參數(shù)資料
型號: AMIS-49200-XTP
廠商: ON Semiconductor
文件頁數(shù): 9/22頁
文件大小: 0K
描述: IC TXRX FIELDBUS MAU 44LQFP
標(biāo)準(zhǔn)包裝: 1,500
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 1/1
規(guī)程: MDS-MAU
電源電壓: 4.75 V ~ 6.2 V
安裝類型: 表面貼裝
封裝/外殼: 44-LQFP
供應(yīng)商設(shè)備封裝: 44-LQFP(10x10)
包裝: 帶卷 (TR)
AMIS-492x0
SIGIN
RF2
270K
RF1
75K
RF3
20K
RF4
54K
HPF
Vmid
1000pf
FLTOUT
FLT
Bandpass Filter
28
27
29
31
30
VCC
A2
VCC
A1
C3=220pf
To
Detectors
1000pf
C1
C2
C4=47pf
Signal
Input
Figure 11: Band Pass Filter
4.4.2. Receive Signal Detection
The carrier detector generates the receive activity (RxA) signal by detecting the input signal amplitude. Minimum amplitude is 100mVp-
p (TYP). A delay, determined by the capacitor connected between the CCD pin and GND, is added to avoid detection of transient
noise. The recommended value of CCD is 100pF. The output can drive a CMOS input of VDD supply voltage.
The zero-cross detector generates the receive signal (RxS) with minimum phase error (jitter) by detecting the transition between high
and low levels of the incoming Manchester code. Hysteresis of +40mV (TYP) is applied to avoid unnecessary switching by noise.
Once the carrier-detect goes active the hysteresis is removed and the switching point threshold is set to Vmid. The output can drive a
CMOS input of VDD supply voltage.
32
34
35
Zero-Cross Detector
Carrier Detector
Vtrip = Vmid
Vhyst = + 40mV
VHi50 = Vmid + 50mV
VLo50 = Vmid - 50mV
RXS
CCD
RXA
VCC
C2
VCC
C1
R
(1Meg)
C
(60pF)
Vmid
VCC
C2
VHi50
VLo50
RxSig
ZC Tript Pt
CD_Output
Level
Convert
VCC
VDD
Level
Convert
VDD
Filtered received signal
from Bandpass Filter
Figure 12: Receive Signal Detectors
Rev. 6 | Page 17 of 22 | www.onsemi.com
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