Datasheet

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
U
Megaohm Input Impedance
Gain of 10 Difference Amplifier
OU
TP
UT
0.005 T
O
2.4
V
BANDWIDTH
=
OU
TP
U
T
O
FF
S
ET
=
OUTPUT NOISE =
SUPPLY CURRENT =
2
0
KH
Z
0
.7m
V
80µVPP (0.1Hz TO 10Hz)
260µV
RMS
OVER FULL BANDWIDTH
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
1
0M
1
0M
1M
1M
INP
UT
–
+
LT1077 • TA03
lends itself to use as a precision comparator with
TTL compatible output.
200µs/DIV
OUTPUT (V)
0
0
2
4
–100
INPUT (mV)
200µs/DIV
OUTPUT (V)
0
0
2
4
100
INPUT (mV)
V
S
= 5V, 0VV
S
= 5V, 0V
APPLICATIO S I FOR ATIO
WUUU