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Texas Instruments MC33078P
- Part No.:
- MC33078P
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MC33078P.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:324
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Product details
Overview
MC33078P from Texas Instruments is a dual high-speed, low-noise bipolar operational amplifier designed for precision audio and data-signal conditioning. It delivers 7 V/µs slew rate, 16 MHz gain-bandwidth product, 4.5 nV/√Hz input voltage noise, ±18 V dual-supply operation, and 0.002% total harmonic distortion - enabling high-fidelity signal amplification in analog front-ends and instrumentation.
For engineers reviewing the MC33078P datasheet, MC33078P pinout, MC33078P application, or MC33078P equivalent, key selection considerations include its bipolar input stage's symmetrical sink/source drive, wide common-mode input range (±13 V), large output swing (±14.1 V into 10 kΩ), and stability with capacitive loads up to 590 pF without external compensation.
Technical Context
The MC33078P employs a complementary bipolar input stage with Class AB output stage, delivering rail-to-rail input common-mode range and symmetrical output current capability (±29 mA source/sink). Its internal frequency compensation ensures unity-gain stability while maintaining 40° phase margin at 100 pF load.
Designed for dual-supply systems, it operates from ±5 V to ±18 V with specified performance across –40°C to +85°C. The device exhibits excellent AC open-loop gain (≥85 dB at 20 kHz), 100 dB CMRR, and 105 dB PSRR - critical for rejecting supply and common-mode interference in mixed-signal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 7 V/µs - enables clean amplification of fast transients up to ~1 MHz without slew-induced distortion |
| Gain-Bandwidth Product | 16 MHz - supports stable closed-loop gain ≥10 at 1.6 MHz or ≥2 at 8 MHz |
| Input Voltage Noise | 4.5 nV/√Hz at 1 kHz - suitable for low-level sensor signal amplification with minimal added noise |
| Input Offset Voltage | 0.15 mV (typ) - reduces DC error in precision DC-coupled gain stages and active filters |
| Output Voltage Swing | ±14.1 V into 10 kΩ - delivers >94% of full ±15 V supply rails, maximizing dynamic range |
| Total Harmonic Distortion | 0.002% at 3 Vrms, 20 Hz–20 kHz - meets high-fidelity audio requirements with negligible spectral contamination |
| Supply Voltage Range | ±5 V to ±18 V - compatible with legacy industrial ±12 V, ±15 V, and modern ±5 V systems |
Pinout & Package
MC33078P is housed in an 8-pin PDIP (Plastic Dual In-line Package) with 0.3-inch body width and standard through-hole mounting. Pin 1 is located at the left end of the top row when viewed from the top with notch or dot oriented upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output - drives external load; capable of ±29 mA continuous current |
| 2 | IN1− | Inverting input of Amp 1 - high-impedance node (175 kΩ differential resistance) |
| 3 | IN1+ | Non-inverting input of Amp 1 - accepts common-mode voltages from ±13 V |
| 4 | VCC− | Negative supply rail - must be connected to system ground or negative voltage rail |
| 5 | VCC+ | Positive supply rail - supplies both amplifiers; decoupling capacitor required |
| 6 | OUT2 | Amplifier 2 output - electrically isolated from OUT1; shares same supply pins |
| 7 | IN2− | Inverting input of Amp 2 - independent of Amp 1; no crosstalk above –120 dB |
| 8 | IN2+ | Non-inverting input of Amp 2 - fully differential pair with IN2−; matched to IN1± |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise bipolar architecture | 4.5 nV/√Hz input voltage noise enables high-resolution sensor interface without external filtering |
| High slew rate with low THD | 7 V/µs slew rate combined with 0.002% THD preserves waveform fidelity in audio and pulse amplification |
| Wide supply range & rail-compatible inputs | Operates from ±5 V to ±18 V with ±13 V input common-mode range - simplifies design across multiple power domains |
| Stable driving of capacitive loads | Guaranteed stability with up to 590 pF load capacitance - eliminates need for isolation resistors in many applications |
| Matched dual-channel performance | Channel-to-channel crosstalk < –120 dB ensures independent operation in stereo or differential signal paths |
Applications
| Professional Audio Preamp | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Low-noise microphone preamplification in studio-grade mixing consoles and field recorders. IC Role / Device Role / Timing Role: Dual-channel voltage amplifier providing 40–60 dB gain with minimal added noise and distortion. Use Value: 4.5 nV/√Hz noise floor and 0.002% THD preserve acoustic detail and transient response in critical listening environments. | Use Scenario: Amplifying millivolt-level outputs from strain gauges, thermocouples, and RTDs in PLC analog input modules. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with offset trimming capability. Use Value: 0.15 mV typical input offset and ±13 V common-mode range enable accurate measurement despite ground shifts and EMI. |
| Active Filter Design | Data Acquisition System Front-End |
Use Scenario: Implementing 2nd- and 4th-order low-pass, high-pass, and band-pass filters in test equipment and medical devices. IC Role / Device Role / Timing Role: High-stability op-amp core for Sallen-Key and state-variable filter topologies. Use Value: 16 MHz GBW and 40° phase margin ensure predictable frequency response and minimal peaking in multi-pole designs. | Use Scenario: Buffering and level-shifting analog signals before ADC sampling in 16-bit+ data loggers and oscilloscopes. IC Role / Device Role / Timing Role: Unity-gain buffer and programmable-gain stage with low output impedance and fast settling. Use Value: ±14.1 V output swing into 10 kΩ and 7 V/µs slew rate support full-scale acquisition of ±10 V inputs with sub-µs settling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NE5532P | Higher input bias current (300 nA vs. 750 nA typ), slightly lower GBW (10 MHz), identical pinout and supply range | Better suited for very high-source-impedance audio circuits where bias current dominates noise | Select NE5532P if circuit uses >100 kΩ feedback networks and requires lower input current noise |
| OPA2134PA | FET-input architecture (2 pA IB), lower voltage noise (8 nV/√Hz), higher cost, SO-8 only, not PDIP-compatible | Preferred in ultra-high-impedance pH sensors or photodiode transimpedance stages where input current matters most | Choose OPA2134PA only when input bias current <10 pA is mandatory and PDIP packaging is not required |
Compared with NE5532P and OPA2134PA, the MC33078P offers superior voltage noise performance and wider supply tolerance (±18 V), making it optimal for general-purpose high-fidelity analog signal chains where bipolar characteristics and through-hole assembly are preferred.
Availability
MC33078P is available at Aetrix Electronics and suitable for professional audio equipment, industrial sensor interfaces, active filter modules, and data acquisition front-ends requiring stable component supply and long-term obsolescence management.
Supply support for MC33078P 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in precision op-amps and signal-chain innovation.
The MC33078P belongs to TI's legacy high-performance bipolar op-amp family, engineered specifically for demanding audio, instrumentation, and industrial control applications where low noise, high speed, and robust DC accuracy are essential.
FAQ
What is the maximum capacitive load the MC33078P can drive without oscillation?
The MC33078P remains stable with capacitive loads up to 590 pF when driving a 10 kΩ load, as verified in TI's pulse response characterization. For loads exceeding this, adding a 10–47 Ω series resistor between the output and capacitor restores stability. This behavior is documented in Figure 2 of the MC33078P datasheet under "Output Characteristics".
Does the MC33078P support single-supply operation?
Yes, the MC33078P supports single-supply operation - for example, with VCC+ = +30 V and VCC− = 0 V - provided the input common-mode voltage stays within ±13 V of the midpoint between supplies. However, its bipolar input stage performs best with symmetric dual supplies (e.g., ±15 V), and output swing is optimized for that configuration. The MC33078P datasheet specifies all key parameters under ±15 V conditions.
What is the input offset voltage drift over temperature for the MC33078P?
The MC33078P has a typical input offset voltage temperature coefficient (αVIO) of 2 µV/°C across –40°C to +85°C, as stated in the Electrical Characteristics table. This means the offset may drift by approximately ±120 µV over the full operating range - a critical factor in precision DC-coupled applications. The MC33078P's low drift supports stable long-term calibration in industrial sensor interfaces.
Is the MC33078P RoHS compliant?
Yes, the MC33078P is RoHS compliant, as confirmed in TI's Package Option Addendum (November 2025 revision). It features NiPdAu (NIPDAU) lead finish and meets JEDEC standards for hazardous substance restrictions. The MC33078P part marking and tube packaging documentation explicitly list "Yes" under the RoHS column for this orderable variant.
How does the MC33078P compare to the MC33078DR in terms of thermal performance?
The MC33078P (PDIP package) has a junction-to-air thermal resistance (θJA) of 85°C/W, significantly lower than the SOIC-packaged MC33078DR (97°C/W) and much better than the MSOP-packaged DGK variants (172°C/W). This makes the MC33078P more suitable for higher-power dissipation scenarios in through-hole prototypes and industrial PCBs where airflow is limited. All three share identical electrical specs, but thermal derating must be applied per package in the MC33078P datasheet's Absolute Maximum Ratings table.
MC33078P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 7V/µs
- Gain Bandwidth Product:
- 16 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 300 nA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 2.05mA (x2 Channels)
- Current - Output / Channel:
- 37 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MC33078P FAQ
1.How can I place an order for MC33078P through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33078P 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 MC33078P reliable?
The price and inventory of MC33078P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33078P is usually 5 days.
3.What payment methods are accepted for MC33078P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33078P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33078P?
MC33078P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33078P 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 MC33078P?
For technical support, including MC33078P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33078P requirements.
6.How does Aetrix verify that MC33078P is sourced from the original manufacturer or authorized distributors?
All MC33078P 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 MC33078P meets industry standards.
7.What is the process for return or replacement of MC33078P?
All MC33078P units undergo pre-shipment inspection (PSI). If there is an issue with MC33078P, 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 MC33078P part is unused and in its original packaging.
Return procedure for MC33078P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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