AMIS-49250-XTD ON Semiconductor, AMIS-49250-XTD Datasheet - Page 16

• Manufacturer Part Number: AMIS-49250-XTD
• Description: IC TXRX FIELDBUS MAU 44-NQFP
• Manufacturer: ON Semiconductor
• Type: Transceiverr

Specifications of AMIS-49250-XTD

• Number Of Drivers/receivers: 1/1
• Protocol: MDS-MAU
• Voltage - Supply: 4.75 V ~ 6.2 V
• Mounting Type: Surface Mount
• Package / Case: 44-LQFP
• Logic Type: Fieldbus Media Access Unit
• Logic Family: AMIS-492x0
• Number Of Channels Per Chip: 1
• Input Level: CMOS
• Output Level: CMOS
• Output Type: Open Drain
• High Level Output Current: 50 uA
• Low Level Output Current: 50 uA
• Supply Voltage (max): 6.2 V
• Supply Voltage (min): 3 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Polarity: Inverting/Non-Inverting
• Number Of Transmitters: 1
• Power Supply Requirement: Dual
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AMIS-49250-XTDOS

AMIS-492x0
4.4 Receive Block
The receive block contains three sub-blocks, which are internally connected:
4.4.1. Band Pass Filter
The band pass filter is a series connection of a high-pass and a low-pass filters each having two poles. Each filter is comprised of a
voltage follower and on chip resisters, so only four external capacitors are necessary. The following figure shows an internal circuit and
the connection of external capacitors. Cut-off frequency, f
of the low-pass filter is determined by C
The possible ranges of f
recommended to obtain 1kHz and 47.6kHz cut-off frequencies.
1.
2.
3.
A band pass filter – to filter the desired incoming communication signal.
Carrier detector – generates the RxA signal by detecting the signal amplitude.
Zero-cross detector generates the RxS signal by detecting the high/low transitions of the Manchester code.
L
and f
H
are 1kHz ~ 10kHz and 10kHz ~ 100kHz, respectively. The values in the following figure are
f
3
H
f
and C
L
=
=
2
1
π
2
1
π
4
.
R
F
R
Rev. 6 | Page 16 of 22 | www.onsemi.com
3
1 F
*
R
*
Figure 10: Current Control Circuit
R
F
1
4
F
*
1
2
C
*
C
3
L
*
1
, of the high-pass filter is determined by C
C
*
C
4
2
Q =
Q =
L
L
. 0
1
44
2
*
R
R
F
1 F
2
C
C
3
4
=0.95
=0.95
1
and C
2
while cut-off frequency, f
H
,