LT1017_15 Datasheet, PDF (1/16 Pages) Linear Technology – Micropower Dual Comparator

FEATURES
n _{Maximum Offset Voltage: 1mV}
n _{Maximum Bias Current: 15nA}
n _{Typical Output Drive: 70mA}
n _{Operates from 1.1V to 40V}
n _{Internal Pull-Up Current}
n _{Output Can Drive Loads Above V}⁺
n _{30μA Supply Current (LT1017)}
110μA Supply Current (LT1018)
n _{Available in 8-Lead PDIP, 8-Lead Plastic S0, and}
16-Lead Plastic SO Packages
APPLICATIONS
n _{Power Supply Monitors}
n _{Relay Driving}
n _Oscillators
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LT1017/LT1018
Micropower
Dual Comparator
DESCRIPTION
The LT^®1017/LT1018 are general purpose micropower
comparators. The LT1017 is optimized for lowest operat-
ing power while the LT1018 operates at higher power and
higher speed. Both devices can operate from a single 1.1V
cell up to 40V. The output stage includes a class “B” pull-
up current source, eliminating the need for an external
resistive pull-up and saving power. The output stage is
also designed to allow driving loads connected to a supply
more positive than the device, as can comparators with
open-collector output stages.
Input specifications are also excellent. On-chip trimming
minimizes offset voltage, while high gain and common
mode rejection ratio keep other input referred errors low.
Common mode voltage range includes ground. Special
circuitry prevents false output states even if the input is
overdriven.
The LT1017/LT1018 are pin compatible with older dual
comparators such as 393 type devices.
TYPICAL APPLICATION
1.5V Powered Refrigerator Alarm
V⁺
1.5V
665k
1%
665k 52.3k
1%
1%
3₊
8
1
1/2 LT1017
2_–
OUTPUT HIGH FOR
0°C ≤ T ≤ 5°C
YSI 44011
258.3k AT 5°C
333.1k AT 0°C
280k
1%
5₊
7
1/2 LT1017
6_–
4
1017/18 TA01
160
140
120
100
80
60
40
20
0
1
Supply Current
LT1018
OUTPUTS
LOW
LT1017
OUTPUTS
LOW
LT1018
OUTPUTS
HIGH
LT1017
OUTPUTS
HIGH
24
10 20 40
100
TOTAL SUPPLY VOLTAGE (V)
1017/18 TA02
10178ff
1