Texas Instruments OPAx626 高带宽高精度运算放大器
Texas Instruments OPAx626 高带宽运算放大器是 16 位和 18 位高精度 SAR ADC 驱动器，具有低总谐波失真 (THD) 和噪声。 这些精密运算放大器与众不同，指定 16 位稳定时间为 280ns，实现真正的 16 位有效位数 (ENOB)。 这些器件具备高直流精度（偏移电压仅为 100µV）和 120MHz 的宽增益带宽积。 上述这些特性以及 2.5nV/√Hz 的低宽带噪声使这些器件优化用于驱动 ADS88xx 等应用中的高通量、高分辨率 SAR ADC。 OPAx626 系列可提供 5 引脚 SOT 和 8 引脚 VSSOP 封装，指定工作温度范围是 -40°C 至 +125°C。
特性
- Excellent dynamic performance
- –122dBc for HD2 and –140dBc for HD3 at 100kHz for low distortion
- 120MHz gain bandwidth (G = 100)
- 115V/µs slew rate
- 280ns 16-bit settling at 4V step
- 2.5nV/√Hz at 10kHz low voltage noise
- 1Ω at 1MHz low output impedance
- Excellent DC precision
- ±100µV (maximum) offset voltage
- ±3µV/°C (maximum) offset voltage drift
- 2mA (typical) low quiescent current
- Input common-mode range includes the negative rail
- Rail-to-rail output
- Fully specified from –40°C to +125°C wide temperature range
应用
- Precision SAR ADC drivers
- Precision voltage reference buffers
- Programmable logic controllers
- Test and measurement equipment
- Scientific instrumentation
- High throughput data acquisition systems
- High density, multiplexed data acquisition systems
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Functional Block Diagram
发布日期: 2016-09-13
| 更新日期: 2022-03-11