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Texas Instruments MC33078DGKRG4
- Part No.:
- MC33078DGKRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MC33078DGKRG4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,740
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Product details
Overview
MC33078DGKRG4 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 professional audio preamps and sensor front-ends.
For engineers reviewing the MC33078DGKRG4 datasheet, MC33078DGKRG4 pinout, MC33078DGKRG4 application, or MC33078DGKRG4 equivalent, key selection criteria include its MSOP-8 package thermal performance (θJA = 172°C/W), rail-to-rail output swing capability (±14.6 V at 10 kΩ), and verified stability with capacitive loads up to 590 pF - critical for low-distortion analog signal chains.
Technical Context
The MC33078DGKRG4 employs a complementary bipolar input stage optimized for low noise and wide common-mode range (±14 V), paired with a high-slew-rate Class AB output stage delivering symmetrical sink/source current (±37 mA). Its open-loop AC gain of 800 at 20 kHz and phase margin of 40° at 100 pF ensure stable unity-gain operation without external compensation.
It operates across –40°C to +85°C with supply voltages from ±5 V to ±18 V, supporting both single-ended and differential configurations. The device exhibits excellent power supply rejection (105 dB) and common-mode rejection (100 dB), making it suitable for noisy industrial environments where signal integrity must be preserved amid supply ripple or ground shifts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 7 V/µs - enables clean amplification of fast transients in audio and instrumentation signals without slew-induced distortion. |
| Gain Bandwidth Product | 16 MHz - supports stable closed-loop gains up to 100× at 160 kHz, suitable for active filters and wideband sensor interfaces. | Input Voltage Noise | 4.5 nV/√Hz at 1 kHz - ensures minimal added noise in low-level microphone or piezoelectric sensor amplification. |
| Output Voltage Swing | ±14.6 V into 10 kΩ - maximizes dynamic range in ±15 V systems, reducing headroom loss and clipping risk. |
| Total Harmonic Distortion | 0.002% at 3 Vrms, 20 Hz–20 kHz - meets THD requirements for studio-grade audio line drivers and ADC front-ends. |
| Common-Mode Input Range | ±14 V - allows direct interfacing with sensors operating near supply rails without level-shifting circuitry. |
| Supply Voltage Range | ±5 V to ±18 V - provides design flexibility across legacy industrial rails and modern low-noise analog supplies. |
Pinout & Package
VSSOP-8 (DGK) package: 3.0 mm × 3.0 mm body, 1.1 mm max height, 0.65 mm pitch, exposed thermal pad for enhanced power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1−) | Inverting input, Channel 1 | Differential node for feedback configuration; requires matched trace routing to minimize noise pickup. |
| 2 (IN1+) | Non-inverting input, Channel 1 | High-impedance node (175 kΩ differential resistance); sensitive to PCB leakage and EMI coupling. |
| 3 (OUT1) | Output, Channel 1 | Capable of ±37 mA short-circuit current; stable with ≥590 pF load capacitance when driving 10 kΩ. |
| 4 (VCC−) | Negative supply rail | Must be decoupled with 0.1 µF ceramic capacitor placed ≤2 mm from pin to reduce PSRR degradation. |
| 5 (VCC+) | Positive supply rail | Shared rail for both amplifiers; requires independent 0.1 µF + 10 µF bulk decoupling per channel. |
| 6 (OUT2) | Output, Channel 2 | Independent output with identical drive strength and noise performance; supports dual-path signal processing. |
| 7 (IN2−) | Inverting input, Channel 2 | Electrically isolated from Channel 1 inputs; amp-to-amp isolation >120 dB prevents crosstalk in stereo or differential pairs. |
| 8 (IN2+) | Non-inverting input, Channel 2 | Same input bias current (750 nA typ) and offset voltage drift (2 µV/°C) as Channel 1 for matched performance. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise bipolar architecture | 4.5 nV/√Hz input voltage noise enables sub-10 µV RMS noise floors in 20 kHz bandwidth sensor amplifiers. |
| High slew rate + wide GBW | 7 V/µs slew rate and 16 MHz GBW support 100× gain at 160 kHz - sufficient for anti-aliasing filters before 200 kSPS ADCs. |
| Large symmetrical output swing | ±14.6 V swing into 10 kΩ preserves >97% of ±15 V rail utilization, minimizing need for gain staging or level shifting. |
| Stable with capacitive loads | Guaranteed stability with 590 pF load at 10 kΩ - eliminates need for isolation resistors in cable-driving applications. |
| High PSRR and CMRR | 105 dB PSRR and 100 dB CMRR maintain signal fidelity in mixed-signal systems with shared power/ground planes. |
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 instrumentation amplifier providing 40 dB gain with <0.002% THD and 110 dB SNR. Use Value: 4.5 nV/√Hz noise floor ensures microphone self-noise dominates system noise, preserving acoustic detail. | Use Scenario: Amplifying millivolt-level outputs from strain gauges and thermocouples in PLC analog input modules. IC Role / Device Role / Timing Role: Precision dual op-amp configured as differential input stage with programmable gain and offset correction. Use Value: ±14 V output swing into 2 kΩ enables full-scale use of 16-bit ADC reference ranges without additional buffering. |
| Medical ECG Front-End | Test & Measurement Instrumentation |
Use Scenario: Biopotential signal amplification in portable ECG devices requiring high CMRR and low 1/f noise. IC Role / Device Role / Timing Role: First-stage amplifier in 3-op-amp instrumentation topology, rejecting 50/60 Hz interference. Use Value: 100 dB CMRR and 0.15 mV input offset voltage minimize baseline wander and improve diagnostic accuracy. | Use Scenario: Active filtering and signal reconstruction in benchtop oscilloscopes and arbitrary waveform generators. IC Role / Device Role / Timing Role: Unity-gain buffer and 2nd-order Sallen-Key filter driver with 16 MHz bandwidth. Use Value: 7 V/µs slew rate prevents distortion on 10 VPP 100 kHz square waves, maintaining edge fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NE5532DR | Higher input bias current (800 nA vs. 750 nA), lower GBW (10 MHz), same 4.5 nV/√Hz noise. | Optimized for cost-sensitive consumer audio; less suitable for precision DC-coupled sensor interfaces due to higher offset drift. | Select NE5532DR only when budget constraints outweigh need for extended bandwidth and tighter DC specs. |
| OPA2134PA | FET-input architecture (2 pA IIB), lower noise current (0.1 pA/√Hz), but higher voltage noise (8 nV/√Hz). | Better for high-impedance sources (>1 MΩ); inferior for low-Z microphone or bridge sensor applications where voltage noise dominates. | Choose OPA2134PA for photodiode or piezoelectric charge amplifiers; avoid for low-impedance audio paths. |
Compared with NE5532DR and OPA2134PA, the MC33078DGKRG4 uniquely balances ultra-low voltage noise, high slew rate, and wide supply range - making it optimal for dual-channel, ±15 V-powered audio and precision analog systems where both AC fidelity and DC accuracy matter.
Availability
MC33078DGKRG4 is available at Aetrix Electronics and suitable for professional audio equipment, industrial sensor interfaces, medical instrumentation, and test & measurement hardware requiring stable component supply across long production lifecycles.
Supply support for MC33078DGKRG4 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 ICs.
The MC33078DGKRG4 belongs to TI's precision bipolar op-amp product line, engineered specifically for high-fidelity audio, industrial sensing, and medical signal acquisition where low noise, wide bandwidth, and rail-compatible output swing are essential.
FAQ
What is the maximum load capacitance the MC33078DGKRG4 can drive without oscillation?
The MC33078DGKRG4 maintains stability with up to 590 pF of capacitive load when driving a 10 kΩ resistor, as verified in TI's Application Information section. For heavier loads, adding a 10–47 Ω series resistor between the output and load restores phase margin. This behavior is consistent across all temperature ranges specified for the MC33078DGKRG4.
Does the MC33078DGKRG4 support single-supply operation?
Yes, the MC33078DGKRG4 supports single-supply operation from 10 V to 36 V (VCC+ to GND), provided the input common-mode range (±14 V relative to midpoint) and output swing limitations are respected. Designers must bias inputs within the valid common-mode window and avoid rail saturation - a requirement explicitly validated for the MC33078DGKRG4 in TI's recommended operating conditions.
What is the thermal resistance (θJA) of the MC33078DGKRG4 in its VSSOP-8 package?
The MC33078DGKRG4 has a junction-to-ambient thermal resistance (θJA) of 172°C/W in the DGK (VSSOP-8) package, as specified in TI's Absolute Maximum Ratings table. This value assumes standard JEDEC 2-layer board conditions; actual performance improves with PCB copper pour under the exposed thermal pad, a feature confirmed in the MC33078DGKRG4 package outline documentation.
How does the input offset voltage of the MC33078DGKRG4 vary with temperature?
The MC33078DGKRG4 exhibits an input offset voltage temperature coefficient (αVIO) of 2 µV/°C over –40°C to +85°C, with typical VIO = 0.15 mV at 25°C and max 3 mV across the full temperature range. This drift behavior is measured and guaranteed per TI's Electrical Characteristics table, ensuring predictable DC error accumulation in precision integrators or long-term sensor monitoring using the MC33078DGKRG4.
Is the MC33078DGKRG4 RoHS compliant and lead-free?
Yes, the MC33078DGKRG4 is RoHS compliant and features NiPdAu (NIPDAU) lead finish, as documented in TI's Packaging Information addendum. Its MSL rating is Level-1-260°C-UNLIM, confirming suitability for standard Pb-free reflow processes - a specification formally assigned to the MC33078DGKRG4 part number by Texas Instruments.
MC33078DGKRG4 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:
- Obsolete
- 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
MC33078DGKRG4 FAQ
1.How can I place an order for MC33078DGKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33078DGKRG4 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 MC33078DGKRG4 reliable?
The price and inventory of MC33078DGKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33078DGKRG4 is usually 5 days.
3.What payment methods are accepted for MC33078DGKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33078DGKRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33078DGKRG4?
MC33078DGKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33078DGKRG4 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 MC33078DGKRG4?
For technical support, including MC33078DGKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33078DGKRG4 requirements.
6.How does Aetrix verify that MC33078DGKRG4 is sourced from the original manufacturer or authorized distributors?
All MC33078DGKRG4 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 MC33078DGKRG4 meets industry standards.
7.What is the process for return or replacement of MC33078DGKRG4?
All MC33078DGKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with MC33078DGKRG4, 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 MC33078DGKRG4 part is unused and in its original packaging.
Return procedure for MC33078DGKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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