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TLV3602: Consultation on the selection of Tlv360x

Vayne Li
Expert 1630 points

Part Number: TLV3602
Other Parts Discussed in Thread: TLV3601, TLV3601-Q1

Hi Teams,

My customer is looking for a high-speed comparator.
The requirements are as follows:
1.Power supply 1.8V~3.3V
2.Input signal frequency ≥ 200MHz
3.Low end-to-end transmission latency
4.Single or dual input, output
5 ROHS,Industrial grade/automotive grade

I recommended TLV3602 and TLV3601 to them.

he customer has a question here, can this series of products meet the customer's input signal of 100MHz, 0dB sine wave? Has TI simulated this situation before?
thank you

  • 0
    TI__Guru 66436 points

    Hello Vayne,

    The TLV3601 should be able to handle 200MHz. The rated 'toggle" frequency is 325MHz.

    Any faster, and the output will have to be differential (LVDS, RSPECL or CML), as the TLV3601/2/3 family is the fastest with a push-pull single ended output.

    0dBm is about 600mVp-p, which is plenty of overdrive to get the fastest speeds.

    The TLV3601-Q1 is the automotive version. All are RoHS.

    The minimum voltage is 2.4V, which does not meet the 1.8V min supply. None of our high speed devices will operate at 1.8V.

  • 0 in reply to Paul Grohe
    Expert 1630 points

    Hi Paul,

    Hello, the customer used TLV3601 for simulation, and the signal source was a 100M sine wave with Vcm=0 and Vpp=1V. A 200K Ω hysteresis resistor was added, but the effect was not good.

    Reducing the frequency to 10M is not good either, there is an overshoot at the edge.

    Please help optimize it,thank you!

  • 0 in reply to Vayne Li
    TI__Mastermind 26790 points

    Thanks for following up.  Please share schematic.  You mention VCM=0V, which means you are grounding one of the inputs.  If that is the case, it is not recommended to drive the other pin +/-500mV (1Vpp) as you have indicated.  All inputs should be above GND.

    Chuck