ZHCSI38E March 2001 – April 2018 OPA2355 , OPA3355 , OPA355
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文档支持
- 13机械、封装和可订购信息
9.2.3 Driving ADCs
The OPAx355 op amps are designed to drive sampling analog-to-digital converters (ADCs) with sampling speeds up to 1 MSPS. The zero-crossover distortion input stage topology allows the OPAx355 series to drive ADCs without degrading differential linearity and THD.
The OPAx355 series buffers the ADC switched input capacitance and resulting charge injection while providing signal gain. Figure 35 shows the OPAx355 series configured to drive the ADS8326.
1.
NOINDENT:
Suggested value; may require adjustment based on specific application.2.
Figure 35. Driving the ADS8326 NOINDENT:
Single-supply applications lose a small number of ADC codes near ground as a result of op amp output swing limitation. If a negative power supply is available, this simple circuit creates a –0.3-V supply to allow output swing to true ground potential.