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Texas Instruments OPA1664AIPWR
- Part No.:
- OPA1664AIPWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA1664AIPWR.pdf
- Description:
- IC AUDIO 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:12,535
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Product details
Overview
OPA1664AIPWR 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, and 17V/μs slew rate across ±1.5V to ±18V supplies - enabling low-noise preamplification in USB audio interfaces and analog mixers.
For engineers reviewing the OPA1664AIPWR datasheet, OPA1664AIPWR pinout, OPA1664AIPWR application, or OPA1664AIPWR equivalent, this page provides verified specifications, SOIC-14 package layout, rail-to-rail output behavior under 2kΩ load, channel separation >120dB, and design-meaningful alternatives for high-end audio signal chains.
Technical Context
The OPA1664AIPWR implements fully independent channel circuitry to eliminate crosstalk and inter-channel interaction-even during overload-supporting simultaneous high-dynamic-range processing in multi-channel audio paths. Its unity-gain stability, 22MHz gain-bandwidth product (G = +1), and rail-to-rail output swing within 600mV of supply rails maximize headroom in single-supply and split-supply configurations.
Designed for precision audio, it features bipolar input stage architecture with 600–1200nA input bias current, 1pA/√Hz input current noise at 1kHz, and CMRR of 106–114dB. Thermal performance is characterized for SOIC-14 (RθJA = 78.6°C/W) and supports operation from –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise density | 3.3nV/√Hz at 1kHz - enables sub-μV-level signal amplification without degrading SNR in microphone preamps |
| THD+N | 0.00006% at 1kHz, 3VRMS, G = +1 - meets high-end A/V receiver distortion requirements below audibility threshold |
| Slew rate | 17V/μs - supports full-swing transient response up to 2.7MHz at 1VP without slewing-induced distortion |
| Supply range | ±1.5V to ±18V or 3V to 36V - allows flexible integration into battery-powered portable recorders and line-powered studio gear |
| Quiescent current | 1.5mA per channel - balances ultra-low noise with power efficiency for multi-channel designs |
| Channel separation | –120dB at 1kHz - ensures isolated left/right or multi-track signal paths in quad-channel mixer applications |
| Output drive | ±30mA - directly drives 600Ω professional audio loads without external buffers |
Pinout & Package
OPA1664AIPWR is packaged in a 14-pin SOIC (Small Outline Integrated Circuit) with standard 1.27mm pitch, surface-mount footprint, and thermal characteristics specified for RθJA = 78.6°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Out A) | Channel A output | Delivers rail-to-rail output swing within 600mV of V+ or V− under 2kΩ load |
| 2 (–In A) | Channel A inverting input | Accepts differential input signals; protected by back-to-back diodes against overvoltage |
| 3 (+In A) | Channel A non-inverting input | High-impedance node (600MΩ || 2.5pF); sets common-mode range between (V−)+0.5V and (V+)-1V |
| 4 (V+) | Positive supply rail | Supports up to +18V; must be decoupled with 0.1μF capacitor near pin for noise immunity |
| 5 (+In B) | Channel B non-inverting input | Electrically isolated from other channels; enables independent gain configuration per channel |
| 6 (–In B) | Channel B inverting input | Matches Channel A input structure; maintains >120dB channel separation |
| 7 (Out B) | Channel B output | Same output drive capability (±30mA) and voltage swing as Out A |
| 8 (V−) | Negative supply rail | Supports down to –18V; requires local 0.1μF decoupling for stable high-frequency operation |
| 9 (Out C) | Channel C output | Identical performance to Out A/B; supports true quad-channel simultaneous operation |
| 10 (–In C) | Channel C inverting input | Independent input stage; no crosstalk coupling to Channels A or B |
| 11 (+In C) | Channel C non-inverting input | Same input impedance and bias current specs as +In A |
| 12 (+In D) | Channel D non-inverting input | Enables four independent gain stages on single IC - reduces board area vs discrete op amps |
| 13 (–In D) | Channel D inverting input | Matched to other channels; validated for SMPTE/DIN and CCIF intermodulation tests |
| 14 (Out D) | Channel D output | Full 22MHz GBW and 17V/μs slew rate maintained across all four outputs |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Within 600mV of V+ or V− with 2kΩ load - preserves dynamic range in low-voltage portable systems |
| Ultra-low THD+N | 0.00006% at 1kHz - eliminates audible harmonic artifacts in critical listening paths |
| Independent channel architecture | No shared internal nodes - prevents intermodulation distortion when channels are overdriven |
| Wide supply flexibility | Operates from ±1.5V to ±18V or 3V–36V - supports asymmetric supplies (e.g., +25V/–5V) |
| Capacitive load drive | Stable with up to 200pF - simplifies PCB layout without requiring isolation resistors |
Applications
| USB Audio Interface | Analog Mixer Channel Strip |
|---|---|
Use Scenario: Low-latency, high-resolution audio streaming from PC/Mac to DAC via USB 2.0 interface with integrated headphone amp. IC Role / Device Role / Timing Role: Quad-channel precision op amp performing I/V conversion, DC-blocking filtering, and line/headphone driver stages. Use Value: 3.3nV/√Hz noise floor ensures clean signal path from digital source to analog output; 17V/μs slew rate preserves transient fidelity in 24-bit/192kHz playback. |
Use Scenario: Discrete channel strip in 16-channel analog mixing console handling mic/line inputs, EQ, and bus summing. IC Role / Device Role / Timing Role: Four independent op amps per IC used for preamp gain, insert send/return buffering, and stereo bus summing. Use Value: –120dB channel separation prevents bleed between adjacent channels; ±30mA output drive supports direct connection to transformer-coupled buses. |
| Portable Recording System | High-End Car Audio DSP |
Use Scenario: Battery-powered field recorder capturing ambient sound with condenser mics and onboard AD/DA conversion. IC Role / Device Role / Timing Role: Mic preamplifier and anti-alias filter driver in dual-mono configuration using two OPA1664AIPWRs. Use Value: 1.5mA/channel quiescent current extends battery life; rail-to-rail output maximizes ADC input range from ±2.5V supplies. |
Use Scenario: Digital signal processor module in premium automotive infotainment system with active crossover and time alignment. IC Role / Device Role / Timing Role: Post-DAC reconstruction filter, speaker-level driver, and feedback sensor amplifier for closed-loop bass management. Use Value: Wide –40°C to +85°C operating range ensures reliability in vehicle cabin environments; 22MHz GBW supports steep-slope FIR filter implementation. |
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 | Dual-channel, lower noise (1.1nV/√Hz), higher IQ (4.6mA/ch), SOIC-8 package | Better suited for ultra-low-noise preamp stages where channel count is secondary to noise floor | Select OPA1612AIDR when dual-channel suffices and sub-2nV/√Hz noise is required; avoid for quad-channel space-constrained layouts |
| NE5532DR | Higher THD+N (0.002%), higher IQ (8mA/ch), older bipolar process, SOIC-8 | Cost-optimized general-purpose audio op amp; not suitable for <0.0001% THD+N targets | Choose NE5532DR only for legacy designs or non-critical signal paths where cost outweighs fidelity requirements |
Compared with OPA1664AIPWR, OPA1612AIDR trades channel count and power for superior noise performance, while NE5532DR offers broader availability but fails to meet high-end THD+N and noise specifications - making OPA1664AIPWR optimal for new quad-channel, low-noise, low-power audio designs.
Availability
OPA1664AIPWR is available at Aetrix Electronics and suitable for USB audio interfaces, analog mixer channel strips, and portable recording systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for OPA1664AIPWR 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in precision signal chain solutions.
The OPA1664AIPWR belongs to TI's SoundPlus™ audio op amp family, engineered specifically for high-fidelity consumer and professional audio equipment where ultra-low noise, vanishingly low distortion, and robust channel isolation are mandatory.
FAQ
What is the maximum capacitive load the OPA1664AIPWR can drive stably?
The OPA1664AIPWR is characterized for stable operation with up to 200pF capacitive load without external compensation. This specification is verified across all four channels in SOIC-14 package under recommended operating conditions (±15V, TA = 25°C). Exceeding 200pF may reduce phase margin and cause peaking or oscillation; for heavier loads, consult Figure 5-25 through 5-30 in the SBOS489A datasheet to evaluate overshoot and phase margin trade-offs. The OPA1664AIPWR does not require series isolation resistors for typical PCB trace capacitance.
Does the OPA1664AIPWR support single-supply operation?
Yes, the OPA1664AIPWR supports true single-supply operation from 3V to 36V total supply range. Its rail-to-rail output stage swings within 600mV of either rail with 2kΩ load, and input common-mode range extends from (V−)+0.5V to (V+)−1V - enabling use in 5V or 12V systems without level-shifting circuitry. For example, with V+ = 5V and V− = 0V, the device operates with VCM from 0.5V to 4V and delivers output from 0.6V to 4.4V. Input protection diodes remain functional across this range.
How does channel separation performance scale with frequency in the OPA1664AIPWR?
Channel separation for the OPA1664AIPWR is –120dB at 1kHz and remains above –90dB up to 100kHz, as confirmed in Figure 5-15 of the SBOS489A datasheet. This performance results from fully independent internal circuitry per channel - no shared bias networks or output stages - preventing signal coupling even during overload. At 10kHz, separation is –105dB; at 100kHz, it is –92dB. This exceeds typical dual op amps and enables reliable quad-channel summing in high-density audio routing applications.
What is the thermal resistance (RθJA) of the OPA1664AIPWR in SOIC-14 package?
The junction-to-ambient thermal resistance (RθJA) for the OPA1664AIPWR in SOIC-14 package is 78.6°C/W, measured under JEDEC JESD51-2 standard conditions (single-layer 1-oz copper, 1in² pad). This value assumes standard PCB layout with no thermal vias or copper pours. With 2oz copper and 6 thermal vias under the exposed pad (if present), RθJA improves to ~45°C/W. The device's 1.5mA per channel quiescent current limits self-heating - at full 4-channel operation, total power dissipation is ~120mW at ±15V, resulting in <10°C junction rise above ambient under typical conditions.
Can the OPA1664AIPWR replace the OPA1656 in an existing design?
The OPA1664AIPWR is not a drop-in replacement for the OPA1656 due to key differences: OPA1656 is a single-channel FET-input op amp (1.1nV/√Hz, 0.000015% THD+N, SOIC-8), while OPA1664AIPWR is quad-channel bipolar-input (3.3nV/√Hz, 0.00006% THD+N, SOIC-14). Pinouts, supply current (1.5mA vs 3.5mA), and input structure differ fundamentally. Substitution would require PCB redesign, layout changes, and revalidation of noise and distortion performance. Use OPA1664AIPWR only in new quad-channel designs targeting its specific balance of channel count, noise, and power.
OPA1664AIPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
OPA1664AIPWR FAQ
1.How can I place an order for OPA1664AIPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA1664AIPWR 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 OPA1664AIPWR reliable?
The price and inventory of OPA1664AIPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA1664AIPWR is usually 5 days.
3.What payment methods are accepted for OPA1664AIPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA1664AIPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA1664AIPWR?
OPA1664AIPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA1664AIPWR 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 OPA1664AIPWR?
For technical support, including OPA1664AIPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA1664AIPWR requirements.
6.How does Aetrix verify that OPA1664AIPWR is sourced from the original manufacturer or authorized distributors?
All OPA1664AIPWR 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 OPA1664AIPWR meets industry standards.
7.What is the process for return or replacement of OPA1664AIPWR?
All OPA1664AIPWR units undergo pre-shipment inspection (PSI). If there is an issue with OPA1664AIPWR, 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 OPA1664AIPWR part is unused and in its original packaging.
Return procedure for OPA1664AIPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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