4.10 Dac/Line Outputs Tab - Texas Instruments TLV320AIC3109EVM-K User Manual

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TLV320AIC3109EVM Software

The Configuration control may be set as either Fully-Differential or Pseudo-Differential. This control is

used to determine if the output stage is being used to drive a fully differential output load or a output load

where one of the outputs if referenced to a common-mode voltage (pseudo-differential).

The output Coupling control can be chosen as either Capless or AC-coupled. This setting should

correspond to the setting of the hardware switch (SW1) on the TLV320AIC3109EVM (CAPLESS or CAP).

The common mode voltage of the outputs may be set to 1.35 V, 1.5 V, 1.65 V, or 1.8 V using the

Common Mode Voltage control.

The TLV320AIC3109-Q1 offers several options to help reduce the turnon and turnoff pop of the output

amplifiers. The Power-On Delay of the output drivers can be set using the corresponding control from 0's

up to 4 seconds. Ramp-Up Step Timing can also be adjusted from 0ms to 4ms. The outputs can be set

to soft-step their volume changes, using the Output Volume Soft Stepping control, and set to step once

per Fs period, once per two Fs periods, or soft-stepping can be disabled altogether.

The high-power outputs of the TLV320AIC3109-Q1 can be configured to go to a weak common-mode

voltage when powered down. The source of this weak common-mode voltage can be set on this tab with

the Weak Output CM Voltage Source drop-down. Choices for the source are either a resistor divider off

the AVDD_DAC supply, or a bandgap reference. Refer to

96-kHz, Mono Audio Codec

Headset detection features are enabled using the Enable button in the Headset Detection group box.

When enabled, the indicators in the HS/Button Detect group box will light when either a button press or

headset is detected. When a headset is detected, the type of headset is displayed in the Detection Type

indicator. Debounce times for detection are set using the Jack Detect Debounce and Button Press

Debounce controls, which offer debounce times in different numbers of milliseconds. Refer to

TLV320AIC3109-Q1 Automotive, Low-Power, 96-kHz, Mono Audio Codec

headset detection.

Output short-circuit protection can be enabled in the Short Circuit Protection group box. Short Circuit

Protection can use a current-limit mode, where the drivers will limit current output if a short-circuit

condition is detected, or in a mode where the drivers will power down when such a condition exists.

The I

C Bus Error Detection button allows the user to enable circuitry which will set a register bit

(Register 107, D0) if an I