MAX98089EVKIT+WLP Maxim Integrated, MAX98089EVKIT+WLP Datasheet - Page 112

• Manufacturer Part Number: MAX98089EVKIT+WLP
• Description: Audio IC Development Tools
• Manufacturer: Maxim Integrated
• Type: Audio CODECr

Specifications of MAX98089EVKIT+WLP

• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX98089
• Operating Supply Voltage: 2.8 V to 5.5 V
• Interface Type: I2C
• Operating Supply Current: 1 A

The IC’s includes two output bypass switches that solve
common applications problems. When a single trans-
ducer is used for the loudspeaker and receiver, the need
exists for two amplifiers to power the same transducer.
Bypass switches connect the IC’s receiver amplifier
output to the speaker amplifier’s output, allowing either
amplifier to power the same transducer. In systems where
Figure 32. Output Bypass Switch Block Diagrams
Table 29. Output Bypass Switches Register
Maxim Integrated
REGISTER
*OPTIONAL 10I RESISTORS IMPROVE DISTORTION
THROUGH THE ANALOG SWITCH.
0x4A
0dB
RECLEN
0dB
RECREN
SPLEN
+6dB
POWER/DISTORTION
SPEAKER AMPLIFIER BYPASS USING AN
LIMITER
SPKBYP
RECBYP
EXTERNAL RECEIVER AMPLIFIER
BIT
7
4
1
0
RECN/RXINN
RECP/RXINP
SPKLVDD
SPKLGND
SPKLN
SPKLP
MIC2BYP
Output Bypass Switches
RECBYP
SPKBYP
INABYP
NAME
10I*
10I*
EXTERNAL
RECEIVER
AMP
See the Microphone Inputs section.
RXINP to RXINN Bypass Switch
Shorts RXINP to RXINN allowing a signal to pass through the ICs. Disable the receiver
amplifier when RECBYP = 1.
0 = Disabled
1 = Enabled
RXIN to SPKL Bypass Switch
Shorts RXINP/RXINN to SPKLP/SPKLN allowing either the internal or an external
receiver amplifier to power the left speaker. Disable the left speaker amplifier when
SPKBYP = 1.
0 = Disabled
1 = Enabled
Low-Power, Stereo Audio Codec
0dB
RECLEN
0dB
RECREN
SPLEN
+6dB
POWER/DISTORTION
SPEAKER AMPLIFIER BYPASS USING THE
LIMITER
INTERNAL RECEIVER AMPLIFIER
SPKBYP
with FlexSound Technology
RECBYP
RECN/RXINN
RECP/RXINP
an external receiver amplifier is used, route its output to
the left speaker through RECP/RXINP and RECN/RXINN,
bypassing the Class D amplifier. In systems where an
external amplifier drives both the receiver and the IC’s
line input, one of the differential signals can be discon-
nected from the receiver when not needed by passing it
through the analog switch that connects RECP/RXINP to
RECN/RXINN.
SPKLGND
SPKLVDD
SPKLN
SPKLP
DESCRIPTION
0dB
RECLEN
0dB
RECREN
SPLEN
+6dB
POWER/DISTORTION
CONTROLLING AN EXTERNAL RECEIVE
LIMITER
SPKBYP
RECBYP
AMPLIFIER AND SPEAKER
MAX98089
RECN/RXINN
RECP/RXINP
SPKLGND
SPKLVDD
SPKLN
SPKLP
EXTERNAL
RECEIVER
AMP
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