LT1011 Datasheet, PDF (11/16 Pages) Linear Technology – Voltage Comparator

TYPICAL APPLICATIONS
Combining Offset Adjust and Strobe
V⁺
10k
20k
5
–
6
LT1011
+
TTL OR CMOS
5V
1k
1011 TA13
LT1011/LT1011A
Combining Offset Adjustment and Hystersis
5k
2R_H**
R_H*
6 ^20k
–
5
7
LT1011
+
1
V⁺
*HYSTERESIS IS ≈ 0.45mV/µA OF
CURRENT CHANGE IN R_H
R_L
**THIS RESISTOR CAUSES HYSTERESIS
TO BE CENTERED AROUND V_OS
1011 TA15
Direct Strobe Drive When CMOS* Logic
Uses Same V⁺ Supply as LT1011
V⁺
8
–
6
LT1011
+
1011 TA14
*NOT APPLICABLE FOR TTL LOGIC
Positive Peak Detector
15V
INPUT
2k ₃
8
7
LT1011
2
1
2₊
6
4
1M** ₊
LT1008
10k _{3 –}
8
C1* ^100pF
2µF
1011 TA17
–15V
*MYLAR
**SELECT FOR REQUIRED RESET TIME CONSTANT
OUTPUT
Low Drift R/C Oscillator^†
**
15V
15V
2₊
8
1k
C1
0.015µF
LT1011
7
3_–
4
1
74HC04
×6
BUFFERED
OUTPUT
10k*
10k*
15V
*1% METAL FILM
**TRW TYPE MTR-5/120ppm/°C, 25k ≤ R_S ≤ 200k
C1: 0.015µF = POLYSTYRENE, –120ppm/°C,
± 30ppm WESCO TYPE 32-P
10k*
1011 TA16
NOTE: COMPARATOR CONTRIBUTES ≤10ppm/°C DRIFT
FOR FREQUENCIES BELOW 10kHz
†_{LOW DRIFT AND ACCURATE FREQUENCY ARE}
OBTAINED BECAUSE THIS CONFIGURATION
REJECTS EFFECTS DUE TO INPUT OFFSET
VOLTAGE AND BIAS CURRENT OF THE
COMPARATOR
Negative Peak Detector
15V
1M** _{3 –}
8
INPUT
7
LT1011
2k _{2 +}
1+
C1*
4
2µF
2_–
6
LT1008
10k _{3 +}
8
100pF
1011 TA18
OUTPUT
–15V
*MYLAR
**SELECT FOR REQUIRED RESET TIME CONSTANT
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