FEATURES
LT1716
SOT-23, 44V, Over-The-Top,
Micropower, Precision
Rail-to-Rail Comparator
U
DESCRIPTIO
■
Operates from 2.7V to 44V
■
Over-The-Top®: Input Common Mode Range
Extends 44V Above V–, Independent of V
■
Micropower: 35µA I
■
Offset Voltage: 1.5mV Max
■
5-Pin SOT-23 Package
■
Valid Output with Either Input 5V Below V
■
Rail-to-Rail Output Swing
■
Output Can Drive Loads Above V
■
Internal Pull-Up Current
■
–40°C to 125°C Operating Temperature Range
Q
+
U
APPLICATIO S
■
Power Supply Monitors
■
Relay/Lamp Driver
■
Oscillators
■
Peak Detector
■
Level Shifting
The LT®1716 comparator operates on any total power
supply voltage between 2.7V and 44V drawing 35µA of
+
quiescent current. The LT1716 has a unique input stage
that can be taken 44V above V–, independent of V+ supply.
(Built-in resistors protect the inputs for faults below the
negative supply of up to 5V.) The inputs can withstand 44V
–
both differential and common mode.
The output stage includes a class “B” pull-up current
source, eliminating the need for an external resistive pullup and saving power. Output voltage swings to within
35mV of the negative supply and 55mV of the positive
supply, which makes the comparator a good choice for
low voltage single supply operation. The output stage is
also designed to drive loads connected to a higher supply
than the LT1716 supply, the same as an open collector
output stage.
The LT1716 is available in a SOT-23 5-lead package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Over-The-Top is a registered trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
Lamp Monitor
LAMP
ON/OFF
0.15Ω
0.25A TO 2.5A
5V TO 44V
100k
R
S
1W
5k
RS ≥
CMPD6001
0.04
I
L
1M
4
–
LT1716 LAMP GOOD
3
+
U
Input Bias Current vs Input Bias Voltage
(A)
–
B
I
–100µ
–0.5m
–1.5m
12µ
VS = 5V, 0V
8µ
INPUT
4µ
BELOW
6n
SUPPLY
3n
0
+IN = 2V +IN = 2V
–3n
–6n
–1m
–5 0 5 10 15 20 45
–10
INPUT
ABOVE
SUPPLY
+IN = 10V
–
V
(V)
IN
1716 TA02
1716f
3V
0.1µF
5
1
2
1716 TA01
1
LT1716
WW
W
ABSOLUTE AXI U RATI GS
U
UUW
PACKAGE/ORDER I FOR ATIO
(Note 1)
Supply Voltage (V+ to V–)........................................ 44V
Differential Input Voltage ......................................... 44V
Input Voltage ...................................................44V, –5V
Output Short-Circuit Duration (Note 2)............ Indefinite
Operating Temperature Range (Note 3)
LT1716C/LT1716I ............................. – 40°C to 85°C
LT1716H .......................................... –40°C to 125°C
Specified Temperature Range (Note 4)
TOP VIEW
OUT
1
–
V
2
+IN
T
JMAX
+
3
S5 PACKAGE
5-LEAD PLASTIC SOT-23
= 150°C, θJA = 250°C/W
+
54V
–
–IN
ORDER PART NUMBER
LT1716CS5
LT1716IS5
LT1716HS5
S5 PART MARKING*
LTYD
LT1716C/LT1716I ............................. – 40°C to 85°C
LT1716H .......................................... –40°C to 125°C
Maximum Junction Temperature .......................... 150°C
Storage Temperature Range ................. –65°C to 150°C
*The temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Lead Temperature (Soldering, 10 sec)..................300°C
ELECTRICAL CHARACTERISTICS
temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. Single supply operation V+ = 5V, V– = 0V;
VCM = V+/2 unless otherwise noted. (Note 4)
The ● denotes the specifications which apply over the full operating
LT1716C/LT1716I
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
I
OS
I
B
CMRR Common Mode Rejection Ratio 0.5V ≤ VCM < (V+ – 1V) ● 89 110 dB
PSRR Power Supply Rejection Ratio V– = 0V, VCM = 1.5V; 2.7V < V+ < 36V ● 95 110 dB
A
VOL
I
S
Input Offset Voltage 0.5V < VCM < (VCC – 1V) 300 1600 µV
0°C < TA < 70°C ● 2100 µV
–40°C < T
Input Offset Voltage Drift 0°C < TA < 70°C ● 2 µV/°C
(Note 5) –40°C < TA < 85°C ● 2 µV/°C
Input Offset Current VCM = V+/2 ● 315 nA
VCM = 0V ● 1.3 µA
V
CM
Input Bias Current VCM = V+/2 20 50 nA
V+ = 0V, VCM = 44V 2 nA
V
CM
V
CM
VCM = –5V ● 1 1.4 mA
Input Voltage Range (Note 7) ● 0.5 44 V
0.5V ≤ V
Minimum Operating Supply Voltage ● 2.4 2.7 V
Large-Signal Voltage Gain RL = 1k; 1V < V
Supply Current V+ = 3V, RL = Open, VO = High 35 50 µA
V+ = 5V, RL = Open, VO = High 35 55 µA
V+ = 12V, RL = Open, VO = High 40 60 µA
< 85°C ● 2500 µV
A
= 44V ● 0.9 µA
● 35 75 nA
= 0V ● 313 µA
= 44V ● 69 µA
< 44V, (Note 6) ● 81 110 dB
CM
< 4V 200 500 V/mV
OUT
● 100 V/mV
● 65 µA
● 75 µA
● 85 µA
2
1716f
LT1716
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. Single supply operation V+ = 5V, V– = 0V;
VCM = V+/2 unless otherwise noted. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
–
I
SC
+
I
SC
V
OL
V
OH
Output Sink Current (Note 2) V
Output Source Current V
Output Voltage Swing Low I
(Referred to V
Output Voltage Swing High I
(Referred to V
–
)I
+
)I
Leakage Current V
Propagation Delay V
OVERDRIVE
OVERDRIVE
SINK
SINK
I
SINK
I
SINK
SOURCE
SOURCE
OUT
OVERDRIVE
> 30mV ● 10 20 mA
= 5mV, V
= 0mA, V
OVERDRIVE
= 1V ● 60 85 µA
OUT
= –10mV ● 20 35 mV
= 0.1mA ● 75 110 mV
= 1mA ● 200 300 mV
= 5mA ● 550 900 mV
= 0µA, V
OVERDRIVE
= 10mV ● 30 55 mV
= 10µA ● 130 185 mV
= 40V, V
> 100mV, R
OVERDRIVE
> 100mV ● 0.5 2 µA
= 10k 3 5.5 µs
LOAD
LT1716C/LT1716I
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifications
are at TA = 25°C. Split supply operation VS = ±15V, VCM = 0V unless otherwise noted. (Note 4)
LT1716C/LT1716I
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
I
OS
I
B
CMRR Common Mode Rejection Ratio –14.5V < VCM < 14V ● 92 110 dB
PSRR Power Supply Rejection Ratio VS = ±1.35V to ±22V ● 90 110 dB
A
VOL
I
S
–
I
SC
+
I
SC
V
OL
Input Offset Voltage –14.5V < VCM < 14V 300 1500 µV
0°C < T
< 70°C ● 2000 µV
A
–40°C < T
< 85°C ● 2400 µV
A
Input Offset Voltage Drift (Note 5) 0°C < TA < 70°C ● 2 µV/°C
–40°C < T
< 85°C ● 2 µV/°C
A
Input Offset Current VCM = 0V ● 315 nA
= 29V ● 0.9 µA
V
CM
V
= –15V ● 1.3 µA
CM
Input Bias Current VCM = 0V 30 60 nA
● 50 100 nA
VCM = 29V ● 69 µA
= –15V ● 313 µA
V
CM
V
= –20V ● 1 1.4 mA
CM
Input Voltage Range (Note 7) ● –14.5 14 V
–14.5V < V
< 29V (Note 6) ● 81 98 dB
CM
Minimum Operating Supply Voltage ● 2.4 2.7 V
Large-Signal Voltage Gain RL = 6k; –14V < V
< 14V 500 1000 V/mV
OUT
● 400 V/mV
Supply Current VS = ±15V, RL = Open, VO = High ● 40 95 µA
Output Sink Current (Note 2) V
Output Source Current V
Output Voltage Swing Low I
(Referred to V
–
)I
OVERDRIVE
OVERDRIVE
SINK
SINK
I
SINK
I
SINK
> 30mV ● 10 20 mA
= 5mV, V
= 0mA, V
OVERDRIVE
= –14V ● 70 105 µA
OUT
= –10mV ● 20 35 mV
= 0.1mA ● 75 110 mV
= 1mA ● 200 300 mV
= 5mA ● 550 900 mV
1716f
3
LT1716
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. Split supply operation VS = ±15V, VCM = 0V
unless otherwise noted. (Note 4)
LT1716C/LT1716I
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OH
Output Voltage Swing High I
(Referred to V
+
)I
Leakage Current V
Propagation Delay V
= 0µA, V
SOURCE
= 10µA ● 140 210 mV
SOURCE
= 25V, V
OUT
OVERDRIVE
OVERDRIVE
OVERDRIVE
> 100mV, R
= 10mV ● 45 75 mV
> 100mV ● 0.6 2 µA
= 10k 5.5 9 µs
LOAD
The ● denotes the specifications which apply over the operating temperature range of –40°C < TA < 125°C, otherwise specifications
are at TA = 25°C. Single supply operation V+ = 5V, V– = 0V, VCM = VCC/2 unless otherwise noted. (Note 4)
LT1716H
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
I
OS
I
B
CMRR Common Mode Rejection Ratio 0.5V < VCM < (V+ – 1V) ● 75 110 dB
PSRR Power Supply Rejection Ratio V– = 0V, VCM = 1.5V, 2.7V < V+ < 36V ● 85 110 dB
A
VOL
I
S
–
I
SC
+
I
SC
V
OL
V
OH
Input Offset Voltage 0.5V < VCM < (VCC – 1V) 300 1600 µV
● 2900 µV
Input Offset Voltage Drift (Note 5) ● 2 µV/°C
Input Offset Current VCM = V+/2 ● 3 220 nA
V
= 0V ● 1.3 µA
CM
= 44V ● 0.9 µA
V
CM
Input Bias Current VCM = V+/2 20 50 nA
● 900 nA
V+ = 0V, VCM = 44V 2 nA
= 0V ● 325 µA
V
CM
V
= 44V ● 614 µA
CM
= –5V ● 1 1.4 mA
V
CM
Input Voltage Range (Note 7) 0.5 44 V
0.5V < V
< 44V (Note 6) ● 72 110 dB
CM
Minimum Operating Supply Voltage ● 2.4 2.7 V
Large-Signal Voltage Gain RL = 1k, 1V < V
= 6k ● 20 V/mV
R
L
< 4V 200 500 V/mV
OUT
Supply Current per Amplifier V+ = 3V, RL = Open, VO = High 35 50 µA
● 70 µA
V+ = 5V, RL = Open, VO = High 35 55 µA
● 75 µA
V+ = 12V, RL = Open, VO = High 40 60 µA
● 85 µA
Output Sink Current (Note 2) V
Output Source Current V
Output Voltage Swing Low I
(Referred to V
–
)I
Output Voltage Swing High I
(Referred to V+) I
Leakage Current V
Propagation Delay V
OVERDRIVE
OVERDRIVE
SINK
SINK
I
SINK
I
SINK
SOURCE
SOURCE
OUT
OVERDRIVE
> 30mV ● 510 mA
= 5mV, V
= 0mA, V
OVERDRIVE
= 1V ● 60 110 µA
OUT
= –10mV ● 20 60 mV
= 0.1mA ● 75 170 mV
= 1mA ● 200 480 mV
= 5mA ● 550 1200 mV
= 0µA, V
OVERDRIVE
= –10mV ● 50 110 mV
= 10µA ● 130 220 mV
= 40V, V
> 100mV, R
OVERDRIVE
> 100mV ● 1.7 5 µA
= 10k 6 9 µs
LOAD
1716f
4
LT1716
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the operating
temperature range of –40°C < TA < 125°C, otherwise specifications are at TA = 25°C. Split supply operation VS = ±15V, VCM = 0V
unless otherwise noted. (Note 4)
LT1716H
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
I
OS
I
B
CMRR Common Mode Rejection Ratio –14.5V < VCM < 14V ● 85 110 dB
PSRR Power Supply Rejection Ratio VS = ±1.35V to ±22V ● 80 110 dB
A
VOL
I
S
–
I
SC
+
I
SC
V
OL
V
OH
Input Offset Voltage –14.5V < VCM < 14V 300 1500 µV
● 2900 µV
Input Offset Voltage Drift (Note 5) ● 2 µV/°C
Input Offset Current VCM = 0V ● 3 280 nA
V
= 29V ● 0.9 µA
CM
= –15V ● 1.3 µA
V
CM
Input Bias Current VCM = 0V 30 60 nA
● 50 1400 nA
VCM = 29V ● 620 µA
= –15V ● 330 µA
V
CM
V
= –20V ● 1 1.4 mA
CM
Input Voltage Range (Note 7) ● –14.5 14 V
–14.5V < V
< 29V (Note 6) ● 70 93 dB
CM
Minimum Operating Supply Voltage ● 2.4 2.7 V
Large-Signal Voltage Gain RL = 6k; –14V < V
= 6k; –13V < V
R
L
< 14V 500 1000 V/mV
OUT
< 13V ● 50 V/mV
OUT
Supply Current VS = ±15V, RL = Open, VO = High 40 95 µA
Output Sink Current (Note 2) V
Output Source Current V
Output Voltage Swing Low I
(Referred to V
Output Voltage Swing High I
(Referred to V
–
)I
+
)I
Leakage Current V
Propagation Delay V
OVERDRIVE
OVERDRIVE
SINK
SINK
I
SINK
I
SINK
SOURCE
SOURCE
OUT
OVERDRIVE
> 30mV ● 510 mA
= 5mV, V
= 0mA, V
OVERDRIVE
= –14V ● 70 155 µA
OUT
= –10mV ● 20 70 mV
= 0.1mA ● 75 170 mV
= 1mA ● 200 480 mV
= 5mA ● 550 1200 mV
= 0µA, V
OVERDRIVE
= 10mV ● 45 120 mV
= 10µA ● 140 250 mV
= 25V, V
> 100mV, R
OVERDRIVE
> 100mV ● 1.5 5 µA
= 10k 5.5 10 µs
LOAD
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: A heat sink may be required to keep the junction temperature
below absolute maximum.
Note 3: The LT1716C/LT1716I are guaranteed functional over the
operating temperature range of –40°C to 85°C. The LT1716H is
guaranteed functional over the operating temperature range of –40°C
to 125°C.
Note 4: The LT1716C is guaranteed to meet specified performance from
0°C to 70°C. The LT1716C is designed, characterized and expected to
meet performance from –40°C to 85° but is not tested or QA sampled at
the temperatures. The LT1716I is guaranteed to meet specified
performance from –40°C to 85°C. The LT1716H is guaranteed to meet
specified performance from –40°C to 125°C.
Note 5: This parameter is not 100% tested.
Note 6: Typical input offset voltage of 500µV at VCM = 44V above V– and a
maximum input offset voltage of 4mV at V
Note 7: If one input is within this input range, the other input can go 5V
–
below V
and the output will be valid.
= 44V above V–.
CM
1716f
5
LT1716
UW
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
vs Common Mode Voltage
10
VS = ±15V
8
6
(µA)
4
BIAS
I
2
0
–2
0
125°C
5 10 15 20 25 30
VCM (V)
Output Low Voltage
vs Sink Current
2.0
1.6
1.2
0.8
VOL AT 125°C
VOL AT 85°C
VOL AT –55°C
125°C
25°C
85°C
–55°C
INPUTS
EXCEED SUPPLY
VOL AT 25°C
1716 G01
Input Bias Current
vs Temperature
1.0000
0.1000
0.0100
0.0010
0.0000
INPUT BIAS CURRENT (µA)
–0.0010
–0.0100
CURRENT
OUT OF PIN
–50
OUT OF PIN
–25 25
Output High Voltage
vs Source Current
5.0
) (V)
+
4.9
4.8
4.7
VOH AT 85°C, 125°C
V+ = 15V
–
= –15V
V
= 0V
V
CM
CURRENT
050
TEMPERATURE (°C)
VOH AT –55°C
VOH AT 25°C
75
V+ = 5V
–
= 0V
V
= 2.5V
V
CM
100
V+ = 5V
–
V
125
= 0V
1716 G02
150
Input Bias Current
vs Differential Input Voltage
1
0
–1
CURRENT (nA)
–2
BIAS
I
–3
–4
–0.2
–0.15 –0.1
DIFFERENTIAL INPUT VOLTAGE (V)
V+ = 15V
–
= –15V
V
–IN +IN
0
–0.05 0.05 0.2
Input Bias Current with Inputs
Driven Above the Supply
10
V+ = 5V
–
= 0V
V
(µA)
BIAS
I
8
6
4
2
125°C
85°C
25°C
TRANSITION
REGION
0.1 0.15
–55°C
1716 G03
0.4
OUTPUT VOLTAGE (RELATIVE TO GND) (V)
0
2 4 6 8 10 12 14 16 18 20
0
LOADING SINK CURRENT (mA)
Input Bias Current with Inputs
Driven Below the Supply
200
V+ = 2.7V TO 44V
–
= 0V
V
0
–200
–400
(µA)
–600
BIAS
I
–800
–1000
–1200
–55°C < TA < 125°C
–4 –3 –2 –1 0
–5
VCM (V)
V+ = 5V
–
= 0V
V
1716 G04
1716 G07
4.6
OUTPUT HIGH VOLTAGE (RELATIVE TO V
4.5
5 10 15 20 25 30 35 40 45 50
0
LOADING SOURCE CURRENT (µA)
Supply Current vs Temperature
100
V+ = 5V
–
90
= 0V
V
80
70
60
50
40
30
SUPPLY CURRENT (µA)
20
10
0
–50
–25 25
OUTPUT LOW
OUTPUT HIGH
0
TEMPERATURE (°C)
50
75
100
125
1716 G05
1716 G08
150
0
–2
0
INPUTS
EXCEED SUPPLY
51015 20 25 30 35 40 45 50
VCM (V)
Positive Supply Current
vs Output Sinking Current
1000
TA = 25°C
100
POSITIVE SUPPLY CURRENT (µA)
10
0.1
VS = ±15V
1 10 100
OUTPUT SINK CURRENT (mA)
1716 G06
VS = 5V
1716 G09
1716f
6
UW
TEMPERATURE (°C)
–50
0
OUTPUT CURRENT LIMIT (mA)
5
10
15
20
050
100
150
1716 G11
25
30
–25 25
75
125
OUTPUT SHORTED TO V
+
VS = 5V
VS = ±15V
30V
26V
5V
0V
TIME (µs)V
S
= 5V, 0V
V
OD
= 10mV
R
L
= 10k, 100k, OPEN
V
IN
+
= 26V TO 30V
V
IN
–
= 29.99V
1716 G17
V
IN
+
V
OUT
RL = 10k
R
L
= 100k
R
L
= OPEN
TYPICAL PERFOR A CE CHARACTERISTICS
LT1716
Output Leakage Current
vs Output Voltage
500
V+ = 5V
–
V
= 0V
T
= 25°C
A
450
400
350
300
OUTPUT LEAKAGE CURRENT (nA)
250
10 15 20 25 30 35 40 45
5
OUTPUT VOLTAGE (V)
Output Sinking Current
vs Total Supply Voltage
30
OUTPUT SHORTED TO V
TA = 25°C
25
20
15
10
OUTPUT SINKING LIMIT (mA)
5
0
1
TOTAL SUPPLY VOLTAGE (V)
1716 G10
+
10 100
1716 G12
Reverse Supply Current
0.6
TA = 25°C
0.5
0.4
0.3
0.2
REVERSE CURRENT (mA)
0.1
0
5 10 15 20 25
0
REVERSE VOLTAGE (V)
Total Switching Time
vs Temperature
100
VS = ±15V
RISE
10
VS = ±2.5V
–50 –25
FALL
0
TEMPERATURE (°C)
TOTAL SWITCHING TIME (µs)
1
RL = 10k
= 90% V
V
OUT
= 10% V
V
OUT
= 100mV
V
STEP
V
OVERDRIVE
VS = ±15V
FALL
VS = ±2.5V
RISE
50
25 75
FINAL
FINAL
= 10mV
100
1716 G27
(RISE)
(FALL)
125
1716 G13
150
Output Sinking Current Limit
vs Temperature
Total Switching Time
vs Overdrive
100
10
TOTAL SWITCHING TIME (µs)
1
20 100
10
0
RL = 10k
V
OUT
V
OUT
V
STEP
T
A
±2.5V
FALL TIME
±2.5V
RISE TIME
40
30
OVERDRIVE (mV)
= 25°C
50
= 90% V
= 10% V
= 100mV
FALL TIME
RISE TIME
FINAL
FINAL
±15V
±15V
(RISE)
(FALL)
807060
90
1716 G14
Total Switching Time
vs Total Supply Voltage
100
RL = 10k
V
V
V
V
V
10
TOTAL SWITCHING TIME (µs)
1
0
= 90% V
OUT
= 10% V
OUT
= 1/2 V
CM
= 100mV
STEP
OVERDRIVE
TOTAL SUPPLY VOLTAGE (V)
FINAL
FINAL
TOTALSUPPLY
= 10mV
10
(RISE)
(FALL)
20
FALL
RISE
Total Switching Time
vs Pull-Up Resistor
100
V
= 90% V
OUT
V
STEP
V
OVERDRIVE
= 25°C
T
A
10
TOTAL SWITCHING TIME (µs)
30
40
1716 G15
1
1 10
FINAL
= 100mV
= 10mV
VS = ±15V
RISE
VS = ±2.5V
RISE
PULL-UP RESISTOR (kΩ)
100 1000 10000
1716 G16
Response Time
1716f
7
LT1716
UW
TYPICAL PERFOR A CE CHARACTERISTICS
30V
+
V
IN
26V
5V
V
OUT
0V
2.5V
+
V
IN
2.4V
Response Time
= 5V, 0V TIME(µs) 1716 G18
V
S
VOD = 10mV
R
= 10k, 100k, OPEN
L
+
= 30V TO 26V
V
IN
–
= 26.01V
V
IN
Response Time
= 10k
R
L
R
L
= 100k
R
= OPEN
L
Response Time
25V
+
V
IN
21V
15V
V
OUT
RL = 10k, 100k
= OPEN
R
L
V
–15V
V
= ±15V TIME(µs) 1716 G19
S
VOD = 10mV
R
= 10k, 100k, OPEN
L
+
= 21V TO 25V
V
IN
–
= 24.99V
V
IN
Response Time
2.6V
+
V
V
OUT
IN
5V
2.5V
5V
V
OUT
0V
V
V
OUT
+
V
IN
OUT
–15V
+
IN
–100mV
–15V
25V
21V
15V
0V
15V
Response Time
V
= ±15V TIME(µs) 1716 G20
S
VOD = 10mV
R
= 10k, 100k, OPEN
L
+
= 25V TO 21V
V
IN
–
= 21.01V
V
IN
Response Time
RL = 10k, 100k
RL = OPEN
0V
= 5V TIME(µs) 1716 G22
= 5V TIME(µs) 1716 G21
V
S
VOD = 10mV
= 10k, 100k, OPEN
R
L
+
= 2.4V TO 2.5V
V
IN
–
V
= 2.49V
IN
Response Time
100mV
+
V
IN
0V
15V
V
OUT
–15V
V
= ±15V TIME(µs) 1716 G24
S
VOD = 10mV
= 10k, 100k, OPEN
R
L
+
V
= 110mV TO 0mV
IN
–
= 10mV
V
IN
V
IN
V
OUT
V
S
VOD = 10mV
= 10k, 100k, OPEN
R
L
+
= 2.6V TO 2.5V
V
IN
–
V
= 2.51V
IN
–
Fault (Rising)
S
–14.9V
+
–19V
Below V
15V
RL = 10k, 100k
–15V
= ±15V TIME(µs) 1716 G25
V
S
RL = 10k, 100k, OPEN
+
= –19V TO – 14.9V
V
IN
–
= –15V
V
IN
RL = OPEN
V
IN
V
OUT
= ±15V TIME(µs) 1716 G23
V
S
VOD = 10mV
= 10k, 100k, OPEN
R
L
+
= –100mV TO 0V
V
IN
–
V
= –10mV
IN
–
Fault (Falling)
S
–14.9V
+
Below V
–19V
15V
–15V
= ±15V TIME(µs) 1716 G26
V
S
RL = 10k, 100k, OPEN
+
= –14.9V TO –19V
V
IN
–
= –15V
V
IN
8
1716f
LT1716
U
WUU
APPLICATIO S I FOR ATIO
The LT1716 comparator features low power operation
with exceptional input precision with rail-to-rail input and
output swing. The comparator operates flawlessly even
when the inputs are pulled over the positive rail or below
the negative rail.
Supply Voltage
The LT1716 operates from 2.7V to 44V. The comparator
can be shut down by removing V+. In this condition, the
input bias current is typically less than 3nA, even if the
inputs are 44V above the negative supply. The LT1716 is
protected against reverse battery voltages of up to 20V.
The reverse battery current is resistive as shown in the
reverse supply current graph.
Inputs
The comparator inputs can swing from 0.5V above to 44V
above V–. If one input is within this range, the other input
can be forced up to 5V below V– without phase reversal
occuring at the output.
The LT1716 has three stages—NPN, PNP and common
base (see Simplified Schematic)—resulting in three distinct operating regions and two transition regions as
shown in the Input Bias Current vs Common Mode typical
performance curve.
For input voltages about 0.8V or more below V+, the PNP
input stage is active and the input bias current is typically
–4nA. The PNP differential input stage will have bias
current that flows out of the device. With a differential
input voltage of even just 100mV or so, there will be zero
bias current into the higher of the two inputs, while the
current flowing out of the lower input will be twice the
measured bias current.
When the input voltage is about 0.5V or less from V+, the
NPN state is operating and the input bias current is
typically 10nA. Increases in temperature will cause the
voltage at which operation switches from the PNP stage to
the NPN stage to move towards V+. The input offset
voltage of the NPN stage is untrimmed and is typically
500µV.
A Schottky diode in the collector of each NPN transistor of
the NPN input stage allows the LT1716 to operate with
either or both of its inputs above V+. At about 0.3V above
V+, the NPN transistor is fully saturated and the input bias
current is typically 4µA at room temperature. The input
offset voltage is typically 500µV when operating above V+.
The LT1716 will operate with its input 44V above V–,
regardless of V+.
The transition to the negative common mode input stage
occurs at 0.3V above V–. Above this trip point the PNP
stage is active. When the inputs are 0.3V below V–, the
common base input stage is active in addition to the PNP
stage. The input bias current out of each input becomes
VIN/5kΩ. The LT1716 is designed to operate when either
input falls below the negative supply. Internal resistors
protect the inputs for faults below the negative supply of
up to 5V without phase reversal. The built-in 5k resistor
limits the current at each input to 1mA at 5V below the
negative supply. External matched input resistors can be
added for increased voltage fault operation below the
negative supply but the maximum input current should be
kept under 1mA.
Input Protection
The inverting and noninverting input pins of the LT1716
have on-chip protection. ESD protection is provided to
prevent damage during handling. The input transistors
have voltage clamping and limiting resistors to protect
against excursions as much as 5V below V–. There are no
clamping diodes between the inputs and the maximum
differential input voltage is 44V.
Output
The output stage of the LT1716 can drive loads connected
to a supply more positive than the device, the same as
comparators with open collector output stages. The output of the LT1716 can be pulled up to 44V above V–,
regardless of V+.
1716f
9
LT1716
Q18
Q34
Q17Q16
Q15
Q61
Q6BA
Q5
R1
5k
IN
–
V
CC
V
EE
B
A
Q8
Q9
Q10
Q62
Q33
Q39
D5
Q35
Q3 Q4 Q1
Q53
Q7
Q2
R2
5k
IN
+
D4
D3
Q21
3µA
Q20
Q11
R3
60k
R4
30k
R5
R8
R6
R9
R10 R11
R7
Q12
Q13
Q14
Q25
Q24
Q31
Q32
Q22 Q23
Q36
Q37
Q38
Q30
1716 SS
Q26
Q27
D7
Q28D8
Q29
OUT
D6
D2D1
SI PLIFIED
WW
SCHE ATIC
10
1716f
PACKAGE DESCRIPTIO
LT1716
U
S5 Package
5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
0.62
MAX
3.85 MAX
0.20 BSC
DATUM ‘A’
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
2.62 REF
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.50 REF
0.95
REF
1.22 REF
1.4 MIN
0.09 – 0.20
(NOTE 3)
2.80 BSC
1.50 – 1.75
(NOTE 4)
0.80 – 0.90
1.00 MAX
PIN ONE
0.95 BSC
2.90 BSC
(NOTE 4)
0.30 – 0.45 TYP
5 PLCS (NOTE 3)
0.01 – 0.10
1.90 BSC
S5 TSOT-23 0302
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.
1716f
11
LT1716
TYPICAL APPLICATIO S
U
Overcurrent Flag
4.5V TO 44V
R
S
LOAD
3V TO 44V
LT1634-1.25
113k
10M
1%
1%
4
–
LT1716 OVERCURRENT
3
+
11.8k
1%
10.7k
1%
Charge/Discharge Indicator
0.1Ω
CHARGE
CURRENT
681Ω
1%
1M
1%
681Ω
1%
0.1µF
3V
5
2
10M
1%
LOAD V
3V
4
–
LT1716 CHARGE
3
+
CMPD6263
1
0.1
I
=
MAX
R
S
+
CHARGER
–
5
1
2
1M
1%
1716 TA03
0.1µF
CMPD6263
1716 TA04
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC1442 Dual Micropower Comparator and 1% Reference 1.182V ±1% Reference, ±10mV
LTC1540 Nanopower Comparator and 1% Reference 1.182V ±1% Reference, ±10mV
LT1634 Micropower Precision Shunt Reference 0.05%, 10µA, 10ppm/°C Max Drift, 1.25V, 2.5V, 4.096V, 5V, MSOP,
SO-8, TO-92 Packages
LTC1921 Dual –48V Telecom Supply Monitor Monitors Two Supplies and Fuses
LTC1998 Micropower Li-Ion Battery Monitor 1% Trip Point Adjustable from 2.5V to 3.25V
Linear Technology Corporation
12
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
Input Offset
MAX
Input Offset
MAX
1716f
LT/TP 0503 1K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2002
Loading...