參數(shù)資料
型號： 73M1866B-KEYCHN
廠商： Maxim Integrated Products
文件頁數(shù)： 44/88頁
文件大?。?/td> 0K
描述： BOARD KEYCHAIN INF DANUBE EVM
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
DS_1x66B_001
73M1866B/73M1966B Data Sheet
Rev. 1.6
49
8.6
Transmit Path Signal Processing
8.6.1
General Description
In the transmit path, data is first sent by the host DSP through a serial interface to the 73M1x66B then
interpolated by an interpolation filter, serialized and transmitted across barrier interface to the Line-Side
Device, which is floating relative to the Host-Side Device earth ground. The data received on the
Line-Side Device is then de-serialized and digitally sigma-delta modulated to a one-bit data stream of
1.536 Mbps for a sample frequency of 8 kHz or 3.072 Mbps for a sample frequency of 16 kHz. The signal
is further filtered first by a switched capacitor filter and then a continuous time anti-aliasing circuit.
The 0.2 dB pass-band ripple frequency is from dc to 3.422 kHz for an 8 kHz sample rate or 6.844 kHz
for a 16 kHz sample rate.
The 3 dB bandwidth is 3.65 kHz for an 8 kHz sample rate or 7.299 kHz for a 16 kHz sample rate.
8.6.2
Total Transmit Path Response
Figure 26 and Figure 27 show the transmit path frequency response. The response shape is the same,
but the frequencies double for a 16 kHz sample rate.
0
1
2
3
4
5
6
7
8
100
90
80
70
60
50
40
30
20
10
0
10
Transmit Path Overall Frequency Response
Freq(kHz)
G
ai
n(dB)
10
100
comp osite x
( )
8
0
x 16
com
iplo
xou
Figure 26: Transmit Path Overall Frequency Response to Fs of 8 kHz
0
0.5
1
1.5
2
2.5
3
3.5
4
1
0.8
0.6
0.4
0.2
0
0.2
0.4
0.6
0.8
1
Transmit Passband Response
Freq(kHz)
G
ai
n(dB)
1.
1.0
comp osite x
( )
4
0
x 16
Figure 27: Transmit Path Passband Response for an 8 kHz Sample Rate
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