Texas Instruments TLV320AIC33IZQE

Overview

TLV320AIC33IZQE from Texas Instruments is a low-power stereo audio codec with integrated 100-dBA DAC, 92-dBA ADC, programmable microphone bias, AGC, and stereo headphone/speaker drivers-designed for battery-powered portable audio and telephony systems operating from 2.7–3.6 V analog supply and supporting 8–96 kHz sampling rates.

For engineers reviewing the TLV320AIC33IZQE datasheet, TLV320AIC33IZQE pinout, TLV320AIC33IZQE application, or TLV320AIC33IZQE equivalent, this page delivers verified electrical specs, QFN-48 terminal mapping, real-world audio path configurations, and validated alternative codecs for portable handset, headset, and multimedia processor integration.

Technical Context

The TLV320AIC33IZQE implements delta-sigma stereo DAC and ADC paths with independent programmable gain amplifiers (±0.5 dB steps, up to +59.5 dB), digital filtering for 3D/bass/treble/EQ/de-emphasis, and a fully configurable PLL supporting standard audio clocks (12/13/16/19.2/19.68 MHz MCLK) across 512 kHz–50 MHz input range.

Its analog signal chain includes ten input pins (MIC/LINE configurable single-ended or differential), seven output drivers (four high-power BTL-capable for 8-Ω speakers at 500 mW/channel, three fully differential line outputs), and modular power control enabling 14-mW stereo 48-kHz playback on 3.3-V analog supply.

Key Specifications

Pinout & Package

TLV320AIC33IZQE is packaged in a 7 × 7 mm, 48-lead QFN (ZQE) with exposed thermal pad connected to DRVSS. Pin numbering follows bottom-view layout; all pins are electrically defined per TI SLAS480B datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV320AIC33IZQE, TLV320AIC3204IRGZR offers lower system power but sacrifices speaker drive and input flexibility, while PCM3168APFPR delivers superior audio fidelity at the cost of size and power - making TLV320AIC33IZQE the optimal balance for mainstream portable telephony and media devices.

Availability

TLV320AIC33IZQE is available at Aetrix Electronics and suitable for smartphone voice call subsystems, wireless headset baseband interfaces, portable media player line-output stages, and industrial handheld recorders requiring stable component supply across extended production lifecycles.

Supply support for TLV320AIC33IZQE 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 solutions, with decades of expertise in precision audio signal chains and low-power design.

The TLV320AIC33IZQE belongs to TI's portable audio codec product line, engineered specifically for space-constrained, battery-operated devices demanding high-fidelity voice and music playback with minimal power consumption and integrated system-level features.

FAQ

What is the primary function of the TLV320AIC33IZQE in a portable system?

The TLV320AIC33IZQE serves as a complete stereo audio codec, integrating high-performance ADC and DAC paths, programmable microphone preamplifiers with AGC, stereo headphone and speaker drivers, digital audio effects, and flexible clock generation. In portable systems like smartphones or headsets, it handles bidirectional audio conversion, analog front-end conditioning, and output amplification - reducing bill-of-materials and PCB area versus discrete solutions. Its 14-mW 48-kHz playback and 92/100-dBA ADC/DAC SNR make it ideal for battery-sensitive voice and media applications.

Does the TLV320AIC33IZQE support capless headphone output?

Yes, the TLV320AIC33IZQE supports capless (capacitor-less) headphone output using its high-power output drivers (HPLOUT/HPLCOM and HPROUT/HPRCOM). When configured for capless operation, it drives 16-Ω stereo headphones directly without DC-blocking capacitors, preserving low-frequency response and saving board space. This mode requires proper common-mode voltage selection (1.35–1.8 V) and is validated for THD < 0.028% at 20 mW into 16 Ω per channel, as specified in the TI SLAS480B datasheet.

How does the TLV320AIC33IZQE handle microphone biasing?

The TLV320AIC33IZQE provides an integrated, programmable microphone bias voltage via the MICBIAS pin (Pin 13), with settings of 2.0 V, 2.25 V, 2.5 V, or 2.75 V - selectable through register configuration. It sources up to 4 mA at 2.5 V into a 750-Ω load, eliminating the need for external bias circuitry. The bias voltage tracks AVDD over temperature and supply variation, ensuring stable electret microphone operation across –40°C to +85°C. This feature is confirmed in the Electrical Characteristics table (page 6) and Typical Characteristics (Figures 12–13) of the official datasheet.

Can the TLV320AIC33IZQE drive 8-Ω speakers directly?

Yes, the TLV320AIC33IZQE can drive 8-Ω speakers directly using its four high-power output drivers in bridge-tied-load (BTL) configuration. Each stereo pair (left/right) delivers 500 mW per channel into 8 Ω with THD < 0.022% at 10 mW, as measured in the Typical Characteristics (Figure 9). This capability is enabled by internal charge-pump circuitry and thermal management designed for the 7 × 7 mm QFN package (θJA = 38.5 °C/W), allowing compact handhelds to omit external Class-D amplifiers while maintaining audio quality and thermal safety.

What clock sources does the TLV320AIC33IZQE PLL accept?

The TLV320AIC33IZQE PLL accepts master clock (MCLK) inputs from 512 kHz to 50 MHz, supporting common system clocks including 12 MHz, 13 MHz, 16 MHz, 19.2 MHz, and 19.68 MHz. It generates precise audio sample rates (8–96 kHz) with low jitter, enabling synchronization across I²S, TDM, or DSP audio interfaces. The PLL's flexibility is documented in the "Programmable PLL for Flexible Clock Generation" feature list and verified in the Clock Generation section (page 18) of the SLAS480B datasheet - critical for interoperability with diverse host processors and Bluetooth modems.