FEATURES
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LT6703-2/LT6703-3
Micropower, Low Voltage
Comparator with
400mV Reference
DESCRIPTION
The LT
®
6703-2/LT6703-3 combine a micropower, low
voltage comparator with a 400mV reference in a tiny DFN
package. Operating with supplies from 1.4V up to 18V,
these devices draw only 6.5μA, making them ideal for
low voltage system monitoring. Hysteresis is included in
the comparator, ensuring stable operation.
The comparator has one input available externally while
the other input is connected internally to the reference. The
comparator output is open collector and the output load
can be referred to any voltage up to 18V independent of
supply voltage. The output stage has a guaranteed current
sink capability of more than 5mA over temperature.
The two versions of this part differ by the polarity of the
available comparator input. The LT6703-2 has an inverting
input and the LT6703-3 has a noninverting input. Both
versions are offered in commercial, industrial and automo-
tive temperature ranges.
, LT, LTC, LTM and Over-The-Top are registered trademarks of Linear Technology
Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Internal 400mV Reference
Total Threshold Error: ± 1.25% Max at 25°C
Wide Supply Range: 1.4V to 18V
Specified for –40 to 125°C Temperature Range
Low Quiescent Current: 6.5μA Typ at 5V
Internal Hysteresis: 6.5mV Typ
Low Input Bias Current: ±10nA Max
Over-The-Top
®
Input also Includes Ground
Open-Collector Output Allows Level Translation
Choice of Input Polarities: LT6703-2/LT6703-3
Available in a 2mm
×
2mm DFN Package
APPLICATIONS
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Battery-Powered System Monitoring
Threshold Detectors
Window Comparators
Relay Driving
Optoisolator Driving
Industrial Control Systems
Handheld Instruments
TYPICAL APPLICATION
Micropower Supply Voltage Monitor
1.4V
≤
V
IN
≤
18V
(V
TH
= 3V)
Rising Input Threshold Voltage vs Temperature
RISING INPUT THRESHOLD VOLTAGE (mV)
404
403
402
401
400
399
398
397
#4
#2
#1
FOUR TYPICAL PARTS
V
S
= 5V
1MΩ
LT6703-3
+IN
V
S
1MΩ
+
OUT
#3
0.1μF
154k
–
400mV
REFERENCE
GND
V
S
670323 TA01
396
–60 –40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
670323 G04
670323fa
1
LT6703-2/LT6703-3
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage (VS to GND) ..........................18.5V
Input Voltage (+IN, –IN)
(Note 3)....................................... 18.5V to (GND – 0.3V)
Output Voltage (OUT).................. 18.5V to (GND – 0.3V)
Output Short-Circuit Duration (Note 2) ............ Indefinite
Input Current (Note 3)..........................................–10mA
Operating Temperature Range (Note 4)
LT6703C-2/-3 ...................................... –40°C to 85°C
LT6703I-2/-3 ....................................... –40°C to 85°C
LT6703H-2/-3 ................................... –40°C to 125°C
Specified Temperature Range (Note 5)
LT6703C-2/-3 ..................................... –40°C to 85°C
LT6703I-2/-3 ....................................... –40°C to 85°C
LT6703H-2/-3 .................................. –40°C to 125°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
4
4
1
OUT
2
V
S
3
–IN
1
OUT
2
V
S
3
+IN
DC PACKAGE
3-LEAD (2mm
×
2mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 102°C/W
EXPOSED PAD (PIN 4) IS GND, MUST BE SOLDERED TO PCB
LT6703-2
DC PACKAGE
3-LEAD (2mm
×
2mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 102°C/W
EXPOSED PAD (PIN 4) IS GND, MUST BE SOLDERED TO PCB
LT6703-3
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL (MINI)
LT6703CDC-2#TRMPBF
LT6703IDC-2#TRMPBF
LT6703HDC-2#TRMPBF
LT6703CDC-3#TRMPBF
LT6703IDC-3#TRMPBF
LT6703HDC-3#TRMPBF
TAPE AND REEL
LT6703CDC-2#TRPBF
LT6703IDC-2#TRPBF
LT6703HDC-2#TRPBF
LT6703CDC-3#TRPBF
LT6703IDC-3#TRPBF
LT6703HDC-3#TRPBF
PART MARKING*
LCWP
LCWP
LCWP
LCTW
LCTW
LCTW
PACKAGE DESCRIPTION
3-Lead (2mm
×
2mm) Plastic DFN
3-Lead (2mm
×
2mm) Plastic DFN
3-Lead (2mm
×
2mm) Plastic DFN
3-Lead (2mm
×
2mm) Plastic DFN
3-Lead (2mm
×
2mm) Plastic DFN
3-Lead (2mm
×
2mm) Plastic DFN
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
TRM = 500 pieces.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on lead based finish parts.
*Temperature grades are identified by a label on the shipping container.
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/
670323fa
2
LT6703-2/LT6703-3
ELECTRICAL CHARACTERISTICS
SYMBOL
V
TH(R)
V
TH(F
)
HYS
I
B
PARAMETER
Rising Input Threshold Voltage (Note 6)
HYS = V
TH(R)
– V
TH(F)
Input Bias Current
T
A
= 25°C, unless otherwise specified.
MIN
395
387
3.5
TYP
400
393.5
6.5
±0.01
±0.01
±4
70
0.01
0.01
18
29
2.2
0.22
6.5
11.0
MAX
405
400
9.5
±10
±10
±10
200
0.8
0.8
UNITS
mV
mV
mV
nA
nA
nA
mV
μA
μA
μs
μs
μs
μs
μA
CONDITIONS
R
L
= 100k, V
O
= 2V Swing, V
S
= 5V
V
S
= 5V, R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V, 18V, V
IN
= V
S
V
S
= 1.4V, V
IN
= 18V
V
S
= 1.4V, 18V, V
IN
= 0.1V
10mV Input Overdrive, V
S
= 5V, I
OUT
= 5mA
V
S
= 1.4V, 18V, V
OUT
= V
S
, V
IN
= 40mV Overdrive
V
S
= 1.4V, V
OUT
= 18V, V
IN
= 40mV Overdrive
V
S
= 5V, 10mV Input Overdrive, R
L
= 10k,
V
OL
= 400mV
V
S
= 5V, 10mV Input Overdrive, R
L
= 10k,
V
OH
= 0.9 • V
S
V
S
= 5V, 10mV Input Overdrive, R
L
= 10k
V
O
= (0.1 to 0.9) • V
S
V
S
= 5V, 10mV Input Overdrive, R
L
= 10k
V
O
= (0.1 to 0.9) • V
S
No Load Current, V
S
= 5V
Falling Input Threshold Voltage (Note 6) R
L
= 100k, V
O
= 2V Swing, V
S
= 5V
V
OL
I
OFF
t
PD(HL)
t
PD(LH)
t
r
t
f
I
S
Output Low Voltage
Output Leakage Current
High-to-Low Propagation Delay
Low-to-High Propagation Delay
Output Rise Time
Output Fall Time
Supply Current
The
●
denotes the specifications which apply over the temperature range of 0°C ≤ T
A
≤ 70°C, (LT6703C-2/LT6703C-3) unless otherwise
specified (Notes 4, 5).
SYMBOL
V
TH(R)
V
TH(F)
HYS
I
B
PARAMETER
Rising Input Threshold Voltage (Note 6)
HYS = V
TH(R)
– V
TH(F)
Input Bias Current
CONDITIONS
R
L
= 100k, V
O
= 2V Swing, V
S
= 5V
V
S
= 5V, R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V, 18V, V
IN
= V
S
V
S
= 1.4V, V
IN
= 18V
V
S
= 1.4V, 18V, V
IN
= 0.1V
10mV Input Overdrive, V
S
= 5V, I
OUT
= 5mA
V
S
= 1.4V, 18V, V
OUT
= V
S
, V
IN
= 40mV Overdrive
V
S
= 1.4V, V
OUT
= 18V, V
IN
= 40mV Overdrive
No Load Current, V
S
= 5V
●
●
●
●
●
●
●
●
●
●
MIN
392.5
384.5
3
TYP
MAX
407.5
402.5
11
±15
±15
±15
250
1
1
14.0
UNITS
mV
mV
mV
nA
nA
nA
mV
μA
μA
μA
Falling Input Threshold Voltage (Note 6) R
L
= 100k, V
O
= 2V Swing, V
S
= 5V
V
OL
I
OFF
I
S
Output Low Voltage
Output Leakage Current
Supply Current
The
●
denotes the specifications which apply over the temperature range of –40°C ≤ T
A
≤ 85°C, (LT6703I-2/LT6703I-3) unless otherwise
specified (Notes 4, 5).
SYMBOL
V
TH(R)
V
TH(F)
HYS
I
B
PARAMETER
Rising Input Threshold Voltage (Note 6)
HYS = V
TH(R)
– V
TH(F)
Input Bias Current
CONDITIONS
R
L
= 100k, V
O
= 2V Swing, V
S
= 5V
V
S
= 5V, R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V, 18V, V
IN
= V
S
V
S
= 1.4V, V
IN
= 18V
V
S
= 1.4V, 18V, V
IN
= 0.1V
10mV Input Overdrive, V
S
= 5V, I
OUT
= 5mA
V
S
= 1.4V, 18V, V
OUT
= V
S
, V
IN
= 40mV Overdrive
V
S
= 1.4V, V
OUT
= 18V, V
IN
= 40mV Overdrive
No Load Current, V
S
= 5V
●
●
●
●
●
●
●
●
●
●
MIN
392
383.5
2
TYP
MAX
408
403.5
11.5
±15
±15
±15
250
1
1
15.0
UNITS
mV
mV
mV
nA
nA
nA
mV
μA
μA
μA
670323fa
Falling Input Threshold Voltage (Note 6) R
L
= 100k, V
O
= 2V Swing, V
S
= 5V
V
OL
I
OFF
I
S
Output Low Voltage
Output Leakage Current
Supply Current
3
LT6703-2/LT6703-3
ELECTRICAL CHARACTERISTICS
The
●
denotes the specifications which apply over the temperature range of –40°C ≤ T
A
≤ 125°C, (LT6703H-2/LT6703H-3) unless
otherwise specified (Notes 4, 5).
SYMBOL
V
TH(R)
V
TH(F)
HYS
I
B
PARAMETER
Rising Input Threshold Voltage (Note 6)
HYS = V
TH(R)
– V
TH(F)
Input Bias Current
CONDITIONS
R
L
= 100k, V
O
= 2V Swing, V
S
= 5V
V
S
= 5V, R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V, 18V, V
IN
= V
S
V
S
= 1.4V, V
IN
= 18V
V
S
= 1.4V, 18V, V
IN
= 0.1V
10mV Input Overdrive, V
S
= 5V, I
OUT
= 5mA
V
S
= 1.4V, 18V, V
OUT
= V
S
, V
IN
= 40mV Overdrive
V
S
= 1.4V, V
OUT
= 18V, V
IN
= 40mV Overdrive
No Load Current, V
S
= 5V
●
●
●
●
●
●
●
●
●
●
MIN
392
382.5
2
TYP
MAX
410
404.5
13.5
±45
±45
±50
250
1
1
17.0
UNITS
mV
mV
mV
nA
nA
nA
mV
μA
μA
μA
Falling Input Threshold Voltage (Note 6) R
L
= 100k, V
O
= 2V Swing, V
S
= 5V
V
OL
I
OFF
I
S
Output Low Voltage
Output Leakage Current
Supply Current
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefinitely.
Note 3:
The inputs are protected by ESD diodes to the ground pin. If the
input voltage exceeds –0.3V below ground, the input current should be
limited to less than 10mA.
Note 4:
The LT6703C-2/-3, and LT6703I-2/-3 are guaranteed functional
over the operating temperature range of –40°C to 85°C.
The LT6703H-2/-3, is guaranteed functional over the operating
temperature range of –40°C to 125°C.
Note 5:
The LT6703C-2/-3, are guaranteed to meet the specified
performance from 0°C to 70°C. The LT6703C-2/-3 are designed,
characterized and expected to meet specified performance from –40°C
to 85°C but are not tested or QA sampled at these temperatures. The
LT6703I-2/-3, are guaranteed to meet specified performance from –40°C
to 85°C. The LT6703H-2/-3, is guaranteed to meet specified performance
from –40°C to 125°C.
Note 6:
V
TH
defines the threshold voltage of the comparator and combines
the effect of offset and reference accuracy.
670323fa
4
LT6703-2/LT6703-3
PIN FUNCTIONS
V
S
LT6703-2
–IN
LT6703-3
+IN
OUT
V
S
–
+
400mV
REFERENCE
V
S
+
OUT
–
400mV
REFERENCE
670323 PF02
V
S
670323 PF03
GND
GND
OUT:
Open-Collector Output of Comparator. This pin
provides drive for up to 40mA of load current. Off-state
voltage may be as high as 18V above GND, regardless of
V
S
used.
GND:
Ground. This pin is also the low side return of the
internal 400mV reference.
IN:
External Input for Comparator. The voltage on this pin
can range from –0.3V to 18V with respect to GND regardless
of V
S
used. The input is noninverting for the LT6703-3, and
inverting for the LT6703-2. The other comparator input is
internally connected to the 400mV reference.
V
S
:
Supply Voltage. The parts are characterized for opera-
tion with 1.4V ≤ V
S
≤ 18V with respect to GND.
670323fa
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