Linear LT1716 Schematic [ru]

SOT-23, 44V, Over-the-Top,

Micropower, Precision

Rail-to-Rail Comparator

FEATURES DESCRIPTION

n

Operates from 2.7V to 44V

n

Over-The-Top®: Input Common Mode Range

Extends 44V Above V

n

Micropower: 35μA I

n

Offset Voltage: 1.5mV Max

n

Valid Output with Either Input 5V Below V

n

Rail-to-Rail Output Swing

n

Output Can Drive Loads Above V

n

Internal Pull-Up Current

n

–40°C to 125°C Operating Temperature Range

n

Low Profi le (1mm) SOT-23 (ThinSOT™) Package

–

, Independent of V

Q

+

+

–

APPLICATIONS

n

Power Supply Monitors

n

Relay/Lamp Driver

n

Oscillators

n

Peak Detector

n

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
(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
pull-up 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.

L, LT, LTC, LTM, Over-The-Top, Linear Technology and the Linear logo 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.

LT1716

–

, independent of V+ supply.

TYPICAL APPLICATION

Lamp Monitor

3V

1M

5

4

–

LT1716 LAMP GOOD

3

+

2

1716 TA01

LAMP

ON/OFF

0.15Ω

0.25A TO 2.5A

5V TO 44V

100k

R

S

1W

5k

RS ≥

CMPD6001

0.04

I

L

0.1μF

Input Bias Current vs Input Bias Voltage

12μ

VS = 5V, 0V

8μ

INPUT

4μ

BELOW

6n

SUPPLY

3n

0

(A)

1

–

+IN = 2V +IN = 2V

B

–3n

I

–6n

–100m

–0.5m

–1m

–1.5m

–5 0 5 10 15 20 45

–10

INPUT

ABOVE

SUPPLY

V

+IN = 10V

–

(V)

IN

1716 TA02

1716fa

1

LT1716

PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS

(Note 1)

Supply Voltage (V+ to V–) .........................................44V

Differential Input Voltage ..........................................44V

Input Voltage .....................................................44V, –5V

Output Short-Circuit Duration (Note 2) ............ Indefi nite

Operating Temperature Range (Note 3)

LT1716C/LT1716I ................................ –40°C to 85°C

LT1716H ............................................ –40°C to 125°C

OUT

+IN

TOP VIEW

1

–

2

V

3

5-LEAD PLASTIC TSOT-23

T

= 150°C, θJA = 250°C/W

JMAX

–

+

S5 PACKAGE

54V

+

–IN

Specifi ed 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

ORDER INFORMATION

LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE

LT1716CS5#PBF LT1716CS5#TRPBF LTYD 5-Lead Plastic TSOT-23 –40°C to 85°C

LT1716IS5#PBF LT1716IS5#TRPBF LTYD 5-Lead Plastic TSOT-23 –40°C to 85°C

LT1716HS5#PBF LT1716HS5#TRPBF LTYD 5-Lead Plastic TSOT-23 –40°C to 125°C

Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.

For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:

http://www.linear.com/leadfree/

http://www.linear.com/tapeandreel/

ELECTRICAL CHARACTERISTICS

The l denotes the specifi cations which apply over the full operating
temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifi cations are at TA = 25°C. Single supply operation V+ = 5V, V– = 0V;
VCM = V+/2 unless otherwise noted. (Note 4)

LTC1716C/LT1716I

SYMBOL PARAMETER CONDITIONS

V

OS

I

OS

I

B

CMRR Common Mode Rejection Ratio 0.5V ≤ V

Input Offset Voltage 0.5V < VCM < (VCC – 1V)

Input Offset Voltage Drift (Note 5) 0°C < T

Input Offset Current VCM = V+/2

Input Bias Current VCM = V+/2

Input Voltage Range (Note 7)

0°C < T

< 70°C

A

–40°C < T

–40°C < T

V

CM

VCM = 44V

+

V
V

CM

V

CM

V

CM

0.5V ≤ V

< 85°C

A

< 70°C

A

< 85°C

A

= 0V

= 0V, VCM = 44V

= 0V
= 44V
= –5V

< (V+ – 1V)

CM

< 44V (Note 6)

CM

l
l

l
l

l
l
l

l

l
l
l

l

0.5 44 V

l

89

l

81

300 1600

2
2

315

20
35

2
3
6
1

110
110

2100
2500

1.3

0.9
50

75

13

9

1.4

2

UNITSMIN TYP MAX

μV
μV
μV

μV/°C
μV/°C

nA
μA
μA

nA
nA

nA
μA
μA

mA

dB
dB

1716fa

LT1716

ELECTRICAL CHARACTERISTICS

The l denotes the specifi cations which apply over the full operating
temperature range of –40°C ≤ T
VCM = V+/2 unless otherwise noted. (Note 4)

SYMBOL PARAMETER CONDITIONS

PSRR Power Supply Rejection Ratio V

Minimum Operating Supply Voltage

A

VOL

I

S

–

I

SC

+

I

SC

V

OL

V

OH

Large-Signal Voltage Gain RL = 1k; 1V < V

Supply Current V+ = 3V, RL = Open, VO = High

Output Sink Current (Note 2) V
Output Source Current V
Output Voltage Swing Low

(Referred to V

Output Voltage Swing High
(Referred to V

Leakage Current V
Propagation Delay V

≤ 85°C, otherwise specifi cations are at TA = 25°C. Single supply operation V+ = 5V, V– = 0V;

A

LTC1716C/LT1716I

–

= 0V, VCM = 1.5V; 2.7V < V+ < 36V

< 4V

OUT

l

95 110 dB

l

200

l

100

2.4 2.7 V
500 V/mV

35 50

l

+

V

= 5V, RL = Open, VO = High

l

+

V

= 12V, RL = Open, VO = High

OVERDRIVE

OVERDRIVE

I

–

)

+

)

SINK

I

SINK

I

SINK

I

SINK

I

SOURCE

I

SOURCE

OUT

OVERDRIVE

> 30mV
= 5mV, V

= 0mA, V
= 0.1mA
= 1mA
= 5mA

= 0μA, V
= 10μA

= 40V, V

> 100mV, R

OUT

OVERDRIVE

OVERDRIVE

OVERDRIVE

= 1V

= –10mV

= 10mV

> 100mV

= 10k 3 5.5 μs

LOAD

l

l

10 20 mA

l

60 85 μA

l
l
l
l

l
l

l

35 55

40 60

20

75
200
550

30
130

0.5 2 μA

65

75

85

35
110
300
900

55
185

UNITSMIN TYP MAX

V/mV

μA
μA

μA
μA

μA
μA

mV
mV
mV
mV

mV
mV

The l denotes the specifi cations which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifi cations
are at TA = 25°C. Split supply operation VS = ±15V, VCM = 0V unless otherwise noted. (Note 4)

LT1716C/LT1716I

SYMBOL PARAMETER CONDITIONS

V

OS

Input Offset Voltage –14.5V < VCM < 14V

0°C < T

< 70°C

A

–40°C < T

< 85°C

A

Input Offset Voltage Drift (Note 5) 0°C < TA < 70°C

–40°C < T

I

OS

Input Offset Current VCM = 0V

< 85°C

A

VCM = 29V
V

= –15V

CM

I

B

Input Bias Current VCM = 0V

= 29V

V

CM

V

= –15V

CM

V

= –20V

CM

Input Voltage Range (Note 7)

CMRR Common Mode Rejection Ratio –14.5V < V

–14.5V < V

PSRR Power Supply Rejection Ratio V

S

CM
CM

= ±1.35V to ±22V

Minimum Operating Supply Voltage

A

VOL

I

S

–

I

SC

+

I

SC

Large-Signal Voltage Gain RL = 6k; –14V < V

Supply Current VS = ±15V, RL = Open, VO = High
Output Sink Current (Note 2) V
Output Source Current V

OVERDRIVE

OVERDRIVE

> 30mV
= 5mV, V

< 14V
< 29V (Note 6)

< 14V

OUT

= –14V

OUT

l
l

l
l

l
l
l

2
2

315

30

l

l
l
l

l

–14.5 14 V

l

92

l

81

l

90 110 dB

l

500

l

400

l

l

10 20 mA

l

70 105 μA

50

6
3
1

110

98

2.4 2.7 V

1000 V/mV

40 95 μA

2000
2400

0.9

1.3
60

100

9

13

1.4

300 1500

UNITSMIN TYP MAX

μV
μV
μV

μV/°C
μV/°C

nA
μA
μA

nA
nA

μA
μA

mA

dB
dB

V/mV

1716fa

3

LT1716

The l denotes the specifi cations which apply over the full operating

ELECTRICAL CHARACTERISTICS

temperature range of –40°C ≤ T
unless otherwise noted. (Note 4)

SYMBOL PARAMETER CONDITIONS

V

OL

Output Voltage Swing Low
(Referred to V

V

OH

Output Voltage Swing High
(Referred to V

Leakage Current V
Propagation Delay V

The l denotes the specifi cations which apply over the full operating temperature range of –40°C < TA < 125°C, otherwise specifi cations
are at TA = 25°C. Single supply operation V+ = 5V, V– = 0V; VCM = VCC/2 unless otherwise noted. (Note 4)

SYMBOL PARAMETER CONDITIONS

V

OS

I

OS

I

B

CMRR Common Mode Rejection Ratio 0.5V < V

PSRR Power Supply Rejection Ratio V

A

VOL

I

S

–

I

SC

+

I

SC

V

OL

V

Output Voltage Swing High

OH

Input Offset Voltage 0.5V < VCM < (VCC – 1V)

Input Offset Voltage Drift (Note 5)
Input Offset Current VCM = V+/2

Input Bias Current VCM = V+/2

Input Voltage Range (Note 7) 0.5 44 V

Minimum Operating Supply Voltage
Large-Signal Voltage Gain RL = 1k, 1V < V

Supply Current per Amplifi er V+ = 3V, RL = Open, VO = High

Output Sink Current (Note 2) V
Output Source Current V
Output Voltage Swing Low

(Referred to V

(Referred to V
Leakage Current V
Propagation Delay V

≤ 85°C, otherwise specifi cations are at TA = 25°C. Split supply operation VS = ±15V, VCM = 0V

A

LT1716C/LT1716I

= 0mA, V

I

–

)

+

)

SINK

I

= 0.1mA

SINK

I

= 1mA

SINK

I

= 5mA

SINK

I

SOURCE

I

SOURCE

= 25V, V

OUT

OVERDRIVE

OVERDRIVE

= 0μA, V
= 10μA

OVERDRIVE

> 100mV, R

= –10mV

OVERDRIVE

> 100mV

LOAD

= 10mV

= 10k 5.5 9 μs

l
l
l
l

l
l

l

20

75
200
550

45
140

0.6 2 μA

LT1716H

300 1600

l

V
V

CM
CM

= 0V
= 44V

l

l
l
l

2μV/°C
3 220

20 50

l

+

= 0V, VCM = 44V

V
V

= 0V

CM

V

= 44V

CM

V

= –5V

CM

< (V+ – 1V)

CM

0.5V < V

–

R

L

< 44V (Note 6)

CM

= 0V, VCM = 1.5V, 2.7V < V+ < 36V

< 4V

OUT

= 6k

l
l
l

l

75

l

72

l

85 110 dB

l

200

l

20

2
3
6
1

110
110

2.4 2.7 V

500 V/mV

35 50

l

+

= 5V, RL = Open, VO = High

V

+

= 12V, RL = Open, VO = High

V

OVERDRIVE

OVERDRIVE

I

–

)

+

)

SINK

I

SINK

I

SINK

I

SINK

I

SOURCE

I

SOURCE

OUT

OVERDRIVE

> 30mV
= 5mV, V

= 0mA, V
= 0.1mA
= 1mA
= 5mA

= 0μA, V
= 10μA

= 40V, V

> 100mV, R

OUT

OVERDRIVE

OVERDRIVE

OVERDRIVE

= 1V

= –10mV

= –10mV

> 100mV

= 10k 6 9 μs

LOAD

l

l

l

510 mA

l

60 110 μA

l
l
l
l

l
l

l

35 55

40 60

20

75

200
550

50

130

1.7 5 μA

35
110
300
900

75
210

2900

1.3

0.9

900

25

14

1.4

70

75

85

60
170
480

1200

110
220

UNITSMIN TYP MAX

mV
mV
mV
mV

mV
mV

UNITSMIN TYP MAX

μV
μV

nA
μA
μA

nA
nA

nA
μA
μA

mA

dB
dB

V/mV

μA
μA

μA
μA

μA
μA

mV
mV
mV
mV

mV
mV

1716fa

4

LT1716

The l denotes the specifi cations which apply over the full operating

ELECTRICAL CHARACTERISTICS

temperature range of –40°C < T
unless otherwise noted. (Note 4)

SYMBOL PARAMETER CONDITIONS

V

OS

I

OS

I

B

CMRR Common Mode Rejection Ratio –14.5V < V

PSRR Power Supply Rejection Ratio VS = ±1.35V to ±22V

A

VOL

I

S

–

I

SC

+

I

SC

V

OL

V

OH

Input Offset Voltage –14.5V < VCM < 14V

Input Offset Voltage Drift (Note 5)

Input Offset Current VCM = 0V

Input Bias Current VCM = 0V

Input Voltage Range (Note 7)

Minimum Operating Supply Voltage

Large-Signal Voltage Gain RL = 6k; –14V < V

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
(Referred to V

Output Voltage Swing High
(Referred to V

Leakage Current V

Propagation Delay V

< 125°C, otherwise specifi cations are at TA = 25°C. Split supply operation VS = ±15V, VCM = 0V

A

LT1716H

300 1500

l

V

CM

V

CM

= 29V
= –15V

l

l
l
l

2 μV/°C

3 280

30

l

VCM = 29V
V

= –15V

CM

V

= –20V

CM

< 14V

–14.5V < V

R

L

OVERDRIVE

OVERDRIVE

I

–

)

+

)

SINK

I

SINK

I

SINK

I

SINK

I

SOURCE

I

SOURCE

OUT

OVERDRIVE

CM

< 29V (Note 6)

CM

= 6k; –13V < V

> 30mV

= 5mV, V

= 0mA, V

OVERDRIVE

= 0.1mA
= 1mA
= 5mA

= 0μA, V
= 10μA

= 25V, V

OVERDRIVE

> 100mV, R

< 14V

OUT

< 13V

OUT

= –14V

OUT

= –10mV

OVERDRIVE

> 100mV

LOAD

= 10mV

= 10k 5.5 10 μs

l
l
l

l

–14.5 14 V

l

85

l

70

l

80 110 dB

l

500501000 V/mV

l

l

510 mA

l

70 155 μA

l
l
l
l

l
l

l

50

6
3
1

110

93

2.4 2.7 V

20

75
200
550

45
140

1.5 5 μA

2900

0.9

1.3

60

1400

20
30

1.4

70
170
480

1200

120
250

UNITSMIN TYP MAX

μV
μV

nA
μA
μA

nA
nA

μA
μA

mA

dB
dB

V/mV

mV
mV
mV
mV

mV
mV

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 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 specifi ed 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 specifi ed performance
from –40°C to 85°C. The LT1716H is guaranteed to meet specifi ed
performance from –40°C to 125°C.

Note 5: This parameter is not 100% tested.
Note 6: Typical input offset voltage of 500μV at V

maximum input offset voltage of 4mV at V

CM

= 44V above V– and a

CM

= 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.

1716fa

5

LT1716

TYPICAL PERFORMANCE CHARACTERISTICS

Input Bias Current
vs Common Mode Voltage

10

VS = ±15V

8

25°C

85°C

–55°C

INPUTS
EXCEED SUPPLY

(μA)

BIAS

I

6

4

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

0.4

OUTPUT VOLTAGE (RELATIVE TO GND) (V)

0

VOL AT 125°C

VOL AT 85°C

VOL AT 25°C

VOL AT –55°C

0

2 4 6 8 10 12 14 16 18 20

LOADING SINK CURRENT (mA)

125°C

1716 G01

V+ = 5V

–

= 0V

V

1716 G04

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

–25 25

V+ = 15V

–

= –15V

V

= 0V

V

CM

CURRENT

OUT OF PIN

050

TEMPERATURE (°C)

Output High Voltage
vs Source Current

5.0

) (V)

+

4.9

4.8

4.7

4.6

OUTPUT HIGH VOLTAGE (RELATIVE TO V

4.5
0

5 10 15 20 25 30 35 40 45 50

VOH AT –55°C

VOH AT 85°C, 125°C

VOH AT 25°C

LOADING SOURCE CURRENT (μA)

Input Bias Current
vs Differential Input Voltage

1

0

V+ = 5V

–

= 0V

V

= 2.5V

V

CM

100

75

125

150

1716 G02

–1

CURRENT (nA)

–2

BIAS

I

–3

–4

–0.2

–0.15 –0.1

DIFFERENTIAL INPUT VOLTAGE (V)

V+ = 15V

–

= –15V

V

–IN +IN

TRANSITION
REGION

0

–0.05 0.05 0.2

0.1 0.15

1716 G03

Input Bias Current with Inputs
Driven Above the Supply

(μA)

BIAS

I

10

V+ = 5V

–

= 0V

V

8

6

4

2

0

–2

0

51015 20 25 30 35 40 45 50

125°C

85°C

25°C

INPUTS
EXCEED SUPPLY

VCM (V)

–55°C

1716 G06

V+ = 5V

–

= 0V

V

1716 G05

Input Bias Current with Inputs
Driven Below the Supply Supply Current vs Temperature

–200

–400

(μA)

–600

BIAS

I

–800

–1000

–1200

200

V+ = 2.7V TO 44V

–

= 0V

V

0

–55°C < TA < 125°C

–5

–4 –3 –2 –1 0

VCM (V)

1716 G07

100

V+ = 5V

–

90

= 0V

V

80

70

60

50

40

30

SUPPLY CURRENT (μA)

20

10

0

–50

–25 25

OUTPUT LOW

0

TEMPERATURE (°C)

OUTPUT HIGH

6

Positive Supply Current
vs Output Sinking Current

1000

TA = 25°C

100

POSITIVE SUPPLY CURRENT (μA)

125

50

100

75

150

1716 G08

10

0.1

VS = ±15V

1 10 100

OUTPUT SINK CURRENT (mA)

VS = 5V

1716 G09

1716fa

TYPICAL PERFORMANCE CHARACTERISTICS

LT1716

Output Leakage Current
vs Output Voltage Reverse Supply Current

500

V+ = 5V

–

= 0V

V

= 25°C

T

A

450

400

350

300

OUTPUT LEAKAGE CURRENT (nA)

250

5

10 15 20 25 30 35 40 45

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)

10 100

1716 G10

+

1716 G12

0.6

TA = 25°C

0.5

0.4

0.3

0.2

REVERSE CURRENT (mA)

0.1

0

0

5 10 15 20 25

REVERSE VOLTAGE (V)

Total Switching Time
vs Temperature

100

VS = ±15V

RISE

10

VS = ±2.5V

–50 –25

FALL

0

25 75

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

FINAL
FINAL

= 10mV

100

1716 G27

(RISE)
(FALL)

125

1716 G13

30

25

20

15

10

OUTPUT CURRENT LIMIT (mA)

5

0

–50

100

10

TOTAL SWITCHING TIME (μs)

150

1

Output Sinking Current Limit
vs Temperature

OUTPUT SHORTED TO V

VS = ±15V

050

–25 25

TEMPERATURE (°C)

+

VS = 5V

75

100

Total Switching Time
vs Overdrive

RL = 10k

= 90% V

V

OUT

V

OUT

V

STEP

= 25°C

T

A

±2.5V

FALL TIME

±2.5V

RISE TIME

20 100

10

0

40

50

30

OVERDRIVE (mV)

= 10% V

= 100mV

FALL TIME

RISE TIME

FINAL
FINAL

±15V

±15V

807060

125

1716 G11

(RISE)
(FALL)

90

1716 G14

150

Total Switching Time
vs Total Supply Voltage

100

RL = 10k

= 90% V

V

OUT

V

OUT

V

CM

V

STEP

V

OVERDRIVE

10

TOTAL SWITCHING TIME (μs)

1

0

FINAL

= 10% V

FINAL

= 1/2 V

TOTALSUPPLY

= 100mV

= 10mV

10

TOTAL SUPPLY VOLTAGE (V)

(RISE)
(FALL)

FALL

RISE

20

Total Switching Time
vs Pull-Up Resistor Response Time

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

100 1000 10000

PULL-UP RESISTOR (k)

1716 G16

30V

+

V

IN

26V

5V

R

= 100k

L

V

OUT

RL = 10k

0V

= 5V, 0V

S

= 10mV

V

OD

= 10k, 100k, OPEN

R

L

+

= 26V TO 30V

V

IN

–

= 29.99V

V

IN

= OPEN

R

L

TIME (μs)V

1716 G17

1716fa

7

LT1716

TYPICAL PERFORMANCE CHARACTERISTICS

Response Time Response Time Response Time

30V

+

V

IN

26V

5V

V

OUT

0V

= 5V, 0V

S

V

= 10mV

OD

= 10k, 100k, OPEN

R

L

+

= 30V TO 26V

V

IN

–

= 26.01V

V

IN

TIME (μs)V

Response Time Response Time Response Time

2.5V V

+

V

IN

2.4V

RL = 10k RL = 100k

R

= OPEN

L

= ±15V

S

= 10mV

V

OD

= 10k, 100k, OPEN

R

L

+

= 2.4V TO 2.5V

V

IN

–

= 2.49V

V

IN

TIME (μs)V

1716 G18

1716 G21

25V

+

V

IN

21V
15V

V

OUT

RL = 10k, 100k

R

L

= OPEN

–15V

= ±15V

S

= 10mV

V

OD

= 10k, 100k, OPEN

R

L

+

= 21V TO 25V

V

IN

–

= 24.99V

V

IN

2.6V

+

OUT

V

IN

5V

2.5V

TIME (μs)V

1716 G19

5V

V

OUT

0V

V

IN

V

OUT

V

IN

–100mV

V

OUT

+

–15V

+

–15V

25V
21V
15V

0V

15V

= ±15V

S

= 10mV

V

OD

= 10k, 100k, OPEN

R

L

+

= 25V TO 21V

V

IN

–

= 21.01V

V

IN

RL = 10k, 100k

TIME (μs)V

= OPEN

R

L

1716 G20

0V

= 5V

S

= 10mV

V

OD

= 10k, 100k, OPEN

R

L

+

= 2.6V TO 2.5V

V

IN

–

= 2.51V

V

IN

TIME (μs)V

1716 G22

= ±15V

S

= 10mV

V

OD

= 10k, 100k, OPEN

R

L

+

= –100mV TO 0V

V

IN

–

= –10mV

V

IN

TIME (μs)V

1716 G23

V

IN

V

8

Response Time Below V

100mV

+

OUT

15V

–15V

0V

S

V

OD

R

L

V

IN

V

IN

= ±15V

= 10mV

= 10k, 100k, OPEN

+

= 110mV TO 0mV

–

= 10mV

TIME (μs)V

V

1716 G24

IN

V

–14.9V

+

OUT

–19V

15V

–15V

S

R

L

V

IN

V

IN

–

Fault (Rising) Below V

S

RL = 10k, 100k

= ±15V
= 10k, 100k, OPEN

+

= –19V TO –14.9V

–

= –15V

–

Fault (Falling)

S

–14.9V

+

V

IN

–19V

15V

V

= OPEN

R

L

OUT

–15V

TIME (μs)V

1716 G25

= ±15V

S

= 10k, 100k, OPEN

R

L

+

= –14.9V TO –19V

V

IN

–

= –15V

V

IN

TIME (μs)V

1716 G26

1716fa

APPLICATIONS INFORMATION

LT1716

The LT1716 comparator features low power operation
with exceptional input precision with rail-to-rail input and
output swing. The comparator operates fl awlessly 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
can be forced up to 5V below V

. If one input is within this range, the other input

–

without phase reversal

occuring at the output.

The LT1716 has three stages—NPN, PNP and common
base (see Simplifi ed 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 fl ows 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
fl owing 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

+

, the NPN transistor is fully saturated and the input bias

V

. At about 0.3V above

current is typically 4μA at room temperature. The input
offset voltage is typically 500μV when operating above

+

. The LT1716 will operate with its input 44V above V–,

V
regardless of V

+

.

The transition to the negative common mode input stage

–

occurs at 0.3V above V
stage is active. When the inputs are 0.3V below V

. Above this trip point the PNP

–

, the
common base input stage is active in addition to the PNP
stage. The input bias current out of each input becomes

/5kΩ. The LT1716 is designed to operate when either

V

IN

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

.

,

1716fa

9

LT1716

SIMPLIFIED SCHEMATIC

Q29

Q28D8

OUT

Q30

D7

Q26 Q27

Q38

Q37

1716 SS

Q31 Q32

Q23

Q22

R7

D6D2D1

R8 R6

Q12 Q13

R5

Q24

Q25

Q14

Q53

D5

Q2

Q9

Q8

Q10

Q33

Q39

Q18

Q17Q16Q15

Q61

Q6BA

Q36

R9 R10 R11

Q34

Q35

Q62

D4D3

10

Q3 Q4 Q1

5k

R1

R4

Q11

30k

CC

V

R3

60k

R2

–

IN

Q7

B

Q5

5k

+

IN

Q20

A

Q21

3μA

EE

V

1716fa

PACKAGE DESCRIPTION

LT1716

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)

1.00 MAX

PIN ONE

0.95 BSC

0.80 – 0.90

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.

1716fa

11

LT1716

TYPICAL APPLICATIONS

Overcurrent Flag

4.5V TO 44V

R

S

LOAD

3V TO 44V

LT1634-1.25

11.8k
1%

10.7k
1%

CHARGE

CURRENT

681Ω

0.1μF

113k
1%

10M
1%

5

4

–

LT1716 OVERCURRENT

3

+

1

2

10M

1%

Charge/Discharge Indicator

0.1Ω

+

CHARGER

–

3V

5

–

LT1716 CHARGE

+

2

1M

1%

1%

1%

1M

LOAD V

681Ω
1%

4

3

3V

CMPD6263

I

1

MAX

0.1

=

R

S

0.1μF

CMPD6263

1716 TA03

1716 TA04

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Linear Technology Corporation

12

1630 McCarthy Blvd., Milpitas, CA 95035-7417

[phone] ● FAX: [phone]

●

www.linear.com

Input Offset

MAX

Input Offset

MAX

LT 0809 REV A • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 2002

1716fa