MSM7718-01 查看數據表（PDF） - Oki Electric Industry

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MSM7718-01

Echo Canceler with ADPCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7718-01

AC Characteristics

Parameter

(VDD = 2.7 to 3.6 V, Ta = –25 to +70°C)

Symbol

Condition

Min. Typ. Max. Unit

Freq.(Hz) level (dBm0) Others

LOSS T1 0-60

25 — —

LOSS T2 300-3k

–0.15 — +0.2

LOSS T3

Transmit Frequency Response LOSS T4

1020

3300

Reference

dB

0

—

–0.15 — +0.8

LOSS T5 3400

0

— 0.8

LOSS T6 3968.75

13 — —

LOSS R1 0-3000

–0.15 — +0.2

LOSS R2 1020

Reference

Receive Frequency Response LOSS R3 3300

0

— –0.15 — +0.8 dB

LOSS R4 3400

0

— 0.8

LOSS R5 3968.75

13 — —

SD T1

3

35 — —

SD T2

0

35 — —

Transmit Signal to Distortion SD T3 1020

–30

(*2) 35 — — dB

SD T4

–40

28 — —

SD T5

–45

23 — —

SD R1

3

35 — —

SD R2

0

35 — —

Receive Signal to Distortion SD R3 1020

–30

(*2) 35 — — dB

SD R4

–40

28 — —

SD R5

–45

23 — —

GT T1

3

–0.2 — +0.2

GT T2

–10

Reference

Transmit Gain Tracking

GT T3 1020

–40

— –0.2 — +0.2 dB

GT T4

–50

–0.5 — +0.5

GT T5

–55

–1.2 — +1.2

GT R1

3

–0.2 — +0.2

Receive Gain Tracking

GT R2

GT R3

1020

–10

Reference

–40

— –0.2 — +0.2 dB

GT R4

–50

–0.5 — +0.5

GT R5

–55

–1.2 — +1.2

Idle Channel Noise

NIDLT

—

NIDLR

—

AIN=SG

(*3)

(*2) —

(*2) —

— –68 dBm0p

(–75.7) (dBmp)

–72 dBm0p

—

(79.7) (dBmp)

Absolute Signal Amplitude

Power Supply Noise

Rejection Ratio

AVT

AVR

PSRRT

PSRRR

1020

Noise Freq.:

0 to 50 kHz

0

Noise Level:

50 mVpp

GSX2

VFRO

—

0.285 0.32(*4) 0.359

0.285 0.32(*4) 0.359

30 — —

30 — —

Vrms

Vrms

dB

dB

*2. P-message weighted filter used

*3. PCMPCI input code: “11111111” (m-law)

*4. 0.320 Vrms=0 dBm0=–7.7 dBm

Note : All ADPCM coder and decoder characteristics fully comply with ITU-T Recommendations

G.726.

18/38

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