參數(shù)資料
型號: 73M1903C-IM
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, QCC32
封裝: LEAD FREE, QFN-32
文件頁數(shù): 31/45頁
文件大?。?/td> 459K
代理商: 73M1903C-IM
73M1903C
Modem Analog Front End
DATA SHEET
Page: 37 of 45
2005 TERIDIAN Semiconductor Corporation
Rev 3.4
Next make the sum of R2 + R3 much higher than 600 . Make sure they are lower than the input
impedance of the RXAP/RXAN pins; otherwise they can move the frequency response of the input filter.
So let R2 + R3 = 100 K.
R3
100 K
1
Rwtot 600
1200
where
Rwtot RW Rohswitch
2 Rbead
.
R2 100 K R3
Use 1% resistors for R1, R2, and R3
To select the value for C1, make the zero at around 10Hz.
1
2
π
. 100
.
KC1
.
10
C1
1
2
π
. 100
.
K10
.
C1 0.15 uF
The blocking cap Cblock should also have the same frequency response, but due to the low impedance,
its value will be much higher, usually requiring a polarized cap. A blocking cap may also be needed on
the modem side of the transformer if the DC offset current of the transmit pins will exceed the current
rating of the transformer.
Cblock
1
2
π
. 600
.
10
.
Cblock 27 uF
When using a wet transformer design as in the following figure, the only difference is that the
TXAP1
RXAP
R1
R3
R1
R2
R3
R2
RW
C1
TXAN1
RING
DETECTOR
C1
Bead
Hook
Switch
TIP
RING
RXAN
blocking capacitor, Cblock, it is removed. All other equations still hold true.
相關(guān)PDF資料
PDF描述
73S1209F-44IM/F POWER SUPPLY MANAGEMENT CKT, QCC44
73S1209F-68IM/F POWER SUPPLY MANAGEMENT CKT, QCC68
73S1209F-68IMR/F POWER SUPPLY MANAGEMENT CKT, QCC68
73S1209F-44IMR/F POWER SUPPLY MANAGEMENT CKT, QCC44
73S1209F-68IMR/F POWER SUPPLY MANAGEMENT CKT, QCC68
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
73M1903C-IM/F 功能描述:電信線路管理 IC Modem Analog Front End 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
73M1903C-IM/F1 功能描述:電信線路管理 IC 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
73M1903C-IMR/F 功能描述:電信線路管理 IC Modem Analog Front End 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
73M1903C-IMR/F1 功能描述:電信線路管理 IC 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
73M1903-EVM-600 功能描述:網(wǎng)絡(luò)開發(fā)工具 73M1903 w/Ppu & 600 Ohm Term-Usa & Japan RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V