Texas Instruments TLV320AIC3120IRHBR

Overview

TLV320AIC3120IRHBR from Texas Instruments is a low-power mono audio codec integrating a 24-bit mono DAC (95-dB SNR), mono ADC (90-dB SNR), programmable miniDSP, and mono Class-D BTL speaker amplifier delivering 2.5 W into 4 Ω. It supports sample rates from 8 kHz to 192 kHz, features I²C control, and operates across analog (2.7–3.6 V), digital core (1.65–1.95 V), I/O (1.1–3.6 V), and Class-D (2.7–5.5 V) supply rails. It targets space-constrained portable audio systems requiring integrated signal processing and efficient power delivery.

For engineers reviewing the TLV320AIC3120IRHBR datasheet, TLV320AIC3120IRHBR pinout, TLV320AIC3120IRHBR application, or TLV320AIC3120IRHBR equivalent, key selection considerations include its mono audio path architecture, embedded miniDSP programmability, Class-D output capability with configurable gain, dual-domain power supply requirements, and 32-pin VQFN (5 mm × 5 mm) thermal performance (R_θJA = 32.7°C/W).

Technical Context

The TLV320AIC3120IRHBR implements a fully programmable miniDSP with user-configurable biquad and FIR filters, DRC, bass/treble/EQ (up to 5 biquads for record, 6 for playback), and digital mixing. Its audio interface supports I²S, left/right-justified, DSP, and TDM modes in master or slave configuration.

It integrates a microphone interface with bias, PGA (0–59.5 dB gain), AGC, and three single-ended or one differential input channel; headphone/lineout drivers (0–9 dB gain); and a Class-D speaker driver with 6–24 dB gain in 6-dB steps. Clocking uses an on-chip PLL accepting MCLK, BCLK, or GPIO1 as input for flexible system synchronization.

Key Specifications

Pinout & Package

The TLV320AIC3120IRHBR is housed in a 5.0 mm × 5.0 mm, 32-pin VQFN (RHB) package with exposed thermal pad for enhanced heat dissipation. Pin numbering follows top-view layout per TI SLAS653C Rev C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV320AIC3111IRHBR and PCM3168AIPFPR, the TLV320AIC3120IRHBR uniquely combines mono audio conversion, Class-D speaker drive, and instruction-programmable miniDSP in a single 5-mm QFN - making it the only option among the three that delivers complete audio subsystem functionality without external components.

Availability

TLV320AIC3120IRHBR is available at Aetrix Electronics and suitable for portable audio devices, mobile internet devices, eBooks, and adaptive filtering applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV320AIC3120IRHBR 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, with decades of expertise in precision audio signal chains and low-power mixed-signal design.

The TLV320AIC3120IRHBR belongs to TI's low-power audio codec product line, engineered specifically for battery-operated portable devices needing integrated analog front-end, digital processing, and Class-D amplification in minimal footprint.

FAQ

What is the maximum output power of the TLV320AIC3120IRHBR Class-D amplifier?

The TLV320AIC3120IRHBR Class-D amplifier delivers up to 2.5 W into a 4-Ω load when SPKVDD = 5.5 V and class-D gain is set to 18 dB with 10% THD. At SPKVDD = 3.6 V, maximum output is 1 W into 4 Ω. The device also supports 1.6 W into 8 Ω at 5.5 V. These values are measured differentially across SPKP and SPKM pins under BTL configuration, as specified in the SLAS653C datasheet Section 5.5.

Does the TLV320AIC3120IRHBR support stereo audio interfaces?

No, the TLV320AIC3120IRHBR is a mono audio codec: it contains one DAC and one ADC channel. However, its digital audio interface (I²S, TDM, DSP, etc.) supports stereo-format data streams - meaning it can receive or transmit left/right channel data, but internally processes only one channel. For true stereo conversion, TI recommends the TLV320AIC3111IRHBR or PCM3168AIPFPR instead.

Can the TLV320AIC3120IRHBR operate with a single 3.3-V supply?

No - the TLV320AIC3120IRHBR requires four independent supply domains: AVDD (2.7–3.6 V), DVDD (1.65–1.95 V), IOVDD (1.1–3.6 V), and SPKVDD (2.7–5.5 V). While AVDD, HPVDD, and IOVDD may share a 3.3-V rail in some designs, DVDD must remain within its strict 1.65–1.95 V range to prevent register corruption, and SPKVDD must be ≥AVDD. Proper sequencing (DVDD powered before AVDD) is mandatory per Section 9 of SLAS653C.

How is the miniDSP in the TLV320AIC3120IRHBR programmed?

The TLV320AIC3120IRHBR miniDSP is programmed via I²C writes to its PRB (Programmable Resource Block) registers (Page 0 Registers 82–93, 116–117, etc.), using TI-provided tools like PurePath Studio or custom scripts. Users configure biquad coefficients, FIR taps, DRC parameters, and routing matrices. The miniDSP executes instructions autonomously after loading - no host processor involvement is needed during audio processing, enabling deterministic low-latency operation.

What are the thermal limitations of the TLV320AIC3120IRHBR in continuous operation?

The TLV320AIC3120IRHBR has a maximum junction temperature (T_J) of 105°C and R_θJA = 32.7°C/W when mounted on a JEDEC-standard 4-layer PCB with thermal pad soldered. At ambient 70°C, maximum allowable power dissipation drops to 1 W (per Section 5.6). To sustain full 2.5-W Class-D output, board-level thermal design must include ≥200 mm² copper pour under the exposed pad and optional airflow or heatsinking - especially when SPKVDD > 4.3 V.