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TMS320F28050: Four Fast Comparators

Part Number: TMS320F28050

I'm looking for a part with four fast comparators (faster than 60ns response time) for a digital power application.  I can't find any good way to filter by comparator count, but I manually found TMS320F28050.  I'm wondering if there are any lower cost parts that also have four fast comparators?  I'm planning on running a DC-DC converter with these comparators, but I thought maybe even a part designed for motor control would work since I would think multiple high-speed comparators would be a common requirement there.  Or is the Piccolo my lowest cost choice?

  • Andy,

    The Piccolo family would be your cheapest option for C2000 devices with comparators.

    Within Piccolo, you have the following comparator counts:

    • F2802x: 2 Standalone
    • F2803x: 3 Standalone
    • * F2805x: 3 Windowed Pairs + 1 Standalone *
    • F2806x: 3 Standalone
    • F2807x: 8 Windowed Pairs

    I put an asterisk on F2805x because its topology is not like the others -- the comparator positive inputs are tightly coupled with embedded PGAs and the negative reference voltage is shared across the three Windowed Pairs so this may not be useful for you.

    F2807x would most certainly meet your needs, but it might be cheaper to use two F280-2x/3x/6x devices.


  • Andy,

    I should also add that these comparators (except for F2805x) include Ramp Generator logic for slope compensation.