LT1058CJ - Quad 14V/us JFET Op Amp | Analog Devices
Référence : LT1058CJ ✓ ActifLT1058CJ Présentation
A JFET-input operational amplifier is a voltage-amplifier IC whose input stage uses junction field-effect transistors. This input architecture provides very low bias current, high input impedance, and effective operation with high-impedance sensors. Within the amplifier hierarchy, the LT1058CJ belongs to the precision operational-amplifier family and ultimately to the broader analog signal-processing and semiconductor categories.
Key characteristics include 14 V/us minimum slew rate, 10 V/us minimum slew rate in one operating specification, a 5 MHz minimum gain-bandwidth product, and a fast settling specification of 0.02%. The LT1058 version has a maximum offset voltage of 600 uV. Input bias current is specified at 7 pA, supporting high-impedance sources whose leakage currents could otherwise create significant input-voltage errors.
The four-amplifier configuration reduces the number of packages required for multi-channel analog systems. Four amplifiers in one 14-pin ceramic dual-inline package simplify board layout while supporting per-channel configuration as filters, buffers, gain stages, or instrumentation amplifiers. The precision JFET input stage makes the device especially useful where source impedance, bias-current error, and signal fidelity are more important than minimum cost or smallest area.
Typical applications include low-level sensor signal conditioning, laboratory instrumentation, audio preamplification, active filtering, data-acquisition front ends, and precision current-voltage conversion. In a sensor interface, the amplifier can provide high input impedance without drawing significant current from the sensor. In an instrumentation chain, its low bias current helps preserve the integrity of small signals while its 14 V/us slew rate supports faster waveform transitions.
Design with the input common-mode range, output swing, supply voltage, and stability requirements in mind. Ceramic decoupling should be placed close to the supply pins, and unused amplifier channels should be configured according to the manufacturer’s recommended stable topology. The ceramic package provides a temperature grade suitable for demanding industrial and military applications, subject to the complete ordering information.
This page combines the LT1058CJ’s principal electrical and packaging characteristics with application guidance, engineering notes, and cross-reference analysis. It focuses on design-relevant distinctions such as input bias current, slew rate, gain-bandwidth product, channel count, and the practical limitations of replacement packages.
Alternatives de remplacement direct pour LT1058CJ — 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 alternativesLT1058CJ Valeurs maximales et caractéristiques électriques
| Amplifier Type | Precision JFET-input operational amplifier |
| Number of Circuits | 4 circuits |
| Boîtier | 14-pin CERDIP, 0.300 in (7.62 mm) pitch |
| Style de montage | Through-hole |
| Slew Rate | 14 V/us |
| Minimum Slew Rate | 10 V/us |
| Gain-Bandwidth Product | 5 MHz minimum |
| Fast Settling Time | 0.02% settling specification |
| Offset Voltage | 600 uV maximum |
| Input Bias Current | 7 pA |
| Tension d'alimentation | +/-20 V |
| Input Stage | JFET |
| Nombre de broches | 14 pins |
| Lead Spacing | 0.300 in (7.62 mm) |
Guide de configuration des broches du LT1058CJ 14-pin cerdip, 0.300 in (7.62 mm) pitch
Configuration des broches du LT1058CJ (boîtier 14-pin cerdip, 0.300 in (7.62 mm) pitch). 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 LT1058CJ.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
LT1058CJ convient pour 6 applications: High-Impedance Sensor Signal Conditioning, Precision Data-Acquisition Front End, Audio Preamplification, Laboratory Instrumentation, Precision Current-to-Voltage Conversion, Industrial Control and Analog Filtering.
High-Impedance Sensor Signal Conditioning
The LT1058CJ fits sensor interfaces whose source resistance makes amplifier input current a significant error source. Its JFET input stage is specified at 7 pA input bias current, helping preserve the voltage represented by a weak sensor signal. Four amplifiers can handle several stages of the same measurement chain, including buffering, gain, filtering, and output conditioning. The 14 V/us slew rate supports faster signal transitions, while the 5 MHz minimum gain-bandwidth product is useful for moderate-bandwidth precision systems. Confirm the sensor leakage, source impedance, common-mode voltage, and settling requirements before choosing the amplifier gain.
Recommandé
Precision Data-Acquisition Front End
The LT1058CJ can condition multiple low-level channels ahead of an ADC, where low input current and precision offset behavior are valuable. Its four-amplifier count reduces the number of packages required for a multi-channel front end, while the 14 V/us slew rate helps preserve large-signal transitions. Engineers can implement differential excitation, gain, active filtering, and driver functions around the quad device. The design should verify the ADC input range, acquisition time, noise requirements, and the LT1058CJ output-swing limits before assigning the gain and bandwidth.
Recommandé
Audio Preamplification
The LT1058CJ is suitable for precision preamplifier and active-filter stages that benefit from JFET input behavior. The specified 7 pA input bias current is especially helpful with high-impedance source networks, while the 14 V/us slew rate provides greater headroom for fast signal edges than many precision JFET amplifiers. Each of the four amplifiers can support a separate gain or filtering path in professional audio equipment. Validate noise density, harmonic distortion, output drive, and channel-to-channel behavior against the system specification because the primary published characteristics emphasize speed and precision rather than audio-specific noise ratings.
Recommandé
Laboratory Instrumentation
The LT1058CJ fits laboratory buffer, amplifier, and filter circuits requiring four precision channels in one package. Its JFET input stage minimizes loading from high-impedance probes and dividers, and its 14 V/us slew rate supports measurement signals that change quickly. Quad integration simplifies instrumentation front panels where multiple analog functions would otherwise require separate devices. The ceramic DIP package also matches legacy laboratory and industrial equipment layouts. Before insertion, confirm the operating-temperature grade, power requirements, offset calibration needs, and whether the instrument requires a specific amplifier family for compatibility.
Recommandé
Precision Current-to-Voltage Conversion
The LT1058CJ can form a transimpedance or current-to-voltage conversion stage when the measured source produces very small currents. A 7 pA input bias current limits the DC error introduced by the amplifier input stage, which is especially important when the sensor current is close to that magnitude. The four channels permit parallel conversion, differential support, or auxiliary filtering and output amplification. Keep input-node capacitance low, use guarded routing where appropriate, and verify the complete current range, resistor tolerance, output compliance, and bandwidth against the target measurement accuracy.
Recommandé
Industrial Control and Analog Filtering
The LT1058CJ can implement active filters, buffers, error amplifiers, and signal-conditioning blocks in industrial control electronics. Four independent JFET-input amplifiers provide a compact way to handle several low-frequency control or measurement channels. The 5 MHz gain-bandwidth product and 14 V/us slew rate offer useful bandwidth and transient-response margin, but they do not replace the stability analysis required for a particular filter topology. Check the control-loop phase margin, filter tolerances, supply transients, and temperature range before using the device in a closed-loop system.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LT1058CJ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Amplifier Type | Quad precision JFET-input operational amplifier |
| Number of Circuits | 4 circuits |
| Package | 14-pin CERDIP, 0.300 in (7.62 mm) pitch |
| Brand | Analog Devices |
| Slew Rate | 14 V/us |
| Gain-Bandwidth Product | 5 MHz minimum |
| Input Bias Current | 7 pA |
| Maximum Offset Voltage | 600 uV |
| Supply Voltage | +/-20 V |
Principaux différenciateurs
- Four amplifiers in one ceramic DIP package (vs LT1058CN)
- Low-input-current JFET signal conditioning (vs LT1058CN)
- Precision and transient-response combination (vs LT1058CN)
Notes de conception
Place supply-bypass capacitors directly between the positive and negative supply pins and the nearest ground return. Because the package contains four amplifiers, local decoupling limits shared-supply disturbance between channels. Route the input pins as short and guarded as practical, particularly when they connect to high-impedance sources; leakage from board contamination can create errors comparable to the 7 pA input bias current. Keep analog signal paths away from switching power nodes and high-current return paths.
Do not assume that a functional quad amplifier with the same pin functions is a mechanical drop-in replacement. The LT1058CN has the same general amplifier arrangement and characteristics, but its PDIP construction differs from the LT1058CJ CERDIP package. Confirm the package drawing, lead spacing, temperature grade, and soldering process before substitution. For unused amplifier sections, use the manufacturer’s stable configuration rather than allowing an open input to float.
Treat the JFET input stage as a high-impedance node. Keep PCB contamination, flux residue, moisture, and nearby leakage-producing paths away from the input pins. When driving long cables or using capacitive sensors, add protection that does not introduce excessive junction capacitance, and evaluate possible input-transistor protection diodes. The 5 MHz gain-bandwidth product must also be compared with the required closed-loop bandwidth and stability margin.
Informations de conformité
The LT1058CJ is a commercial-grade JFET-input operational amplifier in a ceramic DIP package. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not established from the available product information.
