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Texas Instruments TAS5558DCA
- Part No.:
- TAS5558DCA
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 56-PowerTFSOP (0.240", 6.10mm Width)
- Datasheet:
-
TAS5558DCA.pdf
- Description:
- IC MODULATOR 56HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,934
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Product details
Overview
TAS5558DCA from Texas Instruments is an 8-channel digital audio processor (DAP) with integrated asynchronous sample rate converter (ASRC), PWM modulator, and headphone driver - designed for Blu-ray HTiB and high-definition audio systems. It supports dual 4-channel ASRC banks (up to 192 kHz), delivers >105 dB dynamic range, THD+N < 0.01% at 1 kHz, and drives eight differential PWM outputs plus two dedicated headphone channels.
For engineers reviewing the TAS5558DCA datasheet, TAS5558DCA pinout, TAS5558DCA application, or TAS5558DCA equivalent, key selection considerations include its dual-bank ASRC latency (102.53125/FSin + 36.46875/FSout), PSVC-enabled power-supply volume control (12–24 dB range), I²C programmable biquad filters (7 per channel), and support for AD/BD/ternary modulation at 384 kHz switching rate.
Technical Context
The TAS5558DCA implements two independent 4-channel ASRC modules enabling simultaneous processing of two distinct input sampling rates (e.g., 44.1 kHz and 48 kHz), with passband ripple ±0.05 dB and stopband attenuation of 130 dB. Its digital audio path includes 10-channel input muxing, 8-channel processing engine with configurable loudness compensation, dual dynamic range compressors, and 8-channel output mixer.
It integrates a fourth-order noise shaper and 8× oversampling to achieve flat 20 Hz–40 kHz noise floor, supports I²S master/slave operation up to 192 kHz, and features dual differential headphone outputs (PWM_HPP/PWM_HPM L/R) with soft mute and switchover timing (165 ms). Clocking relies on internal PLL locked to 12.288 MHz crystal with external filter components (200 Ω, 10 nF, 100 nF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 8-channel PWM output + 2-channel differential headphone output |
| ASRC Capability | Two independent 4-channel banks supporting concurrent 32–192 kHz inputs |
| Dynamic Range | >105 dB A-weighted (20 Hz–20 kHz, 48–96 kHz) |
| THD+N | <0.01% at 1 kHz, –1 dBFS output |
| Switching Rate | 384 kHz for AD/BD/ternary modulation across 48/96/192 kHz data rates |
| Volume Control | 18 dB gain to –127 dB attenuation; PSVC adds 12/18/24 dB programmable range |
| Sample Rate Support | I²S slave mode: 32–192 kHz with auto/manual detection; MCLK input: 2–50 MHz |
Pinout & Package
Package: HTSSOP-56 (14.00 mm × 6.10 mm), thermally enhanced with exposed thermal pad (pin 56 = GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM_HPP_L / PWM_HPM_L | Differential headphone left (+/–) | High-fidelity analog headphone drive via internal PWM; requires external differential-input amplifier |
| PWM_P_1–PWM_P_8 / PWM_M_1–PWM_M_8 | Differential PWM outputs (ch 1–8) | Eight fully independent H-bridge drive signals; support BTL or SE configurations |
| SDIN1, SDIN2, SDIN2-1, SDIN2-2, SDOUT/SDIN5 | Serial audio inputs/outputs | Five I²S ports: two for Bank 1 (SDIN1/SDIN2), two for Bank 2 (SDIN2-1/SDIN2-2), one bidirectional (SDOUT/SDIN5) |
| SCLK, LRCLK, MCLK, SCLKO, LRCLKO | Clock interface terminals | Supports master/slave I²S; SCLKO/LRCLKO serve dual role as outputs or Bank 2 inputs (SCLKIN_2/LRCKIN_2) |
| ASEL_EMO2, EMO1 | Energy Manager I/O | Configurable address select (I²C) and interrupt output for subwoofer power management |
| PSVC/MCLKO | Power-supply volume control PWM or MCLK output | Generates PWM signal for Class-G supply control or provides MCLK to external ADC |
| RESET, PDN, MUTE, HP_SEL | System control inputs | Asynchronous reset (hard-mute), active-low power-down, soft-mute ramp, and speaker/headphone mode selection |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel ASRC with dual-bank architecture | Enables concurrent processing of two independent sampling-rate streams (e.g., main audio + effects bus) |
| Programmable biquad filtering (7 per channel) | Allows real-time EQ, crossover, and room correction without external DSP |
| Power-Supply Volume Control (PSVC) | Improves SNR at low volumes by dynamically scaling supply rail; eliminates need for analog preamp stage |
| Dual dynamic range compressors | Independent threshold, offset, and slope settings per compressor enable adaptive dialog enhancement and peak limiting |
| Flexible automute logic | Programmable noise threshold and duration prevent pop/click during idle or low-level signal conditions |
Applications
| Home Theater in a Box (HTiB) | Blu-ray Disc Audio Processor |
|---|---|
Use Scenario: Integrated audio subsystem in compact HTiB delivering DTS-HD Master Audio decoding and amplification. IC Role / Device Role / Timing Role: Digital audio processor handling ASRC, volume control, bass/treble tone shaping, and PWM generation for 7.1-channel power stages. Use Value: Eliminates need for external SRC and DAC; supports 30 kHz bandwidth required for DTS-HD compatibility. |
Use Scenario: High-fidelity audio front-end in Blu-ray players supporting lossless multichannel PCM and bitstream passthrough. IC Role / Device Role / Timing Role: Dual-bank ASRC synchronizes HDMI audio (44.1 kHz) with internal video clock (48 kHz); 8-channel PWM drives discrete Class-D amps. Use Value: Enables seamless mixing of multiple audio sources with zero-latency sample rate adaptation and >105 dB SNR. |
| Smart Soundbar Audio Hub | Automotive Premium Audio Head Unit |
Use Scenario: Compact soundbar integrating streaming audio (Wi-Fi/Bluetooth), TV eARC, and voice assistant input. IC Role / Device Role / Timing Role: Central DAP managing five synchronous serial inputs (TV, BT, Wi-Fi DAC, mic ADC, aux), 8-channel mixing, and PSVC-driven power efficiency. Use Value: Reduces system BOM by consolidating SRC, EQ, dynamics, and PWM into single IC; PSVC extends battery life in portable variants. |
Use Scenario: Infotainment head unit requiring multi-source audio routing, loudness compensation, and subwoofer energy management. IC Role / Device Role / Timing Role: Audio processor with Energy Manager (EMO1/ASEL_EMO2) triggering subwoofer boost on bass transients; I²C-configurable biquads for cabin acoustic tuning. Use Value: Enables adaptive power delivery to subwoofer amplifier while maintaining consistent perceived loudness across vehicle speed and cabin noise profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital audio processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TAS5548DCA | 6-channel version; no headphone outputs; reduced biquad count (5 per channel); same ASRC latency and PSVC capability | Limited to 5.1-channel systems without headphone monitoring; lower pin count (48-pin HTSSOP) | Select when system requires fewer channels and space-constrained layout; shares software register map with TAS5558DCA |
| CS497016-CQZ | 32-bit floating-point DSP core; no integrated PWM; requires external Class-D drivers; higher MIPS but no native ASRC | Demands full custom firmware development; used where algorithmic flexibility (e.g., beamforming, AI audio) outweighs integration benefits | Choose for applications needing proprietary audio algorithms beyond fixed-function DAP capabilities; not drop-in compatible |
Compared with TAS5558DCA, TAS5548DCA reduces channel count and removes headphone functionality while retaining ASRC and PSVC-ideal for cost-optimized 5.1 systems. CS497016-CQZ offers programmable DSP but requires external PWM stages and full firmware development, making it suitable only where TAS5558DCA's fixed audio pipeline lacks required flexibility.
Availability
TAS5558DCA is available at Aetrix Electronics and suitable for home theater systems, Blu-ray players, smart soundbars, and automotive infotainment platforms requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TAS5558DCA 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 digital signal processing technologies, with over 50 years of innovation in high-performance audio solutions.
The TAS5558DCA belongs to TI's HD Audio Processor product line, engineered specifically for high-resolution consumer audio applications demanding DTS-HD compliance, low-latency ASRC, and integrated PWM drive - targeting Blu-ray HTiB, premium soundbars, and automotive head units.
FAQ
What is the primary function of the TAS5558DCA in an audio system?
The TAS5558DCA serves as a complete digital audio processor with integrated asynchronous sample rate conversion, 8-channel PWM modulation, headphone driver, and real-time audio processing (EQ, compression, loudness). It replaces discrete SRC, DAC, and digital volume control stages, directly driving Class-D power stages while supporting DTS-HD Master Audio bandwidth requirements up to 30 kHz.
Does the TAS5558DCA support multiple input sampling rates simultaneously?
Yes, the TAS5558DCA contains two independent 4-channel ASRC modules, allowing concurrent processing of two different input sampling rates - for example, 44.1 kHz from a CD player and 48 kHz from a streaming source. Each bank handles four channels, enabling true multi-format audio routing without external resampling hardware.
How does Power-Supply Volume Control (PSVC) work in the TAS5558DCA?
PSVC in the TAS5558DCA generates a PWM signal (on PSVC/MCLKO pin) that controls an external DC-DC converter to scale the analog supply rail (AVDD_PWM) proportionally to volume level. This improves dynamic range at low volumes by reducing quantization noise floor - a key advantage over fixed-rail Class-D architectures - and enables Class-G-like efficiency without analog preamplifiers.
What are the supported modulation schemes and switching frequencies for the TAS5558DCA PWM outputs?
The TAS5558DCA supports AD (Audio Delta), BD (Binary Delta), and ternary modulation schemes at a fixed 384 kHz switching frequency for input sample rates of 48 kHz, 96 kHz, and 192 kHz. This high oversampling ratio combined with fourth-order noise shaping ensures flat 20 Hz–40 kHz noise floor and >105 dB dynamic range across all supported data rates.
Can the TAS5558DCA drive both speakers and headphones simultaneously?
No - the TAS5558DCA uses the HP_SEL pin to select between speaker and headphone modes. When HP_SEL is low, the two differential headphone outputs (PWM_HPP_L/R and PWM_HPM_L/R) are active and speaker outputs are muted; when HP_SEL is high, all eight PWM speaker outputs are enabled and headphone outputs are disabled. This hardware-controlled switchover prevents signal contention and ensures safe operation.
TAS5558DCA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 56-PowerTFSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Modulator
- Applications:
- Digital Audio Interfacing
- Number of Channels:
- 8
- Interface:
- I2C, I2S
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Specifications:
- 32kHz ~ 192kHz
- Mounting Type:
- Surface Mount
- Grade:
- -
TAS5558DCA FAQ
1.How can I place an order for TAS5558DCA through Aetrix?
Please submit a Request for Quotation (RFQ) for TAS5558DCA 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 TAS5558DCA reliable?
The price and inventory of TAS5558DCA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TAS5558DCA is usually 5 days.
3.What payment methods are accepted for TAS5558DCA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TAS5558DCA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TAS5558DCA?
TAS5558DCA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TAS5558DCA 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 TAS5558DCA?
For technical support, including TAS5558DCA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TAS5558DCA requirements.
6.How does Aetrix verify that TAS5558DCA is sourced from the original manufacturer or authorized distributors?
All TAS5558DCA 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 TAS5558DCA meets industry standards.
7.What is the process for return or replacement of TAS5558DCA?
All TAS5558DCA units undergo pre-shipment inspection (PSI). If there is an issue with TAS5558DCA, 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 TAS5558DCA part is unused and in its original packaging.
Return procedure for TAS5558DCA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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