參數(shù)資料
型號(hào): SI3232DCX-EVB
廠商: Silicon Laboratories Inc
文件頁(yè)數(shù): 68/128頁(yè)
文件大?。?/td> 0K
描述: DAUGHTER CARD W/DISCRETE INTRFC
標(biāo)準(zhǔn)包裝: 1
系列: ProSLIC®
主要目的: 接口,模擬前端(AFE)
已用 IC / 零件: Si3232
已供物品: 板,CD
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)當(dāng)前第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)
Si3232
44
Preliminary Rev. 0.96
Not
Recommended
fo
r N
ew
D
esi
gn
s
4.12. Relay Driver Considerations
The Si3232 includes a general-purpose driver output for
each channel (GPOa, GPOb) to drive external test
relays. In most applications, the relay can be driven
directly from the Si3232 with no external relay drive
circuitry required. Figure 21 illustrates the internal relay
driver circuitry using a 3 V relay.
Figure 21. Si3232 Internal Relay Drive Circuitry
The internal driver logic and drive circuitry is powered
from the same 3.3 V supply as the chip’s main supply
(VDD1–VDD4 pins). When operating external relays
from a VCC supply that is equal to the chip’s VDD supply,
an internal diode network provides protection against
overvoltage conditions caused by flyback spikes when
the relay is opened. Only 3 V relays may be used in the
configuration shown in Figure 21, and either polarized
or non-polarized relays are acceptable provided both
VCC and VDD are powered by a 3.3 V supply. The input
impedance, RIN, of the relay driver pins is a constant
11
while sinking less than the maximum rated 85 mA
into the pin.
If the desired operating voltage of the relay, VCC, is
higher than the Si3232’s VDD supply voltage, an
external drive circuit is required to eliminate leakage
from VCC to VDD through the internal protection diode.
In this configuration, a polarized relay is recommended
to provide optimal overvoltage protection with minimal
external components. Figure 22 illustrates the required
external
drive
circuit,
and
provides
recommended
values
for
RDRV for typical relay
characteristics
and
VCC
supplies.
The
output
impedance, ROUT, of the relay driver pins is a constant
63
while sourcing less than the maximum rated
28 mA out of the pin.
Figure 22. Driving Relays with VCC > VDD
The maximum allowable RDRV value can be calculated
using the following equation:
where
Q1,MIN ~ 30 for a 2N2222
Si3232
Relay
Driver
Logic
V
DD
GND
GPOa/b
V
CC
3 V/5 V Relay
(polarized or
non-polarized)
Table 26. Recommended RDRV Values
ProSLIC
VDD
Relay
VCC
Relay
RCOIL
Maximum
RDRV
Recom-
mended
5% Value
3.3 V
±5%
3.3 V
±5%
64
Not
Required
3.3 V
±5%
5V
±5%
178
2718
2.7 k
3.3 V
±5%
12 V
±10%
1028
6037
5.6 k
3.3 V
±5%
24 V
±10%
2880
8364
8.2 k
3.3 V
±5%
48 V
±10%
7680
11092
11 k
Si3232
V
DD
GPOa
GPOb
V
CC
Polarized
relay
R
DRV
I
DRV
Q1
MaxR
DRV
V
DD,MIN
0.6 V
R
RELAY
Q1,MIN
V
CC,MAX
0.3 V
-------------------------------------------------------------------------------------------------
R
SOURCE
=
相關(guān)PDF資料
PDF描述
M1AXK-3440K IDC CABLE - MSC34K/MC34F/X
SI3232PPT0-EVB BOARD EVAL W/SI3200 INTERFACE
UPZW6101MHD CAP ALUM 100UF 420V 20% RADIAL
SI3232DC0-EVB DAUGHTER CARD W/SI3200 INTERFACE
UPZ2D391MHD CAP ALUM 390UF 200V 20% RADIAL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SI3232-FQ 功能描述:電信線路管理 IC DUAL CH SLIC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
SI3232-FQR 制造商:Silicon Laboratories Inc 功能描述:
SI3232-G-FQ 功能描述:電信線路管理 IC Dual-Channel SLIC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
SI3232-G-FQR 功能描述:電信線路管理 IC Dual-CH SLIC only Internal 65 Vrms RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
SI3232-G-GQ 功能描述:電信線路管理 IC Dual-Channel SLIC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray