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Texas Instruments PCM3793RHBT
- Part No.:
- PCM3793RHBT
- Manufacturer:
- Texas Instruments
- Category:
- CODECS
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
PCM3793RHBT.pdf
- Description:
- IC STEREO AUD CODEC 16BIT 32-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,688
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Product details
Overview
PCM3793RHBT from Texas Instruments is a 16-bit stereo audio CODEC with integrated Class-D digital speaker amplifier, headphone amplifier, microphone bias, analog mixing, and 3-band tone control. It delivers 700 mW + 700 mW speaker output into 8 Ω, 40 mW + 40 mW headphone output into 16 Ω, and supports 5–50 kHz sampling rates. It targets portable audio systems requiring low-power, multi-path analog signal routing and embedded sound enhancement.
For engineers reviewing the PCM3793RHBT datasheet, PCM3793RHBT pinout, PCM3793RHBT application, or PCM3793RHBT equivalent, this page provides verified functional specifications, validated terminal roles, confirmed package mapping to 32-pin QFN (RHB), and two technically documented alternative parts for portable audio CODEC selection - all derived from TI SLES193C revision FEBRUARY 2007.
Technical Context
The PCM3793RHBT integrates delta-sigma ADC and DAC with programmable analog front-end gain (–12 dB to +30 dB), digital interpolation/decimation filters, and configurable high-pass/notch filters. Its dual-path architecture supports simultaneous analog mixing (bypassing ADC/DAC) and full digital signal processing including 3-D sound, de-emphasis, and automatic level control (ALC).
Control is implemented via 2-wire I²C or 3-wire SPI interface, with register-accessible configuration of speaker BTL outputs (SPOLP/SPOLN/SPORP/SPORN), headphone plug detection (HDTI), and power-up sequencing per module. The device operates from four independent supply domains: VIO/VDD (1.71–3.6 V), VCC (2.4–3.6 V), and VPA (2.4–3.6 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - Ensures CD-quality audio fidelity with 93 dB DAC dynamic range and 90 dB ADC dynamic range. |
| Sampling Rate | 5–50 kHz - Supports voice recording (5–16 kHz), standard audio (44.1/48 kHz), and ultrasonic applications up to 50 kHz. |
| Speaker Output | 700 mW + 700 mW @ 8 Ω - Enables direct drive of stereo speakers without external amplifiers in battery-powered devices. |
| Headphone Output | 40 mW + 40 mW @ 16 Ω - Delivers sufficient drive for capless or capacitor-coupled headphones in portable form factors. |
| Power Dissipation | 7 mW playback / 13 mW record @ 1.8 V/2.4 V - Optimized for extended battery life in PMPs, DSCs, and cellular handsets. |
| Supply Voltages | VIO/VDD: 1.71–3.6 V; VCC/VPA: 2.4–3.6 V - Allows flexible power domain partitioning for noise isolation and voltage scaling. |
| Operating Temp | –40°C to +85°C - Qualified for industrial-grade operation in handheld consumer electronics across global climates. |
Pinout & Package
PCM3793RHBT is housed in a 5-mm × 5-mm, 32-pin QFN package (RHB) with exposed thermal pad. Pin numbering follows top-view orientation with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BCK | Serial bit clock input/output | Synchronizes audio data transfer between PCM3793RHBT and host processor; supports I²S, left/right-justified, DSP formats. |
| DIN | Digital audio input | Receives PCM data stream from baseband or audio DSP; compatible with CMOS logic levels (VIO-referenced). |
| DOUT | Digital audio output | Transmits digitized microphone or line input to host; supports 16-bit MSB-first, two's complement format. |
| HPOL/LOL | Headphone/line output (L) | Configurable as stereo headphone driver (capless or AC-coupled) or line-level output (10 kΩ load); volume programmable from 6 dB to –70 dB. |
| HPOR/LOR | Headphone/line output (R) | Right-channel counterpart to HPOL/LOL; shares same gain, mute, and capless mode control registers. |
| SPOLP/SPOLN | Speaker output L+ / L– | Differential BTL outputs for left speaker; deliver 700 mW into 8 Ω; include thermal shutdown and short-circuit protection. |
| SPORP/SPORN | Speaker output R+ / R– | Differential BTL outputs for right speaker; functionally identical to SPOLP/SPOLN with independent volume control. |
| MICB | Microphone bias source | Provides 0.75×VCC bias voltage with 2 mA sourcing capability for electret condenser microphones. |
| HDTI | Headphone detect input | Monitors mechanical insertion of 3-pole or 4-pole jack; triggers automatic enable/disable of headphone/speaker amplifiers via register 75 (HPDE). |
| MODE | Interface select | Logic HIGH selects I²C (2-wire); LOW selects SPI (3-wire); determines MC/SCL and MD/SDA pin functionality. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Class-D speaker amplifier | Eliminates external LC filter and heat sink; enables 700 mW/channel output with >85% efficiency at 3.6 V. |
| Capless headphone output | Removes need for DC-blocking capacitors in space-constrained designs; reduces BOM cost and PCB area. |
| Programmable analog mixing path | Routes analog inputs (AIN1–AIN3) directly to headphone/speaker outputs without ADC/DAC conversion - ideal for FM radio or auxiliary analog sources. |
| Three-band tone control (bass/mid/treble) | Adjusts frequency response ±12 dB in 1-dB steps per band; prevents clipping via automatic input attenuation (LPAE) on bass boost. |
| Configurable high-pass and notch filters | Enables dc offset removal (4 Hz or 240 Hz cutoff) and targeted noise cancellation (e.g., CCD motor hum) via register-programmed center frequency and bandwidth. |
Applications
| Portable Audio Player | Cellular Phone |
|---|---|
Use Scenario: Standalone MP3/WMA playback with stereo speaker output and wired headphone support. IC Role / Device Role / Timing Role: Single-chip audio subsystem handling DAC, speaker amplification, headphone drive, analog mixing for line-in, and tone enhancement. Use Value: Reduces system component count by integrating 16-bit CODEC, 700-mW Class-D amplifier, and capless headphone driver in 5×5 mm QFN. | Use Scenario: Voice call audio path with microphone preamplification, ALC, speakerphone output, and headset detection. IC Role / Device Role / Timing Role: Full-duplex audio transceiver managing analog mic input (with 20 dB boost), ALC compression/expansion, and dual-output routing (speaker + headset). Use Value: Enables automatic headphone plug detection (HDTI) and seamless switching between speakerphone and headset modes without host CPU intervention. |
| Video Camcorder | Digital Still Camera |
Use Scenario: Stereo audio recording during video capture with wind-noise suppression and analog mic bias. IC Role / Device Role / Timing Role: High-SNR ADC front-end (90 dB DR) with programmable PGA (–12 dB to +30 dB), microphone bias (MICB), and dual-notch filtering for mechanical noise rejection. Use Value: Supports differential mic input (AIN1L/R) and configurable high-pass filter (4 Hz cutoff) to eliminate low-frequency vibration artifacts in handheld recording. | Use Scenario: Playback of recorded audio clips or voice memos using internal speaker and/or earpiece. IC Role / Device Role / Timing Role: Low-power playback engine with 7 mW consumption at 1.8 V, capless headphone output, and 3-D sound effect for immersive playback experience. Use Value: Extends battery life in compact camera bodies while delivering rich audio through integrated speaker amplifier and spatial enhancement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stereo audio CODEC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCM3794RHBT | Omits speaker amplifier outputs (SPOLP/SPOLN/SPORP/SPORN); identical pinout and register map otherwise. | Suitable only where speaker output is unnecessary; requires external amplifier for speaker drive. | Select PCM3794RHBT when system uses separate Class-D amplifier or omits speaker functionality to reduce power and thermal load. |
| TLV320AIC3106IRHBT | Lower power (5 mW playback), 94 dB DAC SNR, no integrated speaker amplifier, but adds stereo Class-G headphone amp and enhanced ALC algorithms. | Targeted at ultra-low-power voice-centric devices; lacks BTL speaker outputs but offers better THD+N at low volumes. | Choose TLV320AIC3106IRHBT for voice-focused applications requiring longer battery life and superior voice-call SNR, accepting external speaker amplification. |
Compared with PCM3793RHBT, PCM3794RHBT removes speaker drive capability while retaining identical audio processing and interface features, whereas TLV320AIC3106IRHBT trades integrated speaker amplification for lower power and higher-fidelity voice processing - making each alternative optimal for distinct subsystem requirements.
Availability
PCM3793RHBT is available at Aetrix Electronics and suitable for portable audio player, cellular phone, video camcorder, and digital still camera applications requiring stable component supply, long-term lifecycle support, and qualified industrial temperature range (–40°C to +85°C).
Supply support for PCM3793RHBT 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 U.S.-based semiconductor company specializing in analog, embedded processing, and digital signal technologies for industrial, automotive, and consumer markets.
The PCM3793RHBT belongs to TI's portable audio CODEC product line, designed specifically for battery-powered multimedia devices needing integrated analog signal conditioning, low-power digital audio conversion, and embedded sound enhancement without external amplifiers.
FAQ
What is the primary function of the PCM3793RHBT in an audio system?
The PCM3793RHBT serves as a complete stereo audio subsystem IC, integrating a 16-bit ADC/DAC, microphone bias generator, programmable gain amplifiers, analog mixing paths, headphone and Class-D speaker amplifiers, and digital audio effects (3-D sound, tone control, ALC). In a typical design, PCM3793RHBT replaces multiple discrete components - reducing board space, power consumption, and system complexity while enabling feature-rich audio in portable devices.
Does the PCM3793RHBT support capless headphone output?
Yes, the PCM3793RHBT supports capless headphone output on HPOL/LOL and HPOR/LOR pins. This is enabled via register 74 (HPS[2:0]) and eliminates the need for external DC-blocking capacitors - saving PCB area and BOM cost. The capless mode maintains 0.5×VCC common-mode voltage and delivers 40 mW per channel into 16 Ω loads with THD+N < 0.03% at full scale, as verified in TI SLES193C electrical characteristics tables.
How does the PCM3793RHBT handle headphone plug detection?
The PCM3793RHBT uses the HDTI pin to monitor mechanical insertion of 3-pole or 4-pole headphone jacks. Detection status is latched into register 77 (HPDS), and polarity can be inverted via register 75 (HPDP). When HPDE = 1 in register 75, the device automatically disables speaker amplifiers and enables headphone drivers upon plug insertion - a hardware-assisted feature that requires no host polling or GPIO interrupt handling. This behavior is fully documented in the "Headphone Plug Insertion Detection" section of the PCM3793RHBT datasheet.
What are the key differences between PCM3793RHBT and PCM3794RHBT?
The PCM3793RHBT and PCM3794RHBT share identical pinout, register map, and core audio functions (ADC/DAC, headphone amp, analog mixing, tone control), but PCM3793RHBT includes four dedicated speaker amplifier outputs (SPOLP/SPOLN/SPORP/SPORN) while PCM3794RHBT replaces those pins with NC (no-connect) terminals. As confirmed in TI's pin assignment diagrams and Table 1, PCM3794RHBT cannot drive speakers directly and requires an external amplifier - making PCM3793RHBT the only choice when integrated BTL speaker drive is required.
Is the PCM3793RHBT recommended for new designs?
No - the PCM3793RHBT is marked "Not Recommended for New Designs" in its official TI datasheet (SLES193C, February 2007 revision). This designation indicates TI no longer promotes it for initial design-in, though it remains available for legacy support and existing production. Engineers evaluating alternatives should consider TI's newer audio CODECs such as TLV320AIC3106IRHBT or TAS2557YFFT for improved power efficiency, enhanced features, and active lifecycle support - while verifying compatibility with existing PCM3793RHBT firmware and layout constraints.
PCM3793RHBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- Stereo Audio
- Data Interface:
- Serial
- Resolution (Bits):
- 16 b
- Number of ADCs / DACs:
- 2 / 2
- Sigma Delta:
- Yes
- S/N Ratio, ADCs / DACs (db) Typ:
- 90 / 93
- Dynamic Range, ADCs / DACs (db) Typ:
- 90 / 93
- Voltage - Supply, Analog:
- 2.4V ~ 3.6V
- Voltage - Supply, Digital:
- 1.71V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (5x5)
PCM3793RHBT FAQ
1.How can I place an order for PCM3793RHBT through Aetrix?
Please submit a Request for Quotation (RFQ) for PCM3793RHBT 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 PCM3793RHBT reliable?
The price and inventory of PCM3793RHBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCM3793RHBT is usually 5 days.
3.What payment methods are accepted for PCM3793RHBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCM3793RHBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCM3793RHBT?
PCM3793RHBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCM3793RHBT 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 PCM3793RHBT?
For technical support, including PCM3793RHBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCM3793RHBT requirements.
6.How does Aetrix verify that PCM3793RHBT is sourced from the original manufacturer or authorized distributors?
All PCM3793RHBT 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 PCM3793RHBT meets industry standards.
7.What is the process for return or replacement of PCM3793RHBT?
All PCM3793RHBT units undergo pre-shipment inspection (PSI). If there is an issue with PCM3793RHBT, 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 PCM3793RHBT part is unused and in its original packaging.
Return procedure for PCM3793RHBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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