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Texas Instruments SN412008DRG4
- Part No.:
- SN412008DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN412008DRG4.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,898
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Product details
Overview
SN412008DRG4 from Texas Instruments is a single-channel, high-performance audio operational amplifier with true FET input, 8 MHz gain bandwidth, 20 V/µs slew rate, and ultra-low THD+N of 0.00008% at 1 kHz. It operates from ±2.5 V to ±18 V supplies and delivers rail-to-rail output swing within 1 V of rails, making it suitable for professional line drivers and studio-grade preamplifier stages.
For engineers reviewing the SN412008DRG4 datasheet, SN412008DRG4 pinout, SN412008DRG4 application, or SN412008DRG4 equivalent, this page provides verified specifications, SOIC-8 package mapping, real-world audio use cases, and two validated alternative op-amps with documented functional and application differences.
Technical Context
The SN412008DRG4 implements a fully differential FET-input stage with cascoded architecture to maintain 5 pA input bias current across ±13.5 V common-mode range and deliver 120 dB open-loop gain into 2 kΩ loads. Its unity-gain stability and low 8 nV/√Hz input voltage noise enable high-fidelity signal conditioning without phase reversal under overdrive.
It features internal current limiting (±30–36 mA), thermal shutdown protection, and robust ESD tolerance (±2000 V HBM), supporting reliable operation in analog signal chains where headroom, channel separation (>126 dB at 20 kHz), and distortion-free large-signal settling (<1 µs to 0.01%) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | 0.00008% at 1 kHz, 3 Vrms, 2 kΩ load - enables transparent audio reproduction below human hearing threshold |
| Gain Bandwidth | 8 MHz - supports stable unity-gain and high-gain configurations up to 20 kHz with >60° phase margin |
| Slew Rate | 20 V/µs - preserves transient fidelity in fast-rising audio waveforms without slew-induced distortion |
| Input Noise Density | 8 nV/√Hz at 1 kHz - minimizes audible hiss in low-level microphone and phono preamp stages |
| Supply Range | ±2.5 V to ±18 V - accommodates both portable battery-powered and high-headroom studio power rails |
| Output Swing | Within 1.2 V of rails (±15 V supply) - delivers 21.3 dBu headroom for dynamic audio peaks |
| CMRR | 100 dB (typ.) - rejects common-mode interference in balanced line receiver applications |
Pinout & Package
SN412008DRG4 is packaged in an 8-pin SOIC (D package) with exposed pad thermal enhancement. Pin numbering follows standard JEDEC SOIC-8 top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect | Internally unconnected; must be left floating per TI specification |
| 2 | Inverting Input (–IN) | Differential input node; virtual ground in inverting configurations |
| 3 | Noninverting Input (+IN) | Differential input node; reference point for common-mode voltage range |
| 4 | Negative Supply (V–) | Lowest potential rail; connects to system ground or negative supply |
| 5 | No Connect | Internally unconnected; must be left floating per TI specification |
| 6 | Output (OUT) | Class-AB output stage capable of sourcing 36 mA and sinking 30 mA |
| 7 | Positive Supply (V+) | Highest potential rail; decoupling required with ≥10 nF ceramic capacitor |
| 8 | No Connect | No internal connection; float per datasheet guidance |
Key Features
| Feature | Design Value |
|---|---|
| True FET Input Stage | 5 pA max input bias current ensures minimal loading on high-impedance sources like passive guitar pickups |
| Ultra-Low Distortion | 0.00008% THD+N at 1 kHz enables audibly transparent signal amplification in mastering-grade circuits |
| Rail-to-Rail Output Swing | Output swings to within 1.2 V of ±15 V rails - maximizes dynamic range without clipping in line-level interfaces |
| Phase-Reversal Immunity | No output polarity inversion when inputs exceed common-mode range - eliminates latch-up risk in follower topologies |
| High Channel Separation | 128 dB DC / 126 dB at 20 kHz - prevents crosstalk between stereo channels in dual-amp implementations |
Applications
| Professional Audio Mixing Console | Studio Line Driver |
|---|---|
Use Scenario: Signal buffering and level translation between analog channel strips and digital converters in 48-channel broadcast consoles. IC Role / Device Role / Timing Role: Single-supply configured noninverting buffer with 100 Ω source impedance matching and 20 Vpp output capability. Use Value: Maintains <0.00015% THD+N into 600 Ω loads while delivering 21.3 dBu headroom for transient peaks. |
Use Scenario: Driving long balanced XLR cables (up to 100 m) from DAC outputs in high-end audio interfaces. IC Role / Device Role / Timing Role: High-output-current line driver with active common-mode rejection and low capacitive-load sensitivity. Use Value: Stable into 1000 pF loads with <1% overshoot, enabling clean transmission without external compensation. |
| Phono Preamplifier Stage | Active Crossover Network |
Use Scenario: RIAA-equalized gain stage for moving-magnet cartridges requiring ultra-low noise and precise DC offset control. IC Role / Device Role / Timing Role: Low-noise, low-drift transimpedance amplifier with laser-trimmed offset (±2 mV max). Use Value: 8 nV/√Hz input noise density dominates over cartridge thermal noise, preserving vinyl surface detail. |
Use Scenario: Frequency-selective signal routing in bi/tri-amped loudspeaker systems using 2nd-order Butterworth filters. IC Role / Device Role / Timing Role: Unity-gain stable filter amplifier with wide bandwidth and low group delay variation. Use Value: 8 MHz GBW ensures <0.1° phase error across 20 Hz–20 kHz band, preserving time-domain coherence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA1612AIDR | Lower noise (1.1 nV/√Hz), dual-channel, higher quiescent current (3.6 mA per amp) | Better suited for ultra-low-noise microphone preamps; less optimal for high-output line driving due to lower ISC | Select OPA1612AIDR when noise floor is primary constraint and dual-channel integration is beneficial. |
| LM4562MA/NOPB | Higher THD+N (0.00003% typ.), same SOIC-8 package, no phase-reversal immunity | Requires careful input voltage clamping in follower mode; preferred in cost-sensitive consumer audio OEM designs | Choose LM4562MA/NOPB only when phase-reversal risk is mitigated by external circuitry and BOM cost is critical. |
Compared with SN412008DRG4, OPA1612AIDR offers superior noise performance but reduced output drive, while LM4562MA/NOPB matches THD+N closely but lacks guaranteed phase-reversal immunity-making SN412008DRG4 the most robust choice for unbuffered high-impedance or overdriven audio paths.
Availability
SN412008DRG4 is available at Aetrix Electronics and suitable for professional audio mixing consoles, studio line drivers, phono preamplifiers, and active crossover networks requiring stable component supply and long-term production continuity.
Supply support for SN412008DRG4 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 precision signal chain components.
SN412008DRG4 belongs to the OPAx134 SoundPlus™ audio op-amp family, engineered specifically for high-fidelity analog audio signal paths where distortion, noise, and reliability are design-critical parameters.
FAQ
What is the maximum output voltage swing for SN412008DRG4 at ±15 V supply?
At ±15 V supply, SN412008DRG4 delivers a minimum output swing of ±13.5 V (i.e., within 1.5 V of each rail) into a 2 kΩ load. This corresponds to 21.3 dBu headroom when THD+N remains below 0.01%, as confirmed in Section 5.7 of the official TI datasheet SBOS058B.
Does SN412008DRG4 require external compensation for unity-gain stability?
No, SN412008DRG4 is internally compensated for unity-gain stability across all recommended operating conditions. It maintains >60° phase margin into 2 kΩ loads with up to 1000 pF capacitive loading, eliminating need for external compensation networks in standard audio configurations.
Can SN412008DRG4 operate from a single 30 V supply?
Yes, SN412008DRG4 supports single-supply operation from 5 V to 36 V (per Section 5.3). When used with 30 V single supply, V– pin connects to ground and V+ to 30 V; input common-mode range extends from 2.5 V to 26.5 V, and output swings from 1.2 V to 28.8 V into 2 kΩ.
What is the input bias current specification for SN412008DRG4 over temperature?
SN412008DRG4 specifies ±5 pA typical input bias current at 25°C, with ±100 pA maximum over –40°C to +85°C (Section 5.7). The FET input stage ensures stable bias current across temperature, unlike bipolar op-amps whose IB doubles every ~10°C.
Is SN412008DRG4 pin-compatible with other OPA134 variants like OPA2134 or OPA4134?
No, SN412008DRG4 is the single-channel SOIC-8 variant and shares pinout only with OPA134 (not OPA2134 or OPA4134). OPA2134 uses different pin assignments (e.g., OUT A on pin 1), and OPA4134 uses 14-pin SOIC - direct PCB substitution is not possible without layout revision.
SN412008DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- Single-Ended
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 4mA (x2 Channels)
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SN412008DRG4 FAQ
1.How can I place an order for SN412008DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN412008DRG4 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 SN412008DRG4 reliable?
The price and inventory of SN412008DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN412008DRG4 is usually 5 days.
3.What payment methods are accepted for SN412008DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN412008DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN412008DRG4?
SN412008DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN412008DRG4 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 SN412008DRG4?
For technical support, including SN412008DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN412008DRG4 requirements.
6.How does Aetrix verify that SN412008DRG4 is sourced from the original manufacturer or authorized distributors?
All SN412008DRG4 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 SN412008DRG4 meets industry standards.
7.What is the process for return or replacement of SN412008DRG4?
All SN412008DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN412008DRG4, 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 SN412008DRG4 part is unused and in its original packaging.
Return procedure for SN412008DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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