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STMicroelectronics STA309A13TR
- Part No.:
- STA309A13TR
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 64-LQFP
- Datasheet:
-
STA309A13TR.pdf
- Description:
- IC FULLY INTEG PROCESSOR 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
STA309A13TR from STMicroelectronics is an 8-channel, 24-bit digital audio processor with integrated DDX® direct digital amplification control logic, supporting 32–192 kHz input sample rates, 6-channel DSD/SACD input, and up to 10 programmable biquad filters per channel. It delivers >100 dB SNR, dual independent limiters, and Automode™ for preset EQ, downmixing, and bass management - deployed in high-fidelity home theater AV receivers and multi-zone audio systems.
For engineers reviewing the STA309A13TR datasheet, STA309A13TR pinout, STA309A13TR application, or STA309A13TR equivalent, this page details its DDX® PWM output mapping, I²C-configurable DSP pipeline, per-channel gain/trim/mute, and real-time Automode™ loudness and anti-clipping behavior - critical for automotive infotainment head units, premium soundbars, and 5.1/7.1-channel amplifier designs.
Technical Context
The STA309A implements a fully digital signal path with 192 kHz internal processing at 24–36-bit precision, enabling simultaneous 5.1- and 2-channel downmix outputs with independent volume curves and preset AGC modes. Its Automode™ engine integrates 5-band graphic EQ, 32 factory presets (rock/jazz/pop), and 5.1-to-2.1 bass management configurations.
It supports selectable DDX® damped ternary or binary PWM output per channel, variable per-channel DDX® delay control, and max power correction to reduce full-power THD. Input flexibility includes I²S, left-justified, right-justified, and DSD formats, with DC blocking high-pass filtering and channel-mapping of any input to any processing channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 8-channel digital audio processing with independent volume, trim, mute, and DSP bypass per channel |
| Input Sample Rate | 32 kHz to 192 kHz - enables DVD-Audio, SACD/DSD, and high-res streaming compatibility |
| SNR / Dynamic Range | >100 dB - ensures low-noise performance in premium audio front-ends |
| DSP Precision | 24-bit to 36-bit internal processing - preserves resolution across EQ, mixing, and limiting stages |
| EQ Capability | Up to 10 user-programmable 32-bit biquads per channel - supports complex room correction and speaker tuning |
| DDX® Output Mode | Selectable damped ternary or binary PWM - optimizes efficiency vs. EMI trade-offs in Class-D amplifier stages |
| Automode™ Features | 5-band graphic EQ, 32 presets, automatic loudness, 5.1/2.1 bass management, and TV/commercial AGC - reduces firmware development for consumer audio OEMs |
Pinout & Package
TQFP64 (10 × 10 × 1.4 mm) package with exposed thermal pad; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Power Supply | 3.3 V supply for digital I/O buffers (I²C, I²S, GPIO) |
| VDDA | Analog Core Supply | 3.3 V supply for internal DSP and audio processing circuitry |
| VDDP | DDX® PWM Driver Supply | Separate 3.3 V or 5 V supply for DDX® output stage interface |
| SCL/SDA | I²C Interface | Configures all registers including Automode™, EQ, limiter thresholds, and channel mapping |
| LRCLK/BCLK/DIN/DOUT | I²S Serial Interface | Supports 8-channel I²S input/output with configurable channel mapping and sample rate alignment |
| MUTE/RESET | Hardware Control | Asynchronous hard mute and cold reset for PopFree startup/shutdown sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Automode™ Engine | Reduces firmware integration effort via 32 preset EQ curves, automatic volume-controlled loudness, and movie/TV listening modes |
| Per-Channel DDX® Delay Control | Enables precise time-alignment of multi-driver speaker systems without external DSP |
| Dual Independent Limiters | Prevents clipping in both main and downmixed outputs simultaneously - essential for 5.1 + stereo line-out use cases |
| DC Blocking High-Pass Filter | Configurable per channel to eliminate subsonic content before DDX® modulation, improving amplifier stability |
| Soft Volume Update | Eliminates audible zipper noise during real-time gain changes in live audio applications |
Applications
| Home Theater AV Receiver | Premium Soundbar |
|---|---|
Use Scenario: 7.1-channel decoding and post-processing for HDMI ARC/eARC and optical inputs. IC Role / Device Role / Timing Role: Central digital audio processor handling DSD/SACD input, 5.1-to-2.1 downmix, bass management, and DDX® PWM generation for built-in amplifiers. Use Value: Enables single-chip support for Dolby Atmos metadata passthrough while delivering >100 dB dynamic range and Automode™ night mode for consistent low-volume intelligibility. | Use Scenario: Compact 3.1 or 5.1 virtual surround system with HDMI, Bluetooth, and analog inputs. IC Role / Device Role / Timing Role: Audio hub performing input switching, 5.1-to-2.1 downmix, tone control, and per-channel DDX® timing alignment for driver array coherence. Use Value: Delivers spatial audio enhancement using 10-biquad EQ per channel and variable DDX® delay - eliminating need for external timing calibration hardware. |
| Automotive Infotainment Head Unit | Multi-Zone Residential Audio Controller |
Use Scenario: In-dash system supporting Android Auto, CarPlay, and HD Radio with rear-seat entertainment outputs. IC Role / Device Role / Timing Role: Digital audio router and processor managing 6-channel source input, AM interference suppression, and simultaneous 5.1 + 2-channel outputs. Use Value: Advanced AM interference frequency switching and noise suppression modes maintain clarity in electric vehicle EMI environments without shielding overhead. | Use Scenario: Whole-home audio distribution with zone-specific EQ, volume leveling, and source-independent loudness compensation. IC Role / Device Role / Timing Role: Multi-channel mixer and DSP engine applying Automode™ preset volume curves and dynamic range compression across 8 independent zones. Use Value: 3 preset volume curves and automatic loudness control ensure consistent perceived level across rooms - reducing manual adjustment by end users. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-channel digital audio processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STA339B13TR | Successor with enhanced 24-bit/384 kHz capability, expanded Automode™ presets, and improved THD+N (<0.005%) | Targets next-gen 8K AV receivers requiring higher sample rate support and lower distortion | Choose for new designs needing extended bandwidth and tighter THD specs; not pin-compatible |
| AK4128AEQ | Dedicated 8-channel audio receiver with S/PDIF/I²S interface but no integrated DDX® control or Automode™ | Focused on digital input demuxing and format conversion - requires external DSP for EQ/limiting | Choose when DDX® PWM control is unnecessary and discrete DSP architecture is preferred |
Compared with STA339B13TR, the STA309A13TR offers mature production stability and lower BOM cost for 192 kHz-class systems; versus AK4128AEQ, it provides full turnkey audio processing with embedded DDX® timing and Automode™ - reducing firmware and component count.
Availability
STA309A13TR is available at Aetrix Electronics and suitable for home theater AV receivers, premium soundbars, and automotive infotainment systems requiring stable component supply and long-term production continuity.
Supply support for STA309A13TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, analog, and audio ICs for industrial, automotive, and consumer markets.
The STA309A belongs to ST's DDX® digital audio processor product line, designed specifically to integrate high-fidelity DSP, multi-format digital input support, and Class-D amplifier control into a single chip for cost-sensitive, space-constrained audio systems.
FAQ
What audio formats does the STA309A13TR support on its digital inputs?
The STA309A13TR supports I²S, left-justified, right-justified, and DSD (6-channel SACD) inputs at sample rates from 32 kHz to 192 kHz. It natively accepts 24-bit data and performs internal interpolation to its 192 kHz processing rate. DSD input is converted to PCM for full DSP processing, including EQ and limiting.
Does the STA309A13TR include hardware-based AM radio interference suppression?
Yes - it features dedicated AM interference frequency switching and noise suppression modes activated via register bits (AM2E, NSBW). These dynamically shift PWM carrier frequencies away from AM broadcast bands (530–1710 kHz) and apply notch filtering, significantly reducing audible heterodyne noise in automotive and portable audio applications.
Can the STA309A13TR drive speakers directly, or does it require an external DDX® power stage?
The STA309A13TR is a digital controller only and cannot drive speakers directly. It generates DDX®-formatted PWM signals that must be interfaced with a compatible STMicroelectronics DDX® power device (e.g., STA516B, STA559B) to deliver amplified analog output. Its DOUT pins provide logic-level PWM, not power.
How is Automode™ configured and updated in the field?
Automode™ behavior is controlled entirely via I²C-accessible registers (0x1F–0x21, 0x22–0x27, etc.) and requires no external memory. Presets are stored in internal ROM; user-modified EQ coefficients or volume curves are written to RAM and retained across power cycles only if backed by external EEPROM or MCU firmware. No bootloader or firmware update mechanism is embedded.
STA309A13TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- DDX™
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Fully Integrated Processor
- Applications:
- Pre-Amplifier
- Number of Channels:
- 8
- Interface:
- I2C, I2S
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Specifications:
- Direct Digital Amplification
- Mounting Type:
- Surface Mount
- Grade:
- -
STA309A13TR FAQ
1.How can I place an order for STA309A13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STA309A13TR 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 STA309A13TR reliable?
The price and inventory of STA309A13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STA309A13TR is usually 5 days.
3.What payment methods are accepted for STA309A13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STA309A13TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STA309A13TR?
STA309A13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STA309A13TR 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 STA309A13TR?
For technical support, including STA309A13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STA309A13TR requirements.
6.How does Aetrix verify that STA309A13TR is sourced from the original manufacturer or authorized distributors?
All STA309A13TR 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 STA309A13TR meets industry standards.
7.What is the process for return or replacement of STA309A13TR?
All STA309A13TR units undergo pre-shipment inspection (PSI). If there is an issue with STA309A13TR, 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 STA309A13TR part is unused and in its original packaging.
Return procedure for STA309A13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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