1FEATURES

2• Single Channel Codec

• Noise Shaped Delta Sigma ADC and DAC

Technology

• Low Supply Voltage and Current:

– 1.3-V Typical Power Supply

– 350-μA Typical Supply Current Drain

• Power Supply Up Monitor and Low Battery

Monitor That Also Automatically Shuts Off H-

Bridge Output When Battery Decays Below

1.05 V in a Nontransient Manner

• Typical 2.4-μVrms Input Referred Noise With

0.01% Total Harmonic Distortion for Front End

and 108-dB Dynamic Range

• ADC Has 87-dB Dynamic Range With 73-dB

Total Harmonic Distortion 100 Hz-10 kHz, 40-

kHz Sampling Rate

• Typical 55-dB PSRR 100 Hz to 10 kHz for

Analog Front End

• Low Noise Programmable Gain

Amplifier/Compressor Front End With

Programmable Fast and Slow Attack and

Decay Rates With Dual or Single Attack and

Decay Rate Option

• Typical Output Noise of 12 μVrms With 0.05%

Total Harmonic Distortion for Delta Sigma DAC

and H-Bridge Output Driver

• Low Jitter Oscillator That Generates all

Internal Clocks and Generates 5-MHz Output

DSP/μC Clock

• Regulated Bandgap Voltage Reference

• Programmable Functionality via Digital Serial

Interface

– McBSP Interface, DSP Protocol

– TI TMS320VC54x™, TMS320VC55x™ DSPs

– SPI Interface, Microcontroller Protocol

– TI MSP430xx

• External Chip Power Down and Reset

• Available in:

– - 32-Pin QFN 5×5-mm Plastic Package

– - 32-Pad Bumped Die in Waffle Pack (wafer

scale packaging)

APPLICATIONS

• Hearing Instruments

• Personal Medical Devices

• Hearing Protection

• Aural Processing

• Low-Power Headsets

DESCRIPTION

The AIC111 IC design specification serves to provide

product development teams with a guideline for how

the AIC111 IC is specified and programmable options that are available. The document outlines a top-level

block description of the IC along with system

specifications and functions. Individual block

descriptions and target specifications are also

outlined.

The Texas Instruments AIC111 is a TI μPower DSP

compatible, or microcontroller compatible audio

codec product, or analog interface circuit. The

AIC111 is part of a comprehensive family of DSP/μC

based high-performance analog interface solutions.

The AIC111 is targeted primarily at personal medical devices, such as hearing instruments, aural

preprocessing applications, and low-power headset

applications. The AIC111 is used in any design

requiring a programmable time constant

PGA/compressor interface, high dynamic range

analog-to-digital converter, an external DSP/μC

handling signal processing, or a low distortion digital- to-analog converter with a balanced H-Bridge

speaker driver. It supports a CMOS digital interface

tailored for TI DSPs with the McBSP protocol such as

TMS320VC54x™ DSP family and SPI-based

controllers such as TI MSP430x family of microcontrollers. The AIC111 also has an external

microphone or sensor supply and bias and power

supply up low-battery monitor indicator.