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PDF AD1887 Data sheet ( Hoja de datos )
| Número de pieza | AD1887 | |
| Descripción | AC97 SoundMAX Codec | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AD1887 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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AC’97 2.1 FEATURES
Variable Sample Rate Audio
AC’97 FEATURES
AC’97 2.2 Compliant
Greater than 90 dB Dynamic Range
Integrated Stereo Headphone Amplifier
Multibit ⌺-⌬ Converter Architecture for Improved S/N
Ratio Greater than 90 dB
16-Bit Stereo Full-Duplex Codec
Two Analog Line-Level Stereo Inputs for:
LINE-IN and CD
Mono MIC Input with Built-In Programmable Preamp
High-Quality CD Input with Ground Sense
Power Management Support
48-Terminal TQFP Package
AC’97 SoundMAX® Codec
AD1887
ENHANCED FEATURES
Full Duplex Variable Sample Rates from 7040 Hz to
48 kHz with 1 Hz Resolution
Software-Enabled VREFOUT Output for Microphones and
External Power Amp
Split Power Supplies (3.3 V Digital/5 V Analog)
Mobile Low-Power Mixer Mode
Extended 6-Bit Headphone Volume Control
Digital Audio Mixer Mode
FUNCTIONAL BLOCK DIAGRAM
ID0 ID1
MIC
LINE_IN
CD
AD1887
MIC
PREAMP
HP_OUT_L
HP M GA
HP_OUT_R
HP M GA
CHIP SELECT
VREF
VREFOUT
GA GA GA GA GA
MMMMM
M
G = GAIN
A = ATTENUATE
M = MUTE
M
PGA
16-BIT
⌺-⌬ A/D
CONVERTER
PGA
16-BIT
⌺-⌬ A/D
CONVERTER
SAMPLE
RATE
GENERATORS
M GA
16-BIT
⌺-⌬ A/D
CONVERTER
M GA
16-BIT
⌺-⌬ A/D
CONVERTER
OSCILLATOR
XTL_OUT XTL_IN
AC
LINK
RESET
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
SoundMAX is a registered trademark of Analog Devices, Inc.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001
1 page  
RESET
BIT_CLK
tRST_LOW
tRST2CLK
Figure 1. Cold Reset
SYNC
BIT_CLK
tSYNC_HIGH
tRST2CLK
Figure 2. Warm Reset
BIT_CLK
SYNC
tCLK_ LOW
tCLK_ HIGH
tCLK_PERIOD
tSYNC_LOW
tSYNC_HIGH
tSYNC_PERIOD
Figure 3. Clock Timing
tSETUP
BIT_CLK
SYNC
SDATA_OUT
tHOLD
Figure 4. Data Setup and Hold
AD1887
BIT_CLK
tRISECLK
tFALLCLK
SYNC
tRISESYNC
tFALLSYNC
SDATA_IN
tRISEDIN
tFALLDIN
SDATA_OUT
tRISEDOUT
tFALLDOUT
Figure 5. Signal Rise and Fall Time
SYNC SLOT 1 SLOT 2
BIT_CLK
SDATA_OUT
WRITE
TO 0x26
DATA
PR4
DON’T
CARE
tS2_PDOWN
SDATA_IN
NOTE: BIT_CLK NOT TO SCALE
Figure 6. AC Link Low Power Mode Timing
RESET
SDATA_OUT
SDATA_IN, BIT_CLK
tSETUP2RST
HI-Z
tOFF
Figure 7. ATE Test Mode
REV. 0
–5–
5 Page 
AD1887
PCM Out Volume (Index 18h)
Reg
Num
18h
Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5
PCM Out
Volume
OM X
X
LOV4 LOV3 LOV2 LOV1 LOV0 X
X
X
D4 D3 D2 D1 D0 Default
ROV4 ROV3 ROV2 ROV1 ROV0 8808h
ROV[4:0]
LOV[4:0]
OM
Right PCM Out Volume. Allows setting the PCM right channel attenuator in 32 steps. The LSB represents 1.5 dB,
and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
Left PCM Out Volume. Allows setting the PCM left channel attenuator in 32 steps. The LSB represents 1.5 dB,
and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
PCM Out Volume Mute. When this bit is set to “1,” the channel is muted.
Volume Table (Index 0Ch to 18h)
Mute
0
0
0
1
x4 . . . x0
00000
01000
11111
xxxxx
Function
+12 dB Gain
0 dB Gain
–34.5 dB Gain
–∞ dB Gain
Record Select Control Register (Index 1Ah)
Reg
Num
1Ah
Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
Record Select X X X X X LS2 LS1 LS0 X X X X X RS2 RS1 RS0 0000h
RS[2:0]
Right Record Select
LS[2:0]
Left Record Select
Used to select the record source independently for right and left. See table for legend.
The default value is 0000h, which corresponds to Mic in.
LS2 . . . LS0
0
1
4
5
6
Left Record Source
MIC
CD_L
LINE_IN_L
Stereo Mix (L)
Mono Mix
RS2 . . . RS0
0
1
4
5
6
Right Record Source
MIC
CD_L
LINE_IN_R
Stereo Mix (R)
Mono Mix
Record Gain (Index 1Ch)
Reg
Name
Num
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
1Ch Record Gain IM X X X LIM3 LIM2 LIM1 LIM0 X X X X RIM3 RIM2 RIM1 RIM0 8000h
RIM[3:0]
LIM[3:0]
IM
Right Input Mixer Gain Control. Each LSB represents 1.5 dB, 0000 = 0 dB and the range is 0 dB to 22.5 dB.
Left Input Mixer Gain Control. Each LSB represents 1.5 dB, 0000 = 0 dB and the range is 0 dB to 22.5 dB.
Input Mute
0 = Unmuted
1 = Muted or –∞ dB Gain
IM xIM3 . . . xIM0 Function
0 1111
0 0000
1 xxxxx
22.5 dB Gain
0 dB Gain
–∞ dB Gain
REV. 0
–11–
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AD1887.PDF ] | |
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