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参数资料
| 型号： | AD9767-EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 25/44页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD9767 |
| 产品培训模块： | DAC Architectures |
| 标准包装： | 1 |
| 系列： | TxDAC+® |
| DAC 的数量： | 2 |
| 位数： | 14 |
| 采样率（每秒）： | 125M |
| 数据接口： | 并联 |
| 设置时间： | 35ns |
| DAC 型： | 电流 |
| 工作温度： | -40°C ~ 85°C |
| 已供物品： | 板 |
| 已用 IC / 零件： | AD9767 |
| 相关产品： | AD9767ASTZRL-ND - IC DAC 14BIT DUAL 125MSPS 48LQFP AD9767ASTZ-ND - IC DAC 14BIT DUAL 125MSPS 48LQFP |
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Data Sheet
AD9763/AD9765/AD9767
Rev. G | Page 31 of 44
APPLICATIONS INFORMATION
VDSL EXAMPLE APPLICATIONS USING THE
AD9765 AND AD9767
Very high frequency digital subscriber line (VDSL) technology is
growing rapidly in applications requiring data transfer over
relatively short distances. By using quadrature amplitude
modulation (QAM) and transmitting the data in discrete multiple
tones (DMT), high data rates can be achieved.
As with other multitone applications, each VDSL tone is
capable of transmitting a given number of bits, depending on
the signal-to-noise ratio (SNR) in a narrow band around that
tone. For a typical VDSL application, the tones are evenly
spaced over the range of several kHz to 10 MHz. At the high
frequency end of this range, performance is generally limited by
cable characteristics and environmental factors such as external
interferers. Performance at the lower frequencies is much more
dependent on the performance of the components in the signal
chain. In addition to in-band noise, intermodulation from other
tones can also potentially interfere with the data recovery for
represent a 500-tone missing bin test vector, with frequencies
evenly spaced from 400 Hz to 10 MHz. This test is very
commonly done to determine if distortion limits the number of
bits that can be transmitted in a tone. The test vector has a
series of missing tones around 750 kHz, which is represented in
Figure 79, and a series of missing tones around 5 MHz, which is
represented in Figure 81. In both cases, the spurious-free
dynamic range (SFDR) between the transmitted tones and the
empty bins is greater than 60 dB.
–20
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
0.665
0.825
0.805
0.785
0.765
0.745
0.725
0.705
0.685
(d
B
m
)
FREQUENCY (MHz)
00
61
7-
07
9
Figure 79. AD9765 Notch in Missing Bin at 750 kHz Is Down >60 dB
(Peak Amplitude = 0 dBm)
–20
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
0.665
0.825
0.805
0.785
0.765
0.745
0.725
0.705
0.685
(d
B
m
)
FREQUENCY (MHz)
00
61
7-
08
0
Figure 80. AD9767 Notch in Missing Bin at 750 kHz Is Down >60 dB
(Peak Amplitude = 0 dBm)
–30
–120
–110
–100
–90
–80
–70
–60
–50
–40
4.85
4.90
4.95
5.00
5.05
5.10
5.15
(d
B
m
)
FREQUENCY (MHz)
00
61
7-
08
1
Figure 81. AD9765 Notch in Missing Bin at 5 MHz Is Down >60 dB
(Peak Amplitude = 0 dBm)
–20
–120
–100
–80
–60
–40
4.85
4.90
4.95
5.00
5.05
5.10
5.15
(d
B
m
)
FREQUENCY (MHz)
00
61
7-
08
2
Figure 82. AD9767 Notch in Missing Bin at 5 MHz Is Down >60 dB
(Peak Amplitude = 0 dBm)
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相关代理商/技术参数 |
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|---|---|
| AD9768 | 制造商:AD 制造商全称:Analog Devices 功能描述:Ultrahigh Speed IC D/A Converter |
| AD9768JD | 制造商:Rochester Electronics LLC 功能描述:AD9768 IC - Bulk |
| AD9768JQ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD9768SD | 制造商:AD 制造商全称:Analog Devices 功能描述:Ultrahigh Speed IC D/A Converter |
| AD9768SE | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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