SI3016-F-FS Silicon Laboratories Inc, SI3016-F-FS Datasheet - Page 20

• Manufacturer Part Number: SI3016-F-FS
• Description: IC ISOMODEM LINE-SIDE DAA 16SOIC
• Manufacturer: Silicon Laboratories Inc
• Type: Chipsetr

Specifications of SI3016-F-FS

• Package / Case: 16-SOIC (3.9mm Width)
• Data Format: V.90
• Baud Rates: 56k
• Interface: Serial
• Voltage - Supply: 3.3V, 5V
• Mounting Type: Surface Mount
• Product: Modem Chip
• Supply Current: 0.3 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Si3016
Alternatively, when a billing tone is detected, the system
software may notify the user that a billing tone has
occurred. This notification can be used to prompt the
user to contact the telephone company and have the
billing tones disabled or to purchase an external LC filter.
4.16. Billing Tone Filter (Optional)
In order to operate without degradation during billing
tones in Germany, Switzerland, and South Africa, an
external LC notch filter is required. (The Si3016 can
remain off-hook during a billing tone event, but modem
data will be lost in the presence of large billing tone
signals.) The notch filter design requires two notches,
one at 12 KHz and one at 16 KHz. Because these
components are fairly expensive and few countries
supply billing tone support, this filter is typically placed
in an external dongle or added as a population option
for these countries. Figure 14 shows an example billing
tone filter.
L1 must carry the entire loop current. The series
resistance of the inductors is important to achieve a
narrow and deep notch. This design has more than
25 dB of attenuation at both 12 KHz and 16 KHz.
20
Table 11. Component Values—Optional Billing
From Line
RING
Symbol
C1,C2
TIP
C3
L1
L2
Figure 14. Billing Tone Filter
3.3 mH, >120 mA, <10 Ω, ±10%
10 mH, >40 mA, <10 Ω, ±10%
Tone Filters
0.027 µF, 50 V, ±10%
0.01 µF, 250 V, ±10%
C1
C2
L1
Value
C3
L2
DAA
To
Rev. 1.0
The billing tone filter affects the ac termination and
return loss. The current complex ac termination will
pass worldwide return loss specifications both with and
without the billing tone filter by at least 3 dB. The ac
termination is optimized for frequency response and
hybrid cancellation, while having greater than 4 dB of
margin with or without the dongle for South Africa,
Australia, CTR21, German, and Swiss country-specific
specifications.
4.17. On-Hook Line Monitor
The Si3016 allows the user to receive line activity when
in an on-hook state. This is accomplished through a
low-power ADC located on-chip that digitizes the signal
passed across the RNG1/2 pins and then sends this
signal digitally across the isolation link to the system-
side module. This mode is typically used to detect caller
ID data (see the “Caller ID” section). There are two low-
power ADCs on the Si3016. One is enabled by setting
the ONHM bit in Register 5. This ADC draws
approximately 450 µA of current from the line when
activated. A lower-power ADC also exists on the
Si3016, which enables a reduced current draw from the
line of approximately 7 µA. This lower power ADC is
enabled by setting the MODE bit (in conjunction with the
ONHM bit) to 1. (See the MODE bit description in the
“Control Registers” section.) Regardless of which ADC
is being used, the on-hook line monitor function must be
disabled before the device is taken off-hook. Thus,
ensure that the ONHM bit is cleared before setting the
OH bit.
The signal to the lower power ADC can be attenuated to
accommodate larger signals. This is accomplished
through the use of the ARX[2:0] bits. It is important to
note that while these ARX bits provide gain to the
normal receive path of the DAA, they also function as
attenuation bits for the on-hook line monitor low-power
ADC. Attenuation settings include 0, 1, 2.2, 3.5, and
5 dB. It is recommended that the new lower-power ADC
be used for on-hook line monitoring.
4.18. Caller ID
The Si3016 provides the designer with the ability to
pass caller ID data from the phone line to a caller ID
decoder connected to the serial port.
4.18.1. Type I Caller ID
Type I Caller ID sends the CID data while the phone is
on-hook.