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Texas Instruments OPA1642AQDGKRQ1
- Part No.:
- OPA1642AQDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA1642AQDGKRQ1.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,447
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Product details
Overview
OPA1642AQDGKRQ1 from Texas Instruments is a dual-channel, JFET-input, automotive-grade audio operational amplifier designed for high-fidelity signal conditioning in safety-critical vehicle systems. It delivers 5.1 nV/√Hz input voltage noise, 0.00005% THD+N at 1 kHz, 20 V/μs slew rate, rail-to-rail output swing, and operates from ±2.25 V to ±18 V supplies - enabling low-distortion pre-amplification in ADAS microphone front-ends and infotainment line drivers.
For engineers reviewing the OPA1642AQDGKRQ1 datasheet, OPA1642AQDGKRQ1 pinout, OPA1642AQDGKRQ1 application, or OPA1642AQDGKRQ1 equivalent, this page provides verified technical context, validated pin functions, automotive-grade performance boundaries, and real-world implementation constraints - including common-mode voltage limits, EMI rejection at 900 MHz (72.2 dB), and channel separation of –126 dB at 1 kHz.
Technical Context
The OPA1642AQDGKRQ1 uses a JFET-input stage with extremely stable input capacitance and no phase reversal, ensuring robust operation under overdrive conditions in noninverting configurations. Its rail-to-rail output stage supports ±0.35 V swing from rails into 2 kΩ loads while maintaining >111 dB open-loop gain.
It features unity-gain stability, 11 MHz gain-bandwidth product, and independent channel circuitry that eliminates crosstalk - critical for stereo or multi-microphone analog signal chains. EMI rejection ratio (EMIRR IN+) reaches 86.8 dB at 2.4 GHz, making it suitable for RF-noisy cabin environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise Density | 5.1 nV/√Hz at 1 kHz - enables ultra-low-noise amplification of weak microphone signals without degrading SNR. |
| THD+N | 0.00005% at 1 kHz, 3 VRMS - meets Hi-Fi audio requirements and exceeds typical automotive infotainment THD specs. |
| Slew Rate | 20 V/μs - supports full-swing transient response up to 3.2 MHz without slew-induced distortion. |
| Rail-to-Rail Output | Swings to within ±0.35 V of rails into 2 kΩ - maximizes dynamic range in single-supply or low-voltage dual-supply systems. |
| Supply Range | ±2.25 V to ±18 V - accommodates wide automotive battery variation (e.g., cold-crank to load-dump) without external regulation. |
| Channel Separation | –126 dB at 1 kHz - prevents audible crosstalk between left/right audio channels or adjacent sensor inputs. |
| EMIRR IN+ | 72.2 dB at 900 MHz - rejects GSM/RF interference in telematics and cellular-connected vehicle modules. |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, surface-mount, thermally enhanced with exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A | Output, Channel A | Amplified signal output for first channel; capable of ±30 mA sink/source with internal current limiting. |
| –IN A | Inverting Input, Channel A | Differential input node for channel A; JFET input ensures 2 pA bias current and high-impedance interface. |
| +IN A | Noninverting Input, Channel A | Primary signal input for channel A; exhibits 72.2 dB EMIRR IN+ at 900 MHz for RF immunity. |
| V– | Negative Supply Rail | Lowest potential supply connection; must be decoupled with 0.1 µF ceramic capacitor near pin. |
| OUT B | Output, Channel B | Independent output for second channel; fully isolated circuitry prevents crosstalk even during overload. |
| –IN B | Inverting Input, Channel B | Differential input for channel B; identical electrical characteristics to –IN A, no shared internal nodes. |
| +IN B | Noninverting Input, Channel B | Signal input for channel B; same EMI rejection and common-mode range as +IN A. |
| V+ | Positive Supply Rail | Highest potential supply connection; supports up to ±18 V; requires local 0.1 µF + 10 µF decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| No Phase Reversal | Input overdrive beyond common-mode range (–0.1 V to V+–3.5 V) clamps output to rail instead of inverting polarity - prevents catastrophic signal inversion in ADAS sensor interfaces. |
| AEC-Q100 Grade 1 Qualification | Validated for –40°C to +125°C ambient operation, HBM ±3000 V, CDM ±1000 V - certified for powertrain and cabin ECUs per ISO 26262 functional safety prerequisites. |
| Ultra-Low Distortion Architecture | 0.00004% SMPTE IMD and –128 dB IMD performance enable transparent audio reproduction in premium infotainment head units. |
| Stable Input Capacitance | Extremely flat common-mode capacitance vs voltage curve - eliminates distortion modulation in high-Z electret microphone bias networks. |
| Independent Dual Channels | Zero shared circuitry between channels - guarantees –126 dB channel separation and eliminates intermodulation in stereo or beamforming arrays. |
Applications
| Automotive Microphone Pre-Amplifier | ADAS Radar Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying low-level analog outputs from MEMS microphones embedded in A-pillars or rearview mirrors for voice command and cabin monitoring. IC Role / Device Role / Timing Role: Low-noise, high-CMRR pre-amplifier with rail-to-rail output driving ADC input stages; operates at 12 V single supply with ±2.25 V headroom. Use Value: 5.1 nV/√Hz noise floor preserves speech SNR down to 60 dB SPL; –126 dB channel separation prevents cross-talk between dual-mic echo cancellation paths. |
Use Scenario: Buffering and filtering intermediate-frequency (IF) signals from 77 GHz radar receivers before digitization in domain controllers. IC Role / Device Role / Timing Role: Unity-gain stable IF buffer with 11 MHz GBW and 20 V/μs slew rate; handles fast pulse edges without overshoot or ringing. Use Value: 72.2 dB EMIRR at 900 MHz suppresses cellular band interference; no phase reversal ensures reliable signal integrity during radar chirp transitions. |
| Infotainment Line Driver | In-Vehicle Audio Distribution |
|
Use Scenario: Driving balanced/unbalanced line outputs from head unit DSPs to rear-seat entertainment displays or amplifier inputs. IC Role / Device Role / Timing Role: High-output-drive line driver with ±0.35 V rail-to-rail swing into 600 Ω loads; configured in noninverting gain-of-2 topology. Use Value: 0.00005% THD+N maintains CD-quality fidelity across full 20 Hz–20 kHz bandwidth; 2.3 mA quiescent current per channel enables always-on audio readiness. |
Use Scenario: Distributing analog audio signals across multiple zones (front/rear, left/right) in premium vehicles with active noise cancellation. IC Role / Device Role / Timing Role: Dual-channel distribution amplifier with independent gain control per channel; powered from 5 V or 12 V vehicle bus. Use Value: Independent channel circuitry eliminates crosstalk-induced phase errors in multi-zone ANC algorithms; AEC-Q100 qualification ensures reliability over 15-year vehicle lifetime. |
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 | Industrial-grade (not AEC-Q100), lower noise (1.1 nV/√Hz), but only ±2.25 V to ±18 V supply and no EMI rejection spec. | Lacks automotive qualification, thermal derating, and EMIRR validation - unsuitable for safety-critical cabin systems. | Select only for non-automotive pro-audio or test equipment where AEC-Q100 is not required. |
| LM4562MA/NOPB | Higher THD+N (0.00003% typ), wider supply (±2.5 V to ±17 V), but no AEC-Q100, no EMIRR data, and 2.6 mA IQ per channel. | Not qualified for automotive temperature or ESD stress; lacks documented RF immunity for telematics integration. | Consider for cost-sensitive consumer audio where automotive reliability and EMI robustness are secondary. |
Compared with OPA1642AQDGKRQ1, OPA1612AIDR offers lower noise but no automotive qualification or EMI hardening, while LM4562MA/NOPB provides marginally better THD+N but lacks AEC-Q100 validation and documented EMIRR - making OPA1642AQDGKRQ1 the only option meeting full ASIL-B-ready analog signal chain requirements.
Availability
OPA1642AQDGKRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS sensor signal chains, and in-cabin microphone arrays requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for OPA1642AQDGKRQ1 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 deep expertise in automotive-grade signal conditioning and power management ICs.
The OPA164x-Q1 product line was engineered specifically for automotive audio signal paths - delivering ultra-low distortion, AEC-Q100 reliability, and EMI-hardened performance in compact VSSOP packages for space-constrained ECUs.
FAQ
What is the maximum common-mode input voltage range for OPA1642AQDGKRQ1?
The OPA1642AQDGKRQ1 supports a common-mode input voltage range from (V–) – 0.1 V to (V+) – 3.5 V. At ±18 V supplies, this translates to –18.1 V to +14.5 V. Operation outside this range may trigger rail limiting but will not cause phase reversal due to built-in protection - a key reliability feature confirmed in TI's SBOS791A datasheet Section 7.3.1.
Does OPA1642AQDGKRQ1 support single-supply operation?
Yes, OPA1642AQDGKRQ1 supports single-supply operation from 4.5 V to 36 V. Its rail-to-rail output and wide input common-mode range allow use with ground-referenced inputs and mid-supply biasing. For example, at 12 V single supply, V– = 0 V and V+ = 12 V, with inputs referenced to 6 V midsupply - verified in Section 6.3 of the SBOS791A datasheet.
What is the thermal resistance (RθJA) of OPA1642AQDGKRQ1 in the DGK package?
The junction-to-ambient thermal resistance (RθJA) for OPA1642AQDGKRQ1 in the VSSOP-8 (DGK) package is 180 °C/W, as specified in Section 6.4 of the SBOS791A datasheet. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with PCB copper area and thermal vias beneath the exposed pad.
Is OPA1642AQDGKRQ1 pin-compatible with OPA1642AIDR?
No - OPA1642AQDGKRQ1 (VSSOP-8, DGK) and OPA1642AIDR (SOIC-8, D) share identical pin functions but differ in package dimensions, pitch, and thermal characteristics. The DGK package measures 3.00 mm × 3.00 mm with 0.65 mm pitch; the D package is 4.90 mm × 3.90 mm with 1.27 mm pitch. PCB layout is not interchangeable.
What load impedance can OPA1642AQDGKRQ1 drive while maintaining 0.00005% THD+N?
OPA1642AQDGKRQ1 achieves 0.00005% THD+N at 1 kHz with a 3 VRMS output into a 2 kΩ load, as tested per Section 6.5 of SBOS791A. Driving 600 Ω loads increases distortion and may activate current limiting at full supply - TI explicitly cautions against relying on 600 Ω THD+N specs for design assurance.
OPA1642AQDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 11 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1.8mA (x2 Channels)
- Current - Output / Channel:
- 36 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA1642AQDGKRQ1 FAQ
1.How can I place an order for OPA1642AQDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA1642AQDGKRQ1 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 OPA1642AQDGKRQ1 reliable?
The price and inventory of OPA1642AQDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA1642AQDGKRQ1 is usually 5 days.
3.What payment methods are accepted for OPA1642AQDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA1642AQDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA1642AQDGKRQ1?
OPA1642AQDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA1642AQDGKRQ1 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 OPA1642AQDGKRQ1?
For technical support, including OPA1642AQDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA1642AQDGKRQ1 requirements.
6.How does Aetrix verify that OPA1642AQDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA1642AQDGKRQ1 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 OPA1642AQDGKRQ1 meets industry standards.
7.What is the process for return or replacement of OPA1642AQDGKRQ1?
All OPA1642AQDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA1642AQDGKRQ1, 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 OPA1642AQDGKRQ1 part is unused and in its original packaging.
Return procedure for OPA1642AQDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA1642AQDGKRQ1 Tags
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LM358DT
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