Key parametric decisions for the comparator selection
The ADCMP563BCPZ-WP: With a 0.83 ns maximum propagation delay, this dual comparator resolves input differences fast enough for high-speed threshold detection, clock recovery, or zero-crossing circuits where timing margin is tight. The latch function (Type: with Latch) holds the output state after the compare strobe, which is essential in sampled-data systems — the comparator captures the input level at a specific clock edge and retains it until the next latch enable. Typical CMRR of 80 dB and PSRR of 85 dB mean the comparator rejects common-mode noise on the inputs and supply ripple, maintaining threshold accuracy in noisy industrial or mixed-signal environments.
Package and board-fit note
Housed in a 16-lead LFCSP-WQ (3x3 mm) with exposed pad — the thermal pad should be soldered to a PCB copper plane for adequate heat dissipation, especially when both comparators are switching at speed.
Complementary outputs and input characteristics
Complementary output type provides both in-phase and inverted signals — useful for driving differential lines or feeding a latch input and its complement without external inversion. Maximum input bias current of 10 µA at 5 V and input offset voltage of 10 mV at 5 V define the DC accuracy floor; for precision threshold applications, account for these offsets in the trip-point calculation. Each output can sink or source 30 mA typical, enough to drive a standard logic gate input or a small LED indicator directly.