TLV320AIC1109PBS

Codecs Overview

The TLV320AIC1109PBS is a mono PCM audio CODEC designed for voice-band communications. It operates on a single 2.7-V to 3.3-V supply and features two differential microphone inputs, one differential earphone output (EAR1), and one single-ended earphone output (EAR2). The device supports 15-bit linear data or 8-bit companded modes (µ-law/A-law) via an I2C interface. It includes programmable gain amplifiers for transmit, receive, and sidetone paths, alongside DTMF generation and PDM buzzer control. Packaged in a 32-terminal TQFP, it functions within a -40°C to +85°C temperature range.

Codecs Feature Summary

• Dual differential microphone inputs with switchable low-noise amplifier stages
• Integrated DTMF tone generator supporting pulse density modulation outputs
• Configurable power-up mode allowing operation without microcontroller initialization
• Internal phase-locked loop generating required clocks from a master input

Codecs Applications

• Digital wireless handsets
• Digital headsets
• Cordless phones
• Digital PABX systems
• Digital voice recording devices

Codecs Procurement Notes

Verify the specific PBS suffix indicates the TQFP-32 package variant when sourcing. Confirm that the component meets industrial temperature specifications (-40°C to +85°C) required for your deployment environment. Ensure the design accommodates the separate analog and digital power domains to maintain signal integrity. Validate that the I2C pull-up resistor values align with the specified bus capacitance limits.

Codecs Selection Notes

Select this component for applications requiring integrated DTMF generation and dual earphone outputs. Consider the internal PLL if external clocking resources are limited. Evaluate the power consumption requirements against the typical operating current of approximately 8 mA. Verify that the host system can support the necessary I2C register configuration for gain and mode selection.

Codecs Part Context

This part belongs to Texas Instruments' legacy PCM CODEC family, specifically engineered for telecommunications interfaces. It serves as a bridge between analog audio signals and digital PCM buses. The device integrates filtering and modulation circuits to meet CCITT G.714 standards. It is distinct from higher-fidelity stereo codecs by focusing on optimized voice-band performance and cost-effective integration.

Codecs Replacement Considerations

Check for direct pin-compatible upgrades within the same series. Verify that any substitute maintains the 32-pin TQFP form factor and identical voltage ranges.