AS2524B austriamicrosystems AG, AS2524B Datasheet - Page 7

• Manufacturer Part Number: AS2524B
• Description: Telephone Line Interface and Speakerphone Circuit
• Manufacturer: austriamicrosystems AG

Data Sheet AS2523, AS2524, AS2524B
Typical Characteristics of Line Loss Compensation (AS2523, AS2524B only)
The line-loss-compensation is programmable at the AS2523, not activated at the AS2524 and LLC high (45mA-75mA) activated
at the AS2524B.
Revision 1.12, Preliminary
(dB)
(dB)
+4
+3
+2
+1
35
34
33
32
31
30
29
-1
-2
0
Tx Gain
Rx Gain
f = 800 Hz
Z
V
f = 800 Hz
Z
V
VOL = 0 dB (neutral)
LINE
LINE
LS
LS
= -10 dBm
= -10 dBm
= 600
= 600
20
20
Figure 2 Typical Rx Gain Characteristics Line Loss Compensation
Figure 1 Typical Tx Gain Characteristics Line Loss Compensation
30
30
LLC low
(AS2523)
LLC low
(AS2523)
40
40
50
50
No LLC (AS2523, AS2524)
No LLC (AS2523, AS2524)
LLC high
(AS2523,AS2524B)
LLC high
(AS2523,AS2524B)
60
60
70
70
austriamicrosystems
80
80
DC Line
Current
DC Line
Current
(mA)
(mA)
Page 7 of 19