LINER LT1716CS5

LT1716
SOT-23, 44V, Over-The-Top,
Micropower, Precision
Rail-to-Rail Comparator
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FEATURES
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DESCRIPTIO
Operates from 2.7V to 44V
Over-The-Top®: Input Common Mode Range
Extends 44V Above V –, Independent of V +
Micropower: 35µA IQ
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
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APPLICATIO S
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Power Supply Monitors
Relay/Lamp Driver
Oscillators
Peak Detector
Level Shifting
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.
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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.
TYPICAL APPLICATIO
Lamp Monitor
5V TO 44V
12µ
3V
1M
8µ
0.1µF
VS = 5V, 0V
4µ
100k
CMPD6001
5k
4
RS
0.15Ω
1W
–
6n
5
LT1716
3
0.25A TO 2.5A
RS ≥
+
1
LAMP GOOD
INPUT
ABOVE
SUPPLY
+IN = 10V
0
–3n
+IN = 2V
+IN = 2V
–6n
2
–100µ
0.04
IL
INPUT
BELOW
SUPPLY
3n
IB– (A)
LAMP
ON/OFF
Input Bias Current vs Input Bias Voltage
1716 TA01
–0.5m
–1m
–1.5m
–10
–5
0
5
10
VIN– (V)
15
20
45
1716 TA02
1716f
1
LT1716
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W
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PACKAGE/ORDER I FOR ATIO
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W W
W
ABSOLUTE
AXI U RATI GS
(Note 1)
ORDER PART NUMBER
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)
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
Lead Temperature (Soldering, 10 sec).................. 300°C
LT1716CS5
LT1716IS5
LT1716HS5
TOP VIEW
5 V+
OUT 1
V– 2
+
–
+IN 3
4 –IN
S5 PART MARKING*
S5 PACKAGE
5-LEAD PLASTIC SOT-23
LTYD
TJMAX = 150°C, θJA = 250°C/W
*The temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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)
LT1716C/LT1716I
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
0.5V < VCM < (VCC – 1V)
0°C < TA < 70°C
– 40°C < TA < 85°C
●
●
Input Offset Voltage Drift
(Note 5)
0°C < TA < 70°C
– 40°C < TA < 85°C
●
●
2
2
IOS
Input Offset Current
VCM = V +/2
VCM = 0V
VCM = 44V
●
●
●
3
15
1.3
0.9
nA
µA
µA
IB
Input Bias Current
VCM = V +/2
●
20
35
50
75
nA
nA
●
●
●
2
3
6
1
13
9
1.4
nA
µA
µA
mA
44
V
V + = 0V, VCM = 44V
VCM = 0V
VCM = 44V
VCM = – 5V
Input Voltage Range (Note 7)
300
●
0.5
1600
2100
2500
UNITS
µV
µV
µV
µV/°C
µV/°C
CMRR
Common Mode Rejection Ratio
0.5V ≤ VCM
– 1V)
0.5V ≤ VCM < 44V, (Note 6)
●
●
89
81
110
110
dB
dB
PSRR
Power Supply Rejection Ratio
V – = 0V, VCM = 1.5V; 2.7V < V + < 36V
●
95
110
dB
200
100
500
< (V +
Minimum Operating Supply Voltage
2.4
●
AVOL
Large-Signal Voltage Gain
RL = 1k; 1V < VOUT < 4V
IS
Supply Current
V + = 3V, RL = Open, VO = High
●
50
65
µA
µA
35
55
75
µA
µA
40
60
85
µA
µA
●
V + = 12V, RL = Open, VO = High
●
V
V/mV
V/mV
35
●
V + = 5V, RL = Open, VO = High
2.7
1716f
2
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)
LT1716C/LT1716I
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
ISC–
ISC+
UNITS
Output Sink Current (Note 2)
VOVERDRIVE > 30mV
●
10
20
mA
Output Source Current
VOVERDRIVE = 5mV, VOUT = 1V
●
60
85
µA
VOL
Output Voltage Swing Low
(Referred to V –)
ISINK = 0mA, VOVERDRIVE = –10mV
ISINK = 0.1mA
ISINK = 1mA
ISINK = 5mA
●
●
●
●
20
75
200
550
35
110
300
900
mV
mV
mV
mV
VOH
Output Voltage Swing High
(Referred to V +)
ISOURCE = 0µA, VOVERDRIVE = 10mV
ISOURCE = 10µA
●
●
30
130
55
185
mV
mV
Leakage Current
VOUT = 40V, VOVERDRIVE > 100mV
●
0.5
2
µA
Propagation Delay
VOVERDRIVE > 100mV, RLOAD = 10k
3
5.5
µs
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
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
– 14.5V < VCM < 14V
0°C < TA < 70°C
– 40°C < TA < 85°C
●
●
Input Offset Voltage Drift (Note 5)
0°C < TA < 70°C
– 40°C < TA < 85°C
●
●
2
2
IOS
Input Offset Current
VCM = 0V
VCM = 29V
VCM = – 15V
●
●
●
3
15
0.9
1.3
nA
µA
µA
IB
Input Bias Current
VCM = 0V
●
30
50
60
100
nA
nA
●
●
●
6
3
1
9
13
1.4
µA
µA
mA
14
V
VCM = 29V
VCM = – 15V
VCM = – 20V
Input Voltage Range (Note 7)
300
●
– 14.5
1500
2000
2400
UNITS
µV
µV
µV
µV/°C
µV/°C
CMRR
Common Mode Rejection Ratio
– 14.5V < VCM < 14V
– 14.5V < VCM < 29V (Note 6)
●
●
92
81
110
98
dB
dB
PSRR
Power Supply Rejection Ratio
VS = ±1.35V to ±22V
●
90
110
dB
Minimum Operating Supply Voltage
AVOL
Large-Signal Voltage Gain
2.4
●
RL = 6k; –14V < VOUT < 14V
●
500
400
2.7
1000
V
V/mV
V/mV
VS = ±15V, RL = Open, VO = High
●
Output Sink Current (Note 2)
VOVERDRIVE > 30mV
●
10
20
mA
Output Source Current
VOVERDRIVE = 5mV, VOUT = –14V
●
70
105
µA
Output Voltage Swing Low
(Referred to V –)
ISINK = 0mA, VOVERDRIVE = –10mV
ISINK = 0.1mA
ISINK = 1mA
ISINK = 5mA
●
●
●
●
IS
Supply Current
ISC–
ISC+
VOL
40
20
75
200
550
95
35
110
300
900
µA
mV
mV
mV
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
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
UNITS
VOH
Output Voltage Swing High
(Referred to V +)
ISOURCE = 0µA, VOVERDRIVE = 10mV
ISOURCE = 10µA
●
●
45
140
75
210
mV
mV
Leakage Current
VOUT = 25V, VOVERDRIVE > 100mV
●
0.6
2
µA
Propagation Delay
VOVERDRIVE > 100mV, RLOAD = 10k
5.5
9
µs
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)
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
0.5V < VCM < (VCC – 1V)
MIN
LT1716H
TYP
300
●
Input Offset Voltage Drift (Note 5)
= V+/2
IOS
Input Offset Current
VCM
VCM = 0V
VCM = 44V
IB
Input Bias Current
VCM = V+/2
1600
2900
µV
µV
µV/°C
2
●
●
●
3
220
1.3
0.9
nA
µA
µA
20
50
900
nA
nA
25
14
1.4
nA
µA
µA
mA
44
V
2
3
6
1
●
●
●
Input Voltage Range (Note 7)
0.5
< (V+ – 1V)
UNITS
●
●
V + = 0V, VCM = 44V
VCM = 0V
VCM = 44V
VCM = – 5V
MAX
CMRR
Common Mode Rejection Ratio
0.5V < VCM
0.5V < VCM < 44V (Note 6)
●
●
75
72
110
110
dB
dB
PSRR
Power Supply Rejection Ratio
V– = 0V, VCM = 1.5V, 2.7V < V + < 36V
●
85
110
dB
Minimum Operating Supply Voltage
AVOL
IS
Large-Signal Voltage Gain
Supply Current per Amplifier
2.4
●
RL = 1k, 1V < VOUT < 4V
RL = 6k
●
200
20
V + = 3V, RL = Open, VO = High
500
V/mV
V/mV
50
70
µA
µA
35
55
75
µA
µA
40
60
85
µA
µA
●
V + = 12V, RL = Open, VO = High
V
35
●
V + = 5V, RL = Open, VO = High
2.7
●
ISC–
Output Sink Current (Note 2)
VOVERDRIVE > 30mV
●
5
10
mA
ISC+
Output Source Current
VOVERDRIVE = 5mV, VOUT = 1V
●
60
110
µA
VOL
Output Voltage Swing Low
(Referred to V –)
ISINK = 0mA, VOVERDRIVE = –10mV
ISINK = 0.1mA
ISINK = 1mA
ISINK = 5mA
●
●
●
●
20
75
200
550
60
170
480
1200
mV
mV
mV
mV
VOH
Output Voltage Swing High
(Referred to V+)
ISOURCE = 0µA, VOVERDRIVE = –10mV
ISOURCE = 10µA
●
●
50
130
110
220
mV
mV
Leakage Current
VOUT = 40V, VOVERDRIVE > 100mV
●
1.7
5
µA
Propagation Delay
VOVERDRIVE > 100mV, RLOAD = 10k
6
9
µs
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)
SYMBOL
PARAMETER
CONDITIONS
MIN
VOS
Input Offset Voltage
– 14.5V < VCM < 14V
LT1716H
TYP
300
●
Input Offset Voltage Drift (Note 5)
IOS
Input Offset Current
VCM = 0V
VCM = 29V
VCM = – 15V
IB
Input Bias Current
VCM = 0V
VCM = 29V
VCM = – 15V
VCM = – 20V
Input Voltage Range (Note 7)
MAX
UNITS
1500
2900
µV
µV
µV/°C
●
2
●
●
●
3
280
0.9
1.3
nA
µA
µA
●
30
50
60
1400
nA
nA
●
●
●
6
3
1
20
30
1.4
µA
µA
mA
●
– 14.5
CMRR
Common Mode Rejection Ratio
– 14.5V < VCM < 14V
– 14.5V < VCM < 29V (Note 6)
●
●
85
70
110
93
dB
dB
PSRR
Power Supply Rejection Ratio
VS = ±1.35V to ±22V
●
80
110
dB
1000
●
500
50
Minimum Operating Supply Voltage
AVOL
Large-Signal Voltage Gain
2.4
●
RL = 6k; –14V < VOUT < 14V
RL = 6k; –13V < VOUT < 13V
14
2.7
V
V
V/mV
V/mV
IS
Supply Current
VS = ±15V, RL = Open, VO = High
ISC–
Output Sink Current (Note 2)
VOVERDRIVE > 30mV
●
5
10
mA
ISC+
Output Source Current
VOVERDRIVE = 5mV, VOUT = –14V
●
70
155
µA
VOL
Output Voltage Swing Low
(Referred to V –)
ISINK = 0mA, VOVERDRIVE = –10mV
ISINK = 0.1mA
ISINK = 1mA
ISINK = 5mA
●
●
●
●
20
75
200
550
70
170
480
1200
mV
mV
mV
mV
VOH
Output Voltage Swing High
(Referred to V +)
ISOURCE = 0µA, VOVERDRIVE = 10mV
ISOURCE = 10µA
●
●
45
140
120
250
mV
mV
Leakage Current
VOUT = 25V, VOVERDRIVE > 100mV
●
1.5
5
µA
Propagation Delay
VOVERDRIVE > 100mV, RLOAD = 10k
5.5
10
µs
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
40
95
µA
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 VCM = 44V above 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.
1716f
5
LT1716
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
vs Common Mode Voltage
1.0000
VS = ±15V
8
V+ = 15V
–
INPUT BIAS CURRENT (µA)
0.1000
25°C
85°C
6
IBIAS (µA)
1
125°C
–55°C
4
2
125°C
0
V = –15V
VCM = 0V
0.0100
CURRENT
OUT OF PIN
0.0010
0.0000
–0.0010
CURRENT
OUT OF PIN
5
0
+IN
–2
–3
10
15
VCM (V)
20
25
30
–0.0100
–50 –25
0
TRANSITION
REGION
1716 G02
VOL AT 125°C
VOL AT 85°C
1.2
VOL AT 25°C
0.8
VOL AT –55°C
0.4
V+ = 5V
V – = 0V
4.9
VOH AT –55°C
4.8
VOH AT 85°C, 125°C
VOH AT 25°C
4.7
4.6
8
125°C
6
85°C
4
INPUTS
EXCEED SUPPLY
–2
0
5
10 15 20 25 30 35 40 45 50
LOADING SOURCE CURRENT (µA)
100
90
1716 G06
Positive Supply Current
vs Output Sinking Current
1000
V + = 5V
V – = 0V
SUPPLY CURRENT (µA)
80
–55°C < TA < 125°C
–600
–800
70
OUTPUT LOW
60
50
40
OUTPUT HIGH
30
20
–1000
10 15 20 25 30 35 40 45 50
VCM (V)
1716 G05
V+ = 2.7V TO 44V
V – = 0V
–400
5
0
Supply Current vs Temperature
–200
–55°C
25°C
0
4.5
4 6 8 10 12 14 16 18 20
LOADING SINK CURRENT (mA)
Input Bias Current with Inputs
Driven Below the Supply
0
V + = 5V
V – = 0V
2
1716 G04
200
10
V+ = 5V
V – = 0V
POSITIVE SUPPLY CURRENT (µA)
2
0
5.0
Input Bias Current with Inputs
Driven Above the Supply
IBIAS (µA)
2.0
0
1716 G03
Output High Voltage
vs Source Current
OUTPUT HIGH VOLTAGE (RELATIVE TO V+) (V)
Output Low Voltage
vs Sink Current
1.6
–4
–0.2 –0.15 –0.1 –0.05 0 0.05 0.1 0.15 0.2
DIFFERENTIAL INPUT VOLTAGE (V)
25 50 75 100 125 150
TEMPERATURE (°C)
1716 G01
OUTPUT VOLTAGE (RELATIVE TO GND) (V)
–IN
–1
INPUTS
EXCEED SUPPLY
–2
IBIAS (µA)
V + = 15V
V – = –15V
0
V+ = 5V
V– = 0V
VCM = 2.5V
IBIAS CURRENT (nA)
10
Input Bias Current
vs Differential Input Voltage
Input Bias Current
vs Temperature
TA = 25°C
VS = ±15V
VS = 5V
100
10
–1200
–5
–4
–3
–2
VCM (V)
–1
0
1716 G07
0
–50 –25
10
0
25 50 75 100 125 150
TEMPERATURE (°C)
1716 G08
0.1
1
10
OUTPUT SINK CURRENT (mA)
100
1716 G09
1716f
6
LT1716
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Output Leakage Current
vs Output Voltage
0.6
V + = 5V
V – = 0V
TA = 25°C
0.5
400
350
300
OUTPUT CURRENT LIMIT (mA)
450
30
TA = 25°C
REVERSE CURRENT (mA)
0.4
0.3
0.2
0.1
250
0
10
5
15 20 25 30 35
OUTPUT VOLTAGE (V)
40
45
5
0
10
15
20
REVERSE VOLTAGE (V)
1716 G10
TOTAL SWITCHING TIME (µs)
OUTPUT SINKING LIMIT (mA)
100
25
20
15
10
VS = ±15V
RISE
10
VS = ±2.5V
FALL
5
1
–50 –25
0
10
TOTAL SUPPLY VOLTAGE (V)
100
TOTAL SWITCHING TIME (µs)
TOTAL SWITCHING TIME (µs)
100
FALL
RISE
VS = ±15V
FALL
VS = ±2.5V
RISE
40
1716 G15
0
25 50 75 100 125 150
TEMPERATURE (°C)
1716 G11
100
0
RL = 10k
VOUT = 90% VFINAL (RISE)
VOUT = 10% VFINAL (FALL)
VSTEP = 100mV
TA = 25°C
±15V
FALL TIME
10
±15V
RISE TIME
±2.5V
FALL TIME
1
25 50 75 100 125 150
TEMPERATURE (°C)
±2.5V
RISE TIME
0 10 20 30 40 50 60 70 80 90 100
OVERDRIVE (mV)
1716 G14
Response Time
VOUT = 90% VFINAL
VSTEP = 100mV
VOVERDRIVE = 10mV
TA = 25°C
VIN+
30V
26V
VS = ±15V
RISE
10
5V
VS = ±2.5V
RISE
RL = 100k
RL = 10k
VOUT
RL = OPEN
0V
1
1
10
20
30
TOTAL SUPPLY VOLTAGE (V)
5
Total Switching Time
vs Pull-Up Resistor
RL = 10k
VOUT = 90% VFINAL (RISE)
VOUT = 10% VFINAL (FALL)
VCM = 1/2 VTOTALSUPPLY
VSTEP = 100mV
VOVERDRIVE = 10mV
0
VS = ±15V
10
1716 G13
Total Switching Time
vs Total Supply Voltage
10
VS = 5V
15
Total Switching Time
vs Overdrive
RL = 10k
VOUT = 90% VFINAL (RISE)
VOUT = 10% VFINAL (FALL)
VSTEP = 100mV
VOVERDRIVE = 10mV
1716 G12
100
20
Total Switching Time
vs Temperature
OUTPUT SHORTED TO V +
TA = 25°C
1
25
1716 G27
Output Sinking Current
vs Total Supply Voltage
30
OUTPUT SHORTED TO V +
0
–50 –25
25
TOTAL SWITCHING TIME (µs)
OUTPUT LEAKAGE CURRENT (nA)
500
Output Sinking Current Limit
vs Temperature
Reverse Supply Current
1
100
1000
10
PULL-UP RESISTOR (kΩ)
10000
VS = 5V, 0V
TIME (µs)
VOD = 10mV
RL = 10k, 100k, OPEN
VIN+ = 26V TO 30V
VIN– = 29.99V
1716 G17
1716 G16
1716f
7
LT1716
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Response Time
VIN+
Response Time
30V
VIN+
26V
Response Time
25V
VIN+ 25V
21V
15V
21V
15V
RL = 10k, 100k
VOUT
VOUT
RL = OPEN
–15V
5V
–15V
VOUT
0V
TIME(µs)
VS = 5V, 0V
VOD = 10mV
RL = 10k, 100k, OPEN
VIN+ = 30V TO 26V
VIN– = 26.01V
VS = ±15V
TIME(µs)
VOD = 10mV
RL = 10k, 100k, OPEN
VIN+ = 21V TO 25V
VIN– = 24.99V
1716 G18
Response Time
Response Time
VIN+ 0V
–100mV
15V
5V
RL = 100k
VOUT
RL = OPEN
1716 G20
Response Time
2.6V
VOUT VIN+
5V
2.5V
VIN+ 2.5V
2.4V
RL = 10k
VS = ±15V
TIME(µs)
VOD = 10mV
RL = 10k, 100k, OPEN
VIN+ = 25V TO 21V
VIN– = 21.01V
1716 G19
RL = 10k, 100k
VOUT
RL = OPEN
0V
–15V
0V
TIME(µs)
VS = 5V
VOD = 10mV
RL = 10k, 100k, OPEN
VIN+ = 2.4V TO 2.5V
VIN– = 2.49V
TIME(µs)
VS = 5V
VOD = 10mV
RL = 10k, 100k, OPEN
VIN+ = 2.6V TO 2.5V
VIN– = 2.51V
1716 G21
Below VS– Fault (Rising)
Response Time
VIN+
TIME(µs)
VS = ±15V
VOD = 10mV
RL = 10k, 100k, OPEN
VIN+ = –100mV TO 0V
VIN– = –10mV
1716 G22
Below VS– Fault (Falling)
–14.9V
VIN+
–19V
15V
100mV
0V
15V
–14.9V
VIN+
–19V
15V
RL = 10k, 100k
VOUT
VOUT
1716 G23
VOUT
RL = OPEN
–15V
–15V
VS = ±15V
TIME(µs)
VOD = 10mV
RL = 10k, 100k, OPEN
VIN+ = 110mV TO 0mV
VIN– = 10mV
1716 G24
–15V
TIME(µs)
VS = ±15V
RL = 10k, 100k, OPEN
VIN+ = –19V TO –14.9V
VIN– = –15V
1716 G25
TIME(µs)
VS = ±15V
RL = 10k, 100k, OPEN
VIN+ = –14.9V TO –19V
VIN– = –15V
1716 G26
1716f
8
LT1716
U
W
U
U
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
10
VEE
3µA
R3
60k
Q11
R4
30k
VCC
Q21
IN +
Q7
IN –
R2
5k
R1
5k
A
A
Q4
Q6
B
Q20
Q3
D2
Q5
B
D1
D3
R5
Q1 Q2
Q12
D4
Q15
D5
R8
Q16
Q61
Q53
Q62
Q17
Q35
Q18
D6
Q39
R6
Q34
Q33
Q13
R9
Q10
R7
Q14
R10
Q25
Q22
Q8
R11
Q9
Q24
Q23
Q36
Q31
Q37
Q32
Q38
D8
Q26
Q28
Q27
1716 SS
D7
Q30
Q29
OUT
LT1716
W
W
SI PLIFIED SCHE ATIC
1716f
LT1716
U
PACKAGE DESCRIPTIO
S5 Package
5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
0.62
MAX
0.95
REF
2.90 BSC
(NOTE 4)
1.22 REF
1.4 MIN
3.85 MAX 2.62 REF
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45 TYP
5 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
0.01 – 0.10
1.00 MAX
DATUM ‘A’
0.30 – 0.50 REF
0.09 – 0.20
(NOTE 3)
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
1.90 BSC
S5 TSOT-23 0302
1716f
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
LT1716
U
TYPICAL APPLICATIO S
Overcurrent Flag
4.5V TO 44V
0.1µF
LT1634-1.25
113k
1%
11.8k
1%
3V
4
10M
1%
RS
CMPD6263
1
LT1716
3
10.7k
1%
LOAD
5
–
+
2
10M
1%
OVERCURRENT
IMAX =
0.1
RS
1716 TA03
Charge/Discharge Indicator
0.1Ω
3V TO 44V
CHARGE
CURRENT
+
–
LOAD
VCHARGER
3V
681Ω
1%
4
1M
1%
681Ω
1%
–
0.1µF
5
CMPD6263
1
LT1716
3
+
2
CHARGE
1M
1%
1716 TA04
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1716f
12
Linear Technology Corporation
LT/TP 0503 1K • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2002