ad1884a Analog Devices, Inc., ad1884a Datasheet - Page 11

• Manufacturer Part Number: ad1884a
• Description: High Definition Audio Soundmax Codec
• Manufacturer: Analog Devices, Inc.

Table 4. Pin Function Descriptions (Continued)
Mnemonic
POWER AND GROUND
The symbols used in this table are defined as: I = input, O = output, LI = line level input, LO = line level output, HP = output capable of driving
headphone load, MIC = input supports microphones with MIC bias and boost amplifier.
DV
FILTER
DV
DV
DV
AV
AV
DD
SS
CORE
IO
SS
DD
1.5 V or 3.3 V
3.3 V
1.7 V to 1.9 V or 3.3 V 9
1.7 V to 1.9 V or
Pin No.
1
3
7
25, 38
26, 42
I/O
I/O
I
I
I
I
I
Rev. 0 | Page 11 of 20 | March 2008
Description
CAUTION: DO NOT APPLY 3.3 V TO THIS PIN! Filter connection for internal core
voltage regulator.
If Pin 9 is connected to 3.3 V DV
1.0 μF, and 0.1μF connected in parallel between Pin 1 and DV
1.7 V to 1.9 V DV
Pin 9 MUST be connected to Pin 1 in this case.
Link Digital I/O Voltage Reference. 3.3 V ± 10% or 1.5 V ± 5.5%
Digital Supply Return (Ground).
Digital Supply Voltage 3.3 V ± 10%. This is regulated down to DV
supply the internal digital core internal to the AD1884A. Direct, filtered 1.7 V to 1.9 V
DV
connected to Pin 1 in this case.
CAUTION: DO NOT APPLY 5 V TO THESE PINS! Analog Supply Voltage 3.3 V ± 5%.
Note: AV
audio performance.
Analog Supply Return (Ground). AV
conductive trace under, or close to, the AD1884A.
DD
can be applied to Pin 1 to lower the digital power requirements. Pin 9 MUST be
DD
supplies should be well regulated and filtered as supply noise degrades
DD
can be applied to Pin 1 to lower the digital power requirements.
DD
, this pin must be connected to filter caps: 10 μF,
SS
should be connected to DV
SS
(Pin 7). Direct, filtered
CORE
SS
using a
on Pin 1 to
AD1884A