• AD8561: VOH VLO related questions

    Concerning the AD8561:
    We intend to use it with hysteresis as recommended in the data sheet. We also
    intend to connect
    a 5KW pull-up resistor to +3.3V for 3V operation.
    For that configuration :

    1.      What will be VOH ? (in the data…
  • AD8561 / AD8561S - input voltage range

    Dear Community,

    I have an question related to AD8561/AD8561S (Ultrafast 7 ns Single Supply Comparator): what is the input volatge range (or Input Common-Mode Voltage Range) when this device is powered from +7V (V+=7V, V-=GND)?  I can't see any information…

  • Ad8561

    AD8561 Latch function not working in simulation.  I'm simulating a circuit using the AD8561 and not able to get the latch function to work. I set up a simple test circuit with 5V pwr and GND (a single supply circuit). I put a reference voltage on one…

  • Comparator input noise voltage (density) - in AD8561 and similar

    I'm working with a mature high power Class D amplifier design, and am having some issues with noise generated in the naturally-sampled PWM modulator. This comprises a simple analog ramp generator (an op-amp based integrator, creating a roughly 150kHz…

  • AD8561 hysteresis

    hello,

    In the AD8561 datasheet, page 8, a hysteresis circuit is shown:

    The capacitor CF is added to introduce a pole into the feedback network.

    The calculation for this pole is: 

    Is this formula correct? In the formula, I would use R1 instead of R2.

  • AD8561 Hysteresis

    hello,

    In the AD8561 datasheet, page 8, a hysteresis circuit is shown:

    The capacitor CF is added to introduce a pole into the feedback network.

    The calculation for this pole is: 

    Is this formula correct? In the formula, I would use R1 instead of R2.

  • AD8561 offset voltage measurement

    Hi Team,

    The Vout is getting saturated on trying to determine the input offset voltage of AD8561 through below servo circuit.

    Please help to confirm whether this approach is good to proceed and also please provide your suggestion.

    Thank you,

    Bala Suren…

  • Comparator stability - AD8561 versus LT1711

    hello,

    I've been using the ad8561 in the following circuit:

    IN- connected to OUT- via few resistors (hystersis of few tens of mV) around 0V.

    IN+ gets a sine wave signal with frequencies as low as 100Hz. When crossing the 0V point, the output toggles…

  • AD8561 Spice.cir cannot work in HSPICE after changed the spice.cir as spice.sp.

    hello! 

    I need to SI simulations in HSpice with the AD8561 and download the spice.cir.  After changed the spice.cir to the spice.sp used in HPspice , errors happened, as figure.

    however, this spice.cir can work in PSpice Soffware normally, as figure.