LT1011A_15 Datasheet, PDF (13/20 Pages) Linear Technology – Voltage Comparator

Typical Applications
Combining Offset Adjust and Strobe
V⁺
10k
5 ^20k
3–
6
LT1011
2+
TTL OR CMOS
5V
1k
1011 TA13
LT1011/LT1011A
Combining Offset Adjustment and Hystersis
5k
V⁺
2R_H**
6 ^20k
3–
5
LT1011
2+
1
R_H*
7
*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
3–
6
LT1011
2+
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
OUTPUT
*MYLAR
**SELECT FOR REQUIRED RESET TIME CONSTANT
***INPUT POLARITY IS REVERSED WHEN USING PIN 1 AS OUTPUT
Low Drift R/C Oscillator^†
**
15V
C1
0.015µF
2₊
8
LT1011
3_–
1
15V
1k
7
4
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
LT1011
7
2k _{2 +}
1
+ _C1*
4
2µF
2_–
LT1008
6
10k _{3 +}
8
100pF
1011 TA18
OUTPUT
–15V
*MYLAR
**SELECT FOR REQUIRED RESET TIME CONSTANT
For more information www.linear.com/LT1011
1011afe
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