Texas Instruments THS3062DGNR

Overview

THS3062DGNR from Texas Instruments is a dual-channel, high-voltage, current-feedback amplifier optimized for low-distortion, high-slew-rate signal conditioning. It delivers 7000 V/μs slew rate at ±15 V supply, 120 MHz 0.1-dB flat bandwidth (G = 2), –81 dBc 3rd harmonic distortion at 10 MHz, ±145 mA output drive into 50 Ω, and operates from ±5 V to ±15 V supplies. It is used in high-fidelity video line drivers and VDSL line driver circuits requiring large linear output swing.

For engineers reviewing the THS3062DGNR datasheet, THS3062DGNR pinout, THS3062DGNR application, or THS3062DGNR equivalent, key selection criteria include its current-feedback architecture enabling stable high-gain bandwidth scaling, PowerPAD-enhanced thermal performance in MSOP-8 package, and verified distortion performance under 150 Ω load conditions per TI SLOS394B Rev. November 2009.

Technical Context

The THS3062DGNR employs a BiCOM-I complementary bipolar process with dielectric isolation, supporting f_T > several GHz transistors. Its current-feedback topology decouples bandwidth from closed-loop gain via feedback resistor (R_f) selection-e.g., 560 Ω for G = 2, 357 Ω for G = 5-enabling 220 MHz –3 dB bandwidth at G = 10 while maintaining < 0.3 dB peaking in unity gain.

It features separate inverting (71 Ω) and noninverting (518 kΩ) input resistances, 2.6 nV/√Hz input voltage noise, and differential input voltage limit of ±3 V. The device requires external R_f/R_g networks for gain setting and exhibits 0.1 Ω closed-loop output impedance at 1 MHz, ensuring robust drive into reactive loads.

Key Specifications

Pinout & Package

The THS3062DGNR is housed in an 8-pin MSOP package with PowerPAD™ thermally enhanced bottom pad (DGN). The PowerPAD must be soldered to a PCB copper plane for thermal management; it is electrically isolated from all pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed current-feedback amplifier applications.

Compared with THS3062DR, THS3062DGNR provides 65% lower thermal resistance enabling full 145 mA output at elevated temperature; versus THS3122DGNR, it delivers 12 dB better HD3 at 10 MHz while consuming 35% less quiescent power per channel.

Availability

THS3062DGNR is available at Aetrix Electronics and suitable for video line driver, VDSL2 line driver, high-voltage ADC preamplifier, and test & measurement signal generator applications requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for THS3062DGNR 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 company founded in 1930, specializing in analog, embedded processing, and high-performance analog ICs for industrial, automotive, and communications markets.

The THS306x product line was designed specifically for high-fidelity, high-slew-rate signal conditioning in broadband communication and video infrastructure-emphasizing distortion performance, thermal robustness, and current-feedback scalability.

FAQ

What is the maximum safe operating voltage for THS3062DGNR?

The THS3062DGNR has an absolute maximum supply voltage rating of ±16.5 V per rail. Operation beyond this risks permanent damage. For reliable long-term use, TI specifies ±15 V as the recommended maximum operating voltage. At ±15 V, the device delivers full 7000 V/μs slew rate and ±145 mA output drive while maintaining < 0.3 dB peaking in unity gain. Always observe derating curves in the datasheet for elevated temperature operation.

How does THS3062DGNR achieve low harmonic distortion at 10 MHz?

The THS3062DGNR achieves –81 dBc 3rd harmonic distortion at 10 MHz through its BiCOM-I bipolar process, which provides high f_T transistors and low intrinsic distortion, combined with precise current-feedback architecture that minimizes loop gain degradation at high frequencies. Verified under G = 2, R_L = 150 Ω, and V_O = 2 V_{PP, this performance enables compliance with NTSC/PAL and VDSL2 spectral masks. Layout practices-including symmetric routing, ground plane under PowerPAD, and tight feedback resistor placement-are critical to replicate this result.}

Can THS3062DGNR drive a 75 Ω video load directly?

Yes, THS3062DGNR can drive a 75 Ω video load directly with full performance. At ±15 V supply, it delivers ±13 V output swing into 150 Ω and ±13.7 V into 1 kΩ; extrapolating, it sustains > ±12 V into 75 Ω. Its 0.02% differential gain and 0.01° differential phase error at 10 MHz meet SMPTE 253M standards for broadcast video. Use 75 Ω series termination at the output and maintain controlled-impedance PCB traces to prevent reflections.

What is the role of the PowerPAD in THS3062DGNR?

The PowerPAD in THS3062DGNR is an electrically isolated copper thermal pad on the underside of the MSOP-8 package. It reduces thermal resistance (θ_JA = 58.4°C/W) by conducting heat directly into the PCB's internal copper planes. To function correctly, the PowerPAD must be soldered to a dedicated thermal land connected to ≥2 oz. copper pour; failure to do so causes junction temperature to exceed 125°C under full load, degrading distortion and potentially causing thermal shutdown. TI technical brief SLMA002 details implementation.

Why does THS3062DGNR require different feedback resistors for different gains?

THS3062DGNR uses a current-feedback architecture where bandwidth is inversely proportional to feedback resistor (R_f) value-not closed-loop gain. To maintain optimal bandwidth and phase margin across gains, R_f must scale down as gain increases: 750 Ω for G = 1, 560 Ω for G = 2, 357 Ω for G = 5, and 200 Ω for G = 10. This preserves >220 MHz –3 dB bandwidth at G = 10 while keeping peaking < 0.3 dB. Using fixed R_f degrades stability and increases distortion.