Texas Instruments TLV320AIC26IRHBRG4

Overview

TLV320AIC26IRHBRG4 from Texas Instruments is a low-power, high-performance stereo audio codec IC with integrated 97-dBA DAC, mono 80-dBA ADC, on-chip 325-mW 8-Ω speaker driver, capless headphone amplifier, and programmable digital audio effects (bass/treble/EQ/de-emphasis). It operates at sampling rates up to 48 ksps and supports I²S, DSP, left/right-justified audio interfaces in master or slave mode - deployed in cellular phones and portable media players for full-system audio signal chain integration.

For engineers reviewing the TLV320AIC26IRHBRG4 datasheet, TLV320AIC26IRHBRG4 pinout, TLV320AIC26IRHBRG4 application, or TLV320AIC26IRHBRG4 equivalent, key selection considerations include its dual-supply architecture (AVDD/DRVDD/DVDD/IOVDD), hardware AGC for microphone input, integrated PLL for flexible clock generation from 2–50 MHz MCLK, battery and temperature monitoring capability, and 32-pin QFN package with thermal pad.

Technical Context

The TLV320AIC26IRHBRG4 implements a sigma-delta stereo DAC and mono sigma-delta ADC with decimation/interpolation filtering, supporting independent sampling rates (up to 48 ksps) and programmable interpolation ratios (Fsref/N1, Fsref/N2) for low-rate audio enhancement. Its digital audio interface supports four serial formats (I²S, DSP, left/right-justified) with MSB-first, 16/20/24/32-bit word lengths and configurable master/slave BCLK/LRCK/ADWS timing.

On-chip resources include a 12-bit SAR auxiliary ADC with ±1 µA leakage on VBAT1/VBAT2 inputs (0.5–6 V range), internal 2.5 V/1.25 V reference, 0.3°C-resolution temperature sensor, and SPI-controlled register map for full functional configuration - all managed via a 16-bit register-based architecture with page addressing.

Key Specifications

Pinout & Package

TLV320AIC26IRHBRG4 uses a 32-pin QFN (5 mm × 5 mm, RHB designation) with exposed thermal pad. Package meets −40°C to +85°C industrial operating range and requires PCB thermal vias for sustained 325-mW speaker drive above 70°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV320AIC26IRHBRG4, TLV320AIC3106IRHBR trades speaker drive and battery monitoring for lower power and smaller die size, while WM8960GEFL/V offers marginally better DAC SNR but omits key system-monitoring features essential for battery-powered portable devices.

Availability

TLV320AIC26IRHBRG4 is available at Aetrix Electronics and suitable for cellular handsets, MP3 players, digital cameras, and video camcorders requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TLV320AIC26IRHBRG4 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 connectivity technologies for industrial, automotive, and consumer applications.

The TLV320AIC26IRHBRG4 belongs to TI's portable audio codec product line, designed specifically for space- and power-constrained mobile devices requiring integrated audio conversion, speaker drive, and system monitoring in a single QFN package.

FAQ

What audio interface protocols does the TLV320AIC26IRHBRG4 support?

The TLV320AIC26IRHBRG4 supports I²S, left-justified, right-justified, and DSP serial audio formats with 16/20/24/32-bit word lengths. It operates in master or slave mode, with configurable BCLK, LRCK, and ADWS timing - enabling seamless integration with DSPs, microcontrollers, and application processors across portable audio platforms. All modes are software-selectable via its register map.

Does the TLV320AIC26IRHBRG4 include a built-in speaker amplifier?

Yes, the TLV320AIC26IRHBRG4 integrates a 325-mW bridge-tied load (BTL) speaker driver capable of driving an 8-Ω load directly. This amplifier is powered from the DRVDD rail and is independently controllable via register bits - allowing it to be enabled or disabled without affecting headphone or line outputs. The TLV320AIC26IRHBRG4 datasheet confirms this specification on page 5 under "DAC SPEAKER OUTPUT".

How does the TLV320AIC26IRHBRG4 handle microphone input gain control?

The TLV320AIC26IRHBRG4 implements hardware automatic gain control (AGC) on its MICIN input, with a programmable PGA offering 0–59.5 dB gain in 0.5-dB steps. Gain changes use soft-stepping to avoid audible clicks, and the AGC loop adjusts dynamically based on input level - all without host processor involvement. This behavior is documented in the "MONO AUDIO ADC" section (page 20) of the TLV320AIC26IRHBRG4 datasheet.

Can the TLV320AIC26IRHBRG4 measure battery voltage?

Yes, the TLV320AIC26IRHBRG4 provides two dedicated battery monitor inputs (VBAT1 and VBAT2) supporting 0.5–6 V with 12-bit resolution. These inputs connect directly to battery terminals and operate with ±1 µA leakage current, enabling accurate voltage telemetry without external components. The auxiliary SAR ADC converts these inputs and reports results via SPI - detailed in the "BATTERY MONITOR INPUTS" table (page 4) of the TLV320AIC26IRHBRG4 datasheet.

What is the function of the VGND pin on the TLV320AIC26IRHBRG4?

The VGND pin on the TLV320AIC26IRHBRG4 is a virtual ground output that supplies a stable mid-supply voltage (typically AVDD/2) to serve as the return path for capless headphone operation. When enabled via register bit D8 (REG−05H/Page2), VGND eliminates the need for DC-blocking capacitors on HPL and HPR outputs - reducing component count, PCB area, and low-frequency distortion. This feature is explicitly described in the "OPERATION−AUDIO CODEC" section (page 16) of the TLV320AIC26IRHBRG4 datasheet.