MSM7570L-01 Ver la hoja de datos (PDF) - Oki Electric Industry

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Fabricante

MSM7570L-01

Multi-Function ADPCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7570L-01/02

AC Characteristics (DTMF and Other Tones)

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

Parameter

Symbol

Condition

Min. Typ. Max. Unit

Frequency Difference

Original (reference)

Tone Signal Level

*4

DFT1 DTMF Tones

–7

—

+7

Hz

DFT2 Other Tones

–7

—

+7

Hz

VTL Transmit Tones DTMF (Low)

–18

–16

–14 dBm0

DTMF (High)

VTH

(Gain setting 0dB)

and Other Tones

–16

–14

–12 dBm0

VRL Receive Tones DTMF (Low)

–10

–8

–6 dBm0

(Tone generator DTMF (High)

VRH gain setting –6dB) and Other Tones

–8

–6

–4 dBm0

Relative Level of

DTMF Tones

RDTMF VTH/VTL, VRH/VRL

1

2

3 dBm0

*4 Does not contain the setting value set for the programmable gain

AC Characteristics (Programmable Gain Stages)

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

Parameter

Symbol

Condition

Min. Typ. Max. Unit

Gain Accuracy

DG All gain stages, to programmed value –1

0

+1

dB

AC Characteristics (VOX Function)

Parameter

Symbol

Condition

Transmit VOX Detect Time tVXON

(Voice Signal ON/OFF Detect Time) tVXOF

OFF Æ ON

ON Æ OFF

VOXO,

See Fig.2

Transmit VOX Detect Level

Accuracy

DVX To the values (CR6-B6, B5)

(Threshold Level)

*5 When single tone is input at 1000Hz

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

Min. Typ. Max. Unit

—

10 *5

—

ms

150/310 160/320 170/330 ms

–2.5

0

+2.5 dB

15/26

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