At present, DTM0660 series main control chip is popular in digital multimeter.
This series of chips is widely used in various brand products and grade models, and its characteristics are:
1, the peripheral circuit is simple, low production cost.
2, MCU solution, high precision, high accuracy, small temperature drift.
3, the configuration parameters are stored in the external chip (such as 24C02), easy to proofread, with functional expansion space.
4, the use of ordinary 1.5V dry battery, convenient, low cost.