DIO2186

Version 1.0, Apr 2026

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© 2026 Dioo Microcircuits Co., Ltd. Jiangsu

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these resistors as small as possible. This circuit limits only short-term transients. This combination uses the

least amount of board space.

Figure 14. Transient protection using dual zener diodes

When low-power Zener diodes do not have sufficient transient absorption capability, a higher-power

transzorb must be used. The most package-efficient solution involves using a single transzorb and

back-to-back diodes between the device inputs.

Figure 15. Transient protection using a single transzorb and input clamps

9.5. Typical applications

The DIO2186 features low input bias current, which allows small-value current monitoring. To monitor

accurately currents in the microamp range, it is recommended to increase the sense resistor value, so the

sense voltage can be increased. Therefore, the error introduced by the offset voltage is small. It is shown

below that the circuit configuration for monitoring low-value currents. As a result of the differential input

impedance of the DIO2186, the recommended value of RShunt is ≤ 500 Ω.