max9890 Maxim Integrated Products, Inc., max9890 Datasheet - Page 7

• Manufacturer Part Number: max9890
• Description: Max9890 Audio Click-pop Suppressor
• Manufacturer: Maxim Integrated Products, Inc.

The MAX9890’s internal switches connect the input to the
output after the coupling capacitors are fully charged.
The MAX9890A holds the switches open for 200ms and is
ideal for coupling capacitors less than 100µF. The
MAX9890B has a longer turn-on time of 330ms and is
Figure 1. Startup/Power-Up Sequence Without Click-Pop
Suppression
Figure 3. Shutdown/Power-Down Sequence Without Click-Pop
Suppression
0dB
0dB
_______________________________________________________________________________________
FFT: 25Hz/div
FFT: 25Hz/div
40ms/div
100ms/div
V
2V/div
V
1V/div
V
100mV/div
FFT
20dB/div
V
2V/div
V
1V/div
V
500mV/div
FFT
20dB/div
CC
OUT
HEADPHONE
CC
OUT
HEADPHONE
HEADPHONE
/SHDN
HEADPHONE
/SHDN
Switches
Audio Click-Pop Suppressor
ideal with larger coupling capacitors less than 220µF. The
internal switches have a low on-resistance (R
and on-resistance flatness (R
total harmonic distortion plus noise (THD+N). The rela-
tionship below shows the contribution to THD+N through
the switch, due to on-resistance and on-resistance flat-
Figure 2. Startup/Power-Up Sequence With Click-Pop
Suppression
Figure 4. Shutdown/Power-Down Sequence With Click-Pop
Suppression
0dB
0dB
FFT: 25Hz/div
FFT: 25Hz/div
100ms/div
40ms/div
FLAT(ON)
= 2mΩ) minimizing
V
2V/div
V
1V/div
V
20mV/div
FFT
20dB/div
V
1V/div
V
2V/div
V
50mV/div
FFT
20dB/div
HEADPHONE
CC
OUT
CC
OUT
HEADPHONE
HEADPHONE
HEADPHONE
/SHDN
/SHDN
ON
= 0.5Ω)
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