You can refer to below sensitivity characterristics:
ICX409AK, SuperHADCCD, typical 950mV
ICX259AK, ExviewHADCCD, typical 1100mV
ICX639AK, SuperHAD-IICCD, typical 2250mV
So, it seems that ICX638AK or ICX639AK should be better perfermance in low lux light. For your requierment, there should be some camera model based on this CCD chip. But you'd test for details by yourself.
Thanks.