gain-stable operation with any capacitive load. It delivers 165 MHz small-signal bandwidth (±15 V, CL = 0 pF), 400 V/µs slew rate, and drives ±100 mA into 20 Ω while maintaining 0.01% differential gain and 0.01° differential phase error in video applications.

For engineers reviewing the THS4041IDGN datasheet, THS4041IDGN pinout, THS4041IDGN application, or THS4041IDGN equivalent, this amplifier is selected for precision high-frequency signal buffering, ADC driver stages, and broadcast-quality video line driving where stability under variable capacitive loads and low distortion are critical.

Technical Context

The THS4041IDGN uses a dielectrically isolated complementary bipolar process enabling GHz f_T transistors, supporting wide bandwidth and fast settling (120 ns to 0.1%, 250 ns to 0.01%). Its internal C-stable compensation dynamically adjusts dominant-pole response based on sensed output capacitance, preserving stability without external components across 0–1000 pF loads.

It operates from dual supplies (±4.5 V to ±16.5 V) or single supply (9–33 V), features rail-to-rail input common-mode range (±14.3 V at ±15 V), and maintains low THD (−75 dBc at 1 MHz, RL = 150 Ω) and high open-loop gain (74–80 dB) over full temperature range (−40°C to +85°C).

Key Specifications

Pinout & Package

THS4041IDGN is housed in an 8-pin MSOP PowerPAD™ package (DGN), featuring thermal-enhanced copper pad for improved power dissipation (θ_JA = 58.4°C/W). The exposed pad must be soldered to PCB ground plane for optimal thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4041IDGN, THS4031CDGN trades bandwidth and load stability for lower noise, while THS4081IDGN increases bandwidth and cuts power but sacrifices output current-making THS4041IDGN the only choice for high-current, C-stable video and ADC driver roles.

Availability

THS4041IDGN is available at Aetrix Electronics and suitable for video distribution systems, high-speed data acquisition, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for THS4041IDGN 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 connectivity technologies, with decades of expertise in high-performance op-amps and signal chain solutions.

The THS4041 forms part of TI's C-stable high-speed op-amp family, designed specifically for applications demanding unconditional stability into unknown or variable capacitive loads-especially broadcast video, instrumentation, and high-fidelity data conversion.

FAQ

What is the maximum capacitive load the THS4041IDGN can drive without external compensation?

The THS4041IDGN is internally compensated to remain stable with capacitive loads up to 1000 pF without external components. At 1000 pF, it exhibits controlled peaking (<3 dB) but no oscillation. For loads >100 pF, adding a 20–75 Ω series isolation resistor at the output further suppresses peaking and improves transient response. This behavior is confirmed in Figure 24 and the "Driving a Capacitive Load" section of the THS4041IDGN datasheet.

Does the THS4041IDGN support single-supply operation?

Yes, the THS4041IDGN supports single-supply operation from 9 V to 33 V. Its input common-mode range extends to within 1.2 V of the negative rail (e.g., 0 V at 9-V supply), and output swing reaches ±3.5 V into 1 kΩ with a 9-V supply. This enables use in ground-referenced sensor interfaces and portable equipment where dual supplies are impractical.

How does the THS4041IDGN's PowerPAD package affect thermal performance?

The THS4041IDGN's MSOP PowerPAD (DGN) package features an exposed thermal pad that, when soldered to a PCB ground plane, reduces θ_JA to 58.4°C/W-more than 2.8× better than the standard SOIC (D) package (θ_JA = 167°C/W). This allows 2.14 W continuous power dissipation at TA = 25°C, critical for sustained high-output-current operation in compact industrial layouts.

Can the THS4041IDGN replace the THS4041CDGN in existing designs?

Yes-the THS4041IDGN is a direct drop-in replacement for the THS4041CDGN in terms of pinout, footprint, and electrical specifications, differing only in temperature grade (−40°C to +85°C vs. 0°C to +70°C) and minor parameter shifts (e.g., input offset max increases from 10 mV to 13 mV). No PCB or schematic changes are required for upgrade to extended temperature operation.

What is the purpose of Pins 1 and 8 (NULL) on the THS4041IDGN?

Pins 1 and 8 on the THS4041IDGN are dedicated offset null terminals. A 10-kΩ potentiometer is connected between them, with its wiper tied to VCC−, allowing manual adjustment of input offset voltage to <1 mV. This feature is unique to the THS4041 (single version); the dual THS4042 omits these pins. It is used in precision DC-coupled applications like medical instrumentation where residual offset must be minimized.