Texas Instruments TLV320A3254IRHBRG4

Overview

TLV320A3254IRHBRG4 from Texas Instruments is a low-power stereo audio codec IC with embedded miniDSP, 93dB SNR ADC, 100dB SNR DAC, and programmable analog front-end supporting six single-ended or three differential inputs. It operates at 48ksps with 4.1mW DAC playback and 6.1mW ADC recording, targeting portable media players and mobile handsets.

For engineers reviewing the TLV320A3254IRHBRG4 datasheet, TLV320A3254IRHBRG4 pinout, TLV320A3254IRHBRG4 application, or TLV320A3254IRHBRG4 equivalent, key selection criteria include its PowerTune™ adaptive power scaling, integrated PLL for flexible clock generation, dual I2S interfaces, and configurable microphone bias (0–3.3V) with up to 3mA sourcing capability.

Technical Context

The TLV320A3254IRHBRG4 integrates independent left/right ADC and DAC signal paths with dedicated DRC, AGC, and volume control blocks-each supporting 0.5dB gain steps (ADC) and 1dB steps (DAC). Its miniDSP enables real-time audio processing including equalization, mixing, and dynamic range compression without host CPU intervention.

Digital interface flexibility includes primary/secondary I2S, SPI, and I2C control modes selected via SPI_SELECT pin; clock routing supports MCLK/BCLK/WCLK synchronization across multiple audio domains. The device uses a fractional-N PLL to generate internal clocks from 0.512–20MHz input, enabling precise sample rate synthesis for 8–96kHz audio streams.

Key Specifications

Pinout & Package

VQFN-32 package with 5.0 mm × 5.0 mm body size and exposed thermal pad connected to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV320A3254IRHBRG4, TLV320AIC3204IRHBR removes miniDSP functionality while retaining identical power, SNR, and interface compatibility - making it a lower-cost alternative when host-based processing suffices. TLV320AIC3256IRHBT adds ground-centered HP drivers for capless operation but increases supply voltage requirements and alters analog output architecture.

Availability

TLV320A3254IRHBRG4 is available at Aetrix Electronics and suitable for portable media players, mobile handsets, and navigation devices requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.

Supply support for TLV320A3254IRHBRG4 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 expertise in precision audio signal chains and low-power system solutions.

The TLV320A3254IRHBRG4 belongs to TI's ultra-low-power audio codec product line, designed specifically for battery-powered portable electronics demanding high-fidelity audio, minimal power draw, and integrated digital signal processing.

FAQ

What is the maximum supported sample rate for TLV320A3254IRHBRG4?

The TLV320A3254IRHBRG4 supports audio sample rates from 8kHz to 96kHz. Its fractional-N PLL accepts MCLK inputs from 0.512MHz to 20MHz and generates precise internal clocks for all standard rates including 44.1kHz and 48kHz. At DVDD ≥1.65V, the PLL enables full-rate operation; below that threshold, only integer clock division is available per SLAA408 guidelines.

Does TLV320A3254IRHBRG4 support digital microphones?

Yes, TLV320A3254IRHBRG4 supports PDM digital microphones via DIN/MFP1 and SCLK/MFP3 pins. It provides programmable PDM clock output (up to 3.072MHz) and built-in decimation filters to convert PDM streams to PCM at standard audio rates. The device can simultaneously process up to two PDM microphone inputs alongside analog channels.

How does the PowerTune™ feature reduce power in TLV320A3254IRHBRG4?

PowerTune™ dynamically scales TLV320A3254IRHBRG4's internal clock frequencies and block activation based on active signal paths and sample rate. For example, during mono playback at 8kHz, unused ADC channels, miniDSP sections, and high-speed logic are gated off - reducing total power from 6.1mW (stereo 48ksps record) to under 2mW while preserving audio fidelity.

Can TLV320A3254IRHBRG4 operate without an external crystal?

Yes, TLV320A3254IRHBRG4 can operate without an external crystal by using an external oscillator connected to MCLK, or by accepting a master clock from the host processor. Its integrated PLL synthesizes all required internal clocks (e.g., bit clocks, word clocks) from this single reference, eliminating need for separate crystal oscillators or clock generators in most portable designs.

What are the headphone output capabilities of TLV320A3254IRHBRG4?

TLV320A3254IRHBRG4 delivers 64mW per channel into 16Ω loads when powered from LDOIN = 3.3V, and 15mW per channel when powered from AVDD = 1.8V. It supports both single-ended (HPL/HPR) and differential (HPL–HPR) drive modes, with programmable gain from –30dB to 0dB in 1dB steps and mute attenuation exceeding 122dB.