LTC1842CS8 Linear Technology, LTC1842CS8 Datasheet

IC COMP ULTLOPWR W/REF DUAL8SOIC

LTC1842CS8

Manufacturer Part Number
LTC1842CS8
Description
IC COMP ULTLOPWR W/REF DUAL8SOIC
Manufacturer
Linear Technology
Type
with Voltage Referencer
Datasheet

Specifications of LTC1842CS8

Number Of Elements
2
Output Type
Open Drain
Voltage - Supply
2.5 V ~ 11 V, ±1.25 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1842CS8
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC1842CS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC1842CS8#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
TYPICAL
BATTERY
1-CELL
, LTC and LT are registered trademarks of Linear Technology Corporation.
Li-Ion
Ultralow Quiescent Current: 3.5 A Typ
Open-Drain Outputs Typically Sink
Greater Than 20mA
Wide Supply Range: (LTC1841)
Input Voltage Range Includes the Negative Supply
Reference Output Drives 0.01 F Capacitor
Adjustable Hysteresis
12 s Propagation Delay with 10mV Overdrive
No Current Spike When Switching
Battery-Powered System Monitoring
Threshold Detectors
Window Comparators
Oscillator Circuits
Single: 2V to 11V
Dual: 1V to 5.5V
1.5M
100k
1M
R1
R2
R3
1.1M
R5
20k
R4
+
APPLICATION
4
3
6
C1
100 F
IN B
IN A
REF
U
+
2
Single Li-Ion Cell to 5V Supply
V
+
+
V
CC
7
LTC1843
HYST
U
OUT B
OUT A
5
25k
R6
8
1
3
8
C1, C2: SANYO OS-CON
D1: MOTOROLA MBRS130LT3
L1: COILTRONICS CTX10-3
SHDN
PGND
V
V
IN
C
6
2
LT1302-5
R
20k
C
10 H
C
0.0 F
L1
C
SENSE
GND
SW
I
7
T
1
Comparators with Reference
D1
4
Si9924DY
DESCRIPTION
The LTC
comparators with built-in reference (LTC1842/LTC1843).
The comparators feature less than 5.7 A supply current
over temperature, a 1.182V 1% reference, program-
mable hysteresis and open-drain outputs that sink cur-
rent. The reference output can drive a bypass capacitor of
up to 0.01 F without oscillation.
The LTC1841 operates from a single 2V to 11V supply or
a dual
operate from a single 2.5V to 11V supply or a dual 1.25V
to 5.5V supply. The LTC1842/LTC1843 hysteresis is
easily programmed by using two resistors and the HYST
pin. The comparators’ input operates from the negative
supply to within 1.3V of the positive supply. The compara-
tors’ output stage can typically sink greater than 20mA. By
eliminating the cross-conduction current that normally
happens when the comparators change logic states, power
supply glitches are eliminated.
The LTC1841/LTC1842/LTC1843 are available in SO-8
packages.
1841/43 TA01
R7
500k
+
LTC1841/LTC1842/LTC1843
®
C2
100 F
OUTPUT
5V
600mA
LBO
1841/LTC1842/LTC1843 are ultralow power dual
1V to
Ultralow Power Dual
5.5V supply. The LTC1842/LTC1843
U
5
4
2
1
0
3
0
T
A
= 25 C
LTC1843 Supply Current
2
vs Supply Voltage
SUPPLY VOLTAGE (V)
4
6
8
10
1841/43 TA02
1
12

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LTC1842CS8 Summary of contents

Page 1

... Reference Output Drives 0.01 F Capacitor Adjustable Hysteresis 12 s Propagation Delay with 10mV Overdrive No Current Spike When Switching U APPLICATIONS Battery-Powered System Monitoring Threshold Detectors Window Comparators Oscillator Circuits , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATION Single Li-Ion Cell to 5V Supply + 1-CELL C1 Li-Ion 100 F ...

Page 2

... OUT B – REF + IN B HYST PACKAGE 8-LEAD PLASTIC 150 C, = 125 C/ W JMAX JA S8 PART ORDER PART NUMBER MARKING 1842 LTC1842CS8 1842I LTC1842IS8 + – 5V 0V unless otherwise noted. A CONDITIONS LTC1841 LTC1842/LTC1843 HYST = REF (Note 2) (Note 3) + – 2.5V (LTC1841), + – (LTC1842/LTC1843) REF + 11V (LTC1841), ...

Page 3

ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER t Propagation Delay PD I Output Leakage Current LEAK V Output Low Voltage OL Reference (LTC1842/LTC1843) V Reference Voltage REF V Load Regulation REF e Voltage Noise n + – 3V 0V, ...

Page 4

LTC1841/LTC1842/LTC1843 W U TYPICAL PERFORMANCE CHARACTERISTICS Comparator Response Time vs Input Overdrive, with 100mV 3 50mV 100 – RESPONSE TIME ( s) Comparator Short-Circuit ...

Page 5

W U TYPICAL PERFORMANCE CHARACTERISTICS LTC1842/LTC1843 Hysteresis Control 80 60 OUTPUT HIGH –20 OUTPUT LOW –40 –60 – – V (mV) REF HYST Reference Output Voltage vs Output Load Current 1.190 V ...

Page 6

LTC1841/LTC1842/LTC1843 PIN FUNCTIONS OUT A (Pin 1): Comparator A Open-Drain Output. Output can typically sink greater than 20mA. – V (Pin 2): Negative Supply (Pin 3): Noninverting Input of Comparator A. Input common mode ...

Page 7

U U APPLICATIONS INFORMATION The LTC1841/LTC1842/LTC1843 are dual micropower comparators with a built-in 1.182V reference (LTC1842/ LTC1843). Features include programmable hysteresis, wide supply voltage range (2V to 11V) and the ability for the reference to drive 0.01 ...

Page 8

LTC1841/LTC1842/LTC1843 U U APPLICATIONS INFORMATION – HYST 8V R2 10k 6 REF R3 R1 – V 2.4M 430 Figure 3a. Power Supply Transient Test Circuit ...

Page 9

U U APPLICATIONS INFORMATION 1. Choose the required hysteresis voltage band and calculate values for R4 and R5 according to the formu- las in the hysteresis section. In this example, 5mV of hysteresis has been added at the comparator input ...

Page 10

LTC1841/LTC1842/LTC1843 U TYPICAL APPLICATION WALL ADAPTER 9V 4-CELL BATTERY 130k 0.01 F 47k 10 Battery Switchover Circuit 1N5818 Si9433 LTC1842 1. OUT A 1 562k – 5 HYST + ...

Page 11

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 12

... Low Dropout Regulator with Micropower Quiescent Current and Shutdown LTC1541/LTC1542 Micropower Op Amp, Comparator and Reference LT1634 Micropower Precision Shunt Voltage Reference C-Load is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com ...

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