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| 型号： | 73M1906B-IVT/F |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 46/88页 |
| 文件大小： | 0K |
| 描述： | MICRODAA SET FXO OF VOIP 20TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 74 |
| 系列： | * |
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73M1866B/73M1966B Data Sheet
DS_1x66B_001
50
Rev. 1.6
8.6.3
73M1x66B Transmit Spectrum
Figure 28 shows the transmit spectrum observed on the line from dc to 32 kHz for a sample frequency
(Fs) of 8 kHz. The transmit signal is band-limited (by default) to Fs/2=4 kHz and is flat (with 0.2 dB ripple)
to 3.65 kHz and is marked as Txdb(x) in the figure. All frequencies double for a 16 kHz sample rate
Also shown, and marked as signaldb(x), is the baseband signal from 1 kHz to 2 kHz for an 8 kHz sample
rate (2 kHz to 4 for a 16 kHz sample rate). The aliases of signaldb(x) are shown as aliasdb(x) and are
attenuated significantly with better than 80 dB attenuation at 8 kHz, better than 60 dB at 16 kHz, better
than 100 dB at 24 kHz, etc for an 8 kHz sample rate and the frequencies double for a 16 kHz sample rate.
0
4
8
12
16
20
24
28
32
140
120
100
80
60
40
20
0
20
Transmit Spectrum
Freq
S
pe
ct
rum
(dB)
20
140
signaldb x
( )
aliasdb x
( )
Txdb x
( )
32
0
16x
Figure 28: Transmit Spectrum to 32 kHz for an 8 kHz Sample Rate
8.7
Receive Path Signal Processing
8.7.1
General Description
In the receive path, the signal from the telephone line is input to the anti-aliasing filter and passed through
a selectable low pass (notch) filter, which can be used to attenuate in-band Billing Tones. The analog
signal is digitized by a sigma-delta analog to digital converter. The resulting high frequency one-bit data
stream is decimated and sent to the Host-Side Device via the barrier. Another decimation FIR filter in the
Host-Side Device filters the received data and sends it to the host DSP for processing.
The response of the receive path, in conjunction with the decimation filter in the Host-Side Device,
provides a flat pass-band response to 3.342 kHz at an 8 kHz sample rate or 6.744 kHz with a 16 kHz
sample rate with 0.2 dB ripple. The 3 dB bandwidth is 3.58 kHz at 8kHz sample rate or 7.226 kHz at a
16 kHz sample rate. . The one-bit data stream is 1.536 Mbps for an 8 kHz sample rate or 3.072 Mbps
with a 16 kHz sample rate.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 73M1906B-IVTR/F | 功能描述:电信线路管理 IC DAA-FXO VOLP System Host Side RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M1906-IVT/F | 制造商:TERIDIAN 功能描述: |
| 73M1912-IM/F | 功能描述:电信线路管理 IC MicroDAA Chip Set Line Side RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M1912-IMR/F | 功能描述:电信线路管理 IC MicroDAA Chip Set Line Side RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M1912-IVT/F | 功能描述:电信线路管理 IC MicroDAA Chip Set Line Side RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
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