參數(shù)資料
型號(hào)： SI3225PPT0-EVB
廠商： Silicon Laboratories Inc
文件頁(yè)數(shù)： 42/112頁(yè)
文件大?。?/td> 0K
描述： BOARD EVAL W/SI3200 INTERFACE
標(biāo)準(zhǔn)包裝： 1
系列： ProSLIC®
類型： ADC + DAC，編碼解碼器，前端
適用于相關(guān)產(chǎn)品： Si3225
所含物品： 評(píng)估板和光盤
Si3220/25 Si3200/02
Rev. 1.3
35
Not
Recommended
fo
r N
ew
D
esi
gn
s
Figure 16. Adaptive Linefeed V/I Behavior
When the Si3220/Si3225 is used with the Si3200/2
linefeed device, the source impedance of the dc feed is
640
before the adaptive linefeed transition and 320
after the adaptive linefeed transition, as shown in
Figure 16. On the other hand, when the Si3220/Si3225
is used with a discrete bipolar transistor linefeed, the
source impedance of the dc feed is 320
both before
and after the adaptive linefeed transition.
The loop closure thresholds are programmable via the
LCROFFHK and LCRONHK RAM addresses. The
LCRLPF
RAM
address
provides
filtering
of
the
measured loop current, and the LCRDBI RAM address
provides de-bouncing. The LCR status bit in register
LCRRTP indicates when a loop closure event has been
page 45 for additional details.
3.4.2. On-Hook to Off-Hook Transition
Referring to Figure 16, point 1 represents the open-
circuit voltage (VOC = –48 V) of the dc feed. At point 1,
the source impedance of the dc feed is 640
(320 for
discrete
bipolar
transistor
linefeed)
and
VTIP/
RING = VOC, since no current flows in the loop. When
a dc load is connected across TIP and RING and as dc
current begins to flow in the dc loop, the product of the
dc loop current and the 640
source impedance
(320
for a discrete bipolar transistor linefeed) causes
the
VTIP/RING
voltage
to
decline
linearly
with
increasing loop current. When the VTIP/RING voltage
reaches the VOCLTH threshold (point 2), adaptive
linefeed switches the source impedance of the dc feed
to 320
and simultaneously boosts the value of VOC
by VOCDELTA (point 3). The source impedance of the
dc feed will now remain at 320
until the programmed
current limit (ILIM) is reached (point 4). At point 4, the dc
feed has entered into the constant current mode of
operation.
Adaptive linefeed can be disabled by writing a value of
zero into the VOCDELTA RAM address. Writing a value
of zero to VOCDELTA simply eliminates the apparent
VOC
voltage
boost
associated
with
a
non-zero
VOCDELTA value. With VOCDELTA = 0 in the case of
the Si3200/2, the adaptive linefeed transition still
changes the source impedance from 640
to 320 ,
and there is a corresponding discontinuity at the
0
10
20
30
40
50
60
70
0.005
0.01
0.015
0.02
0.025
Iloop (A)
Vt
ip/
ri
n
g
(
V
)
320 Ohms
VOCHTH
VOCLTH
VOCDELTA
1
6
2
3
5
4
10 kOhms
2450 Ohms
1930 Ohms
1800 Ohms
相關(guān)PDF資料
PDF描述
MCP120-315GI/TO IC SUPERVISOR ACTIVE LOW TO-92
MAX6439UTFJYD3+T IC BATTERY MON SNGL SOT23-6
LHL13TB221K INDUCTOR 220UH 1.3A RADIAL
1838240-1 CONN MALE M12 3POS STR 2M CABLE
MCP120-300HI/TO IC SUPERVISOR ACTIVE LOW TO-92
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SI3225PPT-EVB 制造商:SILABS 制造商全稱:SILABS 功能描述:EVALUATION BOARD FOR THE Si3225 DUAL PROSLIC
SI3225PPTX-EVB 功能描述:音頻 IC 開發(fā)工具 Si3225 Eval Board RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
SI3225-X-FQ 制造商:SILABS 制造商全稱:SILABS 功能描述:DUAL PROSLIC㈢ PROGRAMMABLE CMOS SLIC/CODEC
SI3225-X-GQ 制造商:SILABS 制造商全稱:SILABS 功能描述:DUAL PROSLIC㈢ PROGRAMMABLE CMOS SLIC/CODEC
SI3226 制造商:SILABS 制造商全稱:SILABS 功能描述:Dual ProSLIC㈢ with DC-DC Controller
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

*
*
*