MAX9853ETM+ Maxim Integrated Products, MAX9853ETM+ Datasheet - Page 47

• Manufacturer Part Number: MAX9853ETM+
• Description: IC CODEC AUDIO STEREO 48TQFN
• Manufacturer: Maxim Integrated Products
• Type: Stereo Audior

Specifications of MAX9853ETM+

• Data Interface: Serial
• Resolution (bits): 18 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 81.5 / 88
• Dynamic Range, Adcs / Dacs (db) Typ: 82 / 87.5
• Voltage - Supply, Analog: 2.6 V ~ 3.3 V
• Voltage - Supply, Digital: 1.7 V ~ 3.3 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFN Exposed Pad
• Conversion Rate: 48 KHz
• Resolution: 18 bit
• Operating Supply Voltage: 1.7 V to 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Snr: 75 dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1 = Digital audio output enabled.
0 = Digital audio output disabled.
S1SDO/S2SDO = 1 configures the MAX9851/MAX9853
to route ADC output data to the respective audio inter-
face output pin. S1SDO/S2SDO = 0 forces
SDOUTS1/SDOUTS2 low.
When both S1SDO and S2SDO are enabled, the S1
and S2 interfaces output the same data. If both outputs
are enabled, the individual interfaces may be config-
ured into different format modes as long as the pro-
grammed sample rates are identical.
1 = Digital audio input enabled.
0 = Digital audio input disabled.
S1SDI/S2SDI = 1 configures the MAX9851/MAX9853 to
perform a soft-start sequence and transfer incoming
audio data from the respective SDIN pin to the digital
filters for that interface. S1SDI/S2SDI = 0 configures the
MAX9851/MAX9853 to begin a soft-stop sequence and
then disregard incoming audio data and disable the
digital input filter path of that interface.
The SLD (register 0x00, B6) flag is set when the soft-
start or soft-stop sequence completes. The S1SDI and
S2SDI bits should be used to cleanly soft-stop signal
data prior to changing the S1MODE or S2MODE bits.
Soft-stop sequences take approximately 10ms to com-
pletely slew the volume from full scale to mute. Set the
S1SDI/S2SDI bits to enable the DACs after DACLEN
and DACREN (register 0x1B, bits B7 and B6) are set
for clean startup transitions. Likewise, clear
S1SDI/S2SDI before clearing DACLEN and DACREN.
1 = Left and right digital input signals mixed to mono
and output to the left channel.
0 = Stereo left and right digital signals maintained.
Table 12. Audio Interface S1
Stereo Audio CODECs with Microphone, DirectDrive
REG
0x03
0x04
0x05
0x06
Headphones, Speaker Amplifiers, or Line Outputs
Serial Input Mono Mix Enable (S1MNO/S2MNO)
Serial Data Output Enable (S1SDO/S2SDO)
Serial Data Input Enable (S1SDI/S2SDI)
S1SDO
S1MAS
S2SDO
S2MAS
B7
______________________________________________________________________________________
S1WCI
S2WCI
S1SDI
S2SDI
B6
S1MNO
S2MNO
S1BCI
S2BCI
B5
Audio Interface Registers (0x03, 0x04, 0x05, 0x06)
B4
0
0
0
0
The mono signal is digitally filtered and interpolated
through the left-channel digital filter while the right-chan-
nel digital filter is shut down. The output of the left-chan-
nel filter can be routed to either or both the left and right
DACs. The stereo inputs are not attenuated before mix-
ing to mono. Clipping can occur with large input signals.
S1MODE/S2MODE configures the MAX9851/MAX9853
for a specific audio sampling rate on the respective digi-
tal audio interface. Set S1MODE/S2MODE to 0x1 through
0x9 to configure the interface for stereo audio operation
at the specified sample rate. Set S1MODE/S2MODE to
0xA or 0xB to configure the interface to operate in voice
mode. The secondary digital audio interface is intend-
ed to be used primarily in modes 0x1 through 0x9 as
voiceband filtering is available only on the primary serial
interface. MCLK must be 26MHz when operating in
16kHz voice mode.
Table 13. Serial Interface Modes of
Operation
0xC, 0xD, 0xE, 0xF
S1DLY
S2DLY
B3
S1 MODE/
S2 MODE
0xA
0xB
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
Interface S1/S2 Mode (S1MODE/S2MODE)
B2
0
0
11.025
RATE
22.05
(kHz)
S1MODE
S2MODE
44.1
12
16
24
32
48
16
—
—
8
8
B1
Interface off
Stereo audio
Stereo audio
Stereo audio
Stereo audio
Stereo audio
Stereo audio
Stereo audio
Stereo audio
Stereo audio
Mono voice mode
Mono voice mode (MCLK
must be 26MHz)
Reserved
0
0
MODE
S1WS
S2WS
B0
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