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Texas Instruments TAS5086DBTG4
- Part No.:
- TAS5086DBTG4
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
TAS5086DBTG4.pdf
- Description:
- IC MODULATOR 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,031
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Product details
Overview
TAS5086DBTG4 from Texas Instruments is a six-channel digital pulse-width modulator (PWM) IC designed for high-fidelity audio systems. It accepts 16-/20-/24-bit I2S, left-justified, or right-justified serial audio inputs at sampling rates from 32 kHz to 192 kHz, performs 8× oversampling with fourth-order noise shaping, delivers ≥105-dB dynamic range (20 Hz–20 kHz), and outputs six PWM channels compatible with single-ended or bridge-tied load power stages - used in home theater AV receivers and multi-channel active speaker systems.
For engineers reviewing the TAS5086DBTG4 datasheet, TAS5086DBTG4 pinout, TAS5086DBTG4 application, or TAS5086DBTG4 equivalent, key selection considerations include its 38-pin TSSOP package, I2C slave control interface (100/400 kHz), 3.3-V-only digital/analog supply, 64-/48-fS bit-clock support, and AM interference avoidance capability - all critical for noise-sensitive audio subsystems requiring clean PWM drive and flexible channel mapping.
Technical Context
The TAS5086DBTG4 operates as a clock-slave device, accepting MCLK (4–50 MHz), SCLK (64-/48-fS), and LRCLK (32–192 kHz) from external sources. Its PLL locks to MCLK or falls back to an internal oscillator for error detection and automatic sample-rate identification across 32/44.1/48/88.2/96/176.4/192-kHz data rates.
It implements a 1N+1 PWM interface format supporting direct connection to TI's TAS5186, TAS5142, or TAS5111/5112 power stages. Channel 6 includes two programmable biquad filters for bass management, while all six channels feature individual volume control (24 dB to –100 dB in 0.5-dB steps), DC blocking, and selectable de-emphasis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Six independent PWM output channels with full input-to-output mapping flexibility |
| Sampling Rates | 32, 44.1, 48, 88.2, 96, 176.4, and 192 kHz - auto-detected or manually set via I2C |
| Oversampling | 12× at 32 kHz; 8× at 44.1/48 kHz; 4× at 88.2/96 kHz; 2× at 176.4/192 kHz |
| Dynamic Range | ≥105 dB (20 Hz–20 kHz, measured with TAS5086 + TAS5186 at speaker terminals) |
| THD+N | <0.06% (measured at TAS5086DBTG4 PWM outputs, not system-level) |
| Supply Voltage | DVDD = AVDD = 3.0–3.6 V - single 3.3-V rail powers both digital and analog sections |
| I²C Interface | Standard/fast-mode slave (100/400 kHz); functional without MCLK; supports multi-byte writes in 4-byte increments |
| Modulation Limit | Adjustable from 93.8% to 99.2% - prevents clipping while preserving headroom in PWM stage |
Pinout & Package
Package: 38-pin TSSOP (DBT), 0.65-mm pitch, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MCLK | Master clock input | 3.3-V/5-V tolerant; 4–50 MHz input for PLL reference; required for normal operation unless oscillator fallback enabled |
| SCLK / LRCLK | Serial audio bit clock & frame sync | 5-V tolerant; SCLK supports 64-/48-fS ratios; LRCLK defines sample rate (32–192 kHz); both pulldown-biased |
| SDIN1–SDIN4 | Serial audio data inputs | Four independent 24-bit stereo-capable inputs; support I2S/left/right-justified; all pulldown-biased |
| PWM_1–PWM_6 | PWM output drivers | CMOS digital outputs driving external Class-D power stages; each configurable per channel mapping |
| VALID1 / VALID2 | Soft-start & PWM validity indicators | Active-high open-drain outputs signaling safe-to-enable (VALID1) and stable-PWM (VALID2) states |
| PDN / RESET / MUTE | Control inputs | All 5-V tolerant, pullup-biased; PDN enables soft power-down (100-ms recovery); RESET forces hard-mute and reinitialization |
| SDA / SCL | I²C control interface | 5-V tolerant bidirectional data/clock; require 3.3-kΩ pullups; support fast-mode timing (400 kHz) |
| VR_ANA / VR_DIG / VR_OSC | Internal voltage references | 1.8-V analog/digital/oscillator reference pins; each requires 0.1-µF low-ESR capacitor to respective ground |
Key Features
| Feature | Design Value |
|---|---|
| AM Interference Avoidance | Adjusts PWM clocking to 7-/8-/9-fS ratios during AM band reception - eliminates audible switching artifacts without muting |
| Click-and-Pop Suppression | Optimized PWM startup/shutdown sequence and zero-input mute prevent transient spikes - no external hardware needed |
| Flexible Channel Mapping | Any SDINx input can be routed to any PWMy output via register-controlled multiplexers - enables custom 5.1/6.1/7.1 configurations |
| Subwoofer-Specific Processing | Two programmable biquads (gain-compensated + low-pass) on Channel 6 - supports bass management without external DSP |
| AC-Coupling Capacitor Charging | Specialized PWM sequence pre-charges coupling caps in single-ended configurations - avoids DC transients at power-on |
| Downmix Capability | Generates stereo (L'+R')/2 output on SDOUT or routes downmixed signal to front/center/sub channels - simplifies multi-zone audio routing |
Applications
| Home Theater AV Receiver | Multi-Channel Active Speaker |
|---|---|
|
Use Scenario: Six-channel audio processing in compact AV receivers supporting Dolby Digital and DTS decoding. IC Role / Device Role / Timing Role: PWM processor converting decoded PCM to six synchronized PWM streams for discrete Class-D amplifier modules. Use Value: Enables high-efficiency, low-heat 5.1-channel amplification in space-constrained enclosures using only one 3.3-V supply and minimal external components. |
Use Scenario: Integrated amplification in powered studio monitors or smart soundbars with discrete woofer/tweeter drivers. IC Role / Device Role / Timing Role: Central PWM engine driving separate BTL power stages per driver - LF, RF, LS, RS, C, SW - with independent volume and bass tuning. Use Value: Eliminates need for external DACs or analog mixing; subwoofer biquads and channel mapping allow precise acoustic calibration per driver. |
| Automotive Infotainment Head Unit | Pro Audio DSP Amplifier |
|
Use Scenario: High-SNR audio output in vehicle head units where AM radio coexistence is mandatory. IC Role / Device Role / Timing Role: Six-channel PWM modulator with AM interference avoidance mode activated during AM band scanning. Use Value: Maintains clean audio playback during AM reception by dynamically shifting PWM carrier frequency - no user-perceptible interruption. |
Use Scenario: Rack-mountable DSP amplifier combining digital signal processing and Class-D output in live sound reinforcement. IC Role / Device Role / Timing Role: Front-end PWM generator receiving processed 24-bit audio from FPGA/DSP over I2S, delivering time-aligned PWM to six power modules. Use Value: Supports 192-kHz input with 2× oversampling and >105-dB SNR - preserves ultra-wideband audio fidelity through the entire signal chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar six-channel digital PWM processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TAS5086PAP | 64-pin HTQFP package; identical electrical specs and register map; includes additional GPIOs and enhanced thermal pad | Better thermal performance and PCB routing flexibility for high-power designs; supports larger decoupling networks | Select TAS5086PAP when board layout allows larger footprint and thermal management is critical above 15 W/channel |
| TAS5086DBTR | Same 38-pin TSSOP package but tape-and-reel packaging; identical pinout, timing, and functionality to TAS5086DBTG4 | No functional difference; optimized for automated SMT assembly rather than manual prototyping or small-batch use | Choose TAS5086DBTR for high-volume production; TAS5086DBTG4 is preferred for evaluation and low-quantity builds |
Compared with TAS5086PAP, TAS5086DBTG4 offers lower cost and smaller footprint but reduced thermal headroom; compared with TAS5086DBTR, it differs only in packaging - same silicon, same performance, same design-in effort.
Availability
TAS5086DBTG4 is available at Aetrix Electronics and suitable for home theater receivers, powered speakers, automotive infotainment systems, and professional audio amplifiers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TAS5086DBTG4 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 technologies - serving industrial, automotive, and consumer markets with high-reliability, application-optimized ICs.
The TAS5086DBTG4 belongs to TI's PurePath Digital™ audio processor family, engineered specifically for high-efficiency, low-noise Class-D amplifier systems requiring precise PWM generation, flexible channel routing, and robust EMI mitigation in space- and power-constrained designs.
FAQ
What is the primary function of the TAS5086DBTG4 in an audio system?
The TAS5086DBTG4 is a six-channel digital PWM processor that converts multi-format serial audio inputs (I2S, left/right-justified) into six synchronized PWM output streams. It performs oversampling, noise shaping, volume control, channel mapping, and AM interference avoidance - acting as the digital front-end for Class-D amplifier stages. Its role is strictly PWM generation; it does not include DACs, ADCs, or analog signal paths.
Does the TAS5086DBTG4 require an external crystal or oscillator?
No, the TAS5086DBTG4 uses an internal oscillator for PLL reference and clock error detection, eliminating the need for an external crystal. However, it requires an external MCLK input (4–50 MHz) for normal operation. The internal oscillator serves only as a fallback during MCLK instability or absence - and oscillator trim via register 0x1B is required after each power-up or reset.
Can the TAS5086DBTG4 drive both single-ended and bridge-tied load amplifiers?
Yes, the TAS5086DBTG4 supports both configurations via its 1N+1 PWM interface format. It directly drives TI's TAS5186 (BTL or SE), TAS5142 (BTL or SE), and TAS5111 (SE) without external logic. For TAS5111/5112 BTL operation, one inverter per channel is required. The IC outputs CMOS-level PWM signals - external power stages handle current amplification and topology implementation.
How does the AM interference avoidance feature work in the TAS5086DBTG4?
The TAS5086DBTG4 shifts its PWM carrier frequency to 7-, 8-, or 9-fS ratios during AM band reception - moving switching energy away from sensitive AM frequencies. This is coordinated with the sample-rate converter and requires manual sample-rate setting (not auto-detected) when enabled. The feature operates without muting or interrupting audio, preserving continuous playback while eliminating audible switching noise in AM radios.
What are the power supply requirements for the TAS5086DBTG4?
The TAS5086DBTG4 requires two 3.3-V supplies: DVDD (digital) and AVDD (analog), both rated 3.0–3.6 V. It also provides three internal 1.8-V references (VR_ANA, VR_DIG, VR_OSC), each requiring a dedicated 0.1-µF low-ESR capacitor to its respective ground plane. All supplies must be well-decoupled; no 5-V supply is needed - only 5-V tolerance on select I/O pins.
TAS5086DBTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- PurePath Digital™
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Function:
- Modulator
- Applications:
- Digital Audio Interfacing
- Number of Channels:
- 6
- Interface:
- I2C, I2S
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Specifications:
- 32kHz ~ 192kHz
- Mounting Type:
- Surface Mount
- Grade:
- -
TAS5086DBTG4 FAQ
1.How can I place an order for TAS5086DBTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TAS5086DBTG4 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 TAS5086DBTG4 reliable?
The price and inventory of TAS5086DBTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TAS5086DBTG4 is usually 5 days.
3.What payment methods are accepted for TAS5086DBTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TAS5086DBTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TAS5086DBTG4?
TAS5086DBTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TAS5086DBTG4 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 TAS5086DBTG4?
For technical support, including TAS5086DBTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TAS5086DBTG4 requirements.
6.How does Aetrix verify that TAS5086DBTG4 is sourced from the original manufacturer or authorized distributors?
All TAS5086DBTG4 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 TAS5086DBTG4 meets industry standards.
7.What is the process for return or replacement of TAS5086DBTG4?
All TAS5086DBTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TAS5086DBTG4, 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 TAS5086DBTG4 part is unused and in its original packaging.
Return procedure for TAS5086DBTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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