LM258AP - Dual 30V 700kHz Op Amp | Texas Instruments
Référence : LM258AP ✓ ActifLM258AP Présentation
An operational amplifier is an analog semiconductor that amplifies the voltage difference between its two inputs. Its applications include voltage buffers, current-to-voltage conversion, active filters, comparators, instrumentation circuits, and low-frequency closed-loop control. The dual LM258 architecture provides two amplifiers in one package, reducing board area in designs that need independent or complementary analog channels. The LM258A operating-temperature range extends from -25°C to 85°C.
The principal characteristics are a 700 kHz typical gain-bandwidth product, 0.3 V/µs slew rate, and 3 mV offset voltage for LM258A. The device operates with total supply voltages from 3 V to 32 V, including single-supply configurations near 3 V and split supplies up to approximately ±16 V. Its 8-pin PDIP package also facilitates prototyping and through-hole assembly where leaded components are preferred.
LM258 devices are internally frequency-compensated dual operational amplifiers. Internal compensation allows operation as unity-gain voltage followers without external compensation components, which simplifies many basic amplifier layouts. Users must still observe input common-mode and output-swing limits, maintain the specified supply voltage, and use adequate bypassing to prevent oscillation or unexpected analog noise. The dual configuration also permits one channel to perform signal amplification while the other handles a separate task.
Typical uses include low-frequency active filters, DC sensor amplification, industrial control-signal conditioning, audio preamplifier stages, comparators, and general instrumentation. In a basic non-inverting stage, the closed-loop gain is established by the feedback network, while the amplifier provides high input impedance and low output impedance. In a transimpedance stage, the feedback resistor converts input current into a voltage, making the LM258 suitable for photodiode and detector interfaces when operating within its bandwidth and dynamic-range limits.
A critical design consideration is to place the specified bypass capacitor close to the supply pins and route feedback components to minimize parasitic capacitance and oscillation risk. Check common-mode input range, output swing, load capability, and thermal dissipation at the actual supply voltage. Keep sensitive input nodes away from switching-current paths and use a stable ground reference to reduce offset and noise pickup.
This product page combines manufacturer specifications, package details, drop-in alternatives, application guidance, and design considerations for engineers evaluating the LM258AP. It also distinguishes verified electrical parameters from parameters that require design confirmation, helping teams plan analog prototypes, production PCB layouts, and replacement decisions with fewer assumption-driven errors.
Alternatives de remplacement direct pour LM258AP — 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 LM258AP (même facteur de forme et même empreinte) — différant par Package, Mounting Type, Amplifier Type, Operating Temperature Range, Maximum Supply Voltage.
LM258P
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →LM2904P3
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →LM358PT
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →LM258AP Valeurs maximales et caractéristiques électriques
| Amplifier Type | Dual general-purpose operational amplifier |
| Number of Channels | 2 circuits |
| Gain-Bandwidth Product | 700 kHz |
| Slew Rate | 0.3 V/µs |
| Input Offset Voltage | 3 mV for LM258A |
| Maximum Total Supply Voltage | 30 V |
| Total Supply Voltage Range | 3 V to 32 V |
| Single-Supply Output Voltage | ±1.5 V to ±16 V |
| Plage de température de fonctionnement | -25°C to +85°C |
| Boîtier | 8-pin PDIP |
| Type de montage | Through-hole |
| Compensation | Internally frequency compensated |
| Supply Configuration | Single supply or split supply |
| Product Family | LM258 / LM258A |
Guide de configuration des broches du LM258AP 8-pin pdip
Configuration des broches du LM258AP (boîtier 8-pin pdip). 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 LM258AP.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
LM258AP convient pour 6 applications: Active Analog Filters, Sensor Signal Conditioning, Transimpedance Amplifier, Industrial Control Signal Conditioning, Audio Preamplifier, Comparator and Threshold Circuit.
Active Analog Filters
The LM258AP suits low-frequency active-filter sections because each channel provides a 700 kHz gain-bandwidth product and 0.3 V/µs slew rate in an 8-pin PDIP package. Two amplifiers can implement a second-order filter or independent signal-conditioning stages without requiring separate packages. The filter’s closed-loop gain must remain compatible with the amplifier’s bandwidth and stability behavior, while input and output signals must remain within the common-mode and swing limits. Decoupling capacitors should be placed close to the supply pins, and high-impedance feedback nodes should be kept physically short to minimize parasitic pickup and instability. This configuration is useful for smoothing sensor signals, removing out-of-band noise, and conditioning analog channels before conversion or control.
Recommandé
Sensor Signal Conditioning
LM258AP can amplify weak outputs from sensors that operate within a suitable common-mode range and require moderate bandwidth. Its 700 kHz gain-bandwidth product supports low- and mid-frequency conditioning rather than high-speed instrumentation, while the 3 mV LM258A offset-voltage specification helps define the input-referred error budget. A typical circuit uses one channel as a non-inverting or inverting amplifier and the second channel for buffering or reference-level conditioning. The design should verify input bias current, input common-mode limits, output swing, and offset against sensor tolerances. Use a quiet ground plane and separate high-current return paths to prevent sensor excitation current from shifting the reference node and corrupting the amplified measurement.
Recommandé
Transimpedance Amplifier
The LM258AP can convert current from a photodiode, photoresistor, or other current-source sensor into a voltage using a feedback resistor and return path. The 700 kHz gain-bandwidth product and 0.3 V/µs slew rate provide useful low-frequency headroom, while the dual package can provide a second channel for bias generation or output filtering. Compensation and stray-capacitance control are essential because the feedback impedance and sensor capacitance determine loop stability. Input bias current, output swing, supply headroom, and saturation recovery must also be checked for the expected light or current range. Place the feedback components close to the amplifier and keep the sensitive input node compact to reduce parasitic capacitance and photocurrent leakage effects.
Recommandé
Industrial Control Signal Conditioning
LM258AP fits industrial control tasks that require two general-purpose amplifier channels and a wide supply range. Its LM258A-family 700 kHz gain-bandwidth product and 0.3 V/µs slew rate are appropriate for conditioning slow control and feedback signals rather than high-speed communications. One channel can amplify a command or sensor level, and the other can buffer an actuator-control signal or form part of an active compensation loop. Designers should verify operation over the intended -25°C to +85°C range, check common-mode limits for the selected supply, and account for output-current demand at the load. Robust grounding, local supply bypassing, and physical separation from motors, relays, and switching converters help prevent control-loop errors and unwanted coupling.
Recommandé
Audio Preamplifier
LM258AP can serve as a general-purpose audio preamplifier when the signal bandwidth and distortion requirements remain within the operational amplifier’s limits. The 0.3 V/µs slew rate must be compared with the required full-scale output amplitude and highest audio frequency, while the approximately 3 mV LM258A input offset can create audible DC headroom usage in high-gain stages. The dual package allows one channel to provide gain and the other to perform input or output buffering. A practical design should include input coupling or biasing appropriate to the source, decoupling near the supply pins, and a quiet ground implementation. Confirm the expected source impedance, load impedance, and noise contribution because the device is a general-purpose amplifier rather than a dedicated low-noise audio part.
Recommandé
Comparator and Threshold Circuit
LM258AP can implement a comparator-style threshold circuit when its input offset, propagation behavior, saturation recovery, and output levels meet the system requirements. The dual configuration allows one channel to establish a reference voltage while the other compares the sensed signal against that threshold, or allows two independent threshold stages to be implemented. A pullback resistor may be required to keep the output in its linear region, and the output should not be loaded beyond the device’s rated capability. Because a general-purpose operational amplifier is not automatically optimized for logic-level thresholding, verify output voltage levels, overdrive recovery, input common-mode range, and supply polarity. Stable reference routing and proper bypassing are particularly important when the threshold controls a relay, actuator, or industrial alarm input.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LM258AP — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LM258P | LM2904P3 | LM358P |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP |
| Amplifier Configuration | Dual | Dual | Dual | Dual |
Principaux différenciateurs
- Closest same-family package match (vs LM258P)
- Higher-bandwidth family choice than LM2904 (vs LM2904P3)
- Dual general-purpose amplification in a leaded package (vs LM358P)
Notes de conception
Place the manufacturer-specified supply-bypass capacitor adjacent to the supply and ground pins, with a short and low-inductance path between the capacitor and IC. Route output and feedback traces away from input and reference nets to reduce capacitive coupling. Because this is an internally compensated general-purpose amplifier, preserve a compact feedback loop and avoid long exposed high-impedance traces that can increase noise pickup or compromise stability.
Do not assume the 30 V maximum supply rating permits operation at every intermediate voltage or configuration. Check the minimum total supply, input common-mode range, output swing, and input/output absolute maximum limits under worst-case conditions. Also verify that the chosen gain and load are stable with the selected feedback network. A signal outside the common-mode range can produce unexpected output behavior even when the supply voltage is valid.
For small-signal sensor and transimpedance applications, evaluate input bias current, offset voltage, noise, parasitic capacitance, and output-loading requirements in addition to bandwidth. Keep sensor-return and reference grounds separated from high-current return paths. The 700 kHz gain-bandwidth product and 0.3 V/µs slew rate are suitable for low- to mid-frequency conditioning, but they do not guarantee precision or high-speed performance in every circuit configuration.
Informations de conformité
The manufacturer product pages identify the LM258 and LM258A families, but explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status were not established for the exact LM258AP ordering code.