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Texas Instruments TAS3108IADCPR
- Part No.:
- TAS3108IADCPR
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 38-PowerTFSOP (0.173", 4.40mm Width)
- Datasheet:
-
TAS3108IADCPR.pdf
- Description:
- IC AUDIO SGNL PROCESSOR 38HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,745
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Product details
Overview
TAS3108IADCPR from Texas Instruments is an automotive-grade, fully programmable 8-channel audio digital signal processor (DSP) with integrated 8051 microcontroller, 48-bit data path, 28-bit coefficients, and 76-bit MAC. It supports sample rates from 32 kHz to 192 kHz, operates on a single 3.3-V supply, and delivers >2800 processing cycles per sample at 48 kHz - enabling real-time equalization, crossover, and volume control in premium automotive sound systems.
For engineers reviewing the TAS3108IADCPR datasheet, TAS3108IADCPR pinout, TAS3108IADCPR application, or TAS3108IADCPR equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade timing behavior, exact memory mapping (3K program RAM, 1K data RAM, 5.8K delay RAM), and two rigorously cross-checked alternative parts for AEC-Q100-compliant audio DSP selection.
Technical Context
The TAS3108IADCPR integrates a fixed-point audio DSP core with dual I²C interfaces (slave port SDA1/SCL1 for system control; master port SDA2/SCL2 for EEPROM boot loading) and eight serial audio ports (four inputs SDIN1–SDIN4, four outputs SDOUT1–SDOUT4). Its architecture enables simultaneous TDM and non-TDM format conversion - e.g., 8-channel left-justified input to 2-channel I²S output - without external glue logic.
It features a 135-MHz maximum clock speed, PLL-based clock generation supporting 6–24.576 MHz MCLK, and independent input/output data format configuration via I²C register 0x00. The embedded 8051 MCU (12K code RAM, 256 IRAM) handles firmware-driven GPIO control, SAP reconfiguration sequencing, and volume update synchronization to prevent audio artifacts during format switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Processing Speed | 135-MHz max clock; >2800 cycles/sample at 48 kHz - sufficient for multi-band parametric EQ + dynamic range compression + 8-channel mixing |
| Data Path Width | 48-bit data path with 76-bit accumulator - prevents overflow in cascaded filter stages and preserves SNR in high-precision audio algorithms |
| Sample Rate Support | 32 kHz to 192 kHz - covers CD, DVD-Audio, SACD, and high-res streaming formats in automotive infotainment |
| Serial Audio Ports | 4-input / 4-output; supports 2-/4-/6-/8-channel TDM, I²S, left/right-justified - enables flexible interface to ADCs, DACs, and SoCs |
| Memory Resources | 3K × 54-bit program RAM, 1K × 48-bit data RAM, 1K × 28-bit coefficient RAM, 5.8K × 24-bit delay RAM - accommodates complex FIR/IIR filters and multi-tap delays |
| Power Supply | Single 3.3-V supply; internal regulators generate AVDD/DVDD rails - simplifies PCB power design and eliminates external LDOs |
| Automotive Qualification | AEC-Q100 Grade 2 (−40°C to +105°C) - qualified for under-dash and head-unit mounting in passenger vehicles |
Pinout & Package
38-pin Thin Shrink Small-Outline Package (TSSOP-DCP), 0.65-mm pitch, body size 9.7 × 4.4 mm. Thermal pad exposed on underside for enhanced heat dissipation in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDIN1–SDIN4 | Serial audio input channels | Accept 16/20/24/32-bit data in I²S, left/right-justified, or TDM formats; SDIN1 supports 4/6/8-channel TDM |
| SDOUT1–SDOUT4 | Serial audio output channels | Output processed audio; SDOUT1 supports 4/6/8-channel TDM; all outputs support independent format selection |
| SCLKIN / SCLKOUT1 / SCLKOUT2 | Bit clock I/O | SCLKIN receives bit clock in slave mode; SCLKOUT1 clocks inputs, SCLKOUT2 clocks outputs - enables synchronous multi-device timing |
| LRCLK | Sample rate clock (I/O) | Bi-directional frame sync; polarity determines I²S vs. non-I²S timing alignment - critical for deterministic input-to-output latency |
| MCLKI / MCLKO | Master clock I/O | MCLKI accepts 6–24.576 MHz crystal or digital clock; MCLKO drives external devices - supports both crystal and oscillator-based clock trees |
| SDA1/SCL1 | I²C slave interface | System controller communicates configuration/status; address configurable via CS0 - allows dual-device addressing without level shifters |
| SDA2/SCL2 | I²C master interface | Loads firmware/data from external EEPROM at boot - eliminates need for host CPU intervention during startup |
| GPIO | Programmable I/O | Firmware-configurable as input or output; used for boot-mode selection (EEPROM present/absent) and runtime status signaling |
| RESET / PDN | Asynchronous reset / power-down | RESET restores default state; PDN halts clocks while preserving RAM contents - enables ultra-low-power standby modes |
Key Features
| Feature | Design Value |
|---|---|
| Independent input/output data formatting | Enables format translation (e.g., 8-channel TDM input → 2-channel I²S output) without external logic or FPGA resources |
| Soft volume controller with dither generator | Prevents audible zipper noise during real-time gain changes; dither masks quantization distortion in low-level signals |
| Five simultaneous operations per clock cycle | Maximizes instruction throughput in audio algorithms - e.g., parallel FIR filtering, level detection, and metadata insertion |
| Efficient log₂/2ˣ estimator | Accelerates dynamic range compression and loudness normalization calculations - reduces 8051 firmware execution time by ~40% |
| Two I²C ports (slave + master) | Decouples system control (slave) from firmware loading (master) - eliminates bus contention and enables field-upgradable audio profiles |
Applications
| Automotive Sound Systems | Digital Televisions |
|---|---|
Use Scenario: Multi-zone audio processing in premium vehicle infotainment with active noise cancellation and cabin resonance compensation. IC Role / Device Role / Timing Role: Primary audio DSP handling 8-channel analog/digital input routing, real-time FIR-based room correction, and 4-channel amplifier drive with synchronized LRCLK timing. Use Value: AEC-Q100 qualification ensures reliability at 105°C; 48-bit precision maintains THD+N < −105 dB across temperature, critical for high-fidelity cabin audio. |
Use Scenario: Integrated audio post-processing in 4K UHD smart TVs supporting Dolby Atmos and DTS:X decoding pipelines. IC Role / Device Role / Timing Role: Secondary DSP offloading equalization, bass management, and speaker calibration from main SoC - synchronized via I²C and shared MCLK. Use Value: Independent input/output format support allows direct interface to HDMI ARC receivers (I²S) and legacy SPDIF DACs (TDM), reducing BOM cost. |
| Home Theater Systems | Mini-Component Audio |
Use Scenario: Compact AV receiver implementing 7.1-channel surround decoding, dynamic range control, and virtual surround upmixing. IC Role / Device Role / Timing Role: Central audio engine managing 8-channel TDM input from DAC array, applying psychoacoustic processing, and outputting to discrete amplifiers. Use Value: 5.8K delay RAM enables 122.5 ms of latency-free buffering at 48 kHz - sufficient for lip-sync correction and multi-room audio synchronization. |
Use Scenario: High-end stereo bookshelf system with adaptive room correction, Bluetooth streaming integration, and analog/digital source switching. IC Role / Device Role / Timing Role: Audio hub converting Bluetooth SBC/AAC streams (I²S) to analog outputs while applying real-time parametric EQ and loudness compensation. Use Value: Single 3.3-V supply and integrated regulators reduce power stage complexity; GPIO pin enables hardware mute control during source transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio DSP applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TAS3204PAPR | 4-channel audio DSP (vs. 8-channel); 32-bit data path; no embedded 8051; requires external microcontroller | Targeted at cost-sensitive stereo systems without multi-zone or advanced firmware control needs | Select when channel count and autonomous operation are not required - reduces firmware development overhead |
| TAS5756MRTVR | Integrated Class-D amplifier + DSP; 32-bit path; 192-kHz support; no TDM input capability | Designed for direct-drive speaker applications where amplification and processing are co-located | Choose when replacing discrete DAC + amplifier + DSP chain - saves board space but sacrifices TDM flexibility |
Compared with TAS3108IADCPR, TAS3204PAPR offers lower channel count and no on-chip MCU, making it suitable for simpler stereo systems; TAS5756MRTVR integrates power amplification but lacks TDM input support, limiting its use in multi-source automotive architectures requiring flexible digital interconnect.
Availability
TAS3108IADCPR is available at Aetrix Electronics and suitable for automotive infotainment, premium home theater, digital television audio subsystems, and mini-component audio requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for TAS3108IADCPR 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, embedded processing, and connectivity technologies, with over 50 years of innovation in high-reliability signal processing solutions.
The TAS3108IADCPR belongs to TI's automotive-qualified audio DSP product line, designed specifically for real-time, high-fidelity audio processing in thermally demanding environments such as vehicle head units and advanced driver-assistance systems.
FAQ
What is the primary function of the TAS3108IADCPR in an audio system?
The TAS3108IADCPR serves as a fully programmable 8-channel audio digital signal processor with integrated 8051 microcontroller. It performs real-time audio processing tasks including equalization, crossover filtering, dynamic range compression, and volume control. Its 48-bit data path and 76-bit MAC ensure high-fidelity signal integrity, while dual I²C interfaces enable both system control and autonomous firmware loading - making TAS3108IADCPR ideal for automotive and premium consumer audio platforms requiring deterministic latency and AEC-Q100 reliability.
Does the TAS3108IADCPR support TDM audio formats, and which channel counts are valid?
Yes, the TAS3108IADCPR supports TDM formats on SDIN1 and SDOUT1, with validated configurations for 4-, 6-, and 8-channel operation. Input TDM is restricted to SDIN1 only; output TDM is restricted to SDOUT1 only. All other serial ports (SDIN2–4, SDOUT2–4) support only 2-channel formats (I²S, left/right-justified). This architecture allows TAS3108IADCPR to serve as a format translator between multi-channel digital sources (e.g., automotive telematics modules) and stereo DACs or amplifiers.
How does the TAS3108IADCPR handle clock domain crossing between input and output audio streams?
The TAS3108IADCPR uses independent clock domains for input and output serial audio ports, managed via its PLL and clock control registers. When input and output formats differ - especially between I²S and non-I²S - the device introduces deterministic latency: 2 samples for non-I²S formats, or 1.5/2.5 samples for I²S conversions depending on MCLKI/XTALI frequency selection relative to LRCLK. This behavior is documented in Section 3.8.5 of the SLES152B datasheet and is fully controllable through register 0x00 configuration - ensuring TAS3108IADCPR meets strict lip-sync and multi-device synchronization requirements.
What memory resources are available on the TAS3108IADCPR for audio algorithm implementation?
The TAS3108IADCPR provides 3K words of 54-bit program RAM, 1K words of 48-bit data RAM, 1K words of 28-bit coefficient RAM, and 5.8K words of 24-bit delay RAM. This allocation supports complex FIR/IIR filters (coefficient RAM), real-time signal buffers (data RAM), multi-tap delays up to 122.5 ms at 48 kHz (delay RAM), and custom firmware (program RAM). The memory map is unified and accessible to both the audio DSP core and 8051 MCU - enabling tight coupling between control logic and signal processing in TAS3108IADCPR-based designs.
Is the TAS3108IADCPR pin-compatible with any other Texas Instruments audio DSPs?
No, the TAS3108IADCPR is not pin-compatible with other TI audio DSPs. Its 38-pin TSSOP-DCP package contains unique pin assignments - including dedicated SCLKOUT1/SCLKOUT2 for independent input/output bit clock generation, dual I²C ports (SDA1/SCL1 and SDA2/SCL2), and PLL control pins (PLL0–PLL2) - that differ from those of TAS3204PAPR (32-pin QFN) or TAS5756MRTVR (40-pin VQFN). Migration requires PCB redesign and firmware adaptation; TAS3108IADCPR must be treated as a standalone footprint in layout planning.
TAS3108IADCPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 38-PowerTFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Audio Signal Processor
- Applications:
- Audio
- Number of Channels:
- 4
- Interface:
- I2C
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Specifications:
- -
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
TAS3108IADCPR FAQ
1.How can I place an order for TAS3108IADCPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TAS3108IADCPR 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 TAS3108IADCPR reliable?
The price and inventory of TAS3108IADCPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TAS3108IADCPR is usually 5 days.
3.What payment methods are accepted for TAS3108IADCPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TAS3108IADCPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TAS3108IADCPR?
TAS3108IADCPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TAS3108IADCPR 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 TAS3108IADCPR?
For technical support, including TAS3108IADCPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TAS3108IADCPR requirements.
6.How does Aetrix verify that TAS3108IADCPR is sourced from the original manufacturer or authorized distributors?
All TAS3108IADCPR 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 TAS3108IADCPR meets industry standards.
7.What is the process for return or replacement of TAS3108IADCPR?
All TAS3108IADCPR units undergo pre-shipment inspection (PSI). If there is an issue with TAS3108IADCPR, 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 TAS3108IADCPR part is unused and in its original packaging.
Return procedure for TAS3108IADCPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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