AD1849KP Analog Devices Inc, AD1849KP Datasheet - Page 24

• Manufacturer Part Number: AD1849KP
• Description: IC CODEC STEREO 5V 16BIT 44PLCC
• Manufacturer: Analog Devices Inc
• Type: Stereo Audior

Specifications of AD1849KP

• 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: 83 / 86
• Voltage - Supply, Analog: 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 4.75 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC

AD1849K
Analog Devices recommends a split ground plane as shown in
Figure 22. The analog plane and the digital plane are connected
directly under the AD1849K. Splitting the ground plane directly
under the SoundPort Codec is optimal because analog pins will
be located above the analog ground plane and digital pins will
be located directly above the digital ground plane for the best
isolation. The digital ground and analog grounds should be tied
together in the vicinity of the AD1849K. Other schemes may
also yield satisfactory results.
Figure 23 illustrates the “zero-chip” interfaces of the AD1849K
SoundPort Codec to four of Analog Devices’ Fixed-Point DSµPs.
The ADSP-2111, ADSP-2101 and ADSP-2115 use their multi-
channel serial port for the data interface and flag outputs for
D/C. The ADSP-2105 has a single serial port which operates in
its frameless mode. Because the ADSP-2105 lacks a flag output, it
alone does require additional circuitry to generate D/C. Shown is
an implementation using a single D-flop, an OR-gate, and two
pull-down resistors.
Low level ADSP-21xx software drivers for the AD1849K are
supplied with the AD1849K Evaluation Board. Source and
object codes arc available from your Analog Devices Sales
LINE IN
UNUSED INPUTS SHOULD BE GROUNDED AND NC'S LEFT UNCONNECTED
10 F
V
SUPPLY
DD
5.1k
560pF
5.1k
560pF
NPO
NPO
5V
1 F
47k
INPUT CIRCUIT
MICROPHONE
PREFERRED
10 F
0.1 F
5.1k
5.1k
1 F
FERRITE
0.33 F
0.33 F
0.1 F
1 F
LINL
LINR
MINL
MINR
CMOUT
V
C0
C1
GNDA
GNDA
PDN
PIO0
PIO1
GNDD
V
REF
DD
0.1 F
GNDD GNDD
AD1849K
V
DD
0.1 F
LOUT0R
LOUT1R
LOUT1C
LOUT0L
LOUT1L
MOUTR
COUT1
COUT2
RESET
FSYNC
MOUT
SDRX
SCLK
SDTX
CIN1
CIN2
TSIN
V
V
V
DD
CC
CC
0.1 F
0.1 F
FERRITE
1 F
1 F
LINE OUT 1 OR
HEADPHONE
PREFERRED
CIRCUIT
1 F
1 F
1.6
47k
47k
16.9344MHz
24.576MHz
MONO
SPEAKER
20–64pF
0.1 F
LINE
OUT 0
20k
Representative or on the Analog Devices DSP Bulletin Board.
The DSP Bulletin Board telephone number is 781-461-4258,
8 data bits, no parity, 1 stop bit, 300 to 2400 baud.
Note that the interface to the Texas Instruments TMS320C25
must be significantly more complicated than these three examples
because the C25’s serial port cannot be a master, which is
required of the external controller during Control Mode.
µ
ADSP-2101
ADSP-2115
DIGITAL GROUND PLANE
ADSP-2111
ADSP-2105
RESET
SCLK0
SCLK0
SCLK
RFS0
RFS0
DMS
DR0
DR0
RFS
DT0
DT0
TFS
FL0
WR
FO
DR
DT
D8
AD1849K
NC
PDN
D
10k
10k
LOUT0R
CLR
C0
Q
ANALOG GROUND PLANE
SCLK
FSYNC
TSIN
SDRX
SDTX
D/C
SCLK
FSYNC
TSIN
SDRX
SDTX
D/C
SCLK
FSYNC
TSIN
SDRX
SDTX
D/C
AD1849K
AD1849K
AD1849K
RESET