Texas Instruments BUF602ID

Overview

BUF602ID from Texas Instruments is a high-speed, closed-loop buffer IC designed for AC-coupled, single-supply signal conditioning in wideband analog systems. It delivers 1000MHz bandwidth (±5V), 8000V/µs slew rate, ±60mA continuous output current, and integrated mid-supply reference buffering - enabling low-component-count video, clock distribution, and test equipment front-ends.

For engineers reviewing the BUF602ID datasheet, BUF602ID pinout, BUF602ID application, or BUF602ID equivalent, this page provides verified package mapping (SO-8), confirmed SO-8 pinout with NC terminals, real-world gain flatness (240MHz @ 0.1dB), differential phase (0.04° NTSC), and validated alternatives for high-frequency buffer replacement.

Technical Context

The BUF602ID operates as a unity-gain, closed-loop buffer with self-referenced AC-coupling architecture. Its internal 50kΩ–50kΩ resistor divider generates a stable VREF at VS/2, buffered by a dedicated low-impedance (200Ω) output stage that supports up to 800µA sourcing current.

It features dual-supply (±1.4V to ±6.3V) or single-supply (+2.8V to +12.6V) operation, with input common-mode range extending to ±VS and output swing within 1.0V of either rail. The SO-8 package includes two no-connect (NC) pins (pins 6 and 7), preserving standard buffer pinout compatibility while isolating unused internal nodes.

Key Specifications

Pinout & Package

BUF602ID is packaged in an SO-8 surface-mount package (package code D, thermal resistance θ_JA = 125°C/W). Pin 1 is marked with a dot; pin numbering follows standard SO-8 orientation (counterclockwise from top-left).

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS3201DR and LMH6702MA, BUF602ID uniquely integrates a low-impedance mid-supply reference in a standard SO-8 pinout - reducing system-level BOM, layout complexity, and power consumption in AC-coupled video, clock, and instrumentation designs.

Availability

BUF602ID is available at Aetrix Electronics and suitable for video signal routing, clock distribution, and high-speed data acquisition requiring stable component supply, long-term industrial lifecycle support, and traceable sourcing from authorized channels.

Supply support for BUF602ID 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 over 90 years of innovation in precision amplifiers and high-speed signal chain solutions.

The BUF602ID belongs to TI's high-speed buffer product line, engineered specifically for wideband AC-coupled signal conditioning in broadcast, test, and communications infrastructure where low distortion, fast settling, and integrated biasing are critical.

FAQ

What supply voltages does the BUF602ID support?

The BUF602ID supports dual supplies from ±1.4V to ±6.3V and single supplies from +2.8V to +12.6V. At +5V single supply, it delivers 780MHz bandwidth and 2500V/µs slew rate. Operation below +2.8V is not specified; minimum operating voltage is strictly +2.8V for single-supply mode. The BUF602ID datasheet confirms these ranges under Absolute Maximum Ratings and Electrical Characteristics tables.

Does the BUF602ID require external components for AC-coupled operation?

No - the BUF602ID integrates a mid-supply reference buffer (pins 3 and 8) that provides a stable VS/2 voltage with 200Ω output impedance. Only a 0.1µF bypass capacitor to ground on VREF is required. This eliminates external resistive dividers and op-amp buffers, reducing component count by up to four parts in typical AC-coupled video or clock buffer designs using BUF602ID.

What is the maximum load capacitance the BUF602ID can drive stably?

The BUF602ID remains stable driving up to 100pF capacitive load with ≤0.5dB peaking, per Figure 17 in the official datasheet. For loads >100pF, a series 20Ω resistor at the output is recommended to maintain phase margin. This capability enables direct connection to ADC inputs, long PCB traces, or multiple fan-out nodes without added isolation stages in BUF602ID-based designs.

How does the BUF602ID handle thermal dissipation in SO-8 package?

The BUF602ID in SO-8 (package code D) has a junction-to-ambient thermal resistance (θ_JA) of 125°C/W. With 5.8mA quiescent current at ±5V, static power dissipation is ~58mW. Under full ±3V/60mA output swing into 50Ω, total power approaches 360mW - well within the 1W Safe Operating Area limit. Layout with ≥2 cm² copper pour under the exposed pad (if present) or adjacent thermal vias improves reliability in continuous high-drive applications using BUF602ID.

Can the BUF602ID replace older high-speed buffers like the THS3001?

Yes - the BUF602ID offers superior bandwidth (1000MHz vs. 420MHz), higher slew rate (8000V/µs vs. 3100V/µs), and integrated VREF not present in THS3001. However, THS3001 uses different pinout (no NC pins, VREF absent), so PCB redesign is required. BUF602ID is not pin-compatible with THS3001, but serves as a functional upgrade in new designs where its AC-coupled architecture and SO-8 footprint simplify implementation.