參數(shù)資料
型號： UPD9903GT
廠商： NEC Corp.
元件分類： Codec
英文描述： UPD9903 ANALOG SUBSCRIBER LINE LSI DIGITAL CODEC
中文描述： UPD9903模擬用戶線數(shù)字編解碼器大規(guī)模集成電路
文件頁數(shù)： 20/28頁
文件大小： 135K
代理商： UPD9903GT
μ
PD9903
20
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Units
Absolute delay
characteristics
D
A
A-A Input signal 0 dBm0
540
μ
s
Absolute delay distortion
frequency characteristics
D
O
A-A
500 Hz
600 HZ
1400
700
200
1400
1000 to 2600 Hz
2800 Hz
Intermodulation (2 Tone)
IMD
A-D Input signal
f1, f2: 300 to 3400 Hz
–4 to –21 dBm0
Measurement signal: 2
×
f1 – f2
level (2
×
f1 – f2) vs level (f1, f2)
44.0
dB
D-A Input signal
f1, f2: 300 to 3400 Hz
–4 to –21 dBm0
Measurement signal: 2
×
f1 – f2
level (2
×
f1 – f2) vs level (f1, f2)
44.0
Single frequency noise
N
SF
D-A
PAD level set at 0 dB
Measurement signal up to f = 256 kHz
–54
dBm0
Deviation in gain setting
for transmission channel
DGS
X
A-D
Difference from reference set value
Setting value: +7.5 to +3.0 dB
+3.0 to –3.5 dB
dB
–0.2
–0.1
+0.2
+0.1
Deviation in gain setting
for reception chanel
DGS
R
D-A
Difference from reference set value
Setting value: 0.0 to –5.0 dB
–5.0 to –8.5 dB
–0.1
–0.2
+0.1
+0.2
Idle circuit noise
IDN
24
2W-4W
A-law
Psophometric weighted
–67
dBm0p
μ
-law
C message weighted
23
dBrnc0
IDN
42
4W-2W
A-law
Psophometric weighted
–76
dBm0p
μ
-law
C message weighted
14
dBrnc0
Line to ground balance
attenuation
LCL
R
F
= 50
Relative accuracy = 0.5 %
f = 300 to 600 Hz
f = 600 to 3400 Hz
42
48
dB
AC induction noise
resistance
LFI
I
L
= 0 mA V
IN
= 6 V
rms
43
dBrnc
I
L
= 20 mA V
IN
= 15 V
rms
20
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