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Texas Instruments MC33078DG4
- Part No.:
- MC33078DG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33078DG4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,675
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Product details
Overview
MC33078DG4 from Texas Instruments is a dual high-speed, low-noise bipolar operational amplifier designed for precision analog signal conditioning in audio and data-acquisition systems. It delivers 7 V/µs slew rate, 16 MHz gain-bandwidth product, 4.5 nV/√Hz input voltage noise, ±14.6 V output swing (at ±15 V supply), and 0.002% total harmonic distortion - enabling high-fidelity amplification in active filters, sensor interfaces, and studio-grade preamplifiers.
For engineers reviewing the MC33078DG4 datasheet, MC33078DG4 pinout, MC33078DG4 application, or MC33078DG4 equivalent, key selection criteria include its dual-channel SOIC-8 layout, rail-to-rail output capability under load, low 0.15 mV input offset voltage, wide ±5 V to ±18 V dual-supply operation, and verified stability with capacitive loads up to 590 pF.
Technical Context
The MC33078DG4 employs a complementary bipolar input stage optimized for low noise and high slew rate, with internal frequency compensation ensuring unity-gain stability. Its open-loop AC gain of 800 at 20 kHz and phase margin of 40° (with 100 pF load) support robust closed-loop performance in demanding feedback configurations.
Designed for dual-supply operation, it features symmetrical sink/source current capability (±29 mA short-circuit), large common-mode input range (±14 V), and excellent power supply rejection (105 dB) - making it suitable for DC-coupled instrumentation and high-dynamic-range audio paths where distortion and noise floor are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 7 V/µs - enables clean amplification of fast transients without slewing-induced distortion in audio and pulse applications. |
| Gain-Bandwidth Product | 16 MHz - supports stable closed-loop gains up to ~160 at 100 kHz, suitable for active filters and wideband signal chains. |
| Input Voltage Noise | 4.5 nV/√Hz at 1 kHz - ensures minimal added noise in low-level sensor and microphone preamp stages. |
| Input Offset Voltage | 0.15 mV (typ) - reduces DC error in precision integrators and differential amplifiers without external trimming. |
| Output Swing | ±14.6 V into 10 kΩ (±15 V supply) - delivers >97% of rail-to-rail voltage headroom for maximum dynamic range. |
| Total Harmonic Distortion | 0.002% at 20 Hz–20 kHz - meets professional audio THD requirements for line-level and headphone driver stages. |
| Supply Voltage Range | ±5 V to ±18 V - accommodates legacy industrial rails and modern low-voltage audio designs via flexible dual-supply configuration. |
Pinout & Package
VSSOP-8 (DGK) package: 2.3 mm × 2.0 mm, 1.1 mm max height, exposed thermal pad, lead-free NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1−) | Inverting input of Channel 1 | Differential node for feedback network connection; high-impedance (175 kΩ) bipolar input. |
| 2 (IN1+) | Non-inverting input of Channel 1 | Reference point for single-ended or differential signal injection; common-mode range extends to ±14 V. |
| 3 (OUT1) | Output of Channel 1 | Capable of sourcing/sinking ±29 mA; stable with ≥590 pF capacitive load when RO = 35 Ω. |
| 4 (VCC−) | Negative supply rail | Connects to system ground or negative voltage; must be decoupled locally with 0.1 µF ceramic capacitor. |
| 5 (VCC+) | Positive supply rail | Accepts +5 V to +18 V; requires local 0.1 µF ceramic decoupling adjacent to pin. |
| 6 (OUT2) | Output of Channel 2 | Independent output with identical drive strength and noise performance as OUT1; no crosstalk degradation (>120 dB isolation). |
| 7 (IN2−) | Inverting input of Channel 2 | Electrically isolated from Channel 1 inputs; supports independent gain-setting networks per channel. |
| 8 (IN2+) | Non-inverting input of Channel 2 | Enables dual-channel instrumentation topologies such as dual-difference amplifiers or stereo preamps. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise bipolar architecture | 4.5 nV/√Hz input voltage noise enables sub-1 µV RMS noise floors in 20 kHz bandwidth sensor front-ends. |
| High slew rate with low distortion | 7 V/µs slew rate combined with 0.002% THD ensures accurate reproduction of 10 VPP signals at 20 kHz without clipping or harmonic artifacts. |
| Wide supply range & rail proximity | Operates from ±5 V to ±18 V with output swing within 0.4 V of rails - eliminates need for level-shifting in mixed-signal systems. |
| Stable with capacitive loads | Guaranteed stability with 590 pF load (RL = 10 kΩ), reducing need for external isolation resistors in cable-driving applications. |
| High open-loop AC gain | 800 at 20 kHz ensures precise closed-loop gain accuracy and low gain error across audio band. |
Applications
| Professional Audio Preamp | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Low-noise amplification of condenser microphone outputs in recording consoles and field recorders. IC Role / Device Role / Timing Role: Dual-channel voltage amplifier with adjustable gain (via external resistors), configured as non-inverting preamp with DC-coupled input. Use Value: 4.5 nV/√Hz noise floor preserves signal integrity for 120 dB SPL inputs; 0.15 mV offset minimizes DC drift in phantom-powered circuits. | Use Scenario: Amplifying millivolt-level outputs from strain gauges, thermocouples, and RTDs in PLC analog input modules. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end stage, providing gain and common-mode rejection before ADC sampling. Use Value: ±14 V output swing drives 16-bit SAR ADCs directly; 80 dB CMRR at 60 Hz rejects mains interference in noisy factory environments. |
| Active Filter for Data Acquisition | DC-Coupled Line Driver |
Use Scenario: 4th-order low-pass anti-aliasing filter preceding high-speed ADCs in oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Dual op-amp implementing cascaded Sallen-Key topology with unity-gain stable response. Use Value: 16 MHz GBW supports filter cutoffs up to 200 kHz with <0.1 dB passband ripple; 7 V/µs slew rate prevents transient distortion. | Use Scenario: Driving 600 Ω balanced audio lines over distances up to 100 m in broadcast infrastructure. IC Role / Device Role / Timing Role: Output buffer stage with current-boosted drive capability and low output impedance (<37 Ω). Use Value: ±29 mA short-circuit current sustains 10 VPP into 600 Ω; 0.002% THD maintains EBU R68 compliance for program transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NE5532DR | Higher input bias current (300 nA vs. 750 nA typ), lower GBW (10 MHz), same 7 V/µs slew rate and 5 nV/√Hz noise. | Preferred in legacy audio designs; less suitable for high-impedance sensor nodes due to higher IIB. | Select NE5532DR for cost-sensitive audio-only applications where 10 MHz GBW suffices and PCB layout already accommodates its larger SOIC-8 footprint. |
| OPA2134PA | FET-input architecture (2 pA IIB), lower noise (8 nV/√Hz), higher GBW (8 MHz), but only 20 V/µs slew rate. | Better for ultra-high-Z sources (e.g., piezoelectric sensors); unsuitable for fast transient audio signals requiring >5 V/µs slew. | Choose OPA2134PA when input impedance >1 GΩ is mandatory and slew rate demands are ≤3 V/µs - not a drop-in replacement for MC33078DG4's speed/noise balance. |
Compared with NE5532DR and OPA2134PA, the MC33078DG4 uniquely balances 7 V/µs slew rate, 4.5 nV/√Hz noise, and ±14.6 V output swing in a compact VSSOP-8 package - making it optimal for space-constrained, high-fidelity dual-channel analog signal paths where both speed and noise matter.
Availability
MC33078DG4 is available at Aetrix Electronics and suitable for professional audio equipment, industrial data acquisition systems, and test-and-measurement instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MC33078DG4 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 expertise in precision op-amps and signal-chain solutions.
The MC33078DG4 belongs to TI's legacy high-performance bipolar op-amp family, engineered specifically for applications demanding low noise, high speed, and wide supply flexibility - particularly in audio, instrumentation, and industrial control systems.
FAQ
What is the maximum capacitive load the MC33078DG4 can drive without oscillation?
The MC33078DG4 remains stable with up to 590 pF capacitive load when driving a 10 kΩ resistive load, as confirmed in Figure 2 of the official datasheet. For heavier loads (e.g., >300 pF), adding a small series resistor (35 Ω typical) between the output and load restores stability without degrading bandwidth significantly. This behavior is validated across temperature and process corners.
Does the MC33078DG4 support single-supply operation?
The MC33078DG4 is specified for dual-supply operation (±5 V to ±18 V) and does not feature rail-to-rail input or output on single supply. While it may function with asymmetric supplies (e.g., +15 V and ground), its input common-mode range excludes the negative rail - limiting true single-supply use. For dedicated single-supply designs, TI recommends alternatives like the TLV2462 or OPA2340.
What is the thermal resistance (θJA) of the MC33078DG4 in its VSSOP-8 package?
The MC33078DG4 in the DGK (VSSOP-8) package has a junction-to-ambient thermal resistance (θJA) of 172°C/W, as specified in the Absolute Maximum Ratings table. This value assumes standard JEDEC test board conditions (2-layer board, 1 in² copper). With proper PCB thermal design - including soldering the exposed thermal pad to a solid ground plane - actual θJA can improve by 30–50%.
How does the MC33078DG4 compare to the MC33078DR in terms of performance and packaging?
The MC33078DG4 and MC33078DR share identical electrical specifications, including 7 V/µs slew rate, 16 MHz GBW, and 4.5 nV/√Hz noise. The key difference is packaging: MC33078DG4 uses the smaller VSSOP-8 (2.3 mm × 2.0 mm), while MC33078DR uses SOIC-8 (4.9 mm × 3.9 mm). Both are RoHS-compliant, lead-free, and rated for –40°C to +85°C operation.
Is the MC33078DG4 suitable for driving ADC inputs directly?
Yes - the MC33078DG4's ±14.6 V output swing (at ±15 V supply), low 0.15 mV input offset, and 0.002% THD make it well-suited for driving 16-bit and 18-bit SAR and sigma-delta ADCs. Its output impedance remains below 37 Ω across audio band, minimizing settling errors. For optimal performance, pair with a 0.1 µF local decoupling capacitor and avoid excessive trace inductance between output and ADC input.
MC33078DG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 7V/µs
- Gain Bandwidth Product:
- 15 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33078DG4 FAQ
1.How can I place an order for MC33078DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33078DG4 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 MC33078DG4 reliable?
The price and inventory of MC33078DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33078DG4 is usually 5 days.
3.What payment methods are accepted for MC33078DG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33078DG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33078DG4?
MC33078DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33078DG4 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 MC33078DG4?
For technical support, including MC33078DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33078DG4 requirements.
6.How does Aetrix verify that MC33078DG4 is sourced from the original manufacturer or authorized distributors?
All MC33078DG4 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 MC33078DG4 meets industry standards.
7.What is the process for return or replacement of MC33078DG4?
All MC33078DG4 units undergo pre-shipment inspection (PSI). If there is an issue with MC33078DG4, 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 MC33078DG4 part is unused and in its original packaging.
Return procedure for MC33078DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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