11

LT1077

1077fa

Comparator Applications

The single supply operation of the LT1077 and its

ability to swing close to ground while sinking current,

Comparator Rise Response Time

to 10mV, 5mV, 2mV Overdrive

Comparator Fall Response Time

to 10mV, 5mV, 2mV Overdrive

TYPICAL APPLICATIO S

Megaohm Input Impedance

Gain of 10 Difference Amplifier

OUTPUT

0.005 TO 2.4V

BANDWIDTH =

OUTPUT OFFSET =

OUTPUT NOISE =

SUPPLY CURRENT =

20KHZ

0.7mV

80µVPP (0.1Hz TO 10Hz)

45µA

THE USEFULNESS OF DIFFERENCE AMPLIFIERS IS LIMITED BY THE FACT

THAT THE INPUT RESISTANCE IS EQUAL TO THE SOURCE RESISTANCE.

THE PICO-AMPERE OFFSET CURRENT AND LOW CURRENT NOISE OF THE LT1077

ALLOWS THE USE OF 1M SOURCE RESISTORS WITHOUT DEGRADATION IN

PERFORMANCE. IN ADDITION, WITH MEGAOHM RESISTORS MICROPOWER

OPERATION CAN BE MAINTAINED

6

7

4

2

3

3V

10M

10M

1M

1M

INPUT

–

+

LT1077 • TA03

lends itself to use as a precision comparator with

TTL compatible output.

200µs/DIV

0

0

2

4

–100

200µs/DIV

0

0

2

4

100

APPLICATIO S I FOR ATIO