ZHCSGM5A August 2017 – November 2017 TLV320AIC3109-Q1
PRODUCTION DATA.
The audio codec in an E-Call system must be able to support full duplex communication between the digital audio source from the wireless module, the microphone input, and the speaker output. The TLV320AIC3109-Q1 is a mono audio codec that meets the low power requirements and has all the features necessary for an E-Call application.
The wireless module communicates to the audio codec through I2S interface. The class-D amplifier must maintain sufficient output power to drive the speaker to the specified audio level with sufficient audio quality. The amplifier must also have high efficiency to optimize power consumption and good EMI, EMC performance. In addition, many E-Call systems require speaker diagnostics and device protection circuitry.
The TLV320AIC3109-Q1 is a low-power mono audio codec that integrates a mono preamplifier and offers multiple inputs and outputs that are programmable in single-ended or fully differential configurations. The TLV320AIC3109-Q1 flexible configuration allows certain internal blocks to be enabled or bypassed. This flexibility allows for optimal power consumption, which is very important for E-Call systems.
The TAS5411-Q1 is a mono digital class-D audio amplifier ideal for use in automotive emergency call, telematics, instrument cluster, and infotainment applications. The device provides up to 8 W into 4 Ω at less than 10% THD+N from a 14.4-Vdc automotive battery. The wide operating voltage range and excellent efficiency make the device ideal for start-stop support or running from a backup battery when required. The integrated load-dump protection reduces external voltage clamp cost and size, and the onboard load diagnostics report the status of the speaker through I2C interface.
Following the recommended component placement (see the schematic layout and routing provided in the Layout section), integrate the TLV320AIC3109-Q1 and supporting components into the system PCB design.
Determining sample rate and master clock frequency is required because all internal timing are derived from the master clock during power-up. See the Audio Clock Generation section for more information on how to configure the required clocks for the device.
When powered up, the device has several features powered down because the audio codec device is designed for low-power applications. Correct routing of the signals internal to the TLV320AIC3109-Q1 is achieved by correctly setting the device registers, powering up the required stages of the device, and configuring the internal switches for desired performance.