TS4994 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
TS4994
STMicroelectronics
'TS4994' PDF : 31 Pages View PDF
TS4994
Application Information
4.10 Pop performance
In theory, due to a fully differential structure, the pop performance of the TS4994 should be perfect.
However, due to Rin, Rfeed, and Cin mismatching, some noise could remain at startup. In TS4994 we
included a pop reduction circuitry reach the pop that is theoretical with mismatched components. With this
circuitry, the TS4994 is close to zero pop for all common applications possible.
In addition, when the TS4994 is set in standby, due to the high impedance output stage configuration in
this mode, no pop is possible.
4.11 Single ended input configuration
It’s possible to use the TS4994 in a single-ended input configuration. However, input coupling capacitors
areneeded in this configuration. The schematic in Figure 79 shows this configuration using the miniSO8
version of the TS4994 as example.
Figure 79. Single ended input typical application
Ve
Cin1 Rin1
220nF 20k
Cin2 Rin2
GND 220nF 20k
Optional
Cb
1u
GND
Rfeed1
20k
2 Vin-
3 Vin+
4 Bypass
Stdby
1
VCC
Cs
1u
7
GND
VCC
-
+
Bias
Standby
GND
6
GND
Rfeed2
20k
Vo+ 8
Vo-
5
TS4994IS
8 Ohms
GND VCC
The components calculations remain the same except for the gain. The new formula is:
Av SE
=
VO+ − VO−
Ve
=
Rfeed
Rin
26/31
Share Link: 