Datasheet

TLV3201

TLV3202

SBOS561A –MARCH 2012–REVISED JUNE 2012

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CIRCUIT LAYOUT

The TLV3201 and TLV3202 are fast-switching, high-speed comparators and require high-speed layout

considerations. For best results, the following layout guidelines should be maintained:

1. Use a printed circuit board (PCB) with a good, unbroken low-inductance ground plane.

2. Place a decoupling capacitor (0.1-μF ceramic, surface-mount capacitor) as close as possible to V

3. On the inputs and the output, keep lead lengths as short as possible to avoid unwanted parasitic feedback

around the comparator. Keep inputs away from the output.

4. Solder the device directly to the PCB rather than using a socket.

5. For slow-moving input signals, take care to prevent parasitic feedback. A small capacitor (1000 pF or less)

placed between the inputs can help eliminate oscillations in the transition region. This capacitor causes some

degradation to propagation delay when the impedance is low. The topside ground plane runs between the

output and inputs.

6. The ground pin ground trace runs under the device up to the bypass capacitor, shielding the inputs from the

outputs.

APPLICATIONS CIRCUITS

One of the benefits of ac coupling a single-supply comparator circuit is that it can block dc offsets induced by

ground-loop offsets that could potentially produce either a false trip or a common-mode input violation. Figure 30

shows the TLV3201 configured as an ac-coupled comparator.

Figure 30. TLV3201 Configured as an AC-Coupled Comparator

Product Folder Link(s): TLV3201 TLV3202