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STMicroelectronics MC33078DT
- Part No.:
- MC33078DT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33078DT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:34,973
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Product details
Overview
MC33078DT from STMicroelectronics is a low-noise dual operational amplifier in SO-8 package, designed for high-fidelity audio signal conditioning. It delivers 4.5 nV/√Hz input voltage noise, 15 MHz gain bandwidth product, and 7 V/µs slew rate, enabling clean amplification of wideband analog signals in consumer and professional audio equipment.
For engineers reviewing the MC33078DT datasheet, MC33078DT pinout, MC33078DT application, or MC33078DT equivalent, this device is selected for precision dual-channel amplification where low distortion (0.002% THD), rail-swing output (±14.3 V / ±14.6 V at ±15 V supply), and stable phase margin (30°–55°) are critical to system fidelity and stability.
Technical Context
The MC33078DT integrates two independent high-speed op-amp channels on a single monolithic die, each featuring bipolar input stage with 175 kΩ input resistance and 12 pF input capacitance. Its internal compensation ensures unity-gain stability across load conditions up to 100 pF without external components.
It operates from ±2.5 V to ±15 V dual supplies, supports common-mode input range up to ±14 V, and maintains 85–100 dB large-signal voltage gain (RL = 2 kΩ) over -40 °C to +125 °C. The output stage provides symmetrical source/sink current (29 mA / 37 mA) and low 37 Ω open-loop output impedance at 9 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage noise | 4.5 nV/√Hz at 1 kHz - enables low-noise preamplification of weak audio signals without audible hiss |
| Gain bandwidth product | 15 MHz - supports stable closed-loop gain up to ×100 at 150 kHz or ×10 at 1.5 MHz |
| Slew rate | 7 V/µs - preserves transient integrity for 20 kHz full-scale sine waves (≤28 Vpp) |
| Total harmonic distortion | 0.002% at 20 Hz–20 kHz - meets Hi-Fi audio line-stage requirements |
| Output voltage swing | ±14.3 V / ±14.6 V (±15 V supply, RL = 10 kΩ) - maximizes dynamic range near supply rails |
| Common-mode rejection | 80–100 dB - rejects power supply ripple and ground noise in differential configurations |
| Supply current per channel | 2.5 mA typical - balances performance and power efficiency in dual-channel designs |
Pinout & Package
MC33078DT uses the SO-8 (Small Outline-8) plastic micropackage, 5.0 mm × 6.0 mm body, 1.27 mm lead pitch, with gull-wing leads and RoHS-compliant ECOPACK® construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (Channel 1) | Differential node for negative feedback configuration; accepts signal referenced to local ground |
| 2 | Non-inverting input (Channel 1) | High-impedance reference node; sets DC bias point and signal polarity |
| 3 | Output (Channel 1) | Class-AB push-pull output capable of ±14.6 V swing into 10 kΩ load |
| 4 | Positive supply (VCC+) | Connects to +VS rail; powers both amplifiers and internal bias circuitry |
| 5 | Negative supply (VCC−) | Connects to −VS rail; completes dual-supply operation and enables true bipolar signal handling |
| 6 | Output (Channel 2) | Independent output stage identical to Pin 3; supports stereo or dual-path signal processing |
| 7 | Inverting input (Channel 2) | Second differential input; electrically isolated from Channel 1 except shared supply rails |
| 8 | Non-inverting input (Channel 2) | Second high-Z reference node; allows independent gain and offset control per channel |
Key Features
| Feature | Design Value |
|---|---|
| Low-distortion output stage | 0.002% THD at 3 Vrms, 20 Hz–20 kHz - eliminates audible coloration in line-level audio paths |
| ESD-protected inputs | 2 kV HBM rating - withstands handling and board-level ESD events without latch-up or parameter shift |
| Macromodel availability | SPICE-compatible behavioral model included - enables accurate AC, transient, and noise simulation prior to prototyping |
| Thermal robustness | 125 °C/W junction-to-ambient (SO-8) - supports operation in enclosed enclosures up to +85 °C ambient |
| Wide common-mode range | ±14 V at ±15 V supply - accommodates input signals near supply rails without clipping or phase reversal |
Applications
| Professional Audio Mixer Channel | Studio Monitor Preamp |
|---|---|
Use Scenario: Dual-channel summing and level control in analog mixing consoles with discrete gain stages. IC Role / Device Role / Timing Role: Dual op-amp providing buffered summing node and post-fader gain boost with minimal crosstalk (120 dB channel separation). Use Value: Preserves signal integrity across 20 Hz–20 kHz with <0.002% THD, enabling transparent signal routing without additive noise or intermodulation. | Use Scenario: High-precision line-level amplification before active crossover and power amp stages in bi/tri-amped studio monitors. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer and gain stage ensuring flat frequency response and transient accuracy. Use Value: 4.5 nV/√Hz input noise and 7 V/µs slew rate prevent audible degradation of transients and low-level detail in critical listening environments. |
| Automotive Infotainment Line Output | Medical Instrumentation Signal Conditioning |
Use Scenario: Buffered analog audio outputs from head unit DSPs to external amplifiers in vehicles with wide temperature variation. IC Role / Device Role / Timing Role: Dual-channel driver meeting AEC-Q100 qualified variants (e.g., MC33078YDT) for automotive-grade reliability. Use Value: Guaranteed operation from −40 °C to +125 °C ambient, with ±14.3 V output swing preserving dynamic range despite battery voltage fluctuations. | Use Scenario: Amplifying low-amplitude bio-sensor signals (e.g., ECG front-end) requiring high CMRR and low noise. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier building block with matched dual channels for differential gain and offset trimming. Use Value: 100 dB CMRR and 85–100 dB open-loop gain enable precise rejection of 50/60 Hz mains interference while amplifying µV-level signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NE5532DR | Higher input bias current (300–800 nA vs. 250–800 nA), identical 3.5–10 MHz GBP, slightly lower slew rate (9 V/µs) | Widely used in legacy pro-audio gear; less optimized for >100 kHz bandwidth | Select when cost sensitivity outweighs need for >12 MHz full-power bandwidth |
| TL072CDR | JFET-input (lower Iib: 30 pA), higher input voltage noise (18 nV/√Hz), lower GBP (3 MHz) | Better for high-impedance sensor interfaces; unsuitable for wideband audio | Select only for DC-coupled, high-Z, low-frequency applications where noise is secondary |
Compared with NE5532DR and TL072CDR, MC33078DT offers superior noise-performance trade-off (4.5 nV/√Hz at 15 MHz GBP) and wider usable bandwidth-making it optimal for modern audio systems demanding both fidelity and speed.
Availability
MC33078DT is available at Aetrix Electronics and suitable for professional audio equipment, automotive infotainment systems, and medical instrumentation requiring stable component supply, extended temperature operation, and consistent parametric performance across production lots.
Supply support for MC33078DT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The MC33078 belongs to ST's precision analog op-amp product line, engineered specifically for high-fidelity audio signal chains where low noise, low distortion, and wide bandwidth must coexist without compromise.
FAQ
Is MC33078DT unity-gain stable?
Yes, MC33078DT is internally compensated for unity-gain stability. Its phase margin remains ≥30° with 100 pF capacitive load and ≥55° with no load (RL = 2 kΩ), enabling direct use in voltage-follower and non-inverting gain ≥1 configurations without external compensation.
What is the maximum safe supply voltage for MC33078DT?
The absolute maximum supply voltage is ±18 V (or +36 V total). However, the recommended operating range is ±2.5 V to ±15 V. Operation above ±15 V risks exceeding thermal limits in SO-8 packaging due to increased quiescent power dissipation and reduced thermal resistance margin.
Does MC33078DT support single-supply operation?
No, MC33078DT is not specified for true single-supply operation. Its input common-mode range extends to within 1 V of the negative rail and output swing reaches within 1.4 V of either rail-but it requires dual symmetric supplies (e.g., ±15 V or ±12 V) to achieve full specified performance, including input offset voltage and THD.
How does the macromodel aid design validation?
The included SPICE macromodel replicates key behaviors-gain bandwidth (15 MHz), slew rate (7 V/µs), output swing (±14.3 V), and phase margin (55°)-under nominal conditions. It enables accurate AC analysis, transient response prediction, and noise simulation before hardware build, reducing prototype iterations for audio filter and feedback network design.
MC33078DT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 7V/µs
- Gain Bandwidth Product:
- 15 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 250 nA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 4mA
- Current - Output / Channel:
- 37 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33078DT FAQ
1.How can I place an order for MC33078DT through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33078DT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC33078DT reliable?
The price and inventory of MC33078DT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33078DT is usually 5 days.
3.What payment methods are accepted for MC33078DT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33078DT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33078DT?
MC33078DT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33078DT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC33078DT?
For technical support, including MC33078DT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33078DT requirements.
6.How does Aetrix verify that MC33078DT is sourced from the original manufacturer or authorized distributors?
All MC33078DT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC33078DT meets industry standards.
7.What is the process for return or replacement of MC33078DT?
All MC33078DT units undergo pre-shipment inspection (PSI). If there is an issue with MC33078DT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC33078DT part is unused and in its original packaging.
Return procedure for MC33078DT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC33078DT Tags
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LM358DT
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