MSM7540L Просмотр технического описания (PDF) - Oki Electric Industry

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Компоненты Описание

производитель

MSM7540L

Single Rail ADPCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7540L/7560L

AC Characteristics (Continued)

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

Condition

Parameter

Symbol Freq.

(Hz)

Level

(dBm0)

Min.

Others

Typ.

Max. Unit

Idle Channel Noise

NIDLT

—

NIDLR

—

AIN = SG (*1) —

(*1)

—

—

(*2)

–68

—

(–75.7) dBm0p

–72 (dBmp)

—

(–79.7)

Absolute Signal

Amplitude

AVT

1020

AVR

0.320

GSX2 0.285

0.359 Vrms

(*3)

0

0.320

VFRO 0.285

0.359 Vrms

(*3)

Power Supply Noise

PSRRT Noise Freq. Noise Level

—

30

—

—

dB

Rejection Ratio

PSRRR : 0 to 50 kHz : 50 mVPP

30

—

—

dB

tSDX

50

—

200 ns

Digital Output

Delay Time

tSDR

1 LSTTL + 100 pF,

50

—

200 ns

tXD1

—

—

50

Pull-up: 500 W

—

200 ns

tXD2

50

—

200 ns

tXD3

50

—

200 ns

*1 Use the P-message weighted filter

*2 PCMRI input code "11010101"(MSM7540L)

"11111111"(MSM7560L)

*3 0.320 Vrms = 0 dBm0 = –7.7 dBm

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

G.721.

11/15

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