Texas Instruments TLV320AIC32IRHBTG4

Overview

TLV320AIC32IRHBTG4 from Texas Instruments is a low-power stereo audio CODEC with integrated stereo headphone amplifier, six analog input channels, four high-power output drivers, and fully differential line outputs. It delivers 14-mW stereo 48-kHz playback at 3.3-V analog supply, supports 8–96 kHz sampling rates, and features programmable microphone bias, AGC, and digital audio effects (3D/bass/treble/EQ/de-emphasis). It targets portable audio/telephony systems such as smartphones and PDAs.

For engineers reviewing the TLV320AIC32IRHBTG4 datasheet, TLV320AIC32IRHBTG4 pinout, TLV320AIC32IRHBTG4 application, or TLV320AIC32IRHBTG4 equivalent, key selection considerations include its 32-pin QFN package, I²C control interface, dual-supply architecture (AVDD: 2.7–3.6 V; DVDD: 1.65–1.95 V), 92-dB ADC SNR, 100-dB DAC SNR, and capless 16-Ω headphone drive capability.

Technical Context

The TLV320AIC32IRHBTG4 integrates stereo delta-sigma ADCs and DACs with independent programmable gain amplifiers (0 to +59.5 dB in 0.5-dB steps for ADC; up to 9-dB programmable gain for headphone outputs) and a highly configurable PLL supporting MCLK inputs from 512 kHz to 50 MHz. Its audio serial data bus supports I²S, left/right-justified, DSP, and TDM modes with BCLK/WCLK/DIN/DOUT signaling.

Power management includes register-based modular control enabling ultra-low-power operation: 14 mW for stereo DAC playback, 2 mA for mono ADC recording, and 0.1 µA in full power-down mode. The device implements two-page register mapping (Page 0 and Page 1), accessed via I²C address 0x18 (7-bit), requiring hardware reset (RESETB low ≥10 ns) after power stabilization.

Key Specifications

Pinout & Package

TLV320AIC32IRHBTG4 is housed in a 5 × 5 mm, 32-pin QFN package with exposed thermal pad (RHB designation), optimized for thermal dissipation in compact portable PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV320AIC32IRHBTG4, TLV320AIC3101IRHBT offers lower system cost and power but sacrifices headphone drive and sample-rate flexibility, while PCM3168APFPR provides superior SNR and channel count at the expense of integration density and embedded audio processing features.

Availability

TLV320AIC32IRHBTG4 is available at Aetrix Electronics and suitable for smartphone audio subsystems, PDA voice recording modules, portable media players, and VoIP handsets requiring stable component supply and long-term production continuity.

Supply support for TLV320AIC32IRHBTG4 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.

The TLV320AIC32 product line was designed specifically for battery-powered portable electronics, integrating high-fidelity audio conversion, intelligent power management, and compact packaging to reduce total system cost and footprint.

FAQ

What is the minimum hardware reset pulse width required for reliable initialization of the TLV320AIC32IRHBTG4?

The TLV320AIC32IRHBTG4 requires an active-low RESETB pulse of at least 10 nanoseconds after all power supplies (AVDD, DRVDD, DVDD, IOVDD) have stabilized within specification. Failure to meet this timing may result in undefined register states or failure to respond to I²C commands. This requirement is explicitly defined in the device's recommended operating conditions table and applies regardless of clock source or sampling rate configuration.

Does the TLV320AIC32IRHBTG4 support capless headphone output, and what load configurations are verified?

Yes, the TLV320AIC32IRHBTG4 supports capless (DC-coupled) stereo headphone output driving up to 30 mW per channel into 16 Ω loads, as confirmed in the Electrical Characteristics table under "STEREO HEADPHONE DRIVER" section. It also supports AC-coupled configurations with 32 Ω loads delivering 15 mW. The device provides four programmable output common-mode voltage options (1.35 V, 1.50 V, 1.65 V, 1.80 V) to optimize THD+N performance across different load types.

What are the supported audio serial data bus formats for the TLV320AIC32IRHBTG4, and how are they configured?

The TLV320AIC32IRHBTG4 supports I²S, left-justified, right-justified, DSP, and TDM audio serial data formats. Configuration is performed via register writes to the AUDIO INTERFACE CONTROL registers (Page 0, addresses 0x0C–0x0E), where bit fields select format, word length (16/20/24/32-bit), and master/slave mode. Timing diagrams for each mode (Figures 2–5) confirm strict setup/hold and delay specifications across IOVDD ranges from 1.1 V to 3.3 V.

How does the programmable microphone bias voltage function on the TLV320AIC32IRHBTG4, and what are its valid settings?

The TLV320AIC32IRHBTG4 provides a programmable MICBIAS output (Pin 15) with four factory-trimmed voltage options: 2.0 V, 2.25 V, 2.5 V, and 2.75 V - selectable via register bits in the MIC BIAS CONTROL register (Page 0, address 0x08). These settings accommodate a wide range of electret condenser microphones with differing current and voltage requirements, and the bias circuit is rated for up to 4 mA sourcing capability at the 2.5-V setting.

Can the TLV320AIC32IRHBTG4 operate with mismatched analog and digital supply voltages, and what are the absolute limits?

Yes, the TLV320AIC32IRHBTG4 is designed for independent supply domains: AVDD/DRVDD (2.7–3.6 V), DVDD (1.65–1.95 V), and IOVDD (1.1–3.6 V). Absolute maximum ratings permit AVDD–DRVDD differential up to ±0.1 V, and IOVDD–DVSS up to –0.3 V to +3.9 V. Operation outside recommended ranges risks latch-up or permanent damage; for example, DVDD must never exceed 2.5 V relative to DVSS, and AVDD must remain within 2.7–3.6 V for guaranteed ADC/DAC performance.