參數(shù)資料
型號(hào)： SI3016-F-FS
廠(chǎng)商： Silicon Laboratories Inc
文件頁(yè)數(shù)： 13/50頁(yè)
文件大小： 0K
描述： IC LINE-SIDE DAA 16SOIC
標(biāo)準(zhǔn)包裝： 48
數(shù)據(jù)格式： V.90
電源電壓： 3.3V，5V
安裝類(lèi)型： 表面貼裝
封裝/外殼： 16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SOIC N
包裝： 管件
Si3016
20
Rev. 1.0
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.
Figure 14. Billing Tone Filter
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 A 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 A. 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.
Table 11. Component Values—Optional Billing
Tone Filters
Symbol
Value
C1,C2
0.027 F, 50 V, ±10%
C3
0.01 F, 250 V, ±10%
L1
3.3 mH, >120 mA, <10
Ω, ±10%
L2
10 mH, >40 mA, <10
Ω, ±10%
L2
C3
RIN G
TIP
From Line
To
DAA
C1
C2
L1
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