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.