SI3012-KS Silicon Laboratories Inc, SI3012-KS Datasheet - Page 19

• Manufacturer Part Number: SI3012-KS
• Description: IC ISOMODEM SYSTEM-SIDE 16SOIC
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3012-KS

• Data Format: V.90
• Interface: Serial
• Voltage - Supply: 3.3 V ~ 5 V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Baud Rates: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Analog Output
Figure 20 illustrates an optional application circuit to support the analog output capability of the Si3038 for call
progress monitoring purposes. The AOUT level can be set to 0 dB, –6 dB, –12 dB, and mute for both transmit and
receive paths through the ATM/ARM bits in register 5Ch. U1 provides a gain of 26 dB. Additional gain adjustments
may be made by varying the voltage divider created by R1 and R3.
‘
AOUT
Figure 20. Optional Connection to AOUT for a Call Progress Speaker
C1
Table 18. Component Values—Optional Connection to AOUT
C2
R3
C2, C3, C5
Symbol
C1
C4
C6
R1
R2
R3
U1
C6
100 µF, 16 V, Elec. ±20%
R1
Rev. 2.01
2200 pF, 16 V, ±20%
10 kΩ, 1/10 W, ±5%
47 kΩ, 1/10 W, ±5%
820 pF, 16 V, ±20%
0.1 µF, 16 V, ±20%
10 Ω, 1/10 W, ±5%
LM386
Value
3
2
+
–
+5 V
6
4
U1
5
C3
C5
R2
+
C4
Speaker
Si3038
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