MC1458DE4 - Dual 1 MHz Op Amp | Texas Instruments
Référence : MC1458DE4 ✓ ActifMC1458DE4 Présentation
An operational amplifier, or op amp, is a voltage-gain building block within analog and mixed-signal electronics. MC1458DE4 belongs to the general-purpose operational-amplifier class and contains two amplifier channels in one package. Its internally compensated architecture simplifies circuit construction in voltage followers, summing amplifiers, comparators, and general signal-conditioning networks. The two channels can process different analog signals or can be used together for filtering, instrumentation, and differential circuit functions when the application requires it.
Key characteristics include two amplifier circuits, a 1 MHz gain-bandwidth product, a 0.5 V/µs slew rate, a 15 V supply designation, and integrated frequency compensation. The manufacturer describes the amplifier as low-power, protected against latch-up, and intended for voltage-follower use. Unlike implementations that expose offset-null terminals, the MC1458 family is described as having each amplifier half electrically similar to a µA741 without offset-null capability. The absence of those terminals simplifies the pin assignment and reduces external component count.
The internally compensated amplifiers provide stable operation in voltage-follower configurations without external frequency-compensation networks. Their approximately 1 MHz bandwidth is suitable for audio-frequency and general instrumentation signal paths where moderate bandwidth is sufficient. The 0.5 V/µs slew rate determines how rapidly output voltage can follow a changing input, making the device appropriate for general analog amplification rather than high-speed pulse or wideband signal processing.
Typical uses include audio preamplification, summing and averaging amplifiers, voltage followers, sensor signal conditioning, comparator-style threshold circuits, and educational or laboratory analog designs. The 8-pin SOIC package allows two amplifier channels to be placed on a compact through-hole PCB footprint, while the device's two-circuit organization can reduce component count when both positive and negative signals are processed.
Designers should account for supply headroom, common-mode input range, output swing, and the bandwidth available at the selected closed-loop gain. Decoupling capacitors should be placed close to the supply pins, and sensitive analog layouts should minimize trace resistance and coupling from switching circuitry. The most important sourcing check is pinout and footprint compatibility, because different package suffixes of the MC1458 family can use different standard packages.
This product page consolidates the MC1458DE4 electrical identity, package information, practical use cases, verified source links, and design guidance. It also distinguishes confirmed drop-in candidates from package or electrical variants, helping engineers evaluate replacements without assuming that a similar amplifier description guarantees a compatible PCB footprint.
Alternatives de remplacement direct pour MC1458DE4 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
LM1458MX/NOPB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC1458ID
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →MC1458DE4 Valeurs maximales et caractéristiques électriques
| Amplifier Type | General Purpose |
| Number of Circuits | 2 circuits |
| Gain-Bandwidth Product | 1 MHz |
| Slew Rate | 0.5 V/µs |
| Tension d'alimentation | 15 V |
| Boîtier | 8-SOIC |
| Package Width | 3.90 mm (0.154 inch) |
| Type de montage | Surface Mount |
| Frequency Compensation | Internal; no external frequency compensation required |
| Offset Null Capability | Not provided |
| Latch-Up Protection | Yes |
| Low Power Consumption | Yes |
| Short-Circuit Protection | Yes |
| Statut RoHS | RoHS-compliant |
| Lead-Free Status | Lead-free |
Configuration des broches de MC1458DE4
| Broche 1 | OUTA — Amplifier A output |
| Broche 2 | INA- — Inverting input for amplifier A |
| Broche 3 | INA+ — Non-inverting input for amplifier A |
| Broche 4 | V- — Negative supply connection |
| Broche 5 | INB+ — Non-inverting input for amplifier B |
| Broche 6 | OUTB — Amplifier B output |
| Broche 7 | V+ — Positive supply connection |
| Broche 8 | INB- — Inverting input for amplifier B |
Applications typiques
MC1458DE4 convient pour 6 applications: Audio Preamplification, Sensor Signal Conditioning, Summing Amplifier, Voltage Follower Buffer, Comparator Threshold Circuit, Laboratory and Educational Analog Circuits.
Audio Preamplification
MC1458DE4 suits general audio preamplifier stages requiring two amplifiers, approximately 1 MHz of gain-bandwidth product, and a 0.5 V/µs slew rate. Each internally compensated channel can implement a voltage follower or a moderate-gain stage around the audio band. This is appropriate for line-level buffering, mixer subcircuits, and control-signal conditioning where rail-to-rail operation is unnecessary. The designer should verify output swing, input offset, noise, and distortion against the audio requirement, while keeping the 8-SOIC layout compact and placing decoupling close to the supply pins.
Recommandé
Sensor Signal Conditioning
MC1458DE4 can amplify and buffer moderate-bandwidth sensor outputs when the source does not require a very low input bias current. Its two general-purpose channels allow one stage to amplify a sensor signal and another to buffer or level-shift a reference or control signal. The 1 MHz gain-bandwidth product and 0.5 V/µs slew rate are suitable for many process, position, and industrial instrumentation signals, but the final design must remain inside the common-mode input range and output-swing limits. High-impedance sensors require a separate bias-current review.
Recommandé
Summing Amplifier
MC1458DE4 is suitable for an inverting summing network in which several signals are combined through feedback resistors. Its internally compensated amplifier channels support stable voltage-feedback operation without external compensation components, and the dual arrangement permits two independent summing or mixing functions on one PCB footprint. The usable bandwidth decreases with closed-loop gain, so the 1 MHz gain-bandwidth product should be divided among the required noise gain, source resistance, and feedback resistance. Input common-mode range and output swing remain important constraints when combining multiple signals.
Recommandé
Voltage Follower Buffer
The internally compensated channels in MC1458DE4 are appropriate for voltage-follower buffers where the goal is high impedance at the source and low output impedance to the next stage. A follower is especially useful for isolating sensor outputs, control signals, or divider networks from subsequent loading. Both channels are compensated internally, which simplifies the board and avoids external frequency-compensation components. The implementation should still verify the source impedance, capacitive load, stable operating region, input bias current, and the 0.5 V/µs slew rate under the expected output transition.
Recommandé
Comparator Threshold Circuit
MC1458DE4 can operate as an open-loop threshold comparator in a general analog system. The dual configuration allows two independent threshold decisions, such as upper and lower limits, while the approximately 1 MHz bandwidth provides enough response speed for many slow control and monitoring functions. Because the amplifier transitions near the output-swing limits rather than operating as a rail-to-rail comparator, the usable common-mode and output ranges must be checked carefully. Hysteresis resistors or positive feedback can be added to prevent repeated output switching near the threshold.
Recommandé
Laboratory and Educational Analog Circuits
MC1458DE4 is well suited to laboratory breadboards and teaching circuits because it combines two general-purpose amplifier channels, internal frequency compensation, and a standard 8-SOIC footprint. Students can configure the same package as noninverting, inverting, summing, differential, or voltage-follower blocks without external compensation capacitors. The 1 MHz bandwidth and 0.5 V/µs slew rate support audio-frequency experiments and basic control demonstrations. Before connecting sensitive instrumentation, confirm the power rails, input range, and output swing to avoid clipping or inaccurate observations.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC1458DE4 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LM1458MX/NOPB | MC1458ID |
|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Type | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 | 2 |
| Gain-Bandwidth Product | 1 MHz | 1 MHz | 1 MHz |
| Slew Rate | 0.5 V/µs | 0.5 V/µs | 0.5 V/µs |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
Principaux différenciateurs
- Two general-purpose amplifier channels in one package (vs MC1458ID)
- Documented 1 MHz bandwidth and 0.5 V/µs slew rate (vs LM1458MX/NOPB)
- Internal frequency compensation simplifies implementation (vs MC1458ID)
Notes de conception
Place the supply-bypass capacitors directly between the V+ and V- pins and their respective ground references, with the ground-return paths kept short. Route the two amplifier channels according to the pin table rather than a generic SOIC symbol. When substituting LM1458MX/NOPB or MC1458ID, compare land-pattern dimensions and every pin name before releasing artwork, since package suffix and pin assignment differences can prevent otherwise similar devices from operating.
Keep sensitive non-inverting inputs away from output and supply-return paths to reduce parasitic feedback. For inverting summing or gain stages, use feedback resistors that are practical for the required accuracy and bandwidth; the effective closed-loop bandwidth is limited by the 1 MHz gain-bandwidth product and the selected noise gain. Add deliberate grounding and shielding rather than relying on a large ground pour alone when the source impedance is high.
Do not assume that the 15 V supply designation permits operation exactly at 15 V under all conditions. Check the positive and negative supply limits, common-mode input range, and output swing in the manufacturer datasheet. Also avoid assuming that an amplifier with a 1 MHz gain-bandwidth product remains stable at every gain or with every capacitive load; verify the intended noise gain and output loading before production.
Informations de conformité
The product listing describes MC1458DE4 as a RoHS-compliant, lead-free, green component. No explicit REACH, halogen-free, conflict-minerals, or automotive-qualification statement was established.
