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參數(shù)資料
| 型號(hào)： | SI3019-F-FS |
| 廠商： | Silicon Laboratories Inc |
| 文件頁(yè)數(shù)： | 21/94頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC LINE-SIDE DAA 16SOIC |
| 標(biāo)準(zhǔn)包裝： | 48 |
| 系列： | ISOcap™ |
| 數(shù)據(jù)格式： | V.92 |
| 電源電壓： | 3 V ~ 3.6 V |
| 安裝類型： | 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 |
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Si3056
Si3018/19/10
28
Rev. 1.05
Figure 21. TBR21 Mode I/V Characteristics,
DCV[1:0] = 11, MINI[1:0] = 00, ILIM = 1
The MINI[1:0] bits select the minimum operational loop
current for the DAA, and the DCV[1:0] bits adjust the
DCT pin voltage, which affects the TIP/RING voltage of
the DAA. These bits permit important trade-offs for the
system designer. Increasing the TIP/RING voltage
provides more signal headroom, while decreasing the
TIP/RING voltage allows compliance to PTT standards
in low-voltage countries such as Japan. Increasing the
minimum operational loop current above 10 mA also
increases signal headroom and prevents degradation of
the signal level in low-voltage countries.
Finally,
Australia
has
separate
dc
termination
requirements for line seizure versus line hold. Japan
mode may be used to satisfy both requirements.
However, if a higher transmit level for modem operation
is desired, switch to FCC mode 500 ms after the initial
off-hook. This satisfies the Australian dc termination
requirements.
5.12. AC Termination
The Si3056 has four ac termination impedances with
the Si3018 line-side device and sixteen ac termination
impedances with the Si3019 line-side device. The ACT
and ACT2 bits select the ac impedance on the Si3018
line-side device. The ACIM[3:0] bits select the ac
impedance on the Si3019. The available ac termination
settings are listed for the line-side devices in Tables 17
and 18.
The most widely used ac terminations are available as
register
options to
satisfy
various global PTT
requirements. The real 600
impedance satisfies the
requirements of FCC part 68, JATE, and many other
countries. The 270
+ (750 || 150 nF) satisfies the
requirements of TBR21 (ACT = 0, ACT = 1, or ACIM
[3:0] = 0010).
45
40
35
30
25
20
15
10
5
.015 .02 .025 .03 .035 .04 .045 .05 .055 .06
Loop Current (A)
TBR21 DCT Mode
Voltage
Ac
ro
ss
DAA
(
V
)
Table 17. AC Termination Settings for the Si3010
and Si3018 Line-Side Devices
ACT ACT2
AC Termination
0
Real, nominal 600
termination that sat-
isfies the impedance requirements of
FCC part 68, JATE, and other countries.
1
0
Complex impedance that satisfies global
impedance requirements.
0
1
Complex impedance that satisfies global
impedance requirements EXCEPT New
Zealand. Achieves higher return loss for
countries requiring complex ac termina-
tion. [220
+ (820 || 120 nF) and
220
+ (820 || 115 nF)]
1
Complex impedance for use in New
Zealand. [370
+ (620 || 310 nF)]
Table 18. AC Termination Settings for the
Si3019 Line-Side Device
ACIM[3:0]
AC Termination
0000
600
0001
900
0010
270
+ (750 || 150 nF) and 275
+ (780
|| 150 nF)
0011
220
+ (820 || 120 nF) and
220
+ (820 || 115 nF)
0100
370
+ (620 || 310 nF)
0101
320
+ (1050 || 230 nF)
0110
370
+ (820 || 110 nF)
0111
275
+ (780 || 115 nF)
1000
120
+ (820 || 110 nF)
1001
350
+ (1000 || 210 nF)
1010
200
+ (680 || 100 nF)
1011
600
+ 2.16 F
1100
900
+ 1 F
1101
900
+ 2.16 F
1110
600
+ 1 F
1111
Global complex impedance
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