UDA1345 PHILIPS [NXP Semiconductors], UDA1345 Datasheet - Page 22

• Manufacturer Part Number: UDA1345
• Description: Economy audio CODEC
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
APPLICATION INFORMATION
The application information as given in Fig.9, is an optimum application environment. Simplification is possible at the cost
of some performance degradation. The following notes apply:
2000 Apr 18
The capacitors at the output of the DAC can be reduced. It should be noted that the cut-off frequency of the DC filter
also changes.
The capacitors at the input of the ADC can also be reduced. It should be noted that the cut-off frequency of the
capacitor with the 12 k input resistance of the ADC will also change.
Economy audio CODEC
ground
system
overload
clock
input
input
right
flag
left
3 V
X4
X5
8LM32A07
8LM32A07
L1
L2
(16 V)
(16 V)
47 F
47 F
C1
C6
47
100 F
R30
(16 V)
C12
100 F
(16 V)
C11
V DDA
V DDD
SYSCLK
DATAO
DATAI
VINR
VINL
BCK
MP1
MP2
MP3
MP4
WS
12
18
16
17
19
13
14
15
9
3
5
1
V SSA(ADC)
100 F
100 nF
(16 V)
(63 V)
C21
C2
Fig.9 Application diagram.
V SSO
27
100 F
100 nF
2
(16 V)
(63 V)
C26
V DDA(ADC) V ADCN
V DDA
C7
R21
1
V DDO
25
UDA1345TS
V DDO
10
R25
1
22
R24
6
100 nF
(63 V)
C25
22
V SSA(DAC)
7
V ADCP
100 nF
100 F
(63 V)
(16 V)
C27
C10
11
V DDA
V SSD
23
V DDA(DAC)
R29
1
V DDD
10
V DDD
R28
10
26
24
28
4
V ref(A)
VOUTL
VOUTR
V ref(D)
(16 V)
(16 V)
47 F
47 F
C5
C8
C23
100 nF
(63 V)
C22
100 nF
(63 V)
Preliminary specification
R22
10 k
R27
10 k
UDA1345TS
100
100
C3
47 F
(16 V)
R26
R23
C4
47 F
(16 V)
X2
X3
MGS877
output
output
right
left