LT6703CDC-3-TRPBF [Linear]
Micropower, Low Voltage Comparator with 400mV Reference; 微功耗，低电压比较器具有400mV基准
| 型号： | LT6703CDC-3-TRPBF |
| 厂家： | 
Linear |
| 描述： | Micropower, Low Voltage Comparator with 400mV Reference |
| 文件： | 总12页 (文件大小：164K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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.
FEATURES
■
Internal 400mV Reference
■
Total Threshold Error: ꢀ1.25 Maꢁ at .2ꢂ°
■
Wide Supply Range: ꢀ14V to ꢀ8V
■
Specified for –40 to ꢀ.2ꢂ° Temperature Range
■
Low Quiescent Current: 6.5μA Typ at 5V
■
Internal Hysteresis: 6.5mV Typ
■
Low Input Bias Current: 10nA Max
The comparator has one input available externally while
theotherinputisconnectedinternallytothereference.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.
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
The two versions of this part differ by the polarity of the
availablecomparatorinput.TheLT6703-2hasaninverting
input and the LT6703-3 has a noninverting input. Both
versionsareofferedincommercial,industrialandautomo-
tive temperature ranges.
■
Battery-Powered System Monitoring
■
Threshold Detectors
■
Window Comparators
■
Relay Driving
Optoisolator Driving
Industrial Control Systems
■
, 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.
■
■
Handheld Instruments
TYPICAL APPLICATION
Micropower Supply Voltage Monitor
Rising Input Threshold Voltage vs Temperature
1.4V ≤ V ≤ 18V
IN
404
(V = 3V)
TH
FOUR TYPICAL PARTS
V
= 5V
S
403
402
401
400
399
398
397
396
#1
#2
1MΩ
1MΩ
V
S
LT6703-3
+IN
+
#3
OUT
0.1μF
–
#4
0
154k
V
S
400mV
REFERENCE
20 40 60 80
–60 –40 –20
100 120
GND
670323 TA01
TEMPERATURE (°C)
670323 G04
670323fa
1
LT6703-2/LT6703-3
ABSOLUTE MAXIMUM RATINGS
(Note ꢀ)
LT6703I-2/-3 ....................................... –40°C to 85°C
LT6703H-2/-3 ................................... –40°C to 125°C
Specified Temperature Range (Note 5)
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
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
LT6703C-2/-3 ...................................... –40°C to 85°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
4
4
1
3
3
2
1
2
DC PACKAGE
DC PACKAGE
3-LEAD (2mm × 2mm) PLASTIC DFN
3-LEAD (2mm × 2mm) PLASTIC DFN
T
= 125°C, θ = 102°C/W
JA
EXPOSED PAD (PIN 4) IS GND, MUST BE SOLDERED TO PCB
LT6703-2
T
= 125°C, θ = 102°C/W
JA
EXPOSED PAD (PIN 4) IS GND, MUST BE SOLDERED TO PCB
LT6703-3
JMAX
JMAX
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL (MINI) TAPE AND REEL
PART MARKING*
LCWP
LCWP
LCWP
LCTW
PA°KAGE DES°RIPTION
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
LT6703CDC-2#TRMPBF LT6703CDC-2#TRPBF
LT6703IDC-2#TRMPBF
LT6703HDC-2#TRMPBF LT6703HDC-2#TRPBF
LT6703CDC-3#TRMPBF LT6703CDC-3#TRPBF
LT6703IDC-3#TRMPBF
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
LT6703IDC-2#TRPBF
LT6703IDC-3#TRPBF
LCTW
LCTW
–40°C to 85°C
–40°C to 125°C
LT6703HDC-3#TRMPBF LT6703HDC-3#TRPBF
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 TA = .2ꢂ°, unless otherwise specified1
SYMBOL
PARAMETER
°ONDITIONS
MIN
395
387
3.5
TYP
400
MAX
405
400
9.5
UNITS
mV
V
V
Rising Input Threshold Voltage (Note 6) R = 100k, V = 2V Swing, V = 5V
TH(R)
L
O
S
)
Falling Input Threshold Voltage (Note 6) R = 100k, V = 2V Swing, V = 5V
393.5
6.5
mV
TH(F
L
O
S
HYS
HYS = V
– V
V = 5V, R = 100k, V = 2V Swing
mV
TH(R)
TH(F)
S
L
O
I
Input Bias Current
V = 1.4V, 18V, V = V
S
0.01
0.01
4
10
10
10
nA
nA
nA
B
S
IN
V = 1.4V, V = 18V
S
IN
V = 1.4V, 18V, V = 0.1V
S
IN
V
Output Low Voltage
10mV Input Overdrive, V = 5V, I = 5mA
OUT
70
200
mV
OL
S
I
t
t
t
t
I
Output Leakage Current
V = 1.4V, 18V, V
= V , V = 40mV Overdrive
0.01
0.01
0.8
0.8
μA
μA
OFF
S
OUT
S
IN
V = 1.4V, V
= 18V, V = 40mV Overdrive
IN
S
OUT
High-to-Low Propagation Delay
Low-to-High Propagation Delay
Output Rise Time
V = 5V, 10mV Input Overdrive, R = 10k,
18
μs
μs
μs
μs
μA
PD(HL)
S
OL
L
V
= 400mV
V = 5V, 10mV Input Overdrive, R = 10k,
29
PD(LH)
S
OH
L
V
= 0.9 • V
S
V = 5V, 10mV Input Overdrive, R = 10k
2.2
0.22
6.5
r
S
L
V = (0.1 to 0.9) • V
O
S
Output Fall Time
V = 5V, 10mV Input Overdrive, R = 10k
S L
f
V = (0.1 to 0.9) • V
O
S
Supply Current
No Load Current, V = 5V
11.0
S
S
The ● denotes the specifications which apply over the temperature range of 0ꢂ° ≤ TA ≤ 70ꢂ°, (LT6703°-./LT6703°-3) unless otherwise
specified (Notes 4, 2)1
SYMBOL
PARAMETER
°ONDITIONS
MIN
392.5
384.5
3
TYP
MAX
407.5
402.5
11
UNITS
mV
●
●
●
V
TH(R)
V
TH(F)
Rising Input Threshold Voltage (Note 6) R = 100k, V = 2V Swing, V = 5V
L
O
S
Falling Input Threshold Voltage (Note 6) R = 100k, V = 2V Swing, V = 5V
mV
L
O
S
HYS
HYS = V
– V
V = 5V, R = 100k, V = 2V Swing
mV
TH(R)
TH(F)
S
L
O
●
●
●
I
Input Bias Current
V = 1.4V, 18V, V = V
S
15
15
15
nA
nA
nA
B
S
IN
V = 1.4V, V = 18V
S
IN
V = 1.4V, 18V, V = 0.1V
S
IN
●
V
OL
Output Low Voltage
10mV Input Overdrive, V = 5V, I = 5mA
OUT
250
mV
S
●
●
I
Output Leakage Current
V = 1.4V, 18V, V
= V , V = 40mV Overdrive
1
1
μA
μA
OFF
S
OUT
S
IN
V = 1.4V, V
= 18V, V = 40mV Overdrive
IN
S
OUT
●
I
Supply Current
No Load Current, V = 5V
14.0
μA
S
S
The ● denotes the specifications which apply over the temperature range of –40ꢂ° ≤ TA ≤ 82ꢂ°, (LT6703I-./LT6703I-3) unless otherwise
specified (Notes 4, 2)1
SYMBOL
PARAMETER
°ONDITIONS
MIN
392
383.5
2
TYP
MAX
408
UNITS
mV
●
●
●
V
V
Rising Input Threshold Voltage (Note 6) R = 100k, V = 2V Swing, V = 5V
TH(R)
TH(F)
L
O
S
Falling Input Threshold Voltage (Note 6) R = 100k, V = 2V Swing, V = 5V
403.5
11.5
mV
L
O
S
HYS
HYS = V
– V
V = 5V, R = 100k, V = 2V Swing
mV
TH(R)
TH(F)
S
L
O
●
●
●
I
Input Bias Current
V = 1.4V, 18V, V = V
S
15
15
15
nA
nA
nA
B
S
IN
V = 1.4V, V = 18V
S
IN
V = 1.4V, 18V, V = 0.1V
S
IN
●
V
OL
Output Low Voltage
10mV Input Overdrive, V = 5V, I = 5mA
OUT
250
mV
S
●
●
I
Output Leakage Current
V = 1.4V, 18V, V
= V , V = 40mV Overdrive
1
1
μA
μA
OFF
S
OUT
S
IN
V = 1.4V, V
= 18V, V = 40mV Overdrive
IN
S
OUT
●
I
Supply Current
No Load Current, V = 5V
15.0
μA
S
S
670323fa
3
LT6703-2/LT6703-3
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the temperature range of –40ꢂ° ≤ TA ≤ ꢀ.2ꢂ°, (LT6703H-./LT6703H-3) unless
otherwise specified (Notes 4, 2)1
SYMBOL
PARAMETER
°ONDITIONS
MIN
392
382.5
2
TYP
MAX
410
UNITS
mV
●
●
●
V
Rising Input Threshold Voltage (Note 6) R = 100k, V = 2V Swing, V = 5V
TH(R)
TH(F)
L
O
S
V
Falling Input Threshold Voltage (Note 6) R = 100k, V = 2V Swing, V = 5V
404.5
13.5
mV
L
O
S
HYS
HYS = V
– V
V = 5V, R = 100k, V = 2V Swing
mV
TH(R)
TH(F)
S
L
O
●
●
●
I
Input Bias Current
V = 1.4V, 18V, V = V
S
45
45
50
nA
nA
nA
B
S
IN
V = 1.4V, V = 18V
S
IN
V = 1.4V, 18V, V = 0.1V
S
IN
●
V
OL
Output Low Voltage
10mV Input Overdrive, V = 5V, I = 5mA
OUT
250
mV
S
●
●
I
Output Leakage Current
V = 1.4V, 18V, V
= V , V = 40mV Overdrive
1
1
μA
μA
OFF
S
OUT
S
IN
V = 1.4V, V
= 18V, V = 40mV Overdrive
IN
S
OUT
●
I
Supply Current
No Load Current, V = 5V
17.0
μA
S
S
Note ꢀ: 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.
The LT6703H-2/-3, is guaranteed functional over the operating
temperature range of –40°C to 125°C.
Note 2: The LT6703C-2/-3, are guaranteed to meet the specified
performance from 0°C to 70°C. The LT6703C-2/-3 are designed,
Note .: 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.
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 defines the threshold voltage of the comparator and combines
TH
the effect of offset and reference accuracy.
Note 4: The LT6703C-2/-3, and LT6703I-2/-3 are guaranteed functional
over the operating temperature range of –40°C to 85°C.
670323fa
4
LT6703-2/LT6703-3
PIN FUNCTIONS
V
S
V
S
LT6703-2
LT6703-3
–IN
+IN
–
+
OUT
OUT
+
–
V
V
S
S
400mV
REFERENCE
400mV
REFERENCE
670323 PF03
670323 PF02
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
IN: External Input for Comparator. The voltage on this pin
canrangefrom–0.3Vto18VwithrespecttoGNDregardless
ofV used.TheinputisnoninvertingfortheLT6703-3,and
S
V used.
inverting for the LT6703-2. The other comparator input is
S
internally connected to the 400mV reference.
GND: Ground. This pin is also the low side return of the
internal 400mV reference.
V : Supply Voltage. The parts are characterized for opera-
S
tion with 1.4V ≤ V ≤ 18V with respect to GND.
S
670323fa
5
LT6703-2/LT6703-3
TYPICAL PERFORMANCE CHARACTERISTICS
Distribution of Rising Input
Threshold Voltage
Distribution of Falling Input
Threshold Voltage
Distribution of Hysteresis
18
16
14
12
10
8
18
16
14
12
10
8
20
18
16
14
12
10
8
V
T
= 5V
= 25°C
V
T
= 5V
= 25°C
V
T
= 5V
= 25°C
S
S
S
A
A
A
6
6
6
4
4
4
2
2
2
0
0
0
394
396
398
400
402
404
406
388
390
392
394
396
398
400
4
4.8
5.6
6.4
7.2
8
8.8
RISING INPUT THRESHOLD VOLTAGE (mV)
FALLING INPUT THRESHOLD VOLTAGE (mV)
HYSTERESIS (mV)
670323 G01
670323 G02
670323 G03
Rising Input Threshold Voltage
vs Temperature
Rising Input Threshold Voltage
vs Temperature
Rising Input Threshold Voltage
vs Supply Voltage
404
403
402
401
400
399
398
397
396
403.0
402.5
402.0
401.5
401.0
400.5
400.0
399.5
399.0
403.0
402.5
402.0
401.5
401.0
400.5
400.0
399.5
399.0
T
T
T
T
= 25°C
= 85°C
= 125°C
= –55°C
FOUR TYPICAL PARTS
S
V
V
V
V
= 1.4V
= 5V
= 12V
= 18V
A
A
A
A
S
S
S
S
V
= 5V
#1
#2
#3
#4
0
20 40 60 80
8
10 12
–60 –40 –20
100 120
2
4
6
14 16 18
0
20 40 60 80
100 120
–60 –40 –20
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
670323 G04
670323 G06
670323 G05
670323fa
6
LT6703-2/LT6703-3
TYPICAL PERFORMANCE CHARACTERISTICS
Hysteresis vs Temperature
Hysteresis vs Temperature
Hysteresis vs Supply Voltage
10
9
10
9
10
T
T
= 25°C
= 85°C
T
T
= 125°C
= –55°C
FOUR TYPICAL PARTS
V
S
V
S
V
S
V
S
= 1.4V
= 5V
= 12V
= 18V
A
A
A
A
V
= 5V
S
9
8
7
6
5
4
3
2
#1
#2
#3
#4
8
8
7
7
6
6
5
5
4
4
3
3
2
2
0
20 40 60 80
100 120
–60 –40 –20
0
20 40 60 80
8
10 12
–60 –40 –20
100 120
2
4
6
14 16 18
TEMPERATURE (°C)
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
670323 G07
670323 G08
670323 G09
Quiescent Supply °urrent
vs Supply Voltage
Minimum Supply Voltage
Start-Up Supply °urrent
1
0
50
40
30
20
10
0
10
9
T
T
= 25°C
= 85°C
T
T
= 125°C
= –55°C
T
T
T
T
= 25°C
= 85°C
= 125°C
= –55°C
A
A
A
A
A
A
A
A
NO LOAD CURRENT
–1
–2
–3
–4
–5
8
7
6
T
= 25°C
= 85°C
= 125°C
= –55°C
A
A
A
A
T
T
T
5
4
0.9
1.1
1.3
1.5
1.7
1.9
7.4 9.4 11.4
0.2
0.6
1.4 3.4 5.4
13.4 15.4 17.4
0
0.4
0.8 1.0 1.2 1.4
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
670323 G10
670323 G11
670323 G12
670323fa
7
LT6703-2/LT6703-3
TYPICAL PERFORMANCE CHARACTERISTICS
Supply °urrent
vs Output Sink °urrent
Supply °urrent
vs Output Sink °urrent
Supply °urrent
vs Output Sink °urrent
1000
100
10
1000
100
10
1000
100
10
T
= 25°C
T
= –40°C
T
= 85°C
A
A
A
V
= 1.4V
= 5V
= 12V
= 18V
V
V
V
V
= 1.4V
V
= 1.4V
= 5V
= 12V
= 18V
S
S
S
S
S
S
V
V
V
= 5V
= 12V
= 18V
V
V
V
S
S
S
S
S
S
1
1
1
0.001
0.01
0.1
1
10
100
0.001
0.01
0.1
1
10
100
0.001
0.01
0.1
1
10
100
OUTPUT SINK CURRENT (mA)
OUTPUT SINK CURRENT (mA)
OUTPUT SINK CURRENT (mA)
670323 G14
670323 G13
670323 G15
Below Ground Input Bias °urrent
Low Level Input Bias °urrent
High Level Input Bias °urrent
3
2
10000
1000
100
10
10
1
V
= 18V
CURRENT IS POSITIVE GOING
INTO THE DEVICE
S
CURRENT IS GOING INTO THE DEVICE
–0.3V < V < 0V
IN
T
T
T
T
= 25°C
A
A
A
A
1
= 85°C
= 125°C
= –55°C
0
–1
–2
–3
–4
–5
–6
–7
0.1
V
= 18V
IN
S
0V < V < 1V
V
V
= 18V
> 1V
S
IN
T
T
T
T
= 25°C
0.01
0.001
A
A
A
A
= 85°C
T
T
T
= 25°C
= 85°C
= 125°C
A
A
A
= 125°C
= –55°C
CURRENT IS GOING OUT OF THE DEVICE
–0.2 –0.1
INPUT VOLTAGE (V)
1
0.5 0.8 0.9
0.6 0.7
1
0
0.4
–0.3
0
0.1 0.2 0.3
1
3
5
7
9
11 13 15 17
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
670323 G16
670323 G18
670323 G17
670323fa
8
LT6703-2/LT6703-3
TYPICAL PERFORMANCE CHARACTERISTICS
Output Saturation Voltage
vs Output Sink °urrent
Output Saturation Voltage
vs Output Sink °urrent
Output Saturation Voltage
vs Output Sink °urrent
1000
1000
1000
T
= 85°C
T
= 25°C
A
T
= –40°C
A
A
V
= 1.4V
= 5V
V
= 1.4V
= 5V
S
V
V
V
V
= 1.4V
S
S
S
S
S
V
V
V
V
V
V
S
S
S
= 5V
= 12V
= 18V
S
S
S
= 12V
= 18V
= 12V
= 18V
100
100
100
10
0.001
10
0.001
10
0.001
0.01
0.1
1
10
100
0.01
0.1
1
10
100
0.01
0.1
1
10
100
OUTPUT SINK CURRENT (mA)
OUTPUT SINK CURRENT (mA)
OUTPUT SINK CURRENT (mA)
670323 G21
670323 G19
670323 G20
Output Short-°ircuit °urrent
Output Short-°ircuit °urrent
Output Leakage °urrent
10
1
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
T
= 25°C
A
V
S
V
S
V
S
V
S
= 1.4V
= 5V
= 12V
= 18V
0.1
0.01
V
S
= 5V
T
= 25°C
= 85°C
= 125°C
= –55°C
A
A
A
A
T
T
T
V
= 5V
S
T
= 25°C
A
A
A
A
T
T
T
= 85°C
= 125°C
= –55°C
0.001
8
10 12
0
2
4
6
14 16 18
0
2
4
6
8
10 12 14 16 18
8
10 12
0
2
4
6
14 16 18
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
670323 G24
670323 G23
670323 G22
Propagation Delay
vs Input Overdrive
Rise and Fall Times
vs Output Pull-Up Resistor
Noninverting and Inverting
°omparator Propagation Delay
100
10
60
50
40
30
20
10
0
V
C
T
= 5V
= 20pF
= 25°C
LH NONINV
HL NONINV
LH INV
T
= 25°C
S
L
A
A
V
O(NINV)
5V/DIV
DC
HL INV
V
O(INV)
5V/DIV
DC
RISE
FALL
1
V
IN
10mV/DIV
AC
0.1
0.01
670323 G27
20μs/DIV
V
T
R
= 5V
= 25°C
LOAD
S
A
= 10k CONNECTED TO V
S
0.1
1
10
100
1000
0
20
40
60
80
100
V
= 10mV OVER THE INPUT
IN(OVERDRIVE)
OUTPUT PULL-UP RESISTOR (kΩ)
VOLTAGE THRESHOLDS
INPUT OVERDRIVE (mV)
670323 G26
670323 G25
670323fa
9
LT6703-2/LT6703-3
APPLICATIONS INFORMATION
TheLT6703-2/LT6703-3devicesaremicropowercompara-
torswithabuilt-in400mVreference.Featuresincludewide
supplyvoltagerange(1.4Vto18V),Over-The-Topinputand
output range, 2% accurate rising input threshold voltage
and 6.5mV typical built-in hysteresis.
circuitry can be employed to increase effective hysteresis
ifdesired, butsuchcircuitrywillprovideanapparenteffect
on both the rising and falling input thresholds (the actual
internal thresholds remain unaffected).
°omparator Input
Internal Reference
The comparator input can range from ground to 18V,
regardless of the supply voltage used. The typical input
current for inputs well above the threshold (i.e., >800mV)
is a few pA leaking into the input. With decreasing input
voltage, a small bias current begins to be drawn out of
the input, reaching a few nA when at ground potential.
The input may be forced 100mV below ground without
causing an improper output, though some additional bias
current will begin to flow from the ESD input protection
diode. Inputs driven further negative than 100mV below
ground will not cause damage provided the current is
limited to 10mA.
Eachcomparatorhasoneinputavailableexternally.Thetwo
versions of the part differ by the polarity of the available
input(i.e.,invertingornoninverting).Theothercomparator
input is connected internally to the 400mV reference. The
risinginputthresholdvoltageofthecomparatorisdesigned
to be equal to that of the reference (i.e., ≈400mV). The
reference voltage is established with respect to the device
GND connection.
Hysteresis
Eachcomparatorhasbuilt-in6.5mV(typical)ofhysteresis
to simplify designs, to insure stable operation in the pres-
ence of noise at the inputs, and to reject supply rail noise
that might be induced by state change load transients. The
hysteresis is designed such that the falling input threshold
voltage is nominally 393.5mV. External positive feedback
°omparator Output
The comparator output is open collector and capable of
sinking 40mA typical. Load currents are directed out of
the GND pin of the part. The output off-state voltage may
range between –0.3V and 18V with respect to ground,
regardless of the supply voltage used. As with any open-
collector device, the outputs of multiple comparators may
be tied together to implement wire-AND logic functions.
R3
V
S
R4
R1
V
IN
+IN
LT6703-3
GND
OUT
V
OUT
Power Supplies
R2
The comparator circuitry operates from a single 1.4V
670323 F01
to 18V supply. A minimum 0.1μF bypass capacitor is
required between the V pin and GND. When an output
S
THRESHOLD EQUATIONS:
load is connected to the supply rail near the part and the
outputissinkingmorethan5mA,a1μFbypasscapacitoris
recommended. In instances where the supply is relatively
“soft” (such as with small batteries) and susceptible to
load steps, an additional 47Ω series decoupling resistor
can further improve isolation of supply transients from
1
1
1
V
(L TO H) = (400mV) • (R1) •
+
+
IN
(
(
)
R1 R2 R3
1
1
1
V • R1
S
V
(H TO L) = (393mV) • (R1) •
+
+
–
IN
)
(
)
R1 R2 R3 + R4
R3 + R4
Figure ꢀ1 Additional Hysteresis °ircuit
the V pin.
S
670323fa
10
LT6703-2/LT6703-3
PACKAGE DESCRIPTION
D° Package
3-Lead Plastic DFN (.mm × .mm)
(Reference LTC DWG # 05-08-1717 Rev Ø)
1.35 0.05
(2 SIDES)
1.00 0.05
(2 SIDES)
1.30 0.05
2.00 0.05
PACKAGE
OUTLINE
0.25 0.05
0.50 BSC
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
1.35 0.05
(2 SIDES)
R = 0.05
TYP
1.00 0.05
(2 SIDES)
2.00 0.10
(4 SIDES)
PIN 1 NOTCH
R = 0.20 OR
0.25 × 45°
CHAMFER
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
R = 0.115 TYP
3
1
0.40 0.05
0.70 0.05
0.25 0.05
0.50 BSC
0.75 0.05
0.00 – 0.05
0.200 REF
BOTTOM VIEW—EXPOSED PAD
(DC3) DFN 1205 REV Ø
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (W-TBD)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
670323fa
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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LT6703-2/LT6703-3
TYPICAL APPLICATIONS
1.8V
V
S
10k
LT6703-3
15V
1.8V
V
OUT
+IN
OUT
0V
0V
GND
Level Translator
High Voltage to Low Voltage
1.8V
15V
V
S
10k
LT6703-3
1.8V
0V
15V
V
OUT
+IN
OUT
0V
GND
Level Translator
Low Voltage to High Voltage
12V
5V
LED
(ON IF I
> 4A)
LOAD
V
S
I
LOAD
LOAD
1k
LT6703-2
–IN
OUT
R
0.1
S
GND
670323 TA02
Low Side Current Sense Alarm
RELATED PARTS
PART NUMBER
DES°RIPTION
Micropower Dual Comparator
°OMMENTS
LT1017/LT1018
1.1V (Min) Supply Voltage, 1.4mV (Max) Input Offset
1.182 1% Reference, 10mV (Max) Input Offset
LTC1441/LTC1442 Micropower Dual Comparator with 1% Reference
LTC1998
LT6700
Micropower Comparator for Battery Monitoring
2.5μA Typ Supply Current, Adjustable Threshold and Hysteresis
Dual Micropower Comparator with 400mV Reference 1.4V to 18V Supply Voltage, 6.5μA Typical Supply Current
670323fa
LT 0507 REV A • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
© LINEAR TECHNOLOGY CORPORATION 2006
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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