OPA650U - 560 MHz Low-Power Voltage Feedback Op Amp | TI
Référence : OPA650U ✗ Fin de vieOPA650U Présentation
An operational amplifier is an analog integrated circuit that amplifies the voltage difference between its inverting and non-inverting inputs while using negative feedback to set the closed-loop gain. The OPA650U belongs to the voltage-feedback operational amplifier family within the broader amplifier and signal-conditioning IC hierarchy. Unlike a current-feedback amplifier, its gain-bandwidth and stability behavior depend on the applied noise gain and feedback network.
Key features include a 560 MHz unity-gain bandwidth, 50 mW power dissipation, low harmonic distortion characterized at 5 MHz, fast settling to 0.01%, and input bias current of 5 µA. The unity-gain-stable configuration allows it to operate directly as a buffer without requiring a higher minimum gain. Its wide bandwidth makes it suitable for fast instrumentation, low-level signal conditioning, test equipment, and communications signal paths.
OPA650U uses a voltage-feedback architecture and is available in the 8-SOIC package identified by distributor listings as a single, wideband voltage-feedback amplifier. The verified sources describe it as the OPA650 family device for wideband, low-power operation. Exact supply-voltage limits, input and output swing, offset voltage, slew rate, noise density, operating-temperature range, and short-circuit behavior were not included in the retrieved data and must be confirmed in the manufacturer datasheet before design release.
Typical uses include high-speed buffer stages, instrumentation front ends, active analog filters, waveform conditioning, communications equipment, laboratory instruments, and data-acquisition systems. When operating at high closed-loop gain, engineers should evaluate noise gain, phase margin, stability, output drive, and component tolerances rather than relying only on the 560 MHz unity-gain figure.
The primary design considerations are supply bypassing, feedback-loop stability, output loading, and thermal management. Place the specified input and output network components close to the device, preserve the manufacturer-recommended layout, and avoid long high-impedance traces around the amplifier. A small-signal bandwidth number does not guarantee large-signal settling, and the 50 mW power figure should not be interpreted as a substitute for checking output-current and supply-limit constraints.
This page combines the verified manufacturer-family description, distributor availability information, an obsolete-status report, and package-level cross-reference information. It also separates documented facts from unavailable parameters, highlights engineering checks that are absent from basic distributor summaries, and identifies where a true drop-in replacement requires additional validation.
Alternatives de remplacement direct pour OPA650U — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesOPA650U Valeurs maximales et caractéristiques électriques
| Amplifier Type | Voltage-feedback operational amplifier |
| Number of Circuits | 1 circuit |
| Unity-Gain Bandwidth | 560 MHz |
| Power Consumption | 50 mW |
| Input Bias Current | 5 µA |
| Harmonic Distortion Characterization Frequency | 5 MHz |
| Settling Accuracy | 0.01% |
| Gain Stability | Unity-gain stable |
| Boîtier | 8-pin SOIC |
| Type de montage | Surface mount |
| Datasheet Length | 13 pages |
| Statut RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
Guide de configuration des broches du OPA650U 8-pin soic
Configuration des broches du OPA650U (boîtier 8-pin soic). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour OPA650U.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
OPA650U convient pour 6 applications: High-Speed Instrumentation Signal Conditioning, Communications Signal Conditioning, Active Filter and Frequency-Shaping, Data-Acquisition Buffering, Laboratory and Test Equipment, Video and Fast Analog Waveform Conditioning.
High-Speed Instrumentation Signal Conditioning
OPA650U fits wideband instrumentation front ends that need to amplify small sensor or source signals without relying on a low-frequency precision amplifier. Its 560 MHz unity-gain bandwidth provides substantial small-signal bandwidth, while the 5 µA input bias current is useful when the source impedance cannot support much loading. The amplifier is normally placed in a closed-loop gain stage using resistive feedback. Designers must verify input common-mode range, output swing, noise, and stability for the actual gain and source impedance because those values were not included in the retrieved excerpts.
Recommandé
Communications Signal Conditioning
OPA650U can be evaluated for communications and data-acquisition signal paths that require wider bandwidth than general-purpose amplifiers provide. The 560 MHz unity-gain bandwidth and unity-gain stability allow it to buffer or condition signals without forcing a higher minimum closed-loop gain. In a communications design, it may precede an ADC, comparator, or mixer input, depending on amplitude and common-mode requirements. The engineer must still confirm supply range, output drive, noise density, and behavior at the selected closed-loop gain using the manufacturer datasheet.
Recommandé
Active Filter and Frequency-Shaping
OPA650U is a candidate for active filters and frequency-shaping networks requiring high closed-loop bandwidth. Its 560 MHz unity-gain bandwidth and unity-gain-stable architecture are useful when a low-noise-gain filter must preserve high-frequency behavior. The actual usable bandwidth is governed by the resistor, capacitor, topology, and closed-loop gain rather than by the amplifier headline figure alone. Confirm phase margin, output loading, component tolerances, and the maximum signal amplitude before production, and include an analysis of parasitic capacitance and PCB trace effects.
Recommandé
Data-Acquisition Buffering
OPA650U may be used as the high-speed buffer immediately preceding an ADC or sampling system when the source requires low input bias current and greater bandwidth than a conventional precision op amp. The 5 µA input bias current can reduce source loading, and the 560 MHz unity-gain bandwidth can support signal paths with demanding rise times. Its suitability remains conditional on input range, output swing, slew rate, noise, and acquisition timing. Place the device close to the ADC and validate settling against the converter's acquisition window.
Recommandé
Laboratory and Test Equipment
OPA650U is suitable for consideration in laboratory instruments and test fixtures that generate, buffer, or measure signals over a broad frequency range. Its unity-gain stability supports direct buffering, while its 560 MHz bandwidth provides margin for fast transient and waveform systems. The 50 mW figure indicates low-power operation, but actual dissipation still depends on supply voltage and output load. A laboratory design should verify output-current capability, overload recovery, noise, and the exact settling behavior before selecting this obsolete part for new equipment.
Recommandé
Video and Fast Analog Waveform Conditioning
OPA650U can be evaluated for fast analog waveform-conditioning tasks where signal rise time and bandwidth are more important than extremely low offset drift. The 560 MHz unity-gain bandwidth and 0.01% settling specification support high-speed amplification, and the single SOIC package simplifies conventional surface-mount routing. Whether it drives a video load depends on unverified output-current and output-swing data. Designers should also examine harmonic distortion, slew rate, output impedance, and stability with the intended cable or termination before using it in production.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour OPA650U — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Package | 8-pin SOIC |
| Brand | Texas Instruments |
| Amplifier Architecture | Voltage feedback |
| Unity-Gain Bandwidth | 560 MHz |
| Power Consumption | 50 mW |
| Input Bias Current | 5 µA |
| Harmonic Characterization Point | 5 MHz |
| Settling Accuracy | 0.01% |
| Gain Stability | Unity-gain stable |
| Lifecycle Status | Obsolete |
Principaux différenciateurs
- High unity-gain bandwidth for a low-power SOIC amplifier (vs OPA656U)
- Low input bias current for higher-impedance source interfaces (vs OPA656U)
- Documented fast settling and harmonic-characterization points (vs OPA656U)
Notes de conception
Keep the feedback loop and both amplifier inputs as short as practical, and place the manufacturer-recommended bypass capacitors directly at the supply pins. High-speed operation makes trace inductance and ground impedance significant, so avoid splitting the ground return beneath the device and keep output routing away from sensitive input traces. Validate the physical layout because the retrieved excerpts provide no recommended-land-pattern or bypass-component details.
Do not interpret 560 MHz unity-gain bandwidth as guaranteed usable bandwidth at every closed-loop gain. Noise gain, feedback resistor values, parasitic capacitance, load, and output capacitance determine stability and settling. Build the intended filter or gain stage and verify gain, phase margin, overshoot, and 0.01% settling on hardware with the same source and load conditions planned for production.
Use the verified 50 mW operating figure as a design clue, not as a substitute for worst-case thermal analysis. Check the manufacturer limits for supply voltage, output current, package dissipation, and junction temperature. At elevated ambient temperature or with large output swings, estimate dissipation from actual operating conditions and confirm that the available SOIC copper area and airflow keep the junction below the rated limit.
OPA650U is reported obsolete, so inventory age and lot traceability may be more important than the nominal price. Require supplier traceability, inspect devices for damage or prior rework, and validate every received lot against the manufacturer datasheet and target application. For a new design, compare a currently supported amplifier with complete electrical data before accepting the added supply-chain risk of an obsolete part.
Informations de conformité
The supplied excerpts do not provide verified OPA650U compliance declarations. The 13-page datasheet listing and lifecycle information were available, but RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require supporting manufacturer or lot documentation.