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Texas Instruments OPA1662AIDGK
- Part No.:
- OPA1662AIDGK
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA1662AIDGK.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:885
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Product details
Overview
OPA1662AIDGK from Texas Instruments is a dual-channel, bipolar-input audio operational amplifier optimized for high-fidelity signal conditioning in low-noise, low-distortion applications. It delivers 3.3nV/√Hz input voltage noise density, 0.00006% THD+N at 1kHz, 17V/μs slew rate, and rail-to-rail output swing within 600mV of supply rails into 2kΩ - enabling wide dynamic range in USB audio interfaces and portable recording systems.
For engineers reviewing the OPA1662AIDGK datasheet, OPA1662AIDGK pinout, OPA1662AIDGK application, or OPA1662AIDGK equivalent, this page provides verified technical context, package-specific pin definitions, real-world audio system use cases, and validated alternative options for precision analog signal path design.
Technical Context
The OPA1662AIDGK employs a fully differential, bipolar-input front-end with independent channel circuitry to achieve –120dB channel separation at 1kHz and eliminate crosstalk-induced intermodulation in multi-channel audio stages. Its unity-gain stable architecture supports G = +1 to +10 configurations without external compensation.
It operates across ±1.5V to ±18V (or 3V–36V) supplies while maintaining 1.5mA per channel quiescent current, enabling battery-powered and line-powered designs alike. The device's 22MHz gain-bandwidth product and 2.7MHz full-power bandwidth support wideband audio processing up to 20kHz with headroom for transient fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise density | 3.3nV/√Hz at 1kHz - enables sub-10μVpp integrated noise in 20Hz–20kHz audio band with low-source-impedance sensors. |
| THD+N | 0.00006% at 1kHz, 3VRMS - meets professional audio distortion requirements (<–124dB) without post-filtering. |
| Slew rate | 17V/μs - supports clean 20kHz sine wave reproduction at ≥10V peak without slew-induced distortion. |
| Rail-to-rail output | Swings to within 600mV of V+ and V− into 2kΩ - maximizes usable output voltage swing and dynamic range in single-supply or split-supply systems. |
| Supply range | ±1.5V to ±18V or 3V to 36V - accommodates portable (±2.5V), automotive (12V/24V), and studio-grade (±15V) power architectures. |
| Quiescent current | 1.5mA per channel - allows dual-channel operation under 3.3V or 5V rails with minimal thermal load in compact PCB layouts. |
| Channel separation | –120dB at 1kHz - ensures isolated left/right signal paths in stereo preamps and mixer summing nodes. |
Pinout & Package
VSSOP-8 (DGK) package: ultra-thin, surface-mount 8-pin package with 0.65mm pitch, optimized for space-constrained audio PCBs and high-density layout routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Channel A output | Drives loads up to ±30mA; rail-to-rail swing supports direct connection to ADC inputs or headphone drivers. |
| 2 (–IN A) | Channel A inverting input | Differential pair input node; protected by back-to-back diodes limiting differential input voltage to ±0.6V. |
| 3 (+IN A) | Channel A non-inverting input | High-impedance (600MΩ || 2.5pF) input for sensor buffering or reference-level signal routing. |
| 4 (V–) | Negative supply rail | Accepts –1.5V to –18V; must be decoupled with 0.1μF capacitor near pin for low-noise performance. |
| 5 (+IN B) | Channel B non-inverting input | Independent from Channel A; no shared bias network ensures zero interaction during overload or clipping. |
| 6 (–IN B) | Channel B inverting input | Matches Pin 2 electrical behavior; enables matched dual-path filtering or differential drive topologies. |
| 7 (OUT B) | Channel B output | Identical drive capability to Pin 1; supports stereo line driver or dual-mono microphone preamp configurations. |
| 8 (V+) | Positive supply rail | Accepts +1.5V to +18V; asymmetric supply operation (e.g., +25V/–5V) is supported within absolute max ratings. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise bipolar input stage | 3.3nV/√Hz noise density enables <1μVpp integrated noise in 20Hz–20kHz band with source impedances <1kΩ. |
| Ultra-low THD+N | 0.00006% at 1kHz ensures distortion remains below audible threshold even at full-scale output in high-end DAC output stages. |
| Rail-to-rail output swing | Output reaches within 600mV of both supply rails into 2kΩ, preserving >95% of theoretical dynamic range in ±5V systems. |
| Independent channel architecture | Zero shared circuitry between channels eliminates crosstalk-induced IMD in stereo summing amplifiers or dual ADC drivers. |
| Wide supply flexibility | Operates from ±1.5V to ±18V or 3V–36V - supports single-ended 3.3V portable gear and symmetrical ±15V studio equipment on same BOM. |
Applications
| USB Audio Interface | Analog Mixer Channel Strip |
|---|---|
Use Scenario: Low-latency, high-resolution audio streaming from PC/Mac to external DAC via USB 2.0 interface with integrated headphone amp. IC Role / Device Role / Timing Role: Dual-channel line driver and headphone buffer; each OPA1662AIDGK channel handles left/right signal path with independent gain control. Use Value: 3.3nV/√Hz noise and 0.00006% THD+N preserve 120dB SNR and 24-bit resolution end-to-end without post-processing. |
Use Scenario: Discrete analog channel strip in 16-channel live sound mixer with mic preamp, EQ, and line-level output stage. IC Role / Device Role / Timing Role: Dual op amp implements active filter sections (high-pass, parametric EQ) and final line driver before bus summing. Use Value: –120dB channel separation prevents bleed between adjacent channels; rail-to-rail output drives 600Ω pro-audio lines without level loss. |
| Portable Recording System | High-End Car Audio DSP Front-End |
Use Scenario: Battery-powered field recorder with XLR mic inputs, 24-bit ADC, and stereo line-out to headphones or external recorder. IC Role / Device Role / Timing Role: Dual OPA1662AIDGK serves as mic preamp gain stage and line-level output buffer in same VSSOP-8 footprint. Use Value: 1.5mA per channel quiescent current extends battery life; ±1.5V minimum supply enables operation from single Li-ion cell with boost converter. |
Use Scenario: OEM premium car audio head unit with 8-channel DSP, balanced line outputs, and integrated 4×50W amplifier. IC Role / Device Role / Timing Role: Dual op amp conditions analog signals before ADC sampling and after DAC reconstruction in multi-zone audio distribution. Use Value: 36V max supply rating withstands automotive load-dump transients; 22MHz GBW supports ultrasonic noise shaping in Class-D gate drive paths. |
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 (1.1nV/√Hz), higher IQ (3.6mA/ch), SOIC-8 only - requires more board area and power budget. | Better suited for ultra-low-noise microphone preamps where 1.1nV/√Hz justifies 2.4× higher current draw. | Select OPA1612AIDR only when noise dominates over power constraints and SOIC-8 is acceptable. |
| NE5532DR | Higher noise (5nV/√Hz), higher THD+N (0.002%), 8mA/ch IQ - legacy bipolar design with proven reliability but inferior audio specs. | Used in cost-sensitive consumer audio where 0.002% THD+N is acceptable and thermal margin is ample. | Choose NE5532DR only for legacy redesigns or price-driven BOMs where 12dB noise penalty is tolerable. |
Compared with OPA1662AIDGK, OPA1612AIDR offers superior noise performance at the expense of doubled quiescent current and larger SOIC-8 footprint, while NE5532DR trades 12dB higher noise and 33× higher distortion for broader availability and lower unit cost in non-critical audio paths.
Availability
OPA1662AIDGK is available at Aetrix Electronics and suitable for USB audio interfaces, analog mixers, and portable recording systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for OPA1662AIDGK 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 audio signal chain solutions.
The OPA166x series was designed specifically for high-end audio applications demanding ultra-low noise, vanishingly low distortion, and rail-to-rail output swing - targeting professional recording gear, premium consumer audio, and automotive infotainment systems.
FAQ
What is the maximum capacitive load the OPA1662AIDGK can drive stably?
The OPA1662AIDGK is characterized for stable operation with up to 200pF capacitive load in unity-gain configuration. Figure 5-25 shows overshoot remains below 10% at CL = 200pF with RS = 0Ω. For loads exceeding 200pF, external isolation resistor (e.g., 10–50Ω in series with output) is recommended to maintain phase margin above 45°.
Does the OPA1662AIDGK support single-supply operation?
Yes, the OPA1662AIDGK supports true single-supply operation from 3V to 36V. Its input common-mode range extends to (V–) + 0.5V and (V+) – 1V, and rail-to-rail output swing enables full-scale signal handling with mid-rail biasing - ideal for 3.3V or 5V portable audio systems.
What is the thermal resistance (RθJA) of the OPA1662AIDGK in VSSOP-8 package?
The OPA1662AIDGK in DGK (VSSOP-8) package has a junction-to-ambient thermal resistance (RθJA) of 225.4°C/W, as specified in Section 5.4 of the datasheet. This value assumes JEDEC-standard 2-layer board with 1in² copper pour; actual board layout significantly impacts thermal performance.
How does the OPA1662AIDGK handle input overvoltage conditions?
The OPA1662AIDGK features internal back-to-back diodes between its inputs, limiting differential input voltage to ±0.6V. If fast-ramping signals exceed this, input current must be limited to ≤10mA using series resistors - otherwise, forward-biased diodes may cause distortion or latch-up in G = +1 configurations.
Is the OPA1662AIDGK pin-compatible with other dual op amps in VSSOP-8?
No - the OPA1662AIDGK uses a non-standard pinout optimized for audio layout: Pins 1/7 are outputs, Pins 2/6 are inverting inputs, Pins 3/5 are non-inverting inputs, and Pins 4/8 are supplies. It is not pin-compatible with generic dual op amps like LMV358 or TLV2372 in VSSOP-8.
OPA1662AIDGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 17V/µs
- Gain Bandwidth Product:
- 22 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 600 nA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 1.5mA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA1662AIDGK FAQ
1.How can I place an order for OPA1662AIDGK through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA1662AIDGK 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 OPA1662AIDGK reliable?
The price and inventory of OPA1662AIDGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA1662AIDGK is usually 5 days.
3.What payment methods are accepted for OPA1662AIDGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA1662AIDGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA1662AIDGK?
OPA1662AIDGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA1662AIDGK 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 OPA1662AIDGK?
For technical support, including OPA1662AIDGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA1662AIDGK requirements.
6.How does Aetrix verify that OPA1662AIDGK is sourced from the original manufacturer or authorized distributors?
All OPA1662AIDGK 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 OPA1662AIDGK meets industry standards.
7.What is the process for return or replacement of OPA1662AIDGK?
All OPA1662AIDGK units undergo pre-shipment inspection (PSI). If there is an issue with OPA1662AIDGK, 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 OPA1662AIDGK part is unused and in its original packaging.
Return procedure for OPA1662AIDGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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