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LT6700-1/LT6700-2/LT6700-3
1
6700123fb
s
Battery-Powered System Monitoring
s
Threshold Detectors
s
Window Comparators
s
Relay Driving
s
Optoisolator Driving
s
Industrial Control Systems
s
Handheld Instruments
s
Low Quiescent Current: 6.5
A Typ at 5V
s
Wide Supply Range: 1.4V to 18V
s
400mV Reference
2% Accuracy Over Temperature
s
Input Range Includes Ground
s
Over-The-Top
Input Range
s
Over-The-Top Open-Collector Outputs
s
Internal Hysteresis: 6.5mV Typ
s
Low Input Bias Current:
10nA Max
s
40mA Typical Output Sink Current
s
Supports Wired-AND Connections
s
Choice of Input Polarities: LT6700-1/LT6700-2/
LT6700-3
s
Low Profile (1mm) SOT-23 (ThinSOT
TM
) Package
Micropower, Low Voltage,
SOT-23, Dual Comparator
with 400mV Reference
, LTC and LT are registered trademarks of Linear Technology Corporation.
The LT
6700-1/LT6700-2/LT6700-3 combine two mi-
cropower, low voltage comparators with a 400mV refer-
ence in the 6-lead SOT-23 package. Operating with supplies
from 1.4V up to 18V, the devices draw only 6.5
A typical,
making them ideal for low voltage system monitoring.
Hysteresis is included in the comparators, easing design
requirements to insure stable output operation.
The comparators each have one input available externally,
the other inputs are connected internally to the reference.
The comparator outputs are open collector and the output
load can be referred to any voltage up to 18V, independent
of supply voltage. The output stage sinking capability is
guaranteed greater than 5mA over temperature.
The three versions of the part differ by the polarity of the
available comparator inputs. The LT6700-1 has one in-
verting input and one noninverting input, making it suit-
able for use as a window comparator. The LT6700-2 has
two inverting inputs and the LT6700-3 has two noninvert-
ing inputs. All versions are offered in commercial, indus-
trial and automotive temperature ranges.
+
+
COMP B
1M
COMP A
ALKALINE
AA CELLS
V
R
= 400mV
REFERENCE
5
6
4
3
1
2
0.1
F
1M
LT6700-3
63.4k
261k
1M
V
BATT
> 1.6V
V
BATT
> 2V
MONITOR CONSUMES ~10
A
HYSTERESIS IS APPROXIMATELY
2% OF TRIP VOLTAGE
6700123 TA01
V
BATT
1.4V (MIN)
3V (NOM)
+
+
V
S
Over-The-Top is a registered trademark of Linear Technology.
ThinSOT is a trademark of Linear Technology Corporation.
Comparator Thresholds
vs Temperature
TEMPERATURE (
C)
60
THRESHOLD VOLTAGE (mV)
398
400
402
120
6700123 TA02
396
394
390
40 20
0
20
40
60
80 100
392
406
404
TWO TYPICAL PARTS
COMP A AND B
V
S
= 5V
#1A
#1B
#2A
#2B
RISING INPUT
FALLING INPUT
Micropower Battery Monitor
DESCRIPTIO
U
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
LT6700-1/LT6700-2/LT6700-3
2
6700123fb
Total Supply Voltage (V
S
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)
LT6700CS6-1/-2/-3 ............................ 40
C to 85
C
LT6700IS6-1/-2/-3 ............................. 40
C to 85
C
LT6700HS6-1/-2/-3 .......................... 40
C to 125
C
ORDER PART
NUMBER
S6 PART
MARKING*
T
JMAX
= 150
C,
JA
= 230
C/W
LT6700CS6-1
LT6700IS6-1
LT6700HS6-1
(Note 1)
ABSOLUTE AXI U RATI GS
W
W
W
U
PACKAGE/ORDER I FOR ATIO
U
U
W
*The temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges.
Specified Temperature Range (Note 5)
LT6700CS6-1/-2/-3 ............................ 40
C to 85
C
LT6700IS6-1/-2/-3 ............................. 40
C to 85
C
LT6700HS6-1/-2/-3 .......................... 40
C to 125
C
Maximum Junction Temperature ......................... 150
C
Storage Temperature Range ................... 65
C to 150
Lead Temperature (Soldering, 10 sec).................. 300
C
LTK7
OUTA 1
GND 2
+INA 3
6 OUTB
5 V
S
4 INB
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
ORDER PART
NUMBER
S6 PART
MARKING*
T
JMAX
= 150
C,
JA
= 230
C/W
LT6700CS6-2
LT6700IS6-2
LT6700HS6-2
LTADL
ORDER PART
NUMBER
S6 PART
MARKING*
T
JMAX
= 150
C,
JA
= 230
C/W
LT6700CS6-3
LT6700IS6-3
LT6700HS6-3
LTADM
OUTA 1
GND 2
INA 3
6 OUTB
5 V
S
4 INB
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
OUTA 1
GND 2
+INA 3
6 OUTB
5 V
S
4 +INB
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
A
= 25
C, unless otherwise specified.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
TH(R)
Rising Input Threshold Voltage
R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V
394
400
406
mV
V
S
= 5V
395
400
405
mV
V
S
= 12V
393
400
407
mV
V
S
= 18V
392
400
408
mV
V
TH(F)
Falling Input Threshold Voltage
R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V
386
393.5
401
mV
V
S
= 5V
387
393.5
400
mV
V
S
= 12V
385
393.5
402
mV
V
S
= 18V
384
393.5
403
mV
HYS
HYS = V
TH(R)
V
TH(F)
V
S
= 1.4V, 5V, 12V, 18V, R
L
= 100k, V
O
= 2V Swing
3.5
6.5
9.5
mV
LT6700-1/LT6700-2/LT6700-3
3
6700123fb
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
TH(R)
Rising Input Threshold Voltage
R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V
q
391.0
409.0
mV
V
S
= 5V
q
392.5
407.5
mV
V
S
= 12V
q
390.0
410.0
mV
V
S
= 18V
q
389.0
411.0
mV
V
TH(F)
Falling Input Threshold Voltage
R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V
q
383.5
403.5
mV
V
S
= 5V
q
384.5
402.5
mV
V
S
= 12V
q
382.5
404.5
mV
V
S
= 18V
q
381.5
405.5
mV
HYS
HYS = V
TH(R)
V
TH(F)
V
S
= 1.4V, 5V, 12V, 18V, R
L
= 100k, V
O
= 2V Swing
q
3
11
mV
I
B
Input Bias Current
V
S
= 1.4V, 18V, V
IN
= V
S
q
15
nA
V
S
= 1.4V, V
IN
= 18V
q
15
nA
V
S
= 1.4V, 18V, V
IN
= 0.1V
q
15
nA
V
OL
Output Low Voltage
10mV Input Overdrive
V
S
= 1.4V, I
OUT
= 0.5mA
q
250
mV
V
S
= 1.6V, I
OUT
= 3mA
q
250
mV
V
S
= 5V, I
OUT
= 5mA
q
250
mV
I
OFF
Output Leakage Current
V
S
= 1.4V, 18V, V
OUT
= V
S
, V
IN
= 40mV Overdrive
q
1
A
V
S
= 1.4V, V
OUT
= 18V, V
IN
= 40mV Overdrive
q
1
A
I
S
Supply Current
No Load Current
V
S
= 1.4V
q
13.0
A
V
S
= 5V
q
14.0
A
V
S
= 12V
q
15.5
A
V
S
= 18V
q
16.0
A
T
A
= 25
C, unless otherwise specified.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I
B
Input Bias Current
V
S
= 1.4V, 18V, V
IN
= V
S
0.01
10
nA
V
S
= 1.4V, V
IN
= 18V
0.01
10
nA
V
S
= 1.4V, 18V, V
IN
= 0.1V
4
10
nA
V
OL
Output Low Voltage
10mV Input Overdrive
V
S
= 1.4V, I
OUT
= 0.5mA
55
200
mV
V
S
= 1.6V, I
OUT
= 3mA
60
200
mV
V
S
= 5V, I
OUT
= 5mA
70
200
mV
I
OFF
Output Leakage Current
V
S
= 1.4V, 18V, V
OUT
= V
S
, V
IN
= 40mV Overdrive
0.01
0.8
A
V
S
= 1.4V, V
OUT
= 18V, V
IN
= 40mV Overdrive
0.01
0.8
A
t
PD(HL)
High-to-Low Propagation Delay
V
S
= 5V, 10mV Input Overdrive, R
L
= 10k,
29
s
V
OL
= 400mV
t
PD(LH)
Low-to-High Propagation Delay
V
S
= 5V, 10mV Input Overdrive, R
L
= 10k,
18
s
V
OH
= 0.9 V
S
t
r
Output Rise Time
V
S
= 5V, 10mV Input Overdrive, R
L
= 10k
2.2
s
V
O
= (0.1 to 0.9) V
S
t
f
Output Fall Time
V
S
= 5V, 10mV Input Overdrive, R
L
= 10k
0.22
s
V
O
= (0.1 to 0.9) V
S
I
S
Supply Current
No Load Current
V
S
= 1.4V
5.7
10.0
A
V
S
= 5V
6.5
11.0
A
V
S
= 12V
6.9
12.5
A
V
S
= 18V
7.1
13.0
A
The
q
denotes the specifications which apply over the temperature range of 0
C
T
A
70
C, unless otherwise specified (Notes 4, 5).
LT6700-1/LT6700-2/LT6700-3
4
6700123fb
The
q
denotes the specifications which apply over the temperature range of
40
C
T
A
85
C, unless otherwise specified (Notes 4, 5).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
TH(R)
Rising Input Threshold Voltage
R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V
q
390
410
mV
V
S
= 5V
q
392
408
mV
V
S
= 12V
q
389
411
mV
V
S
= 18V
q
388
412
mV
V
TH(F)
Falling Input Threshold Voltage
R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V
q
382.5
404.5
mV
V
S
= 5V
q
383.5
403.5
mV
V
S
= 12V
q
381.5
405.5
mV
V
S
= 18V
q
380.5
406.5
mV
HYS
HYS = V
TH(R)
V
TH(F)
V
S
= 1.4V, 5V, 12V, 18V, R
L
= 100k, V
O
= 2V Swing
q
2
11.5
mV
I
B
Input Bias Current
V
S
= 1.4V, 18V, V
IN
= V
S
q
15
nA
V
S
= 1.4V, V
IN
= 18V
q
15
nA
V
S
= 1.4V, 18V, V
IN
= 0.1V
q
15
nA
V
OL
Output Low Voltage
10mV Input Overdrive
V
S
= 1.4V, I
OUT
= 0.1mA
q
250
mV
V
S
= 1.6V, I
OUT
= 3mA
q
250
mV
V
S
= 5V, I
OUT
= 5mA
q
250
mV
I
OFF
Output Leakage Current
V
S
= 1.4V, 18V, V
OUT
= V
S
, V
IN
= 40mV Overdrive
q
1
A
V
S
= 1.4V, V
OUT
= 18V, V
IN
= 40mV Overdrive
q
1
A
I
S
Supply Current
No Load Current
V
S
= 1.4V
q
14.0
A
V
S
= 5V
q
15.0
A
V
S
= 12V
q
16.5
A
V
S
= 18V
q
17.0
A
ELECTRICAL CHARACTERISTICS
The
q
denotes the specifications which apply over the temperature range of 40
C
T
A
125
C, unless otherwise specified (Notes 4, 5).
LT6700H
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
TH(R)
Rising Input Threshold Voltage
R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V
q
390
411
mV
V
S
= 5V
q
392
410
mV
V
S
= 12V
q
389
412
mV
V
S
= 18V
q
388
413
mV
V
TH(F)
Falling Input Threshold Voltage
R
L
= 100k, V
O
= 2V Swing
V
S
= 1.4V
q
381.5
405.5
mV
V
S
= 5V
q
382.5
404.5
mV
V
S
= 12V
q
380.5
406.5
mV
V
S
= 18V
q
379.5
407.5
mV
HYS
HYS = V
TH(R)
V
TH(F)
V
S
= 1.4V, 5V, 12V, 18V, R
L
= 100k, V
O
= 2V Swing
q
2
13.5
mV
I
B
Input Bias Current
V
S
= 1.4V, 18V, V
IN
= V
S
q
45
nA
V
S
= 1.4V, V
IN
= 18V
q
45
nA
V
S
= 1.4V, 18V, V
IN
= 100mV
q
50
nA
V
OL
Output Low Voltage
10mV Input Overdrive
V
S
= 1.4V, I
OUT
= 0.1mA
q
250
mV
V
S
= 1.6V, I
OUT
= 3mA
q
250
mV
V
S
= 5V, I
OUT
= 5mA
q
250
mV
I
OFF
Output Leakage Current
V
S
= 1.4V, 18V, V
OUT
= V
S
, V
IN
= 40mV Overdrive
q
1
A
V
S
= 1.4V, V
OUT
= V
S
, V
IN
= 40mV Overdrive
q
1
A
I
S
Supply Current
No Load Current
V
S
= 1.4V
q
16.0
A
V
S
= 5V
q
17.0
A
V
S
= 12V
q
18.5
A
V
S
= 18V
q
19.0
A
LT6700-1/LT6700-2/LT6700-3
5
6700123fb
U
U
U
PI FU CTIO S
+
+
COMP B
COMP A
400mV
REFERENCE
OUTB
V
S
INB
+INA
OUTA
GND
V
S
LT6700-1
6700123 PF01
5
4
6
3
1
2
OUTA (Pin 1): Open-Collector Output of Comparator Sec-
tion A. This pin provides drive for up to 40mA of load
current. Off-state voltage may be as high as 18V above
GND (Pin 2), regardless of V
S
used.
GND (Pin 2): Ground. This pin is also the low side return
of the internal 400mV reference.
INA (Pin 3): External Input for Comparator Section A. The
voltage on this pin can range from 0.3V to 18V with
respect to GND (Pin 2) regardless of V
S
used. The input is
noninverting for the LT6700-1 and LT6700-3, and invert-
ing for the LT6700-2. The other section A comparator
input is internally connected to the 400mV reference.
INB (Pin 4): External Input for Comparator Section B. The
voltage on this pin can range from 0.3V to 18V with
respect to GND (Pin 2) regardless of V
S
used. The input is
noninverting for the LT6700-3, and inverting for the
LT6700-1 and LT6700-2. The other section B comparator
input is internally connected to the 400mV reference.
V
S
(Pin 5): Comparator Core Supply Voltage. The parts are
characterized for operation with 1.4V
V
S
18V with
respect to GND (Pin 2).
OUTB (Pin 6): Open-Collector Output of Comparator Sec-
tion B. This pin provides drive for up to 40mA of load
current. Off-state voltage may be as high as 18V above
GND (Pin 2), regardless of V
S
used.
+
+
COMP B
COMP A
400mV
REFERENCE
OUTB
V
S
INB
INA
OUTA
GND
V
S
LT6700-2
6700123 PF02
5
4
6
3
1
2
+
+
COMP B
COMP A
400mV
REFERENCE
OUTB
V
S
+INB
+INA
OUTA
GND
V
S
LT6700-3
6700123 PF03
5
4
6
3
1
2
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those beyond which the life of the
device may be impaired.
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. If the input
voltage exceeds 0.3V below ground, the input current should be limited
to less than 10mA.
Note 4: The LT6700CS6-1/-2/-3 and LT6700IS6-1/-2/-3 are guaranteed
functional over the operating temperature range of 40
C to 85
C. The
LT6700HS6-1/-2/-3 are guaranteed functional over the operating
temperature range of 40
C to 125
C.
Note 5: The LT6700CS6-1/-2/-3 are guaranteed to meet the specified
performance from 0
C to 70
C. The LT6700CS6-1/-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
LT6700IS6-1/-2/-3 are guaranteed to meet specified performance from
40
C to 85
C. The LT6700HS6-1/-2/-3 are guaranteed to meet specified
performance from 40
C to 125
C.
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