参数资料
| 型号： | AD9767ASTZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 25/44页 |
| 文件大小： | 0K |
| 描述： | IC DAC 14BIT DUAL 125MSPS 48LQFP |
| 产品培训模块： | DAC Architectures |
| 标准包装： | 1 |
| 系列： | TxDAC+® |
| 设置时间： | 35ns |
| 位数： | 14 |
| 数据接口： | 并联 |
| 转换器数目： | 2 |
| 电压电源： | 模拟和数字 |
| 功率耗散（最大）： | 450mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 托盘 |
| 输出数目和类型： | 4 电流，单极；4 电流，双极 |
| 采样率（每秒）： | 125M |
| 产品目录页面： | 785 (CN2011-ZH PDF) |
| 配用： | AD9767-EBZ-ND - BOARD EVAL FOR AD9767 |
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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 |
参数描述 |
|---|---|
| AD9767ASTZ | 制造商:Analog Devices 功能描述:D/A CONVERTER (D-A) IC ((NW)) |
| AD9767ASTZAIRBUS | 制造商:Analog Devices 功能描述: |
| AD9767ASTZKL1 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD9767ASTZRL | 功能描述:IC DAC 14BIT DUAL 125MSPS 48LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:TxDAC+® 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散（最大）:100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC（J 形引线） 供应商设备封装:28-PLCC（11.51x11.51） 包装:带卷 (TR) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:143k |
| AD9767-EB | 制造商:Analog Devices 功能描述: |
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