TAS2120 datasheet(18/63 Pages) TI

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switching, power down analog and digital blocks to ensure no power down pop and finally put the device into

Hardware Shutdown mode. I2C communication is disabled while the SDZ pin is asserted low in this mode.

If configured in SDZ_MODE[1:0] = 01, when the SDZ pin is asserted low the device will immediately enter the

hardware shutdown and will not go through any power-down sequencing routine. It is recommended to ensure

that the audio input signal is ramped down to the idle channel before asserting the SDZ pin low in this mode

(device software mute mode can be used to realize this). I2C communication is disabled while the SDZ pin is

asserted low in this mode.

Finally, the device can be configured to Software shutdown mode by setting SDZ_MODE[1:0] = 10. In this

mode, when the SDZ pin is pulled low, the device will follow normal power-down sequencing and enter software

shutdown mode. All the device register configuration programmed is retained as is from the state the device was

in before the SDZ pin was pulled low. I2C communication is still available while the SDZ pin is asserted low in

this mode.

Table 6-1. Shutdown Control

SDZ_MODE[1:0]

Configuration

00 (default)

Hardware shutdown mode with

power-down sequencing

Hardware shutdown mode -

immediate

Software shutdown mode (All

Reserved

When SDZ_MODE[1:0] is 00 or 10, the device goes through shutdown sequencing and the SDZ pin must be

held low for the entire duration of the shutdown time. The shutdown time is specified in the Power up/down Time

section of the Electrical Characteristics section. When SDZ is released, the device will sample the AD1 and AD2

pins and enter the software shutdown mode.

6.3.1.2 Hardware Config Modes

The device can operate in a pre-configured HW Mode depending on the terminations used for Select pin1 to

Select Pin5. HW Mode behavior of the device is designed to simplify device configuration without using any

software based configurations through I2C communication.

Table 6-2. SEL1 HW Mode configuration

SEL1 Connection

Configuration

Direct Short to GND

I2C Mode selection

1.2k to GND

6dBV Amp Gain, Volume ramp

disabled

1.2k to Supply

12dBV Amp Gain, Volume ramp

disabled

5k to GND

18dBV Amp Gain, Volume ramp

disabled

330 to Supply

21dBV Amp Gain, Volume ramp

disabled

4.7k to Supply

6dBV Amp Gain, Volume ramp

enabled

24k to GND

12dBV Amp Gain, Volume ramp

enabled

24k to Supply

18dBV Amp Gain, Volume ramp

enabled

Direct Short to Supply

21dBV Amp Gain, Volume ramp

enabled

TAS2120

SLASFC6 – AUGUST 2024

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