Selection of reference source-EEWORLD

Collect

tl431

lm285 385 or the like, 1.2V

The AD reference voltage requirement of STM32 is >2.4V

REF2930-3V costs more than 20 yuan, which is too high. Chaliyuan only quoted a few yuan. Is there a problem with TI's supply? Since 3.0V references are rare and hard to find, I want to use 2.5V references.

For 3V voltage reference, you can consider other companies besides TI, such as MAXIM: MAX6003. The initial accuracy of MAX6003 is <1%, which is better than REF2930.

I looked again and found that the MAX6010B is better:
Ultra-low supply current: 5µA (max)
3V output at 3.2V input
Small size, 3-pin SOT23 package
Initial accuracy: ±0.4% (max)
Low temperature drift: 50ppm/°C (max)
200mV low dropout
Load regulation (7mA source current): 200µV/mA (max)
Input regulation 3.2V to 5.5V: 350µV/V (max)

Reference address：Selection of reference source

Previous article：The difference between ARM7, ARM9, cortex-m3, cortex-m4, cortex-a8
Next article：When using AD for STM32 with 64 pins or less, please refer to the power supply processing method.

Recommended ReadingLatest update time:2024-11-16 14:48

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