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Texas Instruments OPA1664AIPW
- Part No.:
- OPA1664AIPW
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA1664AIPW.pdf
- Description:
- IC AUDIO 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:132
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Product details
Overview
OPA1664AIPW from Texas Instruments is a quad-channel, bipolar-input audio operational amplifier optimized for high-fidelity signal conditioning. 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 low-noise, low-distortion preamplification in USB audio interfaces and high-end A/V receivers.
For engineers reviewing the OPA1664AIPW datasheet, OPA1664AIPW pinout, OPA1664AIPW application, or OPA1664AIPW equivalent, key selection criteria include its ±1.5V to ±18V dual-supply operation, unity-gain stability, channel separation of –120dB at 1kHz, and TSSOP-14 package compatibility with space-constrained PCB layouts for portable recording systems and audio effects processors.
Technical Context
The OPA1664AIPW implements a fully independent per-channel architecture with no shared biasing or signal paths, ensuring minimal crosstalk even under overload conditions. Its bipolar input stage provides low input bias current (600–1200nA) and high open-loop gain (106–114dB), while the output stage drives ±30mA with rail-to-rail swing capability.
It operates across –40°C to +85°C with stable performance at supply voltages as low as ±1.5V (3V total) and up to ±18V (36V total), supporting asymmetric supplies (e.g., +25V/–5V). The device is unity-gain stable and maintains 22MHz gain-bandwidth product (G = +1) with 1μs overload recovery time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise density | 3.3nV/√Hz at 1kHz - enables clean amplification of low-level microphone or phono signals without audible hiss |
| THD+N | 0.00006% at 1kHz, 3VRMS - meets high-resolution audio requirements (≥120dB SNR) in premium DAC output stages |
| Slew rate | 17V/μs - supports full-scale transient response up to 2.7MHz at 1VP output, preserving audio transients |
| Supply range | ±1.5V to ±18V - allows flexible power design in battery-powered portables and line-powered A/V receivers |
| Quiescent current | 1.5mA per channel - enables quad-channel operation at <6mA total, suitable for thermally constrained enclosures |
| Channel separation | –120dB at 1kHz - prevents inter-channel leakage in stereo/quadraphonic mixing and surround-sound decoding |
| Output drive | ±30mA - directly drives 600Ω professional audio loads or multiple downstream op amps without buffering |
Pinout & Package
TSSOP-14 package (PW suffix), 5.0mm × 6.4mm footprint, 0.65mm pitch, exposed thermal pad (not electrically connected), rated for –40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - rail-to-rail capable, drives 2kΩ load to within 600mV of V+ or V– |
| 2 | –IN A | Inverting input for Channel A - differential pair input node with 600MΩ||2.5pF common-mode impedance |
| 3 | +IN A | Non-inverting input for Channel A - matched to –IN A for <2mV offset and >106dB CMRR |
| 4 | V+ | Positive supply rail - accepts up to +18V; decoupling capacitor required at pin |
| 5 | +IN B | Non-inverting input for Channel B - fully isolated circuitry prevents interaction with Channel A |
| 6 | –IN B | Inverting input for Channel B - identical bias and noise characteristics as Channel A inputs |
| 7 | OUT B | Amplifier B output - independent output stage with same drive and swing specs as OUT A |
| 8 | V– | Negative supply rail - accepts down to –18V; requires local 0.1μF ceramic decoupling |
| 9 | OUT C | Amplifier C output - third channel with identical AC/DC specs and thermal independence |
| 10 | –IN C | Inverting input for Channel C - no shared nodes with A/B channels ensures –120dB channel separation |
| 11 | +IN C | Non-inverting input for Channel C - matched input structure enables precise multi-channel gain matching |
| 12 | +IN D | Non-inverting input for Channel D - fourth channel completes quad configuration for 4.0/5.1 surround or multi-track monitoring |
| 13 | –IN D | Inverting input for Channel D - supports individual feedback networks per channel without interaction |
| 14 | OUT D | Amplifier D output - enables discrete channel processing in analog mixers and studio monitor controllers |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range by swinging to within 600mV of either supply rail into 2kΩ, maximizing headroom in single-supply or split-supply audio chains |
| Ultra-low distortion | 0.00006% THD+N at 1kHz enables transparent signal reproduction in high-end DAC output stages and mastering-grade analog summing |
| Independent channel architecture | Eliminates crosstalk-induced imaging artifacts in multi-channel applications like 5.1 surround decoding and stereo headphone amplifiers |
| Wide supply flexibility | Operates from ±1.5V to ±18V with asymmetric support (e.g., +25V/–5V), simplifying integration into legacy and modern audio power domains |
| Unity-gain stability | Guarantees stable operation without external compensation in buffer, inverter, and gain-of-one configurations common in line-level signal routing |
Applications
| USB Audio Interface | Analog Mixer |
|---|---|
Use Scenario: Low-latency, high-resolution audio streaming between PC and external DAC/ADC via USB 2.0, requiring clean analog front-end amplification before ADC sampling. IC Role / Device Role / Timing Role: OPA1664AIPW serves as quad-channel microphone preamplifier and line-input buffer, conditioning analog signals prior to 24-bit/192kHz ADC conversion. Use Value: 3.3nV/√Hz noise floor preserves signal integrity from condenser mics; 0.00006% THD+N ensures bit-perfect capture without harmonic contamination. | Use Scenario: Professional analog mixing console with 16-channel input strip, each requiring gain staging, EQ buffering, and summing bus drive. IC Role / Device Role / Timing Role: OPA1664AIPW implements four independent channel strips per IC - handling preamp gain, EQ I/O buffering, and subgroup summing amplification. Use Value: –120dB channel separation prevents bleed between adjacent channels; ±30mA output drive sustains low-impedance summing bus loading without distortion. |
| Portable Recording System | High-End Car Audio |
Use Scenario: Battery-powered field recorder capturing live acoustic performances with four XLR inputs, requiring low power consumption and thermal stability. IC Role / Device Role / Timing Role: OPA1664AIPW functions as quad mic preamp and headphone driver, operating from ±3.3V supplies derived from Li-ion battery regulation. Use Value: 1.5mA per channel quiescent current enables >10-hour runtime; rail-to-rail output delivers full 2VRMS to 32Ω headphones without clipping. | Use Scenario: Premium automotive infotainment system with 8-channel amplifier input stage, demanding EMI resilience and wide temperature tolerance. IC Role / Device Role / Timing Role: OPA1664AIPW buffers DSP outputs to power amplifier inputs, rejecting alternator ripple and maintaining fidelity across –40°C to +85°C cabin environments. Use Value: 114dB PSRR rejects supply noise; –40°C to +85°C rating ensures reliability in under-dash mounting; TSSOP-14 fits compact amplifier PCBs. |
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), dual-channel only, higher IQ (4.3mA/ch), SOIC-8 package | Better suited for ultra-low-noise microphone preamps where channel count is ≤2 and board space permits larger SOIC | Select OPA1612AIDR when absolute lowest noise is critical and quad-channel integration is unnecessary |
| LM4562MAX | Higher THD+N (0.00007%), dual-channel, SOIC-8, no rail-to-rail output (clips 1.5V from rails) | Legacy audio design with existing SOIC footprints and moderate noise budgets; lacks rail-to-rail swing for low-voltage portable use | Choose LM4562MAX for cost-sensitive dual-channel designs where 1.5V output headroom is acceptable |
Compared with OPA1664AIPW, OPA1612AIDR offers superior noise performance but sacrifices channel density and power efficiency, while LM4562MAX provides proven reliability in dual-channel line drivers but cannot match rail-to-rail output or quad integration for space-constrained multi-channel systems.
Availability
OPA1664AIPW is available at Aetrix Electronics and suitable for USB audio interfaces, analog mixers, and portable recording systems requiring stable component supply, long-term manufacturability, and consistent electrical performance across production batches.
Supply support for OPA1664AIPW 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 amplifiers and audio signal chain solutions.
The OPA166x series was designed specifically for high-fidelity audio applications demanding ultra-low noise, ultra-low distortion, and robust DC precision - targeting professional audio equipment, studio monitors, and premium consumer A/V systems.
FAQ
What is the maximum capacitive load the OPA1664AIPW can drive while maintaining stability?
The OPA1664AIPW is characterized to drive up to 200pF capacitive load while maintaining phase margin >45° and minimal overshoot. For loads exceeding 200pF, external isolation resistance (e.g., 10–50Ω in series with the output) is recommended to preserve stability without degrading audio bandwidth.
Does the OPA1664AIPW support single-supply operation?
Yes, the OPA1664AIPW supports true single-supply operation from 3V to 36V total supply range. When operated from a single 5V or 12V rail, the input common-mode range extends from (V–)+0.5V to (V+)–1V, and the output swings to within 600mV of each rail into 2kΩ, enabling use in 3.3V or 5V audio signal chains.
How does the OPA1664AIPW handle input overvoltage conditions?
The OPA1664AIPW features internal back-to-back diodes between inputs, providing ±0.5V differential overvoltage protection. If input differential voltage exceeds this, current must be limited to ≤10mA using series resistors - otherwise, permanent damage may occur. This protection is not intended for continuous clamp operation.
What is the thermal performance of the OPA1664AIPW in TSSOP-14 package?
In the PW (TSSOP-14) package, the OPA1664AIPW has a junction-to-ambient thermal resistance (RθJA) of 125.8°C/W and junction-to-board (RθJB) of 57.5°C/W. At 6mA total quiescent current and 25°C ambient, junction temperature rise is ~76°C - well within the 150°C absolute max, provided adequate PCB copper area is used for heat dissipation.
Can the OPA1664AIPW replace the OPA1654 in an existing design?
Yes, the OPA1664AIPW is pin-compatible with the OPA1654 in TSSOP-14 and shares identical pinout, supply range, and quiescent current. However, OPA1664AIPW improves noise (3.3nV/√Hz vs 4.3nV/√Hz) and THD+N (0.00006% vs 0.00008%), making it a direct performance upgrade without layout changes.
OPA1664AIPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 4
- 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 (x4 Channels)
- Current - Output / Channel:
- 50 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:
- 14-TSSOP
OPA1664AIPW FAQ
1.How can I place an order for OPA1664AIPW through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA1664AIPW 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 OPA1664AIPW reliable?
The price and inventory of OPA1664AIPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA1664AIPW is usually 5 days.
3.What payment methods are accepted for OPA1664AIPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA1664AIPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA1664AIPW?
OPA1664AIPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA1664AIPW 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 OPA1664AIPW?
For technical support, including OPA1664AIPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA1664AIPW requirements.
6.How does Aetrix verify that OPA1664AIPW is sourced from the original manufacturer or authorized distributors?
All OPA1664AIPW 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 OPA1664AIPW meets industry standards.
7.What is the process for return or replacement of OPA1664AIPW?
All OPA1664AIPW units undergo pre-shipment inspection (PSI). If there is an issue with OPA1664AIPW, 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 OPA1664AIPW part is unused and in its original packaging.
Return procedure for OPA1664AIPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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