LTC6953 maximum input voltage on pins IN+ and IN-, while part is unpowered?

Hello

Absolute maximum rating in datasheet for all inputs LTC6953:

from GND – 0.3V to V+ + 0.3V

Does it mean if LTC6953 is unpowered, I can't apply voltage to inputs IN+ or IN- more than ±0.3Vpp, or it means 0.3 Vrms? For example, please tell me how many dBm I can apply to J28 input dc2610a, when the board is not powered?