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Texas Instruments TAS5548DCA
- Part No.:
- TAS5548DCA
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 56-PowerTFSOP (0.240", 6.10mm Width)
- Datasheet:
-
TAS5548DCA.pdf
- Description:
- IC MODULATOR 56HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
TAS5548DCA from Texas Instruments is an 8-channel digital audio processor (DAP) with integrated asynchronous sample rate converter (ASRC), PWM output generator, and headphone driver. It delivers 105 dB dynamic range, supports 32–192 kHz input rates across 10 serial audio inputs, and provides eight differential PWM outputs for Class-D amplification plus dual differential headphone outputs. It targets Blu-ray HTiB systems requiring DTS-HD compatibility and high-fidelity multichannel audio processing.
For engineers reviewing the TAS5548DCA datasheet, TAS5548DCA pinout, TAS5548DCA application, or TAS5548DCA equivalent, key selection criteria include its dual 4-channel ASRC banks, PSVC-enabled power-supply volume control, 384-kHz PWM switching rate with AD/BD/ternary modulation, and HTSSOP-56 package with dedicated analog/digital power domains and EMO/PSVC interface capability.
Technical Context
The TAS5548DCA integrates two independent 4-channel ASRC modules enabling simultaneous handling of two distinct input sampling rates (e.g., 44.1 kHz and 48 kHz), with SRC latency defined as 102.53125/FSin + 36.46875/FSout and stop-band attenuation of 130 dB. Its digital audio processing path includes seven biquad filters per channel, configurable loudness compensation, dual dynamic range compressors, and ±18-dB bass/treble tone controls.
It implements a fixed-flow architecture with I²C-controlled MCU core, supports slave-mode operation from 32–192 kHz with auto/manual sample rate detection, and uses a 12.288 MHz crystal to generate internal clocks via PLL with external RC filter pins (PLL_FLTP/PLL_FLTM). The device features separate analog (AVDD/AVSS) and digital (DVDD/DVSS) supply domains, plus dedicated VR_DIG (1.8 V digital core), VR_PWM (1.8 V PLL), and VR_ANA (1.8 V analog PLL) reference outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 8-channel PWM output with 2-channel differential headphone drive |
| ASRC | Dual 4-channel asynchronous sample rate converter supporting up to two concurrent input rates |
| PWM Switching Rate | 384 kHz for 48/96/192 kHz data; enables >105 dB A-weighted dynamic range |
| Dynamic Range | 105 dB (A-weighted, 20 Hz–20 kHz at 48 kHz) |
| THD+N | <0.01% at 1 kHz, –1 dBFS output |
| Volume Control Range | –127 dB to +18 dB with programmable slew rates and PSVC support |
| Package | HTSSOP-56 (14.00 mm × 6.10 mm) with thermal pad and segregated analog/digital ground planes |
Pinout & Package
Package: HTSSOP-56 (14.00 mm × 6.10 mm), thermally enhanced with exposed thermal pad. Requires separate analog (AVDD/AVSS) and digital (DVDD/DVSS) supply routing and dedicated low-ESR decoupling on VR_DIG (4.7 µF), VR_PWM/VR_ANA (0.1 µF), and AVDD_PWM (0.1 µF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM_HPM_L / PWM_HPP_L | Differential headphone left (–)/(+) | High-performance 2-channel differential PWM output for external analog headphone amp |
| PWM_M_1–PWM_M_8 / PWM_P_1–PWM_P_8 | Differential PWM channel outputs (–)/(+) | Eight fully independent H-bridge PWM pairs supporting BTL or SE configurations |
| SDIN1–SDIN2-2 (SDIN3/SDIN4) | Serial audio inputs (Bank 1 & Bank 2) | 10 total input channels across two ASRC banks; supports 64× fS I²S/TDM formats |
| SCLK / LRCLK / SCLKO / LRCLKO | Audio clock interface | Slave-mode timing with auto-detection (32–192 kHz); SCLKO/LRCLKO usable as secondary input clocks |
| ASEL_EMO2 / EMO1 | Energy Manager I/O | Configurable I²C address select (0x34/0x36) and subwoofer energy threshold interrupt output |
| PSVC/MCLKO | Power-supply volume control PWM or MCLK output | Enables Class-G-like efficiency by modulating supply rail; also serves as MCLK source for external ADC |
| VALID / BKND_ERR / /PDN / /MUTE / /HP_SEL | System control/status signals | Hardware-level error recovery, soft/hard mute, speaker/headphone switchover, and power-down with I²C state retention |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Sample Rate Conversion | Dual 4-channel ASRC with 130 dB stop-band attenuation and <0.05 dB passband ripple enables mixed-rate source integration without jitter accumulation |
| Power-Supply Volume Control (PSVC) | 2048-step PWM output (12/18/24 dB range) directly modulates analog supply rails to improve SNR at low volumes and enable Class-G operation |
| Differential Headphone Outputs | Two dedicated differential PWM channels (HPM/HP_P) eliminate need for external level-shifting or AC-coupling in compact HTiB designs |
| Energy Manager (EMO) | Programmable subwoofer energy threshold detection with interrupt output (EMO1) and addressable I²C node (ASEL_EMO2) for multi-zone power optimization |
| Flexible Audio Processing | Seven biquad filters per channel, dual DRC with three slope options, and configurable loudness compensation support precise loudspeaker tuning and content-aware dynamics |
Applications
| Home Theater-in-a-Box (HTiB) | Blu-ray Audio Processor |
|---|---|
Use Scenario: Integrated 7.1-channel audio system with HDMI/SPDIF inputs, DTS-HD decoding, and discrete Class-D amplification. IC Role / Device Role / Timing Role: Central digital audio processor performing ASRC, channel mixing, tone control, DRC, and PWM generation for all speakers and subwoofer. Use Value: Eliminates external SRC and DAC stages; supports native 192 kHz playback and DTS-HD bitstream passthrough with <0.01% THD+N. | Use Scenario: High-fidelity Blu-ray player audio subsystem requiring lossless decoding, bass management, and headphone output. IC Role / Device Role / Timing Role: Audio post-processor accepting decoded PCM from BD controller, applying room correction, and driving both speaker PWMs and differential headphone outputs. Use Value: Enables simultaneous speaker playback and private headphone listening with zero-latency switchover via /HP_SEL and hard-mute safety on BKND_ERR. |
| Multi-Zone Audio System | Smart Soundbar with Subwoofer |
Use Scenario: Networked AV receiver distributing audio to multiple rooms using synchronized sample rates and independent volume control. IC Role / Device Role / Timing Role: Master DAP receiving networked PCM streams, converting rates via dual ASRC banks, and generating zone-specific PWM outputs with PSVC-adjusted supply rails. Use Value: Maintains lip-sync across zones using deterministic SRC latency and enables independent power scaling per zone via PSVC. | Use Scenario: Compact soundbar with wireless subwoofer link and adaptive bass extension. IC Role / Device Role / Timing Role: Audio hub accepting TV optical input, applying bass EQ and DRC, generating main channel PWM, and routing low-frequency content via SDOUT to subwoofer ADC. Use Value: SDOUT (SDIN5) provides synchronous low-latency subwoofer feed; EMO1 triggers subwoofer boost only during high-energy passages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital audio processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TAS5558RTVR | 10-channel DAP with identical ASRC architecture, same HTSSOP-56 package, but adds 2-channel I²S output for wireless subwoofer link | Supports direct I²S subwoofer interface without requiring SDOUT reconfiguration; lacks headphone PWM outputs | Select when subwoofer requires native I²S instead of analog PWM or when headphone output is unnecessary |
| TAS5825MRTWR | 8-channel DAP with integrated closed-loop feedback, higher 120 dB dynamic range, and 1.2 MHz PWM switching, but no ASRC or headphone outputs | Targeted at premium active speakers needing real-time distortion correction; requires external SRC for multi-rate sources | Select when closed-loop stability and ultra-low THD (<0.003%) outweigh ASRC and headphone functionality |
Compared with TAS5548DCA, TAS5558RTVR extends subwoofer connectivity via dedicated I²S while removing headphone capability, whereas TAS5825MRTWR trades ASRC and headphone support for closed-loop precision and higher PWM resolution-making TAS5548DCA optimal for cost-sensitive HTiB designs requiring full-feature integration in one IC.
Availability
TAS5548DCA is available at Aetrix Electronics and suitable for home theater systems, Blu-ray players, smart soundbars, and multi-zone audio equipment requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.
Supply support for TAS5548DCA 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 audio, power management, and industrial control ICs.
The TAS5548DCA belongs to TI's high-performance digital audio processor product line, designed specifically for Blu-ray HTiB and premium consumer audio applications demanding DTS-HD compliance, multichannel ASRC, and integrated PWM output with minimal external components.
FAQ
What is the primary function of the TAS5548DCA in a home theater system?
The TAS5548DCA serves as the central digital audio processor in home theater systems, performing asynchronous sample rate conversion for mixed-rate digital inputs, applying tone control and dynamic range compression, and generating eight differential PWM outputs to drive Class-D amplifier stages. It enables DTS-HD compatibility and supports dual headphone/speaker operation via /HP_SEL, making it ideal for HTiB implementations where space and BOM count are constrained. The TAS5548DCA integrates functions that would otherwise require multiple discrete ICs.
Does the TAS5548DCA support multiple input sampling rates simultaneously?
Yes, the TAS5548DCA supports two concurrent input sampling rates using its dual 4-channel ASRC architecture-one bank handles SDIN1/SDIN2 (Bank 1), the other handles SDIN2-1/SDIN2-2 (Bank 2). This allows simultaneous processing of, for example, 44.1 kHz CD audio and 48 kHz streaming content without external resampling. Each ASRC bank operates independently with 130 dB stop-band attenuation and deterministic latency per the formula 102.53125/FSin + 36.46875/FSout. The TAS5548DCA maintains full audio fidelity across both streams.
How does the Power-Supply Volume Control (PSVC) feature work in the TAS5548DCA?
The PSVC feature in the TAS5548DCA generates a 2048-step PWM signal on the PSVC/MCLKO pin to modulate the analog supply rail (e.g., AVDD_PWM) dynamically based on audio volume level. This improves SNR at low volumes by reducing supply noise contribution and enables Class-G-like efficiency. PSVC offers selectable ranges of 12, 18, or 24 dB and operates independently of digital volume control. When enabled, the TAS5548DCA reduces power consumption during quiet passages while preserving headroom for transients-critical for battery-powered or thermally constrained HTiB designs.
Can the TAS5548DCA drive both speakers and headphones at the same time?
No-the TAS5548DCA uses the /HP_SEL pin to implement exclusive speaker/headphone operation: logic low selects headphone mode (disabling speaker PWMs), logic high selects speaker mode (disabling headphone PWMs). This hardware-controlled switchover ensures zero-latency, glitch-free transitions and prevents simultaneous drive that could cause supply contention or output conflict. The TAS5548DCA's dual differential headphone outputs (PWM_HPM_L/R and PWM_HPP_L/R) are only active in headphone mode, while all eight main PWM channels are disabled. This design meets safety and EMI requirements for consumer audio.
What are the critical power supply requirements for stable operation of the TAS5548DCA?
The TAS5548DCA requires three isolated 3.3 V domains: DVDD1/DVDD2 (digital), AVDD/AVDD_PWM (analog/PWM), and separate ground returns (DVSS1/DVSS2, AVSS/AVSS_PWM). VR_DIG (1.8 V digital core) must be decoupled with a 4.7 µF low-ESR capacitor to DVSS; VR_PWM and VR_ANA each require 0.1 µF to their respective grounds. AVDD_PWM must be bypassed locally with 0.1 µF to AVSS_PWM to minimize PLL jitter. Supply sequencing is not required, but all supplies must be stable before releasing /RESET. The TAS5548DCA draws ~8 mA on DVDD and ~8 mA on AVDD under typical 48 kHz operation.
TAS5548DCA 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:
- -
TAS5548DCA FAQ
1.How can I place an order for TAS5548DCA through Aetrix?
Please submit a Request for Quotation (RFQ) for TAS5548DCA 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 TAS5548DCA reliable?
The price and inventory of TAS5548DCA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TAS5548DCA is usually 5 days.
3.What payment methods are accepted for TAS5548DCA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TAS5548DCA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TAS5548DCA?
TAS5548DCA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TAS5548DCA 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 TAS5548DCA?
For technical support, including TAS5548DCA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TAS5548DCA requirements.
6.How does Aetrix verify that TAS5548DCA is sourced from the original manufacturer or authorized distributors?
All TAS5548DCA 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 TAS5548DCA meets industry standards.
7.What is the process for return or replacement of TAS5548DCA?
All TAS5548DCA units undergo pre-shipment inspection (PSI). If there is an issue with TAS5548DCA, 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 TAS5548DCA part is unused and in its original packaging.
Return procedure for TAS5548DCA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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