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LTC1841IS8#TRPBF

P1-P3P4-P6P7-P9P10-P12
1
LTC1841/LTC1842/LTC1843
Ultralow Power Dual
Comparators with Reference
LTC1843 Supply Current
vs Supply Voltage
SUPPLY VOLTAGE (V)
0
SUPPLY CURRENT (µA)
3
4
5
8
1841/43 TA02
2
1
0
2
4
6
10
12
T
A
= 25°C
The LTC
®
1841/LTC1842/LTC1843 are ultralow power dual
comparators with built-in reference (LTC1842/LTC1843).
The comparators feature less than 5.7µA 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 0.01µF without oscillation.
The LTC1841 operates from a single 2V to 11V supply or
a dual ±1V to ±5.5V supply. The LTC1842/LTC1843
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.
FEATURES
DESCRIPTION
U
■
Ultralow Quiescent Current: 3.5
µ
A Typ
■
Open-Drain Outputs Typically Sink
Greater Than 20mA
■
Wide Supply Range: (LTC1841)
Single: 2V to 11V
Dual: ±1V to ±5.5V
■
Input Voltage Range Includes the Negative Supply
■
Reference Output Drives 0.01
µ
F Capacitor
■
Adjustable Hysteresis
■
12µs Propagation Delay with 10mV Overdrive
■
No Current Spike When Switching
R4
20k
R
C
20k
C
C
0.0µF
R7
500k
OUTPUT
5V
600mA
LBO
R5
1.1M
R3
1M
R2
100k
R1
1.5M
C1
100µF
1-CELL
Li-Ion
BATTERY
R6
25k
7
8
67
D1
L1
10µH
48
3
12
1
6
C1, C2: SANYO OS-CON
D1: MOTOROLA MBRS130LT3
L1: COILTRONICS CTX10-3
25
1841/43 TA01
3
4
+
C2
100µF
Si9924DY
+
–
+
–
+
V
CC
OUT B
LTC1843
OUT A
REF
V
–
HYST
IN A
+
IN B
–
V
IN
SW
LT1302-5
SHDN
PGND
I
T
SENSE
V
C
GND
TYPICAL APPLICATION
U
Single Li-Ion Cell to 5V Supply
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIONS
U
■
Battery-Powered System Monitoring
■
Threshold Detectors
■
Window Comparators
■
Oscillator Circuits
2
LTC1841/LTC1842/LTC1843
ABSOLUTE MAXIMUM RATINGS
W
WW
U
(Note 1)
Voltage
V
+
to V
–
................................................12V to –0.3V
IN
+
, IN
–
, HYST ................. (V
+
+ 0.3V) to (V
–
– 0.3V)
REF................................... (V
+
+ 0.3V) to (V
–
– 0.3V)
OUT ................................................ 12V to (V
–
– 0.3V)
Current
IN
+
, IN
–
, HYST ................................................. 20mA
REF................................................................... 20mA
OUT .................................................................. 50mA
OUT Short-Circuit Duration (V
+
≤ 5.5V) ...... Continuous
Power Dissipation............................................. 500mW
Operating Temperature Range
LTC1841C/LTC1842C/LTC1843C ........... 0°C to 70°C
LTC1841I/LTC1842I/LTC1843I.......... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
PACKAGE/ORDER INFORMATION
W
U
U
1
2
3
4
8
7
6
5
TOP VIEW
OUT A
V
–
IN A
+
IN A
–
OUT B
V
+
IN B
+
IN B
–
S8 PACKAGE
8-LEAD PLASTIC SO
1841
1841I
S8 PART
MARKING
1
2
3
4
8
7
6
5
TOP VIEW
OUT A
V
–
IN A
+
IN B
+
OUT B
V
+
REF
HYST
S8 PACKAGE
8-LEAD PLASTIC SO
1
2
3
4
8
7
6
5
TOP VIEW
OUT A
V
–
IN A
+
IN B
–
OUT B
V
+
REF
HYST
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C, θ
JA
= 125°C/ W
T
JMAX
= 150°C, θ
JA
= 125°C/ W T
JMAX
= 150°C, θ
JA
= 125°C/W
ORDER PART
NUMBER
LTC1841CS8
LTC1841IS8
S8 PART
MARKING
ORDER PART
NUMBER
S8 PART
MARKING
1842
1842I
LTC1842CS8
LTC1842IS8
ORDER PART
NUMBER
LTC1843CS8
LTC1843IS8
1843
1843I
ELECTRICAL CHARACTERISTICS
V
+
= 5V, V
–
= 0V, T
A
= 25°C unless otherwise noted.
Consult factory for Military grade parts.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply
V
+
Supply Voltage Range LTC1841 ● 2.0 11 V
LTC1842/LTC1843
● 2.5 11 V
I
CC
Supply Current HYST = REF (Note 2) ● 3.5 5.7 µA
Comparator
V
OS
Comparator Input Offset Voltage (Note 3) ● ±3 ±10 mV
I
IN
Input Leakage Current (IN
+
, IN
–
)IN
+
= IN
–
= 2.5V (LTC1841), ● ±0.01 ±1.0 nA
IN
+
= IN
–
= V
REF
(LTC1842/LTC1843)
V
IN
Comparator Input Voltage Range ● V
–
V
+
– 1.3V V
PSRR Power Supply Rejection Ratio V
+
= 2V to 11V (LTC1841), 0.1 1 mV/V
V
+
= 2.5V to 11V (LTC1842/LTC1843)
CMRR Common Mode Rejection Ratio V
CM
= V
–
to (V
+
– 1.3V) LTC1841 ● 0.1 1 mV/V
V
HYST
Hysteresis Input Voltage Range LTC1842/LTC1843 ● V
REF
– 50mV V
REF
V
3
LTC1841/LTC1842/LTC1843
ELECTRICAL CHARACTERISTICS
V
+
= 5V, V
–
= 0V, T
A
= 25°C unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
PD
Propagation Delay C
OUT
= 10pF, R
PULL-UP
= 100k Overdrive = 10mV 12 µs
Overdrive = 100mV 4 µs
I
LEAK
Output Leakage Current V
OUT
= 12V (Note 2) ● 1 100 nA
V
OL
Output Low Voltage I
OUT
= 1.8mA ● V
–
+ 0.4V V
Reference (LTC1842/LTC1843)
V
REF
Reference Voltage No Load 25°C 1.174 1.182 1.190 V
0°C to 70°C ● 1.170 1.194 V
–40°C to 85°C ● 1.164 1.200 V
∆V
REF
Load Regulation I
SOURCE
= 1mA ● 13 mV
I
SINK
=10µA 1.75 4 mV
● 6mV
e
n
Voltage Noise 100Hz to 100kHz 100 µV
RMS
V
+
= 3V, V
–
= 0V, T
A
= 25°C unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply
V
+
Supply Voltage Range LTC1841 ● 2.0 11 V
LTC1842/LTC1843
● 2.5 11 V
I
CC
Supply Current HYST = REF (Note 2) ● 3.5 5.5 µA
Comparator
V
OS
Comparator Input Offset Voltage (Note 3) ● ±3 ±10 mV
I
IN
Input Leakage Current (IN
+
, IN
–
)IN
+
= IN
–
= 1.5V (LTC1841), ● ±0.01 ±1nA
IN
+
= IN
–
= V
REF
(LTC1842/LTC1843)
V
IN
Comparator Input Voltage Range ● V
–
V
+
– 1.3V V
PSRR Power Supply Rejection Ratio V
+
= 2V to 11V (LTC 1841), 0.1 1 mV/V
V
+
= 2.5V to 11V (LTC1842/LTC1843)
CMRR Common Mode Rejection Ratio V
CM
= V
–
to (V
+
– 1.3V) LTC1841 ● 0.1 1 mV/V
V
HYST
Hysteresis Input Voltage Range LTC1842/LTC1843 ● V
REF
– 50mV V
REF
V
t
PD
Propagation Delay C
OUT
= 10pF, R
PULL-UP
= 100k Overdrive = 10mV 14 µs
Overdrive = 100mV 5 µs
I
LEAK
Output Leakage Current V
OUT
= 12V (Note 2) ● 1 100 nA
V
OL
Output Low Voltage I
O
= 0.8mA ● V
–
+ 0.4V V
Reference (LTC1842/LTC1843)
V
REF
Reference Voltage No Load 25°C 1.174 1.182 1.190 V
0°C to 70°C ● 1.170 1.194 V
–40°C to 85°C ● 1.164 1.200 V
∆V
REF
Load Regulation I
SOURCE
= 1mA ● 26 mV
I
SINK
=10µA 1.75 4 mV
● 6mV
e
n
Voltage Noise 100Hz to 100kHz 100 µV
RMS
The ● denotes specifications which apply over the full operating
temperature range.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: IN
+
= IN
–
+ 80mV, output is in high impedance state.
Note 3: V
CM
= 1/2(V
+
– V
–
) for LTC1841, V
CM
= V
REF
for LTC1842/
LTC1843.
P1-P3P4-P6P7-P9P10-P12

LTC1841IS8#TRPBF

Mfr. #:
Buy LTC1841IS8#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog Comparators uP Dual Comp w/Open Drain Outputs
Lifecycle:
New from this manufacturer.
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