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参数资料
| 型号： | DAC8408GPZ |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | DAC |
| 英文描述： | QUAD, PARALLEL, 8 BITS INPUT LOADING, 0.19 us SETTLING TIME, 8-BIT DAC, PDIP28 |
| 封装： | PLASTIC, DIP-28 |
| 文件页数： | 6/16页 |
| 文件大小： | 219K |
| 代理商： | DAC8408GPZ |
DAC8408
–14–
REV. A
Figure 11. A Digitally Programmable, Low-Distortion Sinewave Oscillator
A LOW-DISTORTION, PROGRAMMABLE
SINEWAVE OSCILLATOR
By varying the previous state-variable filter topology slightly,
one can obtain a very low distortion sinewave oscillator with
programmable frequency feature as shown in Figure 11. Again,
DAC B and DAC D in tandem control the oscillating frequency
based on the relationship fC = 1/2
πRC. Positive feedback is
accomplished via the 82.5 k
and the 20 k potentiometer.
The Q of the oscillator is determined by the ratio of 10 k
and
475
in series with the FET transistor, which acts as an auto-
matic gain control variable resistor. The AGC action maintains
a very stable sinewave amplitude at any frequency. Again, only
two ICs accomplish a very useful function.
At the highest frequency setting, the harmonic distortion level
measures 0.016%. As the frequencies drop, distortion also drops
to a low of 0.006%. At the lowest frequency setting, distortion
came back up to a worst case of 0.035%.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DAC8408HP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
| DAC8411 | 制造商:TI 制造商全称:Texas Instruments 功能描述:1.8V to 5.5V, 80mA, 14- and 16-Bit, Low-Power, Single-Channel,DIGITAL-TO-ANALOG CONVERTERS in SC70 Package |
| DAC8411EVM | 功能描述:数据转换 IC 开发工具 DAC8411 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| DAC8411EVM | 制造商:Texas Instruments 功能描述:Development Tool |
| DAC8411EVM-PDK | 功能描述:数据转换 IC 开发工具 DAC8411 Perf Demo Kit RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
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