AK2308LV_05 Datasheet, PDF (25/31 Pages) Asahi Kasei Microsystems – SPEECH CODEC for Digital Key telephone

ASAHI KASEI
[AK2308LV]
Noise
Parameter
Conditions
Min Typ Max Units
Idle Channel Noise ¹⁾
u-law, C-message
-
8
16 dBrnC0
AtoD
HANDT1,2 to DX
A-law, Psophometric
-
-82 -74 dBm0p
MIC2 to DX
Idle Channel Noise ²⁾
u-law, C-message
-
2
9 dBrnC0
DtoA
A-law, Psophometric
-
-88 -81 dBm0p
DR to DAOUT
Idle Channel Noise ²⁾
u-law, C-message
-
3
10 dBrnC0
DtoA
A-law, Psophometric
-
-87 -80 dBm0p
DR to HANDR
DR to SPOP/SPON
Note 1) Analog Input = Analog Ground. The gain of Handset MIC and MIC input is assumed as +25dB.
SCLK is not supplied.
Note 2) Digital Input(DR) = +0 Code
Interchannel Crosstalk
Parameter
Transmit to Receive
HANDT3 to DAOUT
MIC3 to DAOUT
Receive to Transmit
DX to DR
Conditions
Min Typ Max Units
0dBm0@HANDT4, Idle PCM code@DR -
-70
- dB
0dBm0 code@DR, HANDT4 = 0 Vrms
-
-70
- dB
♦Voice Path
RX voice path Volume
Parameter
Step margin
Volume
Conditions
Min typ max Unit
VOL1
1020Hz 0dBm0 input at DR
+12to-12dB
Relative to: 0dB
-1.0
0
+1.0*) dB
VOL2
+8to-12dB
-14to-18dB
1020Hz 0dBm0 input at DR
Relative to: 0dB
-1.0
0
+1.0*) _dB
-1.5
0
+1.5
VOL3
1020Hz 0dBm0 input at DR
+6/0/-6dB
Relative to: 0dB
-1.0
0
+1.0 dB
*)Monotonus increase/decrease is guaranteed
RX Amp for Handset receiver
Parameter
SINAD
HANDI to
Gain error
HANDR
Gain error
TONEI to
HANDR
(-25dB gain)
Signal attenuation HANDI to
of speaker mute
HANDR
TONEI to
HANDR
Conditions
1.0Vp-p@1020Hz input
(0 to 30kHz)
1.0Vp-p@1020Hz input
(0 to 30kHz)
2.0Vp-p@1020Hz input
SW4: 0 to 1
1.0Vp-p@1020Hz input
SW6:0 to 1
MIN TYP MAX Unit
40
-
dB
-1.5
0
+1.5
-2
0
+2
60
-
-
40
-
-
MS0227-E-01
25
2005/12