AK2305 Datasheet, PDF (32/43 Pages) Asahi Kasei Microsystems – Dual PCM CODEC for ISDN TERMINAL ADAPTER

Tone Generator
Conditions
Signal
381
1300Hz
-11
Out of band noize level 4k-8kHz
Note) dBm = decibels above or below a reference power of 1mW into a 600
P = output level of in band transmit signal.
typ
1300
Units
419
Hz
-9
dB
P-40
P-60
Parameter
Valid Input Signal Levels
signal)
Note3,6,8
Frequecy Deviation accept
Frequecy Deviation Reject
Third Tone Tolerance
Noise Tolerance
Dial Tone Tolerance
Input Impeedance
min
Max
-19
dBm
10
±
±
±
-16
-12
-17
500
Ω
Note2)Both tones of the composite signal have equal amplitudes.
±
±
Note4)Bandwidth limited to 3kHz Gaussian noise.
±
±
Note6)For error rate of better than 1 in 10,000.
Note8)Twist = high tone / low tone
dBm = decibels above or below a reference power of 1mW into a 600
C0029-E-02