ml50000 Oki Semiconductor, ml50000 Datasheet - Page 20

• Manufacturer Part Number: ml50000
• Description: Echo Canceler
• Manufacturer: Oki Semiconductor

Note:
¡ Semiconductor
ECHO CANCELER CHARACTERISTICS DIAGRAM
40
30
20
10
40
30
20
10
The characteristics above are for the MSM7533 (V
MSM7704 (V
and output levels. Refer to are PCM CODEC data sheet.
0
0
Measurement Conditions
RIN input = –20 dBm 5 kHz band white noise
Echo delay time T
ATT, GC, NLP = OFF
Power supply voltage 5 V
0
MSM7533
MSM7704
MSM7704
40
ERL vs. echo attenuation
30
1
20
DD
ERL [dB]
50
D
= 20 ms
10
(for both transmit and receive)
(for transmit side)
(for receive side)
3 V, m-law interface) provides the same characleristics without input
Echo delay time vs. echo attenuation
2
0
ML50000
MSM7602
Echo delay time [ms]
0 dBm0 = 0.85 Vrms = 0.8 dBm (600 W)
0 dBm0 = 0.35 Vrms = –6.9 dBm (600 W)
0 dBm0 = 0.5 Vrms = –3.8 dBm (600 W)
–10
100
150
60
50
40
30
20
10
0
Measurement Conditions
RIN input: 5 kHz band white noise
Echo delay time T
ERL = 6 dB
Power supply voltage 5 V
–50 –40 –30 –20 –10
RIN input level vs. echo attenuation
200
RIN input level [dBm0]
DD
Measurement Conditions
RIN input = –10 dBm
5 kHz band white noise
ERL = 6 dB
ATT, GC, NLP = OFF
The second through seventh chips
are connected in a cascade.
Power supply voltage 5 V
D
5 V, m-law interface). The
= 20 ms
ATT, GC, NLP=OFF
ATT, GC=OFF
NLP=ON
0
ML50000
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