AD1885JST Analog Devices Inc, AD1885JST Datasheet - Page 12

• Manufacturer Part Number: AD1885JST
• Description: IC AUDIO CODEC AC'97 48-LQFP
• Manufacturer: Analog Devices Inc
• Series: SoundMAX®r
• Type: Audio Codec '97r

Specifications of AD1885JST

• Rohs Status: RoHS non-compliant
• Data Interface: Serial
• Resolution (bits): 16 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 87 / 90
• Voltage - Supply, Analog: 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3.15 V ~ 3.45 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP

AD1885
Reset (Index 00h)
Note: Writing any value to this register performs a register reset, which causes all registers to revert to their default values (except
74h, which forces the serial configuration). Reading this register returns the ID code of the part and a code for the type of 3D Stereo
Enhancement.
ID[9:0] Identify Capability. The ID decodes the capabilities of AD1885 based on the following:
SE[4:0] Stereo Enhancement. The 3D stereo enhancement identifies the Analog Devices 3D stereo enhancement.
Master Volume Registers (Index 02h)
RMV[5:0]
LMV[5:0]
MM
R g
R g
R g
R g
R
N m
N m
N m
N m
N
2 0 h
2 0 h
2 0 h
2 0 h
2 0
R g
R g
R g
R g
R
N m
N m
N m
N m
N
0 0 h
0 0 h
0 0 h
0 0 h
0 0
e
e
e
e
e
u
u
u
u
u
e
e
e
e
e
u
u
u
u
u
h
h
g
m
g
m
N
N
N
N
N
M
M
M
M
M
V
V
V
V
V
N
N
N
N
N
R
R
R
R
R
a
a
a
o
o
o
o
o
a
a
a
a
a
a
a
s e
s e
s e
s e
s e
a
a
a
a
a
m
m
m
m
m
u l
u l
u l
u l
u l
m
m
m
t s
t s
t s
t s
t s
m
m
t e
t e
t e
t e
t e
m
m
m
m
m
e
e
e
e
e
r e
r e
r e
r e
r e
e
e
e
e
e
e
e
e
e
e
D 5 1
D 5 1
D 5 1
D 5 1
D
MM
MM
MM
MM
M
D 5 1
D 5 1
D 5 1
D 5 1
D
X X X X X
Right Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from
0 dB to a maximum attenuation of –94.5 dB.
Left Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from 0 dB to
a maximum attenuation of –94.5 dB.
Master Volume Mute. When this bit is set to “1,” the channel is muted.
5 1
M
5 1
D 4 1
D 4 1
D 4 1
D 4 1
D
X X X X X
D 4 1
D 4 1
D 4 1
S 4
S 4
S 4
D 4 1
D
S 4
S
E
E
E
E
E
4 1
4 1
4
D 3 1
D 3 1
D 3 1
D 3 1
D
L
L
L
L
L
Bit = 1
ID0
ID1
ID2
ID3
ID4
ID5
ID6
ID7
ID8
ID9
D 3 1
D 3 1
D 3 1
S 3
S 3
S 3
D 3 1
D
S 3
S
M
M
M
M
M
E
E
E
E
E
3 1
3 1
3
V
V
V
V
V
5
5
5
5
5
MM
0
0
0
1
D 2 1
D 2 1
D 2 1
D 2 1
D
L
L
L
L
L
D 2 1
D 2 1
D 2 1
S 2
S 2
S 2
D 2 1
D
S 2
S
M
M
M
M
M
E
E
E
E
E
2 1
2 1
2
V
V
V
V
V
4
4
4
4
4
D 1 1
D 1 1
D 1 1
D 1 1
D
L
L
L
L
L
D 1 1
D 1 1
D 1 1
S 1
S 1
S 1
D 1 1
D
S 1
S
M
M
M
M
M
E
E
E
E
E
1 1
1 1
1
V
V
V
V
V
Function
Dedicated MIC PCM In Channel
Modem Line Codec Support
Bass and Treble Control
Simulated Stereo (Mono to Stereo)
Headphone Out Support
Loudness (Bass Boost) Support
18-Bit DAC Resolution
20-Bit DAC Resolution
18-Bit ADC Resolution
20-Bit ADC Resolution
3
3
3
3
3
xMV5 . . . xMV0
00 0000
01 1111
11 1111
xx xxxx
D 0 1
D 0 1
D 0 1
D 0 1
D
L
L
L
L
L
D 0 1
D 0 1
D 0 1
D 0 1
D
S 0
S 0
S 0
S 0
S
M
M
M
M
M
E
E
E
E
E
0 1
0 1
0
V
V
V
V
V
2
2
2
2
2
D9
D9
D9
D9
D
L
L
L
L
L
D9
D9
D9
D
D9
I 9
I 9
I 9
I 9
I
D
D
D
D
D
M
M
M
M
M
9
9
9
V
V
V
V
V
1
1
1
1
1
D8
D8
D8
D8
D
L
L
L
L
L
D8
D8
D8
D
D8
I 8
I 8
I 8
I 8
I
D
D
D
D
D
M
M
M
M
M
8
8
8
V
V
V
V
V
0
0
0
0
0
D7
D7
D7
D7
D
D7
D7
D7
D
D7
I 7
I 7
I 7
I 7
I
X X X X X
D
D
D
D
D
7
7
7
Function
0 dB Attenuation
–46.5 dB Attenuation
–94.5 dB Attenuation
–
∞
D6
D6
D6
D6
D
D6
D6
D6
D
D6
I 6
I 6
I 6
I 6
I
X X X X X
D
D
D
D
D
6
6
dB Attenuation
6
D5
D5
D5
R
R
R
D5
D
R
R
D5
D5
D5
D
D5
I 5
I 5
I 5
I 5
I
D
D
D
D
D
M
M
M
M
M
5
5
5
V
V
V
V
V
5
5
5
5
5
D4
D4
D4
R
R
R
D4
D
R
R
D4
D4
D4
D
D4
I 4
I 4
I 4
I 4
I
D
D
D
D
D
M
M
M
M
M
4
AD1885
0
0
0
0
1
0
0
0
0
0
4
4
V
V
V
V
V
4
4
4
4
4
D3
D3
D3
D3
D
R
R
R
R
R
D3
D3
D3
D
D3
I 3
I 3
I 3
I 3
I
D
D
D
D
D
M
M
M
M
M
3
3
3
V
V
V
V
V
3
3
3
3
3
D2
D2
D2
D2
D
R
R
R
R
R
D2
D2
D2
D
D2
I 2
I 2
I 2
I 2
I
D
D
D
D
D
M
M
M
M
M
2
2
2
V
V
V
V
V
2
2
2
2
2
D1
D1
D1
D1
D
R
R
R
R
R
D1
D1
D1
D
D1
I 1
I 1
I 1
I 1
I
D
D
D
D
D
M
M
M
M
M
1
1
1
V
V
V
V
V
1
1
1
1
1
D0
D0
D0
D0
D
R
R
R
R
R
D0
D0
D0
D
D0
I 0
I 0
I 0
I 0
I
D
D
D
D
D
M
M
M
M
M
0
0
0
V
V
V
V
V
0
0
0
0
0
D
D
D
D
D
0 8 h
0 8 h
0 8 h
0 8
0 8
D
D
D
D
D
4 0 h
4 0 h
4 0 h
4 0
4 0
e
e
e
e
e
e
e
e
0 0
0 0
0 0
0 0
0 0
e
e
0 1
0 1
0 1
0 1
0 1
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
h
h
u
u
u
u
u
h
h
u
u
u
u
u
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l