Texas Instruments THS3001CD

Overview

THS3001CD from Texas Instruments is a high-speed current-feedback operational amplifier designed for large-signal, wideband analog signal conditioning in communication infrastructure and video systems. It delivers 420MHz small-signal bandwidth (G = 1), 6500V/μs slew rate at ±15V supply, 40ns settling time to 0.1%, ≤3mV input offset voltage, and –96dBc THD at 1MHz - enabling ultra-fast ADC/DAC buffering and baseband signal reconstruction.

For engineers reviewing the THS3001CD datasheet, THS3001CD pinout, THS3001CD application, or THS3001CD equivalent, key selection criteria include current-feedback architecture advantages over voltage-feedback op-amps, feedback-resistor–dependent bandwidth tuning, thermal performance under ±15V operation, and compatibility with 150Ω video loads requiring <0.02° differential phase error.

Technical Context

The THS3001CD implements a dielectrically isolated complementary bipolar (HVBiCOM) process with GHz f_T NPN/PNP transistors, enabling its current-feedback topology. Its bandwidth is inversely proportional to feedback resistor value (e.g., 420MHz at R_F = 680Ω, G = 2, ±15V), not closed-loop gain - allowing independent gain and bandwidth adjustment via R_G and R_F.

It operates in single-supply (9–32V) or dual-supply (±4.5V to ±16V) modes with rail-to-rail output swing up to ±12.8V into 1kΩ at ±15V. Input stage features 15Ω inverting input resistance and 1.5MΩ noninverting input resistance, supporting stable termination in high-frequency PCB layouts with minimal peaking.

Key Specifications

Pinout & Package

THS3001CD is packaged in an 8-pin SOIC (D package), 4.9mm × 6mm body size, with exposed pad not present. Pin functions are validated per TI SLOS217I Rev. December 2024.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS3001CD, THS3091DR trades 250V/μs slew margin for 70MHz bandwidth uplift - advantageous in narrowband IF filtering but inferior for wide-pulse fidelity. LMH6723MA/NOPB offers lower cost and power but lacks ±15V support and video-grade AC specs, limiting use to non-critical video and mid-speed data paths.

Availability

THS3001CD is available at Aetrix Electronics and suitable for wireless infrastructure, broadcast video, high-speed data acquisition, and RF instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for THS3001CD 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 signal chain solutions.

The THS3001CD belongs to TI's high-speed current-feedback op-amp product line, engineered specifically for demanding wideband applications including communications infrastructure, medical imaging, and professional video systems where speed, linearity, and settling accuracy are critical.

FAQ

What is the maximum recommended feedback resistor value for stable operation of the THS3001CD?

The THS3001CD achieves optimal phase margin and bandwidth stability with a 1kΩ feedback resistor at G = 1 and ±15V supply. Increasing R_F beyond 1kΩ reduces bandwidth and degrades phase margin - TI's datasheet specifies 680Ω for G = 2 and ±15V to maintain 385MHz bandwidth and avoid peaking. Using >1kΩ resistors risks oscillation in high-gain configurations.

Can the THS3001CD operate from a single 24V supply, and what are the output swing limitations?

Yes, the THS3001CD supports single-supply operation from 9V to 32V. At 24V (V_CC+ = 24V, V_CC– = 0V), the output swing is limited to approximately 1.5V above ground and 1.8V below V_CC+ into 1kΩ, per Figure 5-1. For rail-to-rail output, a split supply (e.g., ±12V) is preferred - delivering ±12.1V swing into 150Ω at ±15V, confirmed in Section 5.5.

How does the THS3001CD's current-feedback architecture affect PCB layout versus a voltage-feedback op-amp?

The THS3001CD's low-impedance inverting input (15Ω) demands short, direct traces to the feedback resistor and load, minimizing parasitic inductance that causes peaking. Unlike voltage-feedback op-amps, the noninverting input (1.5MΩ) is high-Z and requires guarding. TI recommends placing R_F and R_G adjacent to the IC, with ground plane clearance under the inverting node - layout deviations directly impact bandwidth flatness and stability.

Is the THS3001CD suitable for driving ADC inputs, and what input impedance considerations apply?

Yes, the THS3001CD is widely used to drive high-speed ADCs such as the ADS54J60. Its 15Ω inverting input impedance enables precise termination matching to 50Ω source impedances, reducing reflections. When configured as a unity-gain inverter, it provides low-output-impedance drive (<10Ω at 5MHz) and 40ns settling - critical for maintaining SFDR >75dBFS in 16-bit, 100MSPS converters.

What thermal derating applies to the THS3001CD in SOIC-8 package at full output current?

In SOIC-8 (D package), the THS3001CD has R_θJA = 97.5°C/W. At ±15V and 100mA continuous output into 150Ω, power dissipation reaches ~1.5W - raising junction temperature by ~146°C above ambient. To stay below the 125°C continuous-reliability limit, ambient must remain ≤–21°C unless forced-air cooling or board-level copper pours reduce effective θ_JA. Derate output current above 70°C ambient per Section 5.4.