MAX9888EWY+T Maxim Integrated Products, MAX9888EWY+T Datasheet - Page 98
MAX9888EWY+T
Manufacturer Part Number
MAX9888EWY+T
Description
IC CODEC AUDIO FLEXSOUND 63WLP
Manufacturer
Maxim Integrated Products
Series
DirectDrive®, FLEXSOUND™r
Type
Class Dr
Datasheet
1.MAX9888EWYT.pdf
(115 pages)
Specifications of MAX9888EWY+T
Output Type
3-Channel with Stereo Headphones
Max Output Power X Channels @ Load
1.37W x 2 @ 8 Ohm; 40mW x 2 @ 16 Ohm
Voltage - Supply
2.8 V ~ 5.5 V
Features
Depop, Differential Inputs, I²S, Microphone, Mute, Shutdown
Mounting Type
Surface Mount
Package / Case
63-WLP
For Use With
MAX9888EVKIT+ - KIT EVALUATION FOR MAX9888
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Table 30. Output Bypass Switches Register
Stereo Audio CODEC
with FLEXSOUND Technology
Figure 31. Output Bypass Switch Block Diagrams
98
The IC 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
*OPTIONAL 10I RESISTORS IMPROVE DISTORTION
THROUGH THE ANALOG SWITCH.
REGISTER
0x48
RECEN
SPLEN
0dB
+6dB
POWER/DISTORTION
SPEAKER AMPLIFIER BYPASS USING AN
RECBYP
LIMITER
SPKBYP
EXTERNAL RECEIVER AMPLIFIER
BIT
7
4
1
0
RECN/RXINN
RECP/RXINP
SPKLGND
SPKLVDD
SPKLP
SPKLN
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 MAX9888. 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
SPEAKER AMPLIFIER BYPASS USING THE
RECEN
SPLEN
0dB
+6dB
POWER/DISTORTION
INTERNAL RECEIVER AMPLIFIER
LIMITER
RECBYP
SPKBYP
RECN/RXINN
RECP/RXINP
SPKLGND
SPKLVDD
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.
SPKLN
SPKLP
DESCRIPTION
RECEN
SPLEN
0dB
+6dB
POWER/DISTORTION
LIMITER
RECBYP
CONTROLLING AN EXTERNAL RECEIVE
SPKBYP
AMPLIFIER AND SPEAKER
RECN/RXINN
RECN/RXINN
SPKLGND
SPKLVDD
SPKLN
SPKLP
RECEIVER AMP
EXTERNAL
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