ltc2263 power dissipation

i have designed a circuit with the differential adc ltc2263,but the power dissipation is more than 500mW, but the datasheet of the ltc2263 said it costs just 100mW, i cannot find the reason, i really need someone to help me !

  • 0
    •  Analog Employees 
    on Jun 3, 2019 9:08 PM

    The schematic doesn't show ground connections for pins 25,41 and 18. The schematic doesn't show a supply voltage for OVDD. The 100mW spec assumes ENC+ is driven single ended with ENC- grounded as shown in Figure 11 of the data sheet. What is driving the analog inputs? Are the drivers included in the 500mW? Are you using 1lane or 2 lane mode? Are you using 1.75mA or 3.5mA mode?