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参数资料
| 型号： | HI5741-EVS |
| 厂商： | Intersil |
| 文件页数： | 4/13页 |
| 文件大小： | 0K |
| 描述： | EVALUATION PLATFORM HI5741 |
| 标准包装： | 1 |
| DAC 的数量： | 1 |
| 位数： | 14 |
| 采样率（每秒）： | 100M |
| 数据接口： | 并联 |
| 设置时间： | 20ns |
| DAC 型： | 电流 |
| 工作温度： | -40°C ~ 85°C |
| 已供物品： | 板 |
| 已用 IC / 零件： | HI5741 |
Application Note 9626
The fundamental of a pure 1MHz tone should appear as an
impulse in the frequency domain at 1MHz. In a sampled
R SET (17)
100 ?
909 ?
FIGURE 7B. FULL SCALE OUTPUT APPLICATION CIRCUIT
system noise terms are produced near the sampling
frequencies called aliases. These aliases are related to the
fundamental in that they are located at ± f N around the
sampling frequency as shown in Figure 9.
0
FUNDAMENTAL
(PURE TONE)
AMPLITUDE
HI5741 board reconstructs the incoming digital data to an
analog representation that can be analyzed on a spectrum
analyzer or oscilloscope.
Plugging In
(dB)
-50
-85
NOISE FLOOR
After setting-up the HSP45116 board and the HI5741 board;
power should be applied to the banana jacks. A +5V, and a
-5.2V supply will be needed. To reduce noise the power
supply leads should be twisted pairs.
Connect the interface cable to an IBM PC or compatible’s
1MHz
f N
FIGURE 8. FREQUENCY PLOT OF 1MHz TONE
f
parallel port. Power should be applied to the board and then
run the software directly from ?oppy disk. To run the software
0
FUNDAMENTAL
SAMPLING FUNCTION
place the ?oppy disk into drive A: and type:
A: NCOMCTRL
the HSP45116 Control Panel will be loaded. To exercise the
board the following parameters should be set:
BINFMT = 0
AMPLITUDE
(dB)
-50
-85
ALIAS
(f S - 1MHz)
(SIN X)/X
and then set the Center Frequency to:
1MHz
f N
4MHz
f S
f
CENTER FREQUENCY = 01000000 HEX
where the center frequency is in hex. At this point the output
of the HI5741 DAC module should be converting a sine wave
at 48kHz. Connect the output of the HI5741 module to an
oscilloscope.
DDS Interface
The HSP45116 board is a TTL/CMOS compatible logic
board. The HI5741 is a TTL/CMOS compatible logic D/A
converter. The design of the DAC module is to interface to
the 14 Most Signi?cant Bits of the NCO. The HI5741 module
should be plugged into P2 of the HSP-EVAL board.
Spurious Free Dynamic Range
The Spurious Free Dynamic Range of the HI5741 DAC is the
most important speci?cation for communication applications.
This speci?cation shows how Integral Linearity, Glitch, and
Switching noise affect the spectral purity of the output signal.
Several important things must be noted ?rst.
When a quantized signal is reconstructed, certain artifacts
are created. Let’s take the example of trying to recreate a
1MHz sine wave with a 1V P-P output. In the frequency
domain the fundamental should appear at 1MHz as shown in
Figure 8.
3-4
FIGURE 9. SAMPLING ALIAS PRODUCTS
So for a 1MHz fundamental and a 5MHz sampling rate an
alias term is created at 4MHz and 6MHz. A (SIN)/X function
shaping is also induced by sampling a signal. Aliases
continue up through the frequency spectrum repeating around
the sampling frequency and its harmonics (i.e., 2f S , 3f S , 4f S ).
Also, when dealing with devices that posses high degrees of
dynamic range such as the HI5741, one must contend with
some fundamental limitations of the measurement system
being used. Since the HI5741 typically meets (and in some
cases exceeds) the dynamic range of the spectrum analyzer
used to evaluate the device, the use of a notch filter can greatly
alleviate the burden being placed on the equipment. By filtering
out the fundamental, and in the process eliminating a large
percentage of the power as seen by the spectrum analyzer, one
can bring to bear the full dynamic range of the equipment,
therefore truly evaluating the dynamic range of the DAC. Refer
to Application Note AN9619 “Optimizing Setup Conditions for
High Accuracy Measurements of the HI5741” for further details
on the use of filtering for evaluation purposes.
A reconstructed sine wave out of the HI5741 is not ideal and
as such has harmonics of the fundamental. The difference
between the magnitude of the fundamental and the highest
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HI5746 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:10-Bit, 40 MSPS A/D Converter |
| HI5746_04 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:10-Bit, 40MSPS A/D Converter |
| HI5746EVAL1 | 功能描述:EVALUATION PLATFORM HI5746 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| HI5746KCA | 功能描述:IC ADC 10-BIT 40MSPS 28-SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| HI5746KCAZ | 功能描述:模数转换器 - ADC A/D 10-BIT 40MSPS 28 SSOP COM TEMP RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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