Texas Instruments TLV320AIC31IRHBRG4

Overview

TLV320AIC31IRHBRG4 from Texas Instruments is a low-power stereo audio codec IC integrating stereo 24-bit delta-sigma DAC (100-dB A-weighted SNR), stereo ADC (92-dB A-weighted SNR), six analog input channels, four high-power output drivers (500 mW/channel into 8 Ω BTL), and programmable microphone bias for portable telephony and audio playback/recording systems.

For engineers reviewing the TLV320AIC31IRHBRG4 datasheet, TLV320AIC31IRHBRG4 pinout, TLV320AIC31IRHBRG4 application, or TLV320AIC31IRHBRG4 equivalent, key selection criteria include its 14-mW 48-kHz stereo playback power, I²C control interface, flexible audio serial bus (I²S/LJ/RJ/DSP/TDM), and QFN-32 package with integrated AGC, EQ, and headphone/speaker drive capability.

Technical Context

The TLV320AIC31IRHBRG4 implements dual delta-sigma modulation paths: a stereo DAC with digital filtering for 3D/bass/treble/EQ/de-emphasis effects and a stereo ADC preceded by two programmable-gain amplifiers (0 to +59.5 dB in 0.5-dB steps). Its clock architecture includes a highly programmable PLL supporting MCLK inputs from 512 kHz to 50 MHz to generate precise audio sample rates (8–96 kHz).

Signal routing is fully configurable via register-based mix/mux: analog inputs (IN1L/R±, IN2L/R) feed the ADC path with selectable gain and attenuation; DAC and selected analog inputs feed four high-power outputs (HPLOUT/HPRCOM/HPROUT/HPLCOM) and two differential line outputs (LEFT_LOP/M/RIGHT_LOP/M), all under independent volume control.

Key Specifications

Pinout & Package

TLV320AIC31IRHBRG4 is housed in a 5 mm × 5 mm, 32-pin QFN package with exposed thermal pad (RHB suffix), optimized for compact portable PCB layouts and thermal dissipation in battery-powered systems.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar stereo audio codec applications.

Compared with TLV320AIC32IRHBR and WM8960EGEFL/V, TLV320AIC31IRHBRG4 offers the best balance of low-power operation (14 mW), programmable clocking, and integrated AGC-making it ideal for battery-constrained portable systems needing flexible, self-contained audio processing.

Availability

TLV320AIC31IRHBRG4 is available at Aetrix Electronics and suitable for smartphone voice subsystems, portable media players, VoIP handsets, and industrial handheld terminals requiring stable component supply and long-term production continuity.

Supply support for TLV320AIC31IRHBRG4 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 and embedded processing technologies, with decades of leadership in precision audio signal chains and low-power system solutions.

The TLV320AIC31IRHBRG4 belongs to TI's low-power audio codec product line, designed specifically for space- and energy-constrained portable electronics requiring integrated analog front-end functionality without external support components.

FAQ

What is the minimum required hardware reset sequence for TLV320AIC31IRHBRG4?

The TLV320AIC31IRHBRG4 requires an active-low hardware reset pulse of ≥10 ns applied to the RESET pin after all power supplies (AVDD, DRVDD, DVDD, IOVDD) have stabilized within specification. Failure to perform this reset may result in non-responsive I²C communication or undefined register states. The TLV320AIC31IRHBRG4 must be reset before any register access to ensure proper initialization of its dual-page register map.

Does TLV320AIC31IRHBRG4 support capless headphone output configurations?

Yes, TLV320AIC31IRHBRG4 supports capless (DC-coupled) headphone drive using its HPLCOM and HPRCOM pins configured as virtual ground references. It offers four programmable common-mode voltage settings (1.35 V, 1.50 V, 1.65 V, 1.80 V) to match system requirements. This eliminates bulky AC-coupling capacitors, reducing PCB area and cost-especially valuable in ultra-thin mobile designs where TLV320AIC31IRHBRG4 is commonly deployed.

What audio serial interface modes does TLV320AIC31IRHBRG4 support?

TLV320AIC31IRHBRG4 supports I²S, left-justified, right-justified, DSP, and TDM audio serial data formats via its programmable BCLK/WCLK/DIN/DOUT interface. Mode selection is register-controlled and independent of the I²C control bus. This flexibility allows seamless integration with diverse host processors-including baseband SoCs, application processors, and DSPs-without requiring external format translation logic in the TLV320AIC31IRHBRG4 signal path.

Can TLV320AIC31IRHBRG4 drive 8-Ω speakers directly?

Yes, TLV320AIC31IRHBRG4 can drive 8-Ω speakers directly in bridge-tied-load (BTL) configuration using HPLOUT/HPLCOM and HPROUT/HPRCOM pairs, delivering up to 500 mW per channel at 3.3-V supply. This eliminates the need for external Class-D or Class-AB speaker amplifiers in compact portable systems. Thermal performance is validated for continuous operation at +85°C ambient with appropriate PCB copper pour, as specified in the TLV320AIC31IRHBRG4 datasheet.

How does the programmable PLL in TLV320AIC31IRHBRG4 simplify clocking in portable designs?

The TLV320AIC31IRHBRG4 integrates a highly programmable PLL that accepts MCLK inputs from 512 kHz to 50 MHz and generates precise audio sample clocks (8–96 kHz) internally-eliminating the need for multiple crystals or external clock generators. It natively supports common system clocks (12 MHz, 13 MHz, 16 MHz, 19.2 MHz), reducing bill-of-materials and board space while maintaining jitter performance critical for high-SNR audio. This PLL is essential to the low-power, single-chip architecture of TLV320AIC31IRHBRG4.