Texas Instruments TLV320AIC1103ZQER

Overview

TLV320AIC1103ZQER from Texas Instruments is a single-chip PCM audio codec IC designed for voice-band communications in wireless handsets and telephony systems. It integrates two differential microphone inputs, one differential earphone output (EAR1), one single-ended earphone output (EAR2), programmable gain amplifiers for transmit/receive/sidetone/volume control, I²C interface, DTMF/single-tone generation, and PDM buzzer output - all operating at 2.7 V.

For engineers reviewing the TLV320AIC1103ZQER datasheet, TLV320AIC1103ZQER pinout, TLV320AIC1103ZQER application, or TLV320AIC1103ZQER equivalent, key selection considerations include its dual-mic support with 23.5 dB/12 dB selectable gain, 15-bit linear or 8-bit µ/A-law companded PCM interface, differential earphone amplifier with click/pop suppression, and integrated PLL clock synthesis from 2.048 MHz MCLK.

Technical Context

The TLV320AIC1103ZQER implements a sigma-delta analog-to-digital converter (ADC) with third-order modulator architecture for microphone input, and a second-order digital-to-analog converter (DAC) for earphone output. Its digital filtering meets CCITT G.714 requirements for both transmit and receive paths, with configurable high-pass filter and slope filter selection via I²C.

Internal clock generation uses a phase-locked loop (PLL) locked to a 2.048 MHz master clock to produce the required 10.24 MHz internal clock. The device supports two power-up modes: default mode (PWRUPSEL = VDD) enabling operation without microcontroller or I²C, and controlled mode (PWRUPSEL = GND) requiring I²C initialization.

Key Specifications

Pinout & Package

TLV320AIC1103ZQER is packaged in a 32-pin Thin Quad Flatpack (TQFP), PBS package, with exposed thermal pad (not electrically connected). Pin numbering follows standard counter-clockwise orientation from top-left corner (Pin 1 = MBIAS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV320AIC1103ZQER, TLV320AIC101IRHBT reduces feature count and package size for simpler voice endpoints, while TLV320AIC23BIPW upgrades resolution and interface flexibility at the cost of missing handset-specific functions like sidetone and PWRUPSEL.

Availability

TLV320AIC1103ZQER is available at Aetrix Electronics and suitable for digital handset, cordless phone, and digital voice recording applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV320AIC1103ZQER 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 audio signal chain solutions.

The TLV320AIC1103ZQER belongs to TI's legacy voice-band PCM codec product line, engineered specifically for low-voltage, low-power telephony endpoints including wireless handsets, headsets, and PABX terminals.

FAQ

What is the primary function of the TLV320AIC1103ZQER in a voice communication system?

The TLV320AIC1103ZQER serves as a complete PCM audio codec IC, performing analog-to-digital conversion for microphone inputs and digital-to-analog conversion for earphone outputs. It integrates microphone preamplifiers, programmable gain stages, sidetone mixing, DTMF generation, and I²C-based configuration - enabling full-duplex voice processing in compact telephony devices. TLV320AIC1103ZQER operates at 2.7 V and supports both 15-bit linear and 8-bit µ/A-law companded data formats.

Does the TLV320AIC1103ZQER support differential earphone output with click/pop suppression?

Yes, the TLV320AIC1103ZQER provides a dedicated differential earphone amplifier (EAR1OP/EAR1ON) with built-in click and pop suppression circuitry. This feature eliminates audible transients during power-up, power-down, and mute/unmute events - critical for user comfort in handsets and headsets. TLV320AIC1103ZQER does not apply this suppression to the single-ended EAR2O output.

How does the PWRUPSEL pin affect system design for the TLV320AIC1103ZQER?

The PWRUPSEL pin (Pin 20) determines whether TLV320AIC1103ZQER powers up in default mode (PWRUPSEL = VDD) or controlled mode (PWRUPSEL = GND). In default mode, all functions operate with factory-set parameters - no microcontroller or I²C interface is needed. In controlled mode, I²C initialization is mandatory to configure registers. This dual-mode capability simplifies prototyping and enables flexible firmware integration in production designs.

Can the TLV320AIC1103ZQER generate DTMF tones without external components?

Yes, TLV320AIC1103ZQER includes an integrated DTMF generator that produces standard dual-tone signals using internal digital synthesis. Tone selection is configured via I²C registers (high-tone and low-tone registers), and output can be routed either to the receive DAC (for earphone playback) or to the BUZZCON pin (as a PDM signal for external buzzer drivers). No external tone-generation IC or passive components are required.

What are the power supply requirements and domain separation for the TLV320AIC1103ZQER?

TLV320AIC1103ZQER requires three independent supply domains: AVDD/AVSS for analog circuits (mic amps, DAC), DVDD/DVSS for digital logic (I²C, PCM interface), and PLLVDD/PLLVSS for the phase-locked loop. Each domain accepts 2.7–3.3 V. This separation minimizes noise coupling - especially between digital switching and sensitive analog paths - improving SNR by over 10 dB compared to single-supply codecs. TLV320AIC1103ZQER also includes dedicated EARVDD/EARVSS supplies for earphone amplifiers.