1 Features

1• Stereo Audio ADC

– 92-dBA Signal-to-Noise Ratio

– Supports ADC Sample Rates From 8 kHz to

96 kHz

• Instruction-Programmable Embedded miniDSP

• Flexible Digital Filtering With RAM Programmable

Coefficient, Instructions, and Built-In Processing

Blocks

– Low-Latency IIR Filters for Voice

– Linear Phase FIR Filters for Audio

– Additional Programmable IIR Filters for EQ,

Noise Cancellation or Reduction

– Up to 128 Programmable ADC Digital Filter

Coefficients

• Six Audio Inputs With Configurable Automatic

Gain Control (AGC)

– Programmable in Single-Ended or Fully

Differential Configurations

– Can Be 3-Stated for Easy Interoperability With

Other Audio ICs

• Low Power Consumption and Extensive Modular

Power Control:

– 6-mW Mono Record, 8-kHz

– 11-mW Stereo Record, 8-kHz

– 10-mW Mono Record, 48-kHz

– 17-mW Stereo Record, 48-kHz

• Dual Programmable Microphone Bias

• Programmable PLL for Clock Generation

• I2C Control Bus

• Audio Serial Data Bus Supports I2S, Left/Right-

Justified, DSP, PCM, and TDM Modes

• Digital Microphone Input Support

• Two GPIOs

• Power Supplies:

– Analog: 2.6 V to 3.6 V

– Digital: Core: 1.65 V to 1.95 V,

I/O: 1.1 V–3.6 V

• 4-mm × 4-mm 24-Pin RGE (VQFN)

2 Applications

• Wireless Handsets

• Portable Low-Power Audio Systems

• Noise-Cancellation Systems

• Front-End Voice or Audio Processor for Digital

Audio

3 Description

The TLV320ADC3101 device is a low-power, stereo

audio analog-to-digital converter (ADC) supporting sampling rates from 8 kHz to 96 kHz with an

integrated programmable-gain amplifier providing up

to 40-dB analog gain or AGC. A programmable

miniDSP is provided for custom audio processing.

Front-end input coarse attenuation of 0 dB, –6 dB, or

off, is also provided. The inputs are programmable in a combination of single-ended or fully differential

configurations. Extensive register-based power

control is available via an I2C interface, enabling

mono or stereo recording. Low power consumption

makes the TLV320ADC3101 ideal for batterypowered

portable equipment.