DocID14236 Rev 2

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TS2012

Application information

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Another important parameter is the rated voltage of the capacitor. A 1 µF/6.3 V capacitor

used at 5 V, loses about 50 % of its value. With a power supply voltage of 5 V, the

decoupling value, instead of 1 µF, could be reduced to 0.5 µF. As CS has particular influence

on the THD+N in the medium to high frequency region, this capacitor variation becomes

decisive. In addition, less decoupling means higher overshoots which can be problematic if

they reach the power supply AMR value (6 V).

4.6

Wakeup time (twu)

When standby is released to set the device ON, there is typically a delay of 1 ms. The

TS2012 has an internal digital delay that mutes the outputs and releases them after this

delay time to avoid any pop noise.

Note:

The gain increases smoothly (see Figure 44) from the mute to the gain selected by the G1

and G0 pin (Section 4.2).

4.7

Shutdown time

When the standby command is set, the time required to set the output stage to high

impedance and to put the internal circuitry in shutdown mode, is typically 1 ms. This time is

used to decrease the gain and avoid any pop noise during shutdown.

Note:

The gain decreases smoothly until the outputs are muted (see Figure 44).

4.8

Consumption in shutdown mode

Between the shutdown pin and GND there is an internal 300 k

Ω (±20 %) resistor. This

resistor forces the TS2012 to be in shutdown when the shutdown input is left floating.

However, this resistor also introduces additional shutdown power consumption if the

shutdown pin voltage is not 0 V.

For example, with a 0.4 V shutdown voltage pin, the following typical and maximum values

respectively for each shutdown pin must be added to the standby current specified in

Table 5 to Table 7: 0.4 V/300 k

Ω = 1.3 µA and 0.4 V/240 kΩ = 1.66 µA. This current is

provided by the external control device for standby pins.