LMC7221

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SNOS748E – SEPTEMBER 1999 – REVISED MARCH 2013

Typical Performance Characteristics (continued)

Leakage Current

vs.

Supply Voltage

Figure 15.

APPLICATION INFORMATION

BENEFITS OF THE LMC7221 TINY COMPARATOR

Size

The small footprint of the 5-Pin SOT-23 packaged Tiny Comparator, (0.120 x 0.118 inches, 3.05 x 3.00 mm)

saves space on printed circuit boards, and enable the design of smaller electronic products. Because they are

easier to carry, many customers prefer smaller and lighter products.

Height

The height (0.056 inches, 1.43 mm) of the Tiny Comparator makes it possible to use it in PCMCIA type III cards.

Simplified Board Layout

The Tiny Comparator can simplify board layout in several ways. First, by placing a comparator where

comparators are needed, instead of routing signals to a dual or quad device, long pc traces may be avoided.

By using multiple Tiny Comparators instead of duals or quads, complex signal routing and possibly crosstalk can

be reduced.

Low Supply Current

The typical 7

μA supply current of the LMC7221 extends battery life in portable applications, and may allow the

reduction of the size of batteries in some applications.

Wide Voltage Range

The LMC7221 is characterized at 15V, 5V and 2.7V. Performance data is provided at these popular voltages.

This wide voltage range makes the LMC7221 a good choice for devices where the voltage may vary over the life

of the batteries.

Digital Outputs Representing Signal Level

Comparators provide a high or low digital output depending on the voltage levels of the (+) and (

−) inputs. This

makes comparators useful for interfacing analog signals to microprocessors and other digital circuits. The

LMC7221 can be thought of as a one-bit a/d converter.

Open Drain Output

The open drain output is like the open collector output of a logic gate. This makes the LMC7221 very useful for

mixed voltage systems.

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