Texas Instruments THS3201DBVR

Overview

THS3201DBVR from Texas Instruments is a 1.8-GHz current-feedback amplifier (CFA) optimized for high-speed, low-distortion signal conditioning. It delivers 6700 V/µs slew rate (G = 2, 10-V step), –78 dBc IMD3 at 20 MHz, 1.65 nV/√Hz input voltage noise, ±7.5 V supply operation, and 100 mA output drive-enabling precision arbitrary waveform generation and high-resolution ADC/DAC buffering in test equipment.

For engineers reviewing the THS3201DBVR datasheet, THS3201DBVR pinout, THS3201DBVR application, or THS3201DBVR equivalent, key selection criteria include its current-feedback architecture, SOT-23-5 package thermal limitations, ±3.3 V to ±7.5 V dual-supply range, and distortion performance at >10 MHz frequencies where voltage-feedback amplifiers degrade.

Technical Context

The THS3201DBVR employs a current-feedback topology with low-impedance inverting input (11 Ω) and high-impedance noninverting input (780 kΩ), enabling wide bandwidth independent of closed-loop gain. Its transimpedance gain is 300 kΩ at 25°C, and it maintains 0.1 dB flatness up to 380 MHz (G = 2, RL = 100 Ω).

Designed for ±7.5 V operation, it achieves 880 MHz large-signal bandwidth (2 Vpp), sub-nanosecond rise/fall times (0.7/0.9 ns), and 20 ns settling to 0.1%-critical for pulse fidelity in ATE and high-speed data acquisition systems.

Key Specifications

Pinout & Package

The THS3201DBVR is housed in a 5-pin SOT-23 package (DBV) with exposed pad not electrically connected. Thermal management requires PCB copper pour under the pad per TI SLMA002 guidelines to maintain junction temperature ≤125°C at full load.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS3201DBVR, THS3202DR provides dual-channel density at higher power, while OPA695IDBVR trades slew-rate linearity for DC accuracy-making THS3201DBVR optimal for pure wideband pulse fidelity in space-constrained SOT-23 layouts.

Availability

THS3201DBVR is available at Aetrix Electronics and suitable for arbitrary waveform generation, high-speed ADC/DAC interfacing, and automated test equipment requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for THS3201DBVR 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 THS3201DBVR belongs to TI's high-speed current-feedback amplifier product line, engineered specifically for test and measurement, ATE, and high-fidelity video signal conditioning where bandwidth, slew rate, and distortion performance outweigh DC precision requirements.

FAQ

What is the maximum recommended supply voltage for the THS3201DBVR?

The THS3201DBVR has an absolute maximum supply voltage rating of ±8.25 V, but TI specifies its recommended operating range as ±3.3 V to ±7.5 V. Operating at ±7.5 V delivers full AC performance including 1.8 GHz bandwidth and 6700 V/µs slew rate; exceeding ±7.5 V risks accelerated parametric drift and reduced reliability, especially in the SOT-23-5 DBV package where thermal dissipation is constrained.

Does the THS3201DBVR require external compensation for stability with capacitive loads?

Yes, the THS3201DBVR requires external isolation resistance (R_ISO) in series with capacitive loads >20 pF. For example, with 47 pF load, TI recommends 20 Ω R_ISO; with 100 pF, 15 Ω is advised. This compensates for the inverting-input zero introduced by load capacitance, preventing peaking and oscillation-critical for driving coaxial cables or ADC input capacitance without degradation of 0.1 dB flatness bandwidth.

How does the THS3201DBVR's current-feedback architecture differ from standard op-amps in layout practice?

Unlike voltage-feedback op-amps, the THS3201DBVR's low-impedance inverting input (11 Ω) demands tight matching of feedback resistor (RF) and gain-setting resistor (RG) values and short, symmetric PCB traces to minimize parasitic inductance. Layout must avoid ground-plane splits under the inverting node, and RF should be placed adjacent to the IN– pin-not the output-to preserve loop stability and prevent 100+ MHz ringing observed in poorly routed prototypes.

Can the THS3201DBVR drive a 50 Ω load with ±5 V output swing?

Yes, the THS3201DBVR delivers ±5.8 V output swing into 100 Ω and ±5.5 V into 100 Ω at 85°C, which translates to ±5 V into 50 Ω with appropriate gain configuration (e.g., G = 1, RF = 1.2 kΩ). However, output current must remain within 100 mA sourcing/sinking limits; at ±5 V into 50 Ω, current is 100 mA-operating at the absolute maximum, so thermal derating and proper PCB copper pour under the PowerPAD™ are mandatory for sustained operation.

Is the THS3201DBVR suitable for driving high-resolution ADCs like the ADS54J60?

Yes, the THS3201DBVR is explicitly cited in TI reference designs for driving 14-bit, 500 MSPS ADCs such as the ADS54J60. Its 1.65 nV/√Hz input voltage noise contributes less than 0.3 LSB of integrated noise in a 500 MHz Nyquist band, and its 880 MHz large-signal bandwidth ensures full-scale 2 Vpp steps settle within 20 ns to 0.1%, meeting the dynamic performance requirements of JESD204B-compliant data converters without additional filtering or gain staging.