msm7603 Oki Semiconductor, msm7603 Datasheet - Page 15

• Manufacturer Part Number: msm7603
• Description: Echo Canceler
• Manufacturer: Oki Semiconductor

¡ Semiconductor
ECHO CANCELER CHARACTERISTICS DIAGRAM
(for m m m m m -law and A-law, and for reference only)
Note:
40
30
20
10
30
20
10
0
0
Measurement Conditions :
RIN input = –10 dBm0 5 kHz band white noise
Echo delay time T
ATT, GC, NLP = OFF
Power supply voltage 5 V
E. R. L. vs. echo attenuation
0
Above characteristics are for the MSM7533 (V
MSM7704 (V
for input and output levels. Refer to the PCM CODEC data sheet.
40
MSM7533
MSM7704
10
30
Echo delay time [ms]
E. R. L. [dB]
20
20
D
= 50 ms
DD
Echo delay time vs. echo attenuation
10
30
(for both transmit and receive)
(for transmit side)
(for receive side)
3 V, m-law interface) the characteristics are basically the same except
0
40
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
50
40
30
20
10
0
Measurement Conditions :
RIN input: 5 kHz band white noise
Echo delay time T
E.R.L. = 6 dB
ATT, GC, NLP = OFF
Power supply voltage 5 V
Measurement Conditions :
RIN input = –10 dBm
5 kHz band white noise
E.R.L. = 6 dB
ATT, GC, NLP = OFF
Power supply voltage 5 V
DD
RIN input level vs. echo attenuation
–50 –40 –30 –20 –10
5 V, m-law CODEC interface). For the
RIN input level [dBm0]
D
= 50 ms
MSM7603/7603B
0
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