OPA637AP - 80MHz Precision Difet Op Amp DIP-8 | Texas Instruments
Référence : OPA637AP ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1 | $1,00 |
OPA637AP Présentation
A high-speed operational amplifier is a voltage-feedback amplifier designed to combine wide bandwidth with DC precision, sitting within the hierarchy: op-amp -> precision amplifier -> analog signal conditioning IC -> semiconductor. Where general-purpose amplifiers trade speed for accuracy, precision high-speed parts like the OPA637 preserve both, enabling high-dynamic-range analog signal chains.
Key features of the OPA637AP include a very low maximum offset voltage of 100 uV, a maximum offset drift of 0.8 uV/C, and a maximum input bias current of only 5 pA thanks to the Difet (dielectrically isolated FET) input process. The amplifier settles fast to 0.01% accuracy and is unity-gain bandwidth specified at 80 MHz. Unlike its sibling OPA627, which is unity-gain stable, the OPA637 is stable only at closed-loop gains of 5 or greater - the compensation scheme de-compensates the amplifier to achieve its higher bandwidth, which is why the 80 MHz figure exceeds the OPA627's.
The Difet process uses dielectric isolation rather than junction isolation, sharply reducing input capacitance and leakage. This yields the picoampere-class bias current and low noise typically associated with JFET-input precision amplifiers while preserving the high slew rate needed for fast pulse and wideband AC signals.
Typical applications include wideband data-acquisition front ends, fast pulse amplification in test and measurement instruments, photodiode transimpedance stages with high closed-loop gain, and active filters in precision instrumentation.
A key design consideration: because the OPA637 requires a minimum closed-loop gain of 5 for stability, do not substitute it for the unity-gain-stable OPA627 in follower configurations. Verify noise-gain margins and use good high-frequency PCB layout with short feedback paths.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour OPA637AP — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec OPA637AP (même facteur de forme et même empreinte) — différant par Input Type, Package, Stability.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesOPA637AP Valeurs maximales et caractéristiques électriques
| Amplifier Type | Precision High-Speed Difet Operational Amplifier |
| Number of Channels | 1 |
| Gain Bandwidth Product | 80 MHz |
| Slew Rate | 135 V/us |
| Input Offset Voltage (max) | 100 uV |
| Offset Voltage Drift (max) | 0.8 uV/C |
| Input Bias Current (max) | 5 pA |
| Settling Time to 0.01% | Fast settling (see manufacturer datasheet for typ value) |
| Supply Voltage Range | +/-4.5 V to +/-18 V |
| Stability | Stable in closed-loop gains of 5 or greater |
| Input Type | Difet (dielectrically isolated FET) |
| Boîtier | 8-PDIP |
| Type de montage | Through Hole |
| Statut RoHS | unknown |
Configuration des broches de OPA637AP
| Broche 1 | TRIM A — Offset voltage trim terminal A (connect to trim potentiometer) |
| Broche 2 | -IN — Inverting input |
| Broche 3 | +IN — Non-inverting input |
| Broche 4 | V- — Negative supply |
| Broche 5 | NC — Not connected (per datasheet) |
| Broche 6 | OUT — Output |
| Broche 7 | V+ — Positive supply |
| Broche 8 | TRIM B — Offset voltage trim terminal B (connect to trim potentiometer) |
Applications typiques
OPA637AP convient pour 3 applications: Conditionnement du signal, Acquisition de données, Traitement audio.
Conditionnement du signal
Amplification et filtrage des signaux de capteurs à l'aide de OPA637AP.
Acquisition de données
Conversion de signaux analogiques pour le traitement numérique avec OPA637AP.
Traitement audio
Amplification et traitement des signaux audio avec OPA637AP.
Aucune FAQ disponible pour ce produit.
Données de référence d'ingénierie pour OPA637AP — comparaison, recommandations de conception et informations de conformité.
Informations de conformité
Compliance data not present in provided web data; verify on the TI product page before procurement.
