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ADCMP607 comparator info

Hi,

We are using ADCMP607 comparator one of our design.
Please provide below info for my design.

1> Can we connect same power supply voltage to both VCCI and VCCO or connect the different voltages?
what is non operating range in electric characristics?
VCCI - VCCO Operating -3.0 +3.0 V
VCCI - VCCO Nonoperating -6 +6 V
Please elaborate.

2> Can i set hysterisis by just connecting one 100K or 200K ohm resistor pull down to ground to LE/HYS pin, if am not using Latch enable?.
In Figure 18. Hysteresis vs. RHYS Control Resistor graph
if i am connecting 100K pulldown then it show 100mV hysterisis. it means +/- 100 mV or +/- 50 mV?

3> we are using this comaparator in high speed paths where we need to measure 6 nS rise time of signal. How much delays the this comaprator add in signal path?

Waiting for reply..

Thanks and regards,

Ansar 

  • Hi Ansar,

    1. Yes you can connect the VCCI & VCCO pins together for ADCMP607.  The +/-3V spec is the difference between VCCI&VCCO pin when the part is in normal operation (operating) meanwhile the +/-6V spec is the difference between VCCI&VCCO pin when the part is in shutdown mode (nonoperating).

    2. Yes to configure it for hysteresis mode, the resistor is connected from LE/HYS pin to ground. For 100kohm pulldown, the hysteresis (Vh) will be 100mV. But the input have a difference of +/-50mV (Vh/2) with the reference to trigger an action at the output.

    3. The propagation delay for the ADCMP607 is 1.2ns typical. You could consult on the timing diagram on the data sheet for more information regarding timing/delays on the comparator.

    Thanks and best regards,

    Rainier