MAX98090AETL+ Maxim Integrated, MAX98090AETL+ Datasheet - Page 121

• Manufacturer Part Number: MAX98090AETL+
• Description: Interface - CODECs 5V 130mW Stereo Headphone Amp
• Manufacturer: Maxim Integrated

Specifications of MAX98090AETL+

• Rohs: yes

MAX98090
The DRC features two programmable signal thresholds.
The high amplitude compression threshold is used to
ensure maximum signal amplitude without audible clip-
ping. The compression ratio can be set to one of five
options from a 1:1 ratio to an infinite:1 ratio (or flat output
amplitude as input amplitude increases). The compres-
sion threshold can be configured from -31dB to 0dB. The
compression ratios and a range of thresholds are illus-
trated in Figure 28.
Figure 28. DRC Compression Ratio and Threshold
Figure 29. DRC Expansion Ratio and Threshold
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-10
-20
-30
-40
-50
-60
-30
-40
-50
-60
-70
-80
-90
0
FULL SCALE
-60
THRESHOLD = -30dB
THRESHOLD = -60dB
-90
COMPRESSION
RATIO =4:1
RATIO = 1:2
EXPANDER
-50
-80
INPUT AMPLITUDE (dBFS)
INPUT AMPLITUDE (dBFS)
DRC ENABLED
-40
-70
DRC ENABLED
-30
-60
-50
-20
-40
-10
-30
0
-10
-20
-30
-40
-50
-60
0
-30
-40
-50
-60
-70
-80
-90
FULL SCALE
THRESHOLD = - 30dB
-60
COMPRESSION
THRESHOLD = -60dB
-90
OPTIONS
1:1
RATIO
-50
EXPANSION
INPUT AMPLITUDE (dBFS)
-80
COMPRESSION RATIO
1:2
INPUT AMPLITUDE (dBFS)
EXPANSION RATIO
-40
-70
1:3
-30
RATIO OPTION
-60
The low amplitude expansion threshold is used to prevent
background noise from being amplified. When the signal
level drops below the expansion threshold, the DRC
reduces the gain until the signal increases above the
threshold. The expansion ratio can be set to a 1:1, 1:2, or
1:3 ratio while the threshold can be configured from -35dB
to -66dB. The expansion ratios and a range of threshold
are illustrated in Figure 29.
-20
Ultra-Low Power Stereo Audio Codec
-50
-10
-40
0
-30
1:1
1:5:1
2:1
4:1
INF:1
-10
-20
-30
-40
-50
-60
0
-30
-40
-50
-60
-70
-80
-90
FULL SCALE
-60
COMPRESSION
-90
RATION = 4:1
THRESHOLD
EXPANSION
RATIO = 1:2
OPTIONS
-50
COMPRESSION THRESHOLD
-80
INPUT AMPLITUDE (dBFS)
EXPANSION THRESHOLD
INPUT AMPLITUDE (dBFS)
-40
-65dB
THRESHOLD OPTIONS
-70
-60dB
Maxim Integrated │ 121
-30
-55dB
-60
-50dB
-45dB
-20
-50
-40dB
-35dB
-10
-40
-30
0
0dB
-5dB
-10dB
-15dB
-20dB
-25dB
-30dB