Specifications

AN93

20 Rev. 0.9

2.3.2. Analog Output

Figure 8 illustrates an optional application circuit to support the analog output capability of the Si2493/57/34/15/04

for call progress monitoring.

Figure 8. Optional Connection to AOUT for a Monitoring Speaker

Table 8. Component Values—Optional Connection to AOUT

Symbol Value

C2, C3, C5 0.1 µF, 16 V, ±20%

C4 100 µF, 16 V, Elec. ±20%

C6 820 pF, 16 V, ±20%

R1 10 kΩ, 1/10 W, ±5%

R2 10 Ω, 1/10 W, ±5%

R3 47 kΩ, 1/10 W, ±5%

U1 LM386

AOUT

Speaker

+5 V

–

C2 R3