參數(shù)資料
型號: UCB1100
廠商: NXP Semiconductors N.V.
英文描述: Advanced modem/audio analog front-end
中文描述: 先進的調(diào)制解調(diào)器/音頻模擬前端
文件頁數(shù): 11/36頁
文件大小: 290K
代理商: UCB1100
Philips Semiconductors
Preliminary specification
UCB1100
Advanced modem/audio analog front-end
1998 May 08
11
6.1.2
Audio Output Specifications
SYMBOL
PARAMETER
CONDITIONS
LIMITS
UNIT
MIN
TYP
MAX
V
OFFIA
offset error
No signal applied to micp
0
LSB
V
OOA
full scale output voltage
0dB attenuation,
16ohm speaker
differential Spkrp–Spkrn
3.2
V
pp
V
OFFOA
offset error
16ohm speaker
50
mV
pp
V
SPK
DC bias voltage
spkrp and spkrn pin
Audio output path enabled
1.4
V
A
SOA
attenuation step size
2.8
3.0
3.2
dB
NSOA
number of attenuation steps
24
A
MOA
maximum attenuation
69
dB
ROES
OA
resolution
12
bit
DNA
OA
differential non linearity DAC
0.9
LSB
THUD
OAS
total harmonic distortion
16
speaker
0dB attenuation
20Hz to 20kHz
0.5
2
%
THUD
OAH
total harmonic distortion
1k
headphone
0dB attenuation
20Hz to 20kHz bandwidth
0.03
%
SNR
OAS
signal to noise ratio
16
speaker
0dB attenuation
20Hz to 20kHz bandwidth
40
80
dB
SNR
OAH
signal to noise ratio,
1kH
headphone
0dB attenuation
20Hz to 20kHz bandwidth
65
80
dB
RIP
OA
pass band ripple
F
PLAO
< Fsig <– F
PHAO
0.5
dB
F
SUOA
cut off frequency upper stop band
0.6
F
SA
SBR
OA
stop band rejection
F
SHAO
<Fsig.<20kHz
70
dB
E
IOA
integrated out of band energy
F > 20kHz
30
mVrms
Z
SPKR
speaker impedance
8
16
NOTE:
Coding scheme for DAC input data is 2’s complement.
F
SHA
F
PHA
FREQUENCY (Hz)
F
PLA
RIP
OA
0dB
SBR
OA
SN00133
Figure 8.
Audio Output Filter Frequency Response
ááááááááááááááááá
ááááááááááááááááá
ááááááááááááááááá
ááááááááááááááááá
F
= 0.6 * F
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