Texas Instruments TLV320AIC33IZQER

Overview

TLV320AIC33IZQER from Texas Instruments is a low-power stereo audio codec with integrated 100-dBA DAC, 92-dBA ADC, 500-mW stereo 8-Ω speaker drivers, programmable microphone bias, and AGC - designed for portable audio/telephony systems requiring simultaneous multi-input recording and headphone/speaker playback under 3.3-V analog supply.

For engineers reviewing the TLV320AIC33IZQER datasheet, TLV320AIC33IZQER pinout, TLV320AIC33IZQER application, or TLV320AIC33IZQER equivalent, key selection criteria include its 48-QFN package, I²C/SPI-selectable control bus, 8–96 kHz sampling rate support, capless headphone output capability, and dual-supply operation (AVDD: 2.7–3.6 V, DVDD: 1.65–1.95 V).

Technical Context

The TLV320AIC33IZQER integrates delta-sigma stereo DAC and ADC paths each supporting 16/20/24/32-bit data at rates from 8 kHz to 96 kHz, with independent programmable digital filtering (3D/bass/treble/EQ/de-emphasis) and configurable analog gain stages (±59.5 dB in 0.5-dB steps). Its signal chain includes ten analog input terminals and seven output drivers - four high-power (BTL-capable) and three fully differential line outputs.

Power management is implemented via register-based modular control, enabling 14-mW stereo 48-kHz DAC playback from a 3.3-V analog supply. Clocking flexibility is provided by an internal PLL supporting standard audio MCLKs (12/13/16/19.2/19.68 MHz) and generating precise audio clocks without external crystal.

Key Specifications

Pinout & Package

The TLV320AIC33IZQER is packaged in a 7 × 7 mm, 48-lead QFN with exposed thermal pad connected to DRVSS. Pin functions are validated per TI SLAS480B datasheet (December 2008 revision), with all 48 pins assigned and no NC pins in this variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV320AIC33IZQER, TLV320AIC3101IRGZR reduces size and power but sacrifices speaker drive and mono output; PCM3168APFPR adds channel count and fidelity at cost of complexity and footprint - TLV320AIC33IZQER balances integration, power, and feature set for mainstream portable audio.

Availability

TLV320AIC33IZQER is available at Aetrix Electronics and suitable for smartphone voice subsystems, portable media players, Bluetooth headset basebands, and industrial handheld terminals requiring stable component supply and long-term production continuity.

Supply support for TLV320AIC33IZQER 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 system solutions.

The TLV320AIC33 product line targets portable consumer electronics, delivering highly integrated, power-optimized audio codecs that reduce bill-of-materials and PCB area while maintaining studio-grade audio performance.

FAQ

What is the maximum output power capability of the TLV320AIC33IZQER into 8-Ω speakers?

The TLV320AIC33IZQER delivers 500 mW per channel into 8-Ω loads using its built-in BTL-configurable high-power output drivers. This specification is verified at 3.3-V analog supply and 48-kHz sampling rate, enabling direct speaker drive without external amplification in compact portable designs. The TLV320AIC33IZQER achieves this while maintaining THD+N below 0.028% at 20 mW output.

Does the TLV320AIC33IZQER support capless headphone output?

Yes, the TLV320AIC33IZQER supports capless (DC-coupled) stereo headphone output with programmable common-mode voltage (1.35 V, 1.50 V, 1.65 V, or 1.80 V) and 0-dB to +9-dB output level control. This eliminates the need for bulky AC-coupling capacitors in space-constrained applications like smartphones and wearables. The TLV320AIC33IZQER maintains 94-dBA SNR and <0.022% THD+N in capless mode with 16-Ω load.

How does the programmable PLL in the TLV320AIC33IZQER simplify system clock design?

The TLV320AIC33IZQER integrates a highly programmable PLL that accepts MCLK inputs from 512 kHz to 50 MHz and generates precise audio clocks for 8–96 kHz sampling rates - including exact 44.1 kHz and 48 kHz - without requiring dedicated crystal oscillators. This allows designers to use low-cost, widely available system clocks (e.g., 12 MHz, 19.2 MHz) while ensuring jitter-free audio timing. The TLV320AIC33IZQER's PLL architecture minimizes phase noise impact on DAC/ADC performance.

Can the TLV320AIC33IZQER interface with both I²C and SPI controllers?

Yes, the TLV320AIC33IZQER supports both I²C and SPI control interfaces, selected by the logic level on the SELECT pin (high = SPI, low = I²C). It implements full I²C functionality including standard/fast modes and supports up to four devices on one bus via address pins MFP0/MFP1. For SPI, it uses standard four-wire protocol with MFP0 as chip select. The TLV320AIC33IZQER does not allow dynamic switching between protocols during operation.

What microphone input configurations does the TLV320AIC33IZQER support?

The TLV320AIC33IZQER supports ten analog input pins configurable as six single-ended or five fully differential microphone/line inputs (MIC1/LINE1, MIC2/LINE2, MIC3/LINE3), each with independent 0–+59.5 dB PGA gain in 0.5-dB steps. It includes integrated microphone bias (programmable 2.0–2.75 V), hardware AGC, and mix/mux capability across inputs. The TLV320AIC33IZQER also provides MICDET pin for headset jack detection and interrupt generation.