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參數(shù)資料
| 型號： | ST70134-ST70135A |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | ASCOT ADSL MODEM CHIP SET FOR CPE |
| 中文描述： | 阿斯科特ADSL調(diào)制解調(diào)器芯片組用于CPE |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 57K |
| 代理商： | ST70134-ST70135A |
ST70134 - ST70135A
3/8
ASCOT ICs
ASCOT
(ST70134) and a Discrete Multitone Modem
(ST70135A)
integrated
produced by STMicroelectronics.
Here below we will briefly go through the main
topics of both the ICs (see Figure 2 and Figure 3).
consists
of
an
Analog
Front
End
circuits
which
are
Analog Front End (ST70134)
HCMOS5A (0.5
μ
m) mixed digital and analog
technology has been chosen to produce this
component that embodies the analog functions of
the ASCOT.
Automatic gain control amplifiers, placed at the
analog interface of transmit and receive paths,
allow to keep acceptable level of the signal ADC’s
and DAC’s resolution, that is 12-bit wide with
8.8MHz sampling rate.
A
built-in
driver
allows
generation using a VCXO.
for
external
clock
ST70134 Analog Front End’s main features:
– Rx low noise amplifier (0-31dB in 1dB steps
– Tx pre-driver amplifier (-15dB -0)
– Two input ports allow selection of RX signals,
e.g. with or without external attenuation
– Programmable low pass and band pass filters
– 12-bit DAC and ADC, sampling at 8.832MHz
– Xtal: 35.328MHz,
±
50ppm, the accuracy of the
frequency is determined by the External XTAL
– Direct connection to ST70135A DMT modem
– Error correction on ADC output
– Analog and digital loop back modes
– Single 3.3V supply, or 3.3V analog and 3.0V
digital supplies
– Power dissipation 0.4W
– Power-down mode0.1W
– TQFP64 (10 x 10mm body, 0.5mm pitch)
Figure 2 :
Analog Front End block diagram
MUX
4
LPF
138KHz
G = -15...0dB
STEP 1dB
VCODAC
XTAL DRIVER
TRANSMIT-SIDE
MUX
RECEIVE-SIDE
4
DAC
DAC
12 Bits / 8.8MHz
12 Bits / 8.8MHz
LPF
1.1MHz
LNA
G = 0...31dB
STEP 1dB
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST70135 | ASCOTTM DMT TRANSCEIVER |
| ST70135A | ASCOTTM DMT TRANSCEIVER |
| ST70136 | CPE ADSL ANALOG FRONT END |
| ST70136B | CPE ADSL ANALOG FRONT END |
| ST70136G | CPE ADSL ANALOG FRONT END |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST70134TR | 功能描述:電信線路管理 IC ADSL DMT Transceiver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| ST70135 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:ASCOTTM DMT TRANSCEIVER |
| ST70135A | 制造商:STMicroelectronics 功能描述:Modem Chip Single 144-Pin PQFP |
| ST70136 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:CPE ADSL ANALOG FRONT END |
| ST70136B | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:CPE ADSL ANALOG FRONT END |
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