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參數(shù)資料
| 型號(hào)： | AMIS49587GEVK |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 17/55頁 |
| 文件大小： | 0K |
| 描述： | KIT EVALUATION AMIS49587 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 主要目的： | 接口，電源線路收發(fā)器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AMIS49587 |
| 已供物品： | 2 個(gè)板，線纜，CD，文檔 |
| 其它名稱： | AMIS49587GEVKOS |
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AMIS49587
http://onsemi.com
24
output level is fixed to the programmed level in the register
R_ALC_CTRL[2:0].
See
also
paragraph.
WriteConfigRequest.
Table 25. FIXED TRANSMITTER OUTPUT
ATTENUATION
ALC_CTRL[2:0]
Attenuation
000
0 dB
001
3 dB
010
6 dB
011
9 dB
100
12 dB
101
15 dB
110
18 dB
111
21 dB
Remark: The analog part of AMIS49587 works with an
analogue
ground
REF_OUT.
When
connecting
AMIS49587 to external circuitry working with another
ground one must make sure to place a decoupling capacitor.
6.3
RECEIVER PATH DESCRIPTION
6.3.1 Receiver Block Diagram
The receiver takes in the analog signal from the line
coupler, conditions it and demodulates it in a datastream to
the communication controller. The operation mode and the
baud rate are made according to the setting in R_CONF,
R_FS and R_FM. The receive signal is applied first to a high
pass filter. Therefore AMIS49587 has a low noise
operational amplifier at the input stage which can be used to
make a high pass active filter to attenuate the mains
frequency. This high pass filter output is followed by a gain
stage which is used in an automatic gain control loop. This
block also performs a single ended input to differential
output conversion. This gain stage is followed by a
continuous time low pass filter to limit the bandwidth. A 4th
order sigma delta converter converts the analog signal to
digital samples. A quadrature demodulation for fS and fM is
than performed by the ARM micro, as well the handling of
the bits and the frames.
RX_OUT
RX_IN
REF_OUT
LOW NOISE
OPAMP
REF
1.65 V
TO
DIGITAL
Receiver (Analog Path)
Gain
LPF
FROM
DIGITAL
Figure 19. Analog Path of the Receiver
4th
Order
SD AD
Figure 20. Digital Path of the Receiver ADC and Quadrature Demodulation
Abs
value
accu
Receiver (Digital Path)
1
st
Decimator
Noise
Shaper
Compen
sator
AGC
Control
FROM
ANALOG
TO
GAIN
fSI
fMQ
fSQ
Sliding
Filter
Sliding
Filter
Sliding
Filter
Sliding
Filter
Quadrature Demodulator
fS
fM
2nd
Decimator
2nd
Decimator
2nd
Decimator
2nd
Decimator
SOFTWARE
IM
QM
IS
QS
fMI
FROM TRANSMITTER
fMQ fSI fSQ
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