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LTC1444CDHD#PBF

P1-P3P4-P6P7-P9P10-P12P13-P14
LTC1443/LTC1444/LTC1445
1
144345fe
Typical applicaTion
DescripTion
Ultralow Power Quad
Comparators with Reference
The LT C
®
1443/LTC1444/LTC1445 are ultralow power quad
comparators with a built-in reference. The comparators
feature less than 8.5µA supply current over temperature,
an internal reference (1.182V ±1% for LTC1443 or 1.221V
±1% for LTC1444/LTC1445), programmable hysteresis
(LTC1444/LTC1445) and TTL/CMOS output (LTC1443/
LTC1445) that sinks and sources current (open-drain
output for LTC1444). The reference output can drive a
bypass capacitor of up to 0.01µF without oscillation.
The comparators operate from a single 2V to 11V supply
or a dual ±1V to ±5.5V supply (LTC1443). Comparator
hysteresis is easily programmable using two resistors and
the HYST pin (LTC1444/LTC1445). Each comparator’s
input operates from the negative supply to within 1.3V of
the positive supply. The LTC1443/LTC1445 comparator
output stage can continuously source up to 40mA. By
eliminating the cross-conducting current that normally
happens when the comparator changes logic states, power
supply glitches are eliminated.
The LTC1443/LTC1444/LTC1445 are available in the
16-pin SO, PDIP and DFN packages.
FeaTures
applicaTions
n
Ultralow Quiescent Current: 8.5µA Max
n
Reference Output Drives 0.01µF Capacitor
n
Adjustable Hysteresis (LTC1444/LTC1445)
n
Wide Supply Range
Single: 2V to 11V
Dual: ±1V to ±5.5V
n
Input Voltage Range Includes the Negative Supply
n
TTL/CMOS Compatible Outputs
n
Propagation Delay: 12µs (Typ) (10mV Overdrive)
n
No Crowbar Current
n
40mA Continuous Source Current
n
Pin Compatible Upgrades for MAX924 (LTC1443)
n
Low Profile (5mm × 4mm × 0.8mm) DFN Package
n
Battery-Powered System Monitoring
n
Threshold Detectors
n
Window Comparators
n
Oscillator Circuits
Reference Settling Test Circuit
–
+
IN A
+
5
OUT
V
+
1.2V
R1
10k
R3
430Ω
R2
2.4M
C1
1.0µF
IN A
–
HYST
REF
4
14
8
5V
TO 8V
144345 TA01
LTC1445
3
9
2
1.21M
1%
3.4M
1%
V
IN
+
–
V
–
Reference Settling
L, LT , LT C , LT M , Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
V
+
8V
5V
V
REF
144345 TA02
OUT
2ms/DIV
2mV/DIV
LTC1443/LTC1444/LTC1445
2
144345fe
absoluTe MaxiMuM raTings
Voltage:
V
+
to V
–
, V
+
to GND, GND 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 (LTC1443) ...............(V
+
+ 0.3V) to (GND – 0.3V)
OUT
(LTC1444/LTC1445) ........(V
+
+ 0.3V) to (V
–
– 0.3V)
Current:
IN
+
, IN
–
, HYST ................................................. 20mA
REF ................................................................... 20mA
OUT .................................................................. 50mA
(Note 1)
1
2
3
4
5
6
7
8
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
N PACKAGE
16-LEAD PDIP
16
15
14
13
12
11
10
9
OUT B
OUT A
V
+
IN A
–
IN A
+
IN B
–
IN B
+
REF
OUT C
OUT D
GND/HYST
†
IN D
+
IN D
–
IN C
+
IN C
–
V
–
T
JMAX
= 150°C, θ
JA
= 90°C/ W (N)
T
JMAX
= 150°C, θ
JA
= 150°C/ W (S)
†
PIN 14 IS GND FOR THE LTC1443
†
PIN 14 IS HYST FOR THE LTC1444 AND LTC1445
16
15
14
13
12
11
10
9
17
1
2
3
4
5
6
7
8
OUT C
OUT D
GND/HYST
†
IN D
+
IN D
–
IN C
+
IN C
–
V
–
OUT B
OUT A
V
+
IN A
–
IN A
+
IN B
–
IN B
+
REF
TOP VIEW
DHD16 PACKAGE
16-LEAD (5mm
×
4mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 41.7°C/ W
EXPOSED PAD (PIN 17) INTERNALLY CONNECTED TO V
–
†
PIN 14 IS GND FOR THE LTC1443
†
PIN 14 IS HYST FOR THE LTC1444 AND LTC1445
pin conFiguraTion
OUT Short-Circuit Duration (V
+
≤ 5.5V) ........Continuous
Power Dissipation .............................................. 500mW
Operating Temperature Range
Commercial..............................................0°C to 70°C
Industrial ............................................ –40°C to 85°C
Storage Temperature Range
PDIP, SO ............................................–65°C to 150°C
DFN .................................................... –65°C to 150°C
Lead Temperature Range (Soldering, 10 sec)
PDIP, SO ........................................................... 300°C
LTC1443/LTC1444/LTC1445
3
144345fe
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION
SPECIFIED
TEMPERATURE RANGE
LTC1443CN#PBF LTC1443CN#TRPBF LTC1443CN 16-Lead PDIP 0°C to 70°C
LTC1443CS#PBF LTC1443CS#TRPBF LTC1443CS 16-Lead Plastic SO 0°C to 70°C
LTC1443IN#PBF LTC1443IN#TRPBF LTC1443IN 16-Lead PDIP –40°C to 85°C
LTC1443IS#PBF LTC1443IS#TRPBF LTC1443IS 16-Lead Plastic SO –40°C to 85°C
LTC1444CN#PBF LTC1444CN#TRPBF LTC1444CN 16-Lead PDIP 0°C to 70°C
LTC1444CS#PBF LTC1444CS#TRPBF LTC1444CS 16-Lead Plastic SO 0°C to 70°C
LTC1444IN#PBF LTC1444IN#TRPBF LTC1444IN 16-Lead PDIP –40°C to 85°C
LTC1444IS#PBF LTC1444IS#TRPBF LTC1444IS 16-Lead Plastic SO –40°C to 85°C
LTC1445CN#PBF LTC1445CN#TRPBF LTC1445CN 16-Lead PDIP 0°C to 70°C
LTC1445CS#PBF LTC1445CS#TRPBF LTC1445CS 16-Lead Plastic SO 0°C to 70°C
LTC1445IN#PBF LTC1445IN#TRPBF LTC1445IN 16-Lead PDIP –40°C to 85°C
LTC1445IS#PBF LTC1445IS#TRPBF LTC1445IS 16-Lead Plastic SO –40°C to 85°C
LTC1443CDHD#PBF LTC1443CDHD#TRPBF 1443 16-Lead (5mm × 4mm) Plastic DFN 0°C to 70°C
LTC1443IDHD#PBF LTC1443IDHD#TRPBF 1443 16-Lead (5mm × 4mm) Plastic DFN –40°C to 85°C
LTC1444CDHD#PBF LTC1444CDHD#TRPBF 1444 16-Lead (5mm × 4mm) Plastic DFN 0°C to 70°C
LTC1444IDHD
#PBF LTC1444IDHD#TRPBF
1444 16-Lead (5mm × 4mm) Plastic DFN –40°C to 85°C
LTC1445CDHD#PBF LTC1445CDHD#TRPBF 1445 16-Lead (5mm × 4mm) Plastic DFN 0°C to 70°C
LTC1445IDHD#PBF LTC1445IDHD#TRPBF 1445 16-Lead (5mm × 4mm) Plastic DFN –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LT C Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply
V
+
Supply Voltage Range
l
2.0 11.0 V
I
CC
Supply Current IN
+
= IN
–
= 80mV
HYST = REF (LTC1444/LTC1445)
l
5.5 8.5 µA
Comparator
V
OS
Comparator Input Offset Voltage V
CM
= 2.5V
l
±3.0 ±10.0 mV
I
IN
Input Leakage Current (IN
+
, IN
–
) V
IN
+
= V
IN
–
= 2.5V
l
±0.01 ±1.0 nA
Input Leakage Current (HYST) LTC1444/LTC1445
l
±0.02 ±1.0 nA
V
CM
Comparator Input Common Mode Range
l
V
–
V
+
– 1.3V V
CMRR Common Mode Rejection Ratio V
–
to (V
+
– 1.3V) 0.1 1.0 mV/V
PSRR Power Supply Rejection Ratio V
+
= 2V to 11V 0.1 1.0 mV/V
Noise Voltage Noise 100Hz to 100kHz 20 µV
RMS
V
HYST
Hysteresis Input Voltage Range LTC1444, LTC1445
l
REF – 50mV REF V
t
PD
Propagation Delay Overdrive = 10mV, C
OUT
= 100pF
Overdrive = 100mV, C
OUT
= 100pF
12
4
µs
µs
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 5V, V
–
= GND = 0V, unless otherwise noted.
elecTrical characTerisTics
P1-P3P4-P6P7-P9P10-P12P13-P14

LTC1444CDHD#PBF

Mfr. #:
Buy LTC1444CDHD#PBF
Manufacturer:
Analog Devices Inc.
Description:
Analog Comparators uP Quad COMPARATOR 1% 1.182V Ref Open Drain
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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