AK2308LV_05 Datasheet, PDF (24/31 Pages) Asahi Kasei Microsystems – SPEECH CODEC for Digital Key telephone

ASAHI KASEI
♦CODEC
[AK2308LV]
Absolute Gain (AK2308LV:VDD=3.3V +/-0.3V )
Parameter
Conditions
Analog Input Level
HANDT3 to DX
MIC3 to DX
1020Hz 0dBm0
input
Absolute Transmit Gain 1020Hz dBm0 input
u/A-law
Maximum input level
Analog Output Level
Absolute Receive Gain
DR to DAOUT
1020Hz 0dBm0 input
3.17dBm0(u-law)
3.14dBm0(A-law)
Maximum Overload Level DR to DAOUT
+3.14dBm0 input
Min Typ Max Units
0.101
Vrms
-1.5 - +1.5 dB
0.145
Vrms
0.482
Vrms
-1.5 - +1.5 dB
0.694
Vrms
Gain Tracking
Parameter
Conditions
Min
Transmit Gain Tracking Error Reference Level: -51dBm0 ~-46dBm0 -0.9
( A to D )
-10dBm0
-46dBm0 ~-36dBm0 -0.6
HANDT3 to DX, MIC3 to DX 1020Hz Tone
-36dBm0 ~ 0dBm0 -0.4
Receive Gain Tracking Error Reference Level: -51dBm0 ~-46dBm0 -0.9
( D to A )
-10dBm0
-46dBm0 ~-36dBm0 -0.6
DR to DAOUT
1020Hz Tone
-36dBm0 ~ 0dBm0 -0.4
The characteristics from MIC3 to DR path is guaranteed by the design.
Typ Max Units
-
0.9
-
0.6 dB
-
0.4
-
0.9
-
0.6 dB
-
0.4
Frequency Response
Parameter
Transmit Frequency Response
( A to D )
HANDT3 to DX
MIC3 to DX
Receive Frequency Response
( D to A )
DR to DAOUT
Conditions
Relative to:
0.06kHz
0dBm0@1020Hz 0.2kHz
0.3 ~3.0kHz
3.4kHz
3.78kHz
Relative to:
0.3K ~3.0kHz
0dBm0@1020Hz 3.4kHz
3.78kHz
Min Typ Max Units
24 -
-
0
-
2.5
-0.3 -
0.3 dB
0
-
0.8
6.5 -
-
-0.3 -
0.3
0
-
0.8 dB
6.5 -
-
Distortion
Parameter
Conditions
Min Typ Max Units
Transmit Signal to Distortion 1020Hz Tone
-36dBm0 ~-41dBm0 24 -
-
( D to A )
-26dBm0 ~-36dBm0 29 -
-
dB
HANDT3 to DX
0dBm0 ~-26dBm0
35 -
-
MIC3 to DX
Receive Signal to Distortion
1020Hz Tone
-36dBm0 ~-41dBm0 24 -
-
( A to D )
-26dBm0 ~-36dBm0 29 -
-
dB
DR to DAOUT
0dBm0 ~-26dBm0 35 -
-
Note) C-message Weighted for u-Law, Psophometric Weighted for A-Law
MS0227-E-01
24
2005/12