Substituting Equation 19 into Equation 17 (VIN =0) and defining
參數(shù)資料
型號(hào)： ISL5585FCRZ-TK
廠商： Intersil
文件頁(yè)數(shù)： 5/24頁(yè)
文件大?。?/td> 0K
描述： IC SLIC RINGING 3.3V VOB 32-QFN
標(biāo)準(zhǔn)包裝： 1,000
功能： 用戶線路接口概念（SLIC）
電路數(shù)： 1
電源電壓： 3.3V
功率（瓦特）： 305mW
工作溫度： 0°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 32-VQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 32-QFN（7x7）
包裝： 帶卷 (TR)
包括： 均衡和不均衡振鈴，振鈴聲信號(hào)發(fā)生器，熱關(guān)機(jī)，帶警報(bào)指示器
13
Substituting Equation 19 into Equation 17 (VIN =0) and
defining
IM = -V2W/ZL results in Equation 37 for VTX.
Combining Equations 36 and 37 results in Equation 38.
A more useful form of the equation is rewritten in terms of
VTX/V2W. A voltage divider equation is written to convert
from EG to V2W as shown in Equation 39.
Substituting ZL = ZO + 2RP and rearranging Equation 39 in
terms of EG results in Equation 40.
Substituting Equation 40 into Equation 38 results in an
equation for 2-wire to 4-wire gain that’s a function of the
synthesized input impedance of the SLIC and the protection
resistors.
If ZL is set to 600, ZO is programmed with RS to be
498.76
(66.5k/133.33), and R
P is equal to 49.9. This
results in a 2-wire to 4-wire gain of 0.416 or -7.6dB.
When the protection resistors are set to zero, the transmit
gain is -6dB.
Transhybrid Gain
The transhybrid gain is defined as the 4-wire to 4-wire gain
(G44).
Understanding Phase Across the ISL5585
4-Wire to 2-Wire Phase
The phase of a signal through the ISL5585 is dependent
upon whether the source is driving the signal 4-wire to 2-wire
or 2-wire to 4-wire.
Figure 6 illustrates the phase of the input signal across the
ISL5585 when the signal is applied at the -IN pin of the
ISL5585 through the RIN resistor. The Transmit Amplifier
(TA) inverts the signal 180 degrees at the VTX pin. The
feedback around the tip amplifier inverts the signal again on
the tip lead. The input signal will cause AC loop current to
flow through the 20
sense resistors in the direction from
V 1 to V2 and V3 to V4. This results in an inverted signal
(referenced from tip) on the VSA and thus the VFB pin. This
out of phase signal is the signal used by the feedback path to
match the line impedance of the 2-wire side.
2-Wire to 4-Wire Phase
Figure 7 Illustrates the phase of the input signal across the
ISL5585 when the signal is applied across tip and ring.
When you’re driving the 2-wire side with a source the
ISL5585 looks like a predetermined impedance
(programmed with resistor RS). The current flows through
the 20
sense resistors in the direction V2 to V1 and V4 to
V3. This results in a non-inverted signal (referenced from tip)
on the VSA and thus the VFB pin. This signal is then
inverted by the TA amplifier and the signal appearing on the
VTX putput is out of phase with the signal on tip.
Summary of the Phase Through the ISL5585
4-Wire to 2-Wire (VIN to V2W) is 180° out of phase
2-Wire to 4-Wire (V2w to VTX) is 180° out of phase
4-Wire to 4-Wire (VIN to VTX) is 180° out of phase
V
TX
V
2W
2
------------
Z
L
2R
P
–
Z
L
------------------------
=
(EQ. 37)
G
2-4 =
V
TX
E
G
---------- =
Z
L
2R
P
–
2Z
L
2R
P
Z
O
++
()
------------------------------------------------
–
Z
O
2Z
L
2R
P
Z
O
++
()
------------------------------------------------
–
=
(EQ. 38)
V
2W =
Z
O + 2RP
Z
L
Z
O
+
+ 2
RP
----------------------------------------
E
G
(EQ. 39)
E
G = 2V2W
(EQ. 40)
G
2-4 =
V
TX
V
2W
------------ =
Z
O
Z
L
2R
P
Z
O
++
()
--------------------------------------------
–
0.416
=
(EQ. 41)
G
44
G
42
G
×
24
R
S
R
IN
----------
–
Z
O
Z
L
2R
P
Z
O
++
---------------------------------------
==
(EQ. 42)
ISL5585
相關(guān)PDF資料
PDF描述
IDT82P2821BHG IC LINE INTERFACE UNIT 640-PBGA
SI3062-F-FS IC DAA ENH FCC LINE-SIDE 16SOIC
VE-26N-IX-S CONVERTER MOD DC/DC 18.5V 75W
S9S08SG32E1WTLR IC MCU 8BIT 32KB FLASH 28TSSOP
VE-26L-IX-S CONVERTER MOD DC/DC 28V 75W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISL5585GCM 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述:
ISL5585GCMZ 制造商:Intersil Corporation 功能描述:SLIC 1CH 53DB 45MA 3.3V/-18V/-24V/-28V 28PLCC - Rail/Tube 制造商:Intersil 功能描述:RINGING W/3 3V VCC 100V/53DB
ISL5585GCMZ-T 制造商:Intersil Corporation 功能描述:SLIC 1CH 53DB 45MA 3.3V/-18V/-24V/-28V 28PLCC - Tape and Reel 制造商:Intersil 功能描述:RINGING SLIC W/3 3V VCC 100V/53DB
ISL5585GCR 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:3.3V Ringing SLIC Family for Voice Over Broadband (VOB)
ISL5585GCR-TK 功能描述:IC SLIC RINGING 3.3V VOB 32-QFN RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:*
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*