The TLV320AIC3104 is a low-power stereo audio codec with stereo headphone amplifier, as
well as multiple inputs and outputs that are programmable in single-ended or fully differential
configurations. The device includes extensive register-based power control is included, thus
enabling stereo 48-kHz DAC playback as low as 14 mW from a 3.3-V analog supply, making the device
ideal for portable battery-powered audio and telephony applications.
The record path of the TLV320AIC3104 contains integrated microphone bias, digitally
controlled stereo microphone preamplifier, and automatic gain control (AGC), with mix/mux
capability among the multiple analog inputs. During record, programmable filters 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
The TLV320AIC3104 contains four high-power output drivers as well as two fully
differential output drivers. The high-power output drivers can drive 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 capacitor-free 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 sample 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 TLV320AIC3104 provides an extremely high range of
programmability for both attack (8–1,408 ms) and for decay (0.05–22.4 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, whereas the
serial audio data bus is programmable for I2S, left- and 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
The TLV320AIC3104 operates from an analog supply of 2.7 V to 3.6 V, a digital core supply
of 1.525 V to 1.95 V, and a digital I/O supply of 1.1 V to 3.6 V. The device is available in a 5-mm
× 5-mm 32-pin QFN package.