MAX98088EWY+T Maxim Integrated Products, MAX98088EWY+T Datasheet - Page 65
MAX98088EWY+T
Manufacturer Part Number
MAX98088EWY+T
Description
Audio CODECs DUAL I2S CODEC AUDIO STEREO
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX98088EWYT.pdf
(123 pages)
Specifications of MAX98088EWY+T
Number Of Adc Inputs
2
Number Of Dac Outputs
2
Resolution
24 bit
Operating Supply Voltage
1.8 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
WLP-63
Number Of Channels
2
Supply Current
4.5 mA
Thd Plus Noise
- 77 dB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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The device includes three differential microphone inputs
and a low-noise microphone bias for powering the micro-
phones (Figure 6). One microphone input can also be con-
figured as a digital microphone input accepting signals
from up to two digital microphones. Two microphones,
analog or digital, can be recorded simultaneously.
In the typical application, one microphone input is used
for the handset microphone and the other is used as an
accessory microphone. In systems using a background
noise microphone, INA can be retasked as another
microphone input.
In systems where the codec is not the only device
recording microphone signals, connect microphones to
Figure 6. Microphone Input Block Diagram
INA2/EXTMICN
INA1/EXTMICP
DIGMICDATA
DIGMICCLK
MICBIAS
MIC1P/
MIC1N/
MIC2N
MIC2P
MIC2BYP
MBEN
INABYP
REG
Microphone Inputs
MCLK
CONTROL
CLOCK
EXTMIC
EXTMIC
with FlexSound Technology
PA1EN:
0/20/30dB
PA2EN:
0/20/30dB
PGAINA:
+20dB TO -6dB
PGAINA:
+20dB TO -6dB
PGAM1:
+20dB TO 0dB
PGAM1:
+20dB TO 0dB
MIC2P/MIC2N and EXTMICP/EXTMICN. MIC1P/MIC1N
then become outputs that route the microphone signals
to an external device as needed. Two devices can then
record microphone signals without needing external
analog switches.
Analog microphone signals are amplified by two stages
of gain and then routed to the ADCs. The first stage offers
selectable 0dB, 20dB, or 30dB settings. The second
stage is a programmable-gain amplifier (PGA) adjustable
from 0dB to 20dB in 1dB steps. To maximize the signal-
to-noise ratio, use the gain in the first stage whenever
possible. Zero-crossing detection is included on the PGA
to minimize zipper noise while making gain changes.
INADIFF
Stereo Audio Codec
MIXADL
MIXADR
MIX
MIX
ADLEN
ADREN
ADCR
ADCL
65
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