|
本帖最后由 xll 于 2009-7-16 18:04 编辑
搞个这东西用来校表不错,超低温飘1ppm/°C、低噪声、+2.5V/+4.096V/+5V电压基准。
SO8封装,不算难焊。电路也简单就一个IC外加3个电容搞定。
The MAX6325/MAX6341/MAX6350 are low-noise, precision voltage references with extremely low, 0.5ppm/°C typical temperature coefficients and excellent, ±0.02% initial accuracy. These devices feature buried-zener technology for lowest noise performance. Load-regulation specifications are guaranteed for source and sink currents up to 15mA. Excellent line and load regulation and low output impedance at high frequencies make them ideal for high-resolution data-conversion systems up to 16 bits.
The MAX6325 is set for a 2.500V output, the MAX6341 is set for a 4.096V output, and the MAX6350 is set for a 5.000V output. All three provide for the option of external trimming and noise reduction.
关键特性 | | 应用/使用 | - Ultra-Low, 1ppm/°C Max Tempco
- Very Low, 1.5µVp-p Noise (0.1Hz to 10Hz) (MAX6325)
- ±0.02% Initial Accuracy (MAX6350)
- ±15mA Output Source and Sink Current
- Low, 18mW Power Consumption (MAX6325)
- Industry-Standard Pinout
- Optional Noise Reduction and Voltage Trim
- Excellent Transient Response
- 8-Pin SO Package Available
- Low, 30ppm/1000h Long-Term Stability
- Stable for All Capacitive Loads
|
|
搞了个PCB,方便大家热转印。带电位器微调功能,板子大小2.3*2.2cm。
就是供电要求是10V的,有稳压可调电源的朋友可以试试,我觉得最好用电池供电,可以用9V层叠电池。
来个图
|
|