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Dual comparator suits power-sensitive apps

Posted: 30 Apr 2007 ?? ?Print Version ?Bookmark and Share

Keywords:dual comparators? high-speed comparators? power-sensitive applications?

LMH7322 dual comparator from National Semiconductor

National Semiconductor released the LMH7322 dual comparator, which operates from an input supply-voltage range of 2.7-12V. The LMH7322 joins the LMH7220 single comparator as part of a family of single, dual and quad high-speed comparators which feature LVDS and reduced-swing positive emitter-coupled logic (RSPECL) outputs.

The high-speed, dual comparator consumes low power (21mA typical) with sub-nanosecond (700ps) propagation delay. The device also features an input common-mode range which extends 200mV below the negative rail and its adjustable hysteresis adds flexibility and minimizes state changes due to spurious noise. The LMH7322 provides fast rise and fall times of 160ps, and its RSPECL outputs and latch inputs reduce EMI.

In addition, the dual comparator delivers 700ps propagation delay and dispersion of 5ps at >100mV overdrive, which allows accurate delay control. Separate input and output supply pins enable level-shifting applications, while the devices' typical power consumption of 21mA makes the LMH7322 well-suited for power-sensitive applications. The LMH7220's 2.9ns typical propagation delay and 0.6ns rise and fall times consume 6.8mA supply current at 5V. Both parts offer performance from -40C to 125C.

The LMH7322 dual comparator is available and priced at $4.31.

- Emily Gleason
eeProductCenter




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