4-range digital voltmeter circuit using ADD3701
Source: InternetPublisher:赔钱虎 Keywords: Voltmeter ADD3701 Updated: 2024/08/16
The 4-range 3 3/4-digit digital voltmeter circuit composed of ADD3701 is shown in the figure. The 4 ranges are 400 mV, 4V, 40 V, and 400 V. Unless otherwise specified, the resistors in the figure have a power of 0.25 W, and the allowable resistance error is ±5%; the error of all capacitor values is ±10%; R1R2/(R1+R2) =R3±25Ω.
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