Application information

TS2012FC

24/31

Figure 38.

Shutdown phase

4.7

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 at 0 V.

With a 0.4 V shutdown voltage pin for example, you must add 0.4 V/300 k

Ω=1.3 µA in typical

(0.4 V/240 k

Ω=1.66 µA in maximum) for each shutdown pin to the standby current specified

in Table 5 to Table 7. Of course, this current will be provided by the external control device

for standby pins.

4.8

Single-ended input configuration

It is possible to use the TS2012 in a single-ended input configuration. However, input

coupling capacitors are mandatory in this configuration. The schematic diagram in Figure 39

shows a typical single-ended input application.

Preset gain

t

STBY

STBY

Time

Time

Gain

STBY

Level

Gain decreasing

LO

HI

G = 6dB

G = 12dB

G = 18dB

G = 24dB

Mute

STBY

Mute