LINER LT6703-3 Micropower, low voltage comparator with 400mv reference Datasheet

LT6703-2/LT6703-3
Micropower, Low Voltage
Comparator with
400mV Reference
DESCRIPTION
FEATURES
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■
■
■
■
■
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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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 automotive temperature ranges.
Battery-Powered System Monitoring
Threshold Detectors
Window Comparators
Relay Driving
Optoisolator Driving
Industrial Control Systems
Handheld Instruments
, 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.
TYPICAL APPLICATION
Rising Input Threshold Voltage vs Temperature
1.4V ≤ VIN ≤ 18V
(VTH = 3V)
1MΩ
+IN
1MΩ
VS
LT6703-3
+
OUT
0.1μF
–
154k
400mV
REFERENCE
GND
VS
670323 TA01
RISING INPUT THRESHOLD VOLTAGE (mV)
Micropower Supply Voltage Monitor
404
403
FOUR TYPICAL PARTS
VS = 5V
#1
402
401
400
#2
#3
399
398
397
#4
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
3
DC PACKAGE
3-LEAD (2mm × 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 102°C/W
EXPOSED PAD (PIN 4) IS GND, MUST BE SOLDERED TO PCB
LT6703-2
1
2
VS
2
3
+IN
1
OUT
4
–IN
4
VS
TOP VIEW
OUT
TOP VIEW
DC PACKAGE
3-LEAD (2mm × 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 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)
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT6703CDC-2#TRMPBF
LT6703IDC-2#TRMPBF
LT6703HDC-2#TRMPBF
LT6703CDC-3#TRMPBF
LT6703IDC-3#TRMPBF
LT6703HDC-3#TRMPBF
LT6703CDC-2#TRPBF
LT6703IDC-2#TRPBF
LT6703HDC-2#TRPBF
LT6703CDC-3#TRPBF
LT6703IDC-3#TRPBF
LT6703HDC-3#TRPBF
LCWP
LCWP
LCWP
LCTW
LCTW
LCTW
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
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
TA = 25°C, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VTH(R)
Rising Input Threshold Voltage (Note 6)
RL = 100k, VO = 2V Swing, VS = 5V
395
400
405
mV
VTH(F)
Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing, VS = 5V
387
393.5
400
mV
3.5
HYS
HYS = VTH(R) – VTH(F)
VS = 5V, RL = 100k, VO = 2V Swing
IB
Input Bias Current
VS = 1.4V, 18V, VIN = VS
VS = 1.4V, VIN = 18V
VS = 1.4V, 18V, VIN = 0.1V
6.5
9.5
mV
±0.01
±0.01
±4
±10
±10
±10
nA
nA
nA
VOL
Output Low Voltage
10mV Input Overdrive, VS = 5V, IOUT = 5mA
70
200
mV
IOFF
Output Leakage Current
VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive
VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive
0.01
0.01
0.8
0.8
μA
μA
tPD(HL)
High-to-Low Propagation Delay
VS = 5V, 10mV Input Overdrive, RL = 10k,
VOL = 400mV
18
μs
tPD(LH)
Low-to-High Propagation Delay
VS = 5V, 10mV Input Overdrive, RL = 10k,
VOH = 0.9 • VS
29
μs
tr
Output Rise Time
VS = 5V, 10mV Input Overdrive, RL = 10k
VO = (0.1 to 0.9) • VS
2.2
μs
tf
Output Fall Time
VS = 5V, 10mV Input Overdrive, RL = 10k
VO = (0.1 to 0.9) • VS
0.22
μs
IS
Supply Current
No Load Current, VS = 5V
6.5
11.0
μA
The ● denotes the specifications which apply over the temperature range of 0°C ≤ TA ≤ 70°C, (LT6703C-2/LT6703C-3) unless otherwise
specified (Notes 4, 5).
SYMBOL
PARAMETER
CONDITIONS
MIN
VTH(R)
Rising Input Threshold Voltage (Note 6)
RL = 100k, VO = 2V Swing, VS = 5V
●
VTH(F)
Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing, VS = 5V
●
HYS
HYS = VTH(R) – VTH(F)
VS = 5V, RL = 100k, VO = 2V Swing
●
IB
Input Bias Current
VS = 1.4V, 18V, VIN = VS
VS = 1.4V, VIN = 18V
VS = 1.4V, 18V, VIN = 0.1V
TYP
MAX
UNITS
392.5
407.5
mV
384.5
402.5
mV
3
11
mV
●
●
●
±15
±15
±15
nA
nA
nA
VOL
Output Low Voltage
10mV Input Overdrive, VS = 5V, IOUT = 5mA
●
250
mV
IOFF
Output Leakage Current
VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive
VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive
●
●
1
1
μA
μA
IS
Supply Current
No Load Current, VS = 5V
●
14.0
μA
The ● denotes the specifications which apply over the temperature range of –40°C ≤ TA ≤ 85°C, (LT6703I-2/LT6703I-3) unless otherwise
specified (Notes 4, 5).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VTH(R)
Rising Input Threshold Voltage (Note 6)
RL = 100k, VO = 2V Swing, VS = 5V
●
392
408
mV
VTH(F)
Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing, VS = 5V
●
383.5
403.5
mV
HYS
HYS = VTH(R) – VTH(F)
VS = 5V, RL = 100k, VO = 2V Swing
●
2
11.5
mV
IB
Input Bias Current
VS = 1.4V, 18V, VIN = VS
VS = 1.4V, VIN = 18V
VS = 1.4V, 18V, VIN = 0.1V
●
●
●
±15
±15
±15
nA
nA
nA
VOL
Output Low Voltage
10mV Input Overdrive, VS = 5V, IOUT = 5mA
●
250
mV
IOFF
Output Leakage Current
VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive
VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive
●
●
1
1
μA
μA
IS
Supply Current
No Load Current, VS = 5V
●
15.0
μA
670323fa
3
LT6703-2/LT6703-3
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the temperature range of –40°C ≤ TA ≤ 125°C, (LT6703H-2/LT6703H-3) unless
otherwise specified (Notes 4, 5).
SYMBOL
PARAMETER
CONDITIONS
MAX
UNITS
VTH(R)
Rising Input Threshold Voltage (Note 6)
RL = 100k, VO = 2V Swing, VS = 5V
●
392
410
mV
VTH(F)
Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing, VS = 5V
HYS
HYS = VTH(R) – VTH(F)
VS = 5V, RL = 100k, VO = 2V Swing
●
382.5
404.5
mV
●
2
13.5
mV
IB
Input Bias Current
VS = 1.4V, 18V, VIN = VS
VS = 1.4V, VIN = 18V
VS = 1.4V, 18V, VIN = 0.1V
●
●
●
±45
±45
±50
nA
nA
nA
VOL
Output Low Voltage
10mV Input Overdrive, VS = 5V, IOUT = 5mA
●
250
mV
IOFF
Output Leakage Current
VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive
VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive
●
●
1
1
μA
μA
IS
Supply Current
No Load Current, VS = 5V
●
17.0
μA
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.
MIN
TYP
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: VTH defines the threshold voltage of the comparator and combines
the effect of offset and reference accuracy.
670323fa
4
LT6703-2/LT6703-3
PIN FUNCTIONS
VS
VS
LT6703-3
LT6703-2
–IN
–
+IN
+
OUT
+
OUT
–
400mV
REFERENCE
VS
400mV
REFERENCE
670323 PF03
670323 PF02
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
VS used.
GND: Ground. This pin is also the low side return of the
internal 400mV reference.
VS
GND
IN: External Input for Comparator. The voltage on this pin
can range from –0.3V to 18V with respect to GND regardless
of VS 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.
VS: Supply Voltage. The parts are characterized for operation with 1.4V ≤ VS ≤ 18V with respect to GND.
670323fa
5
LT6703-2/LT6703-3
TYPICAL PERFORMANCE CHARACTERISTICS
Distribution of Rising Input
Threshold Voltage
VS = 5V
TA = 25°C
14
12
10
8
6
4
18
12
10
8
6
4
14
12
10
8
6
4
2
2
0
0
388
390
392
394
396
398
400
FALLING INPUT THRESHOLD VOLTAGE (mV)
0
670323 G01
401
400
#2
#3
399
398
397
#4
5.6
6.4
7.2
HYSTERESIS (mV)
403.0
402.5
402.0
VS = 1.4V
VS = 5V
VS = 12V
VS = 18V
401.5
401.0
400.5
400.0
399.5
396
–60 –40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
399.0
–60 –40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
670323 G04
670323 G05
8
8.8
Rising Input Threshold Voltage
vs Supply Voltage
RISING INPUT THRESHOLD VOLTAGE (mV)
#1
402
4.8
670323 G03
Rising Input Threshold Voltage
vs Temperature
RISING INPUT THRESHOLD VOLTAGE (mV)
403
FOUR TYPICAL PARTS
VS = 5V
4
670323 G02
Rising Input Threshold Voltage
vs Temperature
404
VS = 5V
TA = 25°C
16
14
2
394
396
398
400
402
404
406
RISING INPUT THRESHOLD VOLTAGE (mV)
RISING INPUT THRESHOLD VOLTAGE (mV)
Distribution of Hysteresis
20
VS = 5V
TA = 25°C
16
PERCENT OF UNITS (%)
PERCENT OF UNITS (%)
16
18
PERCENT OF UNITS (%)
18
Distribution of Falling Input
Threshold Voltage
403.0
TA = 25°C
TA = 85°C
TA = 125°C
TA = –55°C
402.5
402.0
401.5
401.0
400.5
400.0
399.5
399.0
2
4
8 10 12 14
6
SUPPLY VOLTAGE (V)
16
18
670323 G06
670323fa
6
LT6703-2/LT6703-3
TYPICAL PERFORMANCE CHARACTERISTICS
Hysteresis vs Temperature
FOUR TYPICAL PARTS
9 VS = 5V
#1
#2
8
#3
#4
7
9
8
HYSTERESIS (mV)
6
5
VS = 1.4V
VS = 5V
VS = 12V
VS = 18V
6
5
7
6
5
4
4
3
3
3
2
–60 –40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
2
–60 –40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
2
670323 G07
670323 G08
0
TA = 25°C
TA = 85°C
–3
TA = 25°C
TA = 85°C
TA = 125°C
TA = –55°C
–4
1.1
1.5
1.3
1.7
SUPPLY VOLTAGE (V)
1.9
670323 G10
SUPPLY CURRENT (μA)
–2
4
8 10 12 14
6
SUPPLY VOLTAGE (V)
16
18
670323 G09
Start-Up Supply Current
50
TA = 125°C
TA = –55°C
9 NO LOAD CURRENT
–1
–5
0.9
2
Quiescent Supply Current
vs Supply Voltage
10
TA = 125°C
TA = –55°C
8
4
1
TA = 25°C
TA = 85°C
9
7
Minimum Supply Voltage
THRESHOLD SHIFT (mV)
Hysteresis vs Supply Voltage
10
TA = 25°C
TA = 85°C
TA = 125°C
TA = –55°C
40
SUPPLY CURRENT (μA)
HYSTERESIS (mV)
10
HYSTERESIS (mV)
Hysteresis vs Temperature
10
8
7
6
30
20
10
5
4
1.4 3.4 5.4 7.4 9.4 11.4 13.4 15.4 17.4
SUPPLY VOLTAGE (V)
670323 G11
0
0
0.2
0.4 0.6 0.8 1.0 1.2
SUPPLY VOLTAGE (V)
1.4
670323 G12
670323fa
7
LT6703-2/LT6703-3
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current
vs Output Sink Current
Supply Current
vs Output Sink Current
1000
10
0.1
1
10
0.01
OUTPUT SINK CURRENT (mA)
100
10
1
0.001
100
0.1
1
10
0.01
OUTPUT SINK CURRENT (mA)
Below Ground Input Bias Current
Low Level Input Bias Current
VS = 18V
–0.3V < VIN < 0V
TA = 25°C
TA = 85°C
TA = 125°C
TA = –55°C
High Level Input Bias Current
10
CURRENT IS GOING INTO THE DEVICE
1
0
–1
–2
–3
VS = 18V
0V < VIN < 1V
TA = 25°C
TA = 85°C
TA = 125°C
TA = –55°C
–4
–5
–6
CURRENT IS GOING OUT OF THE DEVICE
–7
–0.2
–0.1
INPUT VOLTAGE (V)
0
670323 G16
0
100
0.01
0.1
1
10
OUTPUT SINK CURRENT (mA)
10
CURRENT IS POSITIVE GOING
2 INTO THE DEVICE
100
1
–0.3
10
670323 G15
3
INPUT BIAS CURRENT (nA)
INPUT BIAS CURRENT (nA)
1000
100
670323 G14
670323 G13
10000
TA = 85°C
VS = 1.4V
VS = 5V
VS = 12V
VS = 18V
1
0.001
100
INPUT BIAS CURRENT (nA)
1
0.001
1000
TA = 25°C
VS = 1.4V
VS = 5V
VS = 12V
VS = 18V
SUPPLY CURRENT (μA)
TA = –40°C
VS = 1.4V
VS = 5V
VS = 12V
VS = 18V
SUPPLY CURRENT (μA)
SUPPLY CURRENT (μA)
1000
100
Supply Current
vs Output Sink Current
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
INPUT VOLTAGE (V)
1
0.1
VS = 18V
VIN > 1V
TA = 25°C
TA = 85°C
TA = 125°C
0.01
0.001
1
670323 G17
1
3
5
7
9 11 13
INPUT VOLTAGE (V)
15
17
670323 G18
670323fa
8
LT6703-2/LT6703-3
TYPICAL PERFORMANCE CHARACTERISTICS
Output Saturation Voltage
vs Output Sink Current
Output Saturation Voltage
vs Output Sink Current
1000
1000
100
10
0.001
100
10
0.001
100
0.01
0.1
1
10
OUTPUT SINK CURRENT (mA)
TA = 25°C
VS = 1.4V
VS = 5V
VS = 12V
VS = 18V
OUTPUT SATURATION VOLTAGE (mV)
TA = –40°C
VS = 1.4V
VS = 5V
VS = 12V
VS = 18V
OUTPUT SATURATION VOLTAGE (mV)
OUTPUT SATURATION VOLTAGE (mV)
1000
0.01
0.1
1
10
OUTPUT SINK CURRENT (mA)
670323 G19
70
60
50
40
30
VS = 5V
TA = 25°C
TA = 85°C
TA = 125°C
TA = –55°C
0
0
2
4
8 10 12 14
6
OUTPUT VOLTAGE (V)
16
50
TA = 25°C
VS = 1.4V
VS = 5V
VS = 12V
VS = 18V
40
30
20
10
2
0
LH NONINV
HL NONINV
LH INV
HL INV
30
20
4
8 10 12 14
6
OUTPUT VOLTAGE (V)
16
100
20
60
80
40
INPUT OVERDRIVE (mV)
100
670323 G25
VS = 5V
TA = 25°C
TA = 85°C
TA = 125°C
TA = –55°C
0.01
18
0
2
4
6
8 10 12 14
OUTPUT VOLTAGE (V)
16
18
670323 G24
Noninverting and Inverting
Comparator Propagation Delay
VS = 5V
CL = 20pF
TA = 25°C
VO(NINV)
5V/DIV
DC
10
VO(INV)
5V/DIV
DC
RISE
1
FALL
VIN
10mV/DIV
AC
0.1
10
0
0.1
Rise and Fall Times
vs Output Pull-Up Resistor
40
0
1
670323 G23
RISE AND FALL TIME (μs)
50
670323 G21
0.001
0
18
100
Output Leakage Current
60
Propagation Delay
vs Input Overdrive
TA = 25°C
0.1
1
10
0.01
OUTPUT SINK CURRENT (mA)
10
670323 G22
60
10
0.001
100
OUTPUT LEAKAGE CURRENT (nA)
70
SHORT-CIRCUIT CURRENT (mA)
SHORT-CIRCUIT CURRENT (mA)
80
10
100
Output Short-Circuit Current
80
20
TA = 85°C
VS = 1.4V
VS = 5V
VS = 12V
VS = 18V
670323 G20
Output Short-Circuit Current
PROPAGATION DELAY (μs)
Output Saturation Voltage
vs Output Sink Current
0.01
0.1
1
10
100
OUTPUT PULL-UP RESISTOR (kΩ)
1000
670323 G27
20μs/DIV
VS = 5V
TA = 25°C
RLOAD = 10k CONNECTED TO VS
VIN(OVERDRIVE) = 10mV OVER THE INPUT
VOLTAGE THRESHOLDS
670323 G26
670323fa
9
LT6703-2/LT6703-3
APPLICATIONS INFORMATION
The LT6703-2/LT6703-3 devices are micropower comparators with a built-in 400mV reference. Features include wide
supply voltage range (1.4V to 18V), Over-The-Top input and
output range, 2% accurate rising input threshold voltage
and 6.5mV typical built-in hysteresis.
circuitry can be employed to increase effective hysteresis
if desired, but such circuitry will provide an apparent effect
on both the rising and falling input thresholds (the actual
internal thresholds remain unaffected).
Comparator Input
Internal Reference
Each comparator has one input available externally. The two
versions of the part differ by the polarity of the available
input (i.e., inverting or noninverting). The other comparator
input is connected internally to the 400mV reference. The
rising input threshold voltage of the comparator is designed
to be equal to that of the reference (i.e., ≈400mV). The
reference voltage is established with respect to the device
GND connection.
Hysteresis
Each comparator has built-in 6.5mV (typical) of hysteresis
to simplify designs, to insure stable operation in the presence 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
R3
VS
R4
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.
Comparator 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 opencollector device, the outputs of multiple comparators may
be tied together to implement wire-AND logic functions.
R1
VIN
+IN
LT6703-3
R2
OUT
GND
670323 F01
THRESHOLD EQUATIONS:
VIN (L TO H) = (400mV) • (R1) •
VIN (H TO L) = (393mV) • (R1) •
(
(
1
+
R1
1
R1
1
+
R2
+
1
R2
1
R3
+
)
1
R3 + R4
)( )
–
VS • R1
R3 + R4
Figure 1. Additional Hysteresis Circuit
VOUT
Power Supplies
The comparator circuitry operates from a single 1.4V
to 18V supply. A minimum 0.1μF bypass capacitor is
required between the VS pin and GND. When an output
load is connected to the supply rail near the part and the
output is sinking more than 5mA, a 1μF bypass capacitor is
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
the VS pin.
670323fa
10
LT6703-2/LT6703-3
PACKAGE DESCRIPTION
DC Package
3-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1717 Rev Ø)
1.35 ±0.05
(2 SIDES)
1.00 ±0.05
1.30 ±0.05 (2 SIDES)
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
2.00 ±0.10
(4 SIDES)
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
1.00 ± 0.05
(2 SIDES)
0.40 ±0.05
0.200 REF
0.75 ±0.05
0.70 ±0.05
PIN 1 NOTCH
R = 0.20 OR
0.25 × 45°
CHAMFER
3
R = 0.115 TYP
1
0.25 ± 0.05
0.50 BSC
BOTTOM VIEW—EXPOSED PAD
(DC3) DFN 1205 REV Ø
0.00 – 0.05
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 representation 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
VS
10k
LT6703-3
15V
VOUT
OUT
+IN
0V
1.8V
0V
GND
Level Translator
High Voltage to Low Voltage
1.8V
15V
VS
10k
LT6703-3
1.8V
+IN
0V
VOUT
OUT
15V
0V
GND
Level Translator
Low Voltage to High Voltage
12V
5V
LED
(ON IF ILOAD > 4A)
ILOAD
VS
LOAD
1k
LT6703-2
–IN
RS
0.19
OUT
GND
670323 TA02
Low Side Current Sense Alarm
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1017/LT1018
Micropower Dual Comparator
1.1V (Min) Supply Voltage, ±1.4mV (Max) Input Offset
LTC1441/LTC1442
Micropower Dual Comparator with 1% Reference
1.182 ±1% Reference, ±10mV (Max) Input Offset
LTC1998
Micropower Comparator for Battery Monitoring
2.5μA Typ Supply Current, Adjustable Threshold and Hysteresis
LT6700
Dual Micropower Comparator with 400mV Reference
1.4V to 18V Supply Voltage, 6.5μA Typical Supply Current
670323fa
12 Linear Technology Corporation
LT 0507 REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2006