The TLV320AIC3105 is a low-power stereo audio codec with multiple single-ended inputs and
a stereo headphone amplifier. The output stages are programmable in single-ended or fully
differential configurations. Extensive register-based power control is included, enabling stereo
48-kHz DAC playback as low as 14 mW from a 3.3-V analog supply, making it ideal for portable
battery-powered audio and telephony applications.
The record path of the TLV320AIC3105 contains integrated microphone bias, digitally
controlled stereo microphone preamplifier, and automatic gain control (AGC), with mix/mux
capability among the multiple analog inputs. Programmable filters are available during record which
can remove audible noise that can occur during optical zooming in digital cameras. The playback
path includes mix/mux capability from the stereo DAC and selected inputs, through programmable
volume controls, to the various outputs.
The TLV320AIC3105 contains four high-power output drivers as well as two fully
differential output drivers. The high-power output drivers are capable of driving a variety of load
configurations, including up to four channels of single-ended 16-Ω headphones using ac-coupling
capacitors, or stereo 16-Ω headphones in a capacitorless output configuration.
The stereo audio DAC supports sampling rates from 8 kHz to 96 kHz and includes
programmable digital filtering in the DAC path for 3D, bass, treble, midrange effects, speaker
equalization, and de-emphasis for 32-kHz, 44.1-kHz, and 48-kHz rates. The stereo audio ADC supports
sampling rates from 8 kHz to 96 kHz and is preceded by programmable gain amplifiers or AGC that can
provide up to 59.5-dB analog gain for low-level microphone inputs. The TLV320AIC3105 provides an
extremely high range of programmability for both attack (81,408 ms) and for decay (0.0522.4
seconds). This extended AGC range allows the AGC to be tuned for many types of applications.
For battery saving applications where neither analog nor digital signal processing are
required, the device can be put in a special analog signal passthrough mode. This mode
significantly reduces power consumption, as most of the device is powered down during this
The serial control bus supports the I2C protocol, while the serial audio data bus is
programmable for I2S, left/right-justified, DSP, or TDM modes. A highly programmable PLL is
included for flexible clock generation and support for all standard audio rates from a wide range
of available MCLKs, varying from 512 kHz to 50 MHz, with special attention paid to the most popular
cases of 12-MHz, 13-MHz, 16-MHz, 19.2-MHz, and 19.68-MHz system clocks.
The TLV320AIC3105 operates from an analog supply of 2.7 V3.6 V, a digital core supply
of 1.525 V1.95 V, and a digital I/O supply of 1.1 V3.6 V. The device is available in a 5-mm ×
5-mm 32-pin QFN package.