Texas Instruments TLV320AIC3268IRGCR

Overview

TLV320AIC3268IRGCR from Texas Instruments is a low-power stereo audio codec IC integrating 105dB DAC, 95dB ADC, DirectPath™ headphone driver (24 mW), Class-D speaker amplifier (1.45 W @ 8Ω), and fully programmable miniDSP. It supports 8–192 kHz sample rates, eight analog inputs (single-ended or four fully differential), and three independent digital audio serial interfaces with TDM/PCM support - deployed in portable consumer audio and infotainment systems.

For engineers reviewing the TLV320AIC3268IRGCR datasheet, TLV320AIC3268IRGCR pinout, TLV320AIC3268IRGCR application, or TLV320AIC3268IRGCR equivalent, key selection criteria include its integrated Class-D + DirectPath™ dual-output architecture, SAR ADC for battery sensing and capacitive touch, I²C/SPI configurability, and QFN-64 package with separate I/O voltage domains for flexible system interfacing.

Technical Context

The TLV320AIC3268IRGCR implements a multi-domain audio signal path with three independent ASIs supporting up to 8-channel input/output, configurable terminal multiplexing, and a PLL for clock synthesis from 0.512–20 MHz inputs. Its miniDSP engine enables real-time FIR/IIR filtering, dynamic range compression, and custom audio effects without host CPU intervention.

It integrates four digital microphone inputs alongside eight analog inputs, a 12-bit SAR ADC with auxiliary high-impedance channels for capacitive sensor measurement (IN1L_AUX1/IN1R_AUX2), and dual power domains (IOVDD1/IOVDD2) enabling mixed-voltage digital interface operation at 1.1–3.6 V.

Key Specifications

Pinout & Package

VQFN-64 (RGC) package, 9 mm × 9 mm, 0.5 mm pitch, exposed thermal pad. Designed for low-inductance grounding and thermal dissipation in space-constrained portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV320AIC3268IRGCR, TLV320AIC3256IRGCR removes speaker amplification and SAR functionality but retains identical pinout and software compatibility, whereas WM8960GEFL/V offers higher headphone output power in a smaller package but lacks both miniDSP and auxiliary ADC capabilities - making TLV320AIC3268IRGCR uniquely suited for feature-rich, space-constrained portable audio with integrated sensing.

Availability

TLV320AIC3268IRGCR is available at Aetrix Electronics and suitable for smartphone audio subsystems, wireless headset base stations, automotive infotainment displays, and portable Bluetooth speakers requiring stable component supply and long-term production continuity.

Supply support for TLV320AIC3268IRGCR 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 company specializing in analog and embedded processing technologies, with leadership in precision analog, power management, and signal chain solutions.

The TLV320AIC3268 belongs to TI's low-power audio codec product line, designed specifically for battery-operated portable devices requiring high-fidelity audio, integrated amplification, and intelligent on-chip signal processing - reducing host processor load and system-level component count.

FAQ

What is the maximum output power of the Class-D amplifier in TLV320AIC3268IRGCR?

The TLV320AIC3268IRGCR Class-D amplifier delivers 1.45 W into an 8 Ω load at 5 V supply with 10% THD+N, and 1.15 W at 1% THD+N. This output is achieved differentially across SPKP and SPKM pins, supporting efficient, low-EMI speaker drive without external passive filtering.

Does TLV320AIC3268IRGCR support capacitive touch sensing?

Yes, TLV320AIC3268IRGCR supports capacitive touch sensing via its programmable 12-bit SAR ADC and dedicated high-impedance auxiliary inputs IN1L_AUX1 and IN1R_AUX2. These pins are explicitly specified for capacitive sensor measurement in the datasheet and require no external components beyond decoupling capacitors.

Can TLV320AIC3268IRGCR operate with multiple I/O voltage domains?

Yes, TLV320AIC3268IRGCR supports two independent digital I/O supply domains: IOVDD1_33 and IOVDD2_33, each configurable from 1.1 V to 3.6 V. This allows concurrent interfacing with mixed-voltage systems - for example, connecting to a 1.8 V application processor via ASI 1 and a 3.3 V Bluetooth SoC via ASI 2.

What sample rates does TLV320AIC3268IRGCR support for playback and recording?

TLV320AIC3268IRGCR supports a continuous sample rate range from 8 kHz to 192 kHz for both playback and recording. This includes standard rates like 44.1 kHz and 48 kHz, as well as high-resolution formats such as 96 kHz and 192 kHz, enabled by its flexible PLL and ASI clocking architecture.

How does the DirectPath™ headphone driver in TLV320AIC3268IRGCR improve system design?

The DirectPath™ headphone driver in TLV320AIC3268IRGCR eliminates the need for DC-blocking output capacitors by providing true ground-referenced single-ended outputs (HPL/HPR). This reduces BOM cost and PCB area, improves low-frequency response below 20 Hz, and prevents pop/click artifacts during plug/unplug events - critical for premium portable audio experiences.