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Texas Instruments MC33078DGKR
- Part No.:
- MC33078DGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MC33078DGKR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,753
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Product details
Overview
MC33078DGKR 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 MC33078DGKR datasheet, MC33078DGKR pinout, MC33078DGKR application, or MC33078DGKR equivalent, key selection criteria include low-noise performance at audio frequencies, rail-to-rail output swing capability under 2-kΩ load, thermal stability across –40°C to 85°C, and compatibility with MSOP-8 PCB layouts requiring minimal board area.
Technical Context
The MC33078DGKR implements a complementary bipolar input stage with symmetrical sink/source output drive, supporting wide common-mode input range (±13 V) and large output voltage swing (±14.6 V at 10-kΩ load). Its unity-gain-stable architecture features 40° phase margin with 100-pF capacitive load and exhibits <0.15 mV typical input offset voltage with 2 µV/°C drift.
Designed for dual-supply systems, it operates from ±5 V to ±18 V with supply current of 2.5 mA per channel at 25°C. The device maintains stable AC gain (≥85 dB at 20 kHz) and high CMRR (≥80 dB) across temperature, making it suitable for DC-coupled transducer interfaces and active filter stages where linearity and dynamic range are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 7 V/µs - enables faithful reproduction of fast transient signals up to ~1 MHz without slew-induced distortion |
| Gain Bandwidth Product | 16 MHz - supports stable closed-loop gain ≥10 at 1.6 MHz or ≥100 at 160 kHz |
| Input Voltage Noise | 4.5 nV/√Hz at 1 kHz - critical for low-level sensor signal amplification with minimal added noise |
| Input Offset Voltage | 0.15 mV typ - ensures ≤1.5 mV error in 10-V full-scale measurement systems |
| Total Harmonic Distortion | 0.002% at 3 Vrms, 20 Hz–20 kHz - meets high-fidelity audio requirements |
| Supply Voltage Range | ±5 V to ±18 V - accommodates industrial ±12 V and audio ±15 V rails without level-shifting |
| Output Voltage Swing | ±14.6 V at 10-kΩ load - delivers >97% of rail-to-rail swing for maximum dynamic range |
Pinout & Package
VSSOP-8 (DGK) package: 3.0 mm × 3.0 mm body, 0.65 mm lead pitch, 1.1 mm max height, exposed pad for thermal enhancement. Pin 1 located in Q1 quadrant per JEDEC MO-187.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Drives external load; capable of ±29 mA source/sink into short circuit |
| 2 (IN1−) | Inverting input, Amp 1 | Differential node for feedback network; high-impedance (175 kΩ) bipolar input |
| 3 (IN1+) | Non-inverting input, Amp 1 | Reference or signal input node; supports common-mode range to within 1.4 V of rails |
| 4 (VCC−) | Negative supply rail | Return path for internal biasing; must be decoupled locally to minimize PSRR degradation |
| 5 (VCC+) | Positive supply rail | Primary power connection; requires 0.1-µF ceramic decoupling adjacent to pin |
| 6 (OUT2) | Amplifier 2 output | Independent output stage; identical electrical specs to OUT1 |
| 7 (IN2−) | Inverting input, Amp 2 | Second differential pair input; electrically isolated from Amp 1 except via shared supplies |
| 8 (IN2+) | Non-inverting input, Amp 2 | Second signal input; amp-to-amp isolation >120 dB prevents crosstalk in dual-channel designs |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise bipolar input stage | 4.5 nV/√Hz + 0.5 pA/√Hz enables sub-µV signal recovery in microphone preamps and strain-gauge bridges |
| Symmetrical output drive | ±29 mA short-circuit current ensures matched rise/fall times and minimal crossover distortion in Class-AB output stages |
| High open-loop AC gain | 800 at 20 kHz (≥54 dB) maintains loop gain for precision integrators and active filters operating near bandwidth limit |
| Large output voltage swing | ±14.6 V at 10-kΩ load preserves signal headroom in ±15 V systems without clipping |
| Excellent phase/gain margins | 40° phase margin and –6 dB gain margin at 100-pF load ensure stability without external compensation in most configurations |
Applications
| Professional Audio Mixer Channel | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Dual-channel line-level amplification with selectable gain and tone control before ADC sampling. IC Role / Device Role / Timing Role: Dual op-amp provides independent non-inverting gain stages (Amp 1 = mic preamp, Amp 2 = line buffer) with shared ±15 V rails. Use Value: 0.002% THD preserves harmonic integrity; 4.5 nV/√Hz noise floor avoids masking low-level instrument harmonics. | Use Scenario: Amplifying millivolt-level outputs from RTDs and load cells in PLC analog input modules. IC Role / Device Role / Timing Role: Instrumentation-grade dual amplifier implements 3-op-amp INA topology (Amp 1/2 = input buffers, Amp 3 = difference stage). Use Value: 0.15 mV offset and 2 µV/°C drift minimize temperature-induced measurement error in 0.1°C-accurate systems. |
| Active Crossover Network | Medical ECG Front-End |
Use Scenario: Splitting full-range audio into low/mid/high bands using 2nd-order Sallen-Key filters. IC Role / Device Role / Timing Role: Each MC33078DGKR channel implements one filter section (LPF/HPF) with unity-gain stability and low group delay variation. Use Value: 16 MHz GBW supports filter cutoffs up to 200 kHz with <0.1 dB passband ripple; 7 V/µs slew prevents transient overshoot. | Use Scenario: Biopotential amplification with right-leg drive and 50/60 Hz notch filtering in portable ECG monitors. IC Role / Device Role / Timing Role: Dual op-amp configures as high-CMRR instrumentation amplifier (Amp 1/2 = input buffers) and active notch stage (Amp 2). Use Value: 80 dB min CMRR rejects mains interference; ±14.6 V swing accommodates 5-mV ECG peaks with 1000× gain before saturation. |
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 quiescent current (8 mA/ch), higher noise (5 nV/√Hz), same GBW (10 MHz) | Optimized for professional audio; less suitable for battery-powered sensor nodes due to power draw | Select NE5532DR when absolute lowest THD (<0.0005%) is required and supply current is not constrained |
| OPA2134PA | FET-input (50 fA IB), lower noise (8 nV/√Hz), lower slew rate (20 V/µs), rail-to-rail output | Better for high-impedance sources (e.g., piezoelectric sensors); unsuitable for driving low-Z loads like 600-Ω audio lines | Select OPA2134PA when interfacing with >1-MΩ source impedances or requiring ultra-low input bias current |
Compared with NE5532DR and OPA2134PA, the MC33078DGKR offers optimal balance of low noise (4.5 nV/√Hz), high slew rate (7 V/µs), and moderate supply current (2.5 mA/ch), making it ideal for space-constrained industrial analog front-ends where both precision and drive capability matter.
Availability
MC33078DGKR is available at Aetrix Electronics and suitable for professional audio equipment, industrial PLC analog I/O modules, active filter designs, and medical biopotential acquisition systems requiring stable component supply and long-term manufacturability.
Supply support for MC33078DGKR 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 over 90 years of innovation in high-reliability analog IC design.
The MC33078DGKR belongs to TI's legacy high-performance op-amp family, engineered specifically for demanding analog signal chains in audio, test equipment, and industrial measurement where low noise, speed, and DC precision intersect.
FAQ
What is the maximum capacitive load the MC33078DGKR can drive without oscillation?
The MC33078DGKR remains stable with up to 380 pF load capacitance when driving a 600-Ω load, 560 pF with a 2-kΩ load, and 590 pF with a 10-kΩ load. For loads exceeding these values, adding a small series resistor (e.g., 10–50 Ω) between the output and capacitive load restores stability by isolating the pole.
Does the MC33078DGKR support single-supply operation?
The MC33078DGKR is specified for dual-supply operation from ±5 V to ±18 V. While it can function with asymmetric supplies (e.g., +15 V / 0 V), its input common-mode range extends only to within ~1.4 V of each rail, and output swing does not reach ground - making true single-supply use impractical without level-shifting circuitry.
What is the thermal resistance (θJA) of the MC33078DGKR in its VSSOP-8 package?
The MC33078DGKR in the DGK (VSSOP-8) package has a junction-to-air thermal resistance (θJA) of 172°C/W, as specified in the Absolute Maximum Ratings table. This value assumes standard JEDEC test conditions (single-layer board, no copper pour); actual θJA improves significantly with PCB copper heatsinking under the exposed pad.
How does the MC33078DGKR's input offset voltage drift with temperature?
The MC33078DGKR exhibits an input offset voltage temperature coefficient (αVIO) of 2 µV/°C over the full –40°C to +85°C range. At 25°C, typical VIO is 0.15 mV; this increases by ~210 µV over a 105°C span, resulting in worst-case offset of ~0.36 mV at temperature extremes.
Is the MC33078DGKR RoHS compliant and what is its moisture sensitivity level?
Yes, the MC33078DGKR is RoHS compliant (lead-free, NIPDAU finish) and rated MSL Level-1 (unlimited floor life) at 260°C peak reflow temperature, per JEDEC J-STD-020. This allows standard SMT assembly without baking or special handling prior to reflow.
MC33078DGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- 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:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
MC33078DGKR FAQ
1.How can I place an order for MC33078DGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33078DGKR 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 MC33078DGKR reliable?
The price and inventory of MC33078DGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33078DGKR is usually 5 days.
3.What payment methods are accepted for MC33078DGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33078DGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33078DGKR?
MC33078DGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33078DGKR 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 MC33078DGKR?
For technical support, including MC33078DGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33078DGKR requirements.
6.How does Aetrix verify that MC33078DGKR is sourced from the original manufacturer or authorized distributors?
All MC33078DGKR 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 MC33078DGKR meets industry standards.
7.What is the process for return or replacement of MC33078DGKR?
All MC33078DGKR units undergo pre-shipment inspection (PSI). If there is an issue with MC33078DGKR, 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 MC33078DGKR part is unused and in its original packaging.
Return procedure for MC33078DGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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