LT1011 Linear Technology, LT1011 Datasheet - Page 10

• Manufacturer Part Number: LT1011
• Description: Voltage Comparator
• Manufacturer: Linear Technology

LT1011/LT1011A
TYPICAL APPLICATIONS
10
NOTE: DO NOT GROUND STROBE PIN
INPUT
60Hz
CURRENT MODE
Using Clamp Diodes to Improve Frequency Response*
2
3
(DAC, ETC)
25V
2V
+
–
TO
Strobing
INPUT
LT1011
RMS
RMS
0.22 F
5V
330k
R1*
6
1k
*SEE CURVE, “RESPONSE TIME vs INPUT STEP SIZE”
Noise Immune 60Hz Line Sync**
C1
VOLTAGE
INPUT
27k
R6
TTL
STROBE
7
1011 TA04
75k
R2
R5
10k
3
2
D1
–
+
**
LT1011
*
4
INCREASE R1 FOR LARGER INPUT VOLTAGES
LT1011 SELF OSCILLATES AT 60Hz CAUSING
IT TO “LOCK” ONTO INCOMING LINE SIGNAL
5V
D2
8
R1
U
1
2
3
7
–
+
LT1011
5V
Driving Ground Referred Load
**
INPUTS*
1011 TA11
*
R3
1k
R4
27k
INPUT POLARITY IS REVERSED
WHEN USING PIN 1 AS OUTPUT
V
PIN 1 SWINGS TO WITHIN 2V OF V
GROUND OR
LOW IMPEDANCE
REFERENCE
++
MAY BE ANY VOLTAGE ABOVE V
OUTPUT
60Hz
2
3
7
–
+
V
LT1011
–
4
OUTPUT
1011 TA09
V
+
8
1
7
L1
1011 TA07
V
50 F
++**
C1
++
–
.
+
85kHz
High Efficiency** Motor Speed Controller
R1
1k
R2
470
7
1
100pF
15V
LT1011
LIMIT
LIMIT
HIGH
1N4002
– 5V TO
V
LOW
8
–15V
IN
Crystal Oscillator
4
+
–
2
3
R3*
2
3
10k
10k
0V TO 10V
+
–
2
3
2
3
INPUT
LT1011
1
+
–
+
–
LT1011
LT1011
R4
1k
Window Detector
C2*
0.1 F
8
15V
**
*
1
1
Q1
2N6667
4
R3/C2 DETERMINES OSCILLATION
FREQUENCY OF CONTROLLER
Q1 OPERATES IN SWITCH MODE
MOTOR
GLOBE 397A120-2
7
MOTOR-TACH
7
7
5V
1011 TA08
C3
0.1 F
100k
R5
1k
TACH
V
+
R
OUTPUT HIGH
INSIDE “WINDOW”
AND LOW ABOVE
HIGH LIMIT OR
BELOW LOW LIMIT
L
50k
10k
10k
1011 TA10
R6
2k
R7
1k
1011 TA12
OUT