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楼主,你好!
“ nput clamp current”是指到地和到电源的钳位二极管所能承受的最大电流,请注意注释里持续的值为2mA,因此芯片虽然内带楼主所说的双二极管保护电路,但是由于钳位电流小,因此还是建议在实际应用中,AD的输入管脚外接双二极管保护电路。