LT6700HS6-1#TRMPBF - ANALOG DEVICES

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Micropower, Low Voltage,

Dual Comparator with

400mV Reference

The LT

6700/LT6700HV combine two micropower, low

voltage comparators with a 400mV reference in a 6-lead

SOT-23 or 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 comparators, easing design requirements

to insure stable output operation.

The comparators each have one input available externally;

the other inputs are connected internally to the reference.

The comparator outputs are open collector and the output

load can be referred to any voltage up to 18V (36V for

LT6700HV), independent of supply voltage. The output

stage sinking capability is guaranteed to be greater than

5mA over temperature.

The three versions of this part differ by the polar-

ity of the available comparator inputs. The LT6700-1/

LT6700HV-1 has one inverting input and one noninvert-

ing input, making it suitable for use as a window com-

parator. The LT6700-2/LT6700HV-2 has two inverting

inputs and the LT6700-3/LT6700HV-3 has two nonin-

verting inputs. All versions are offered in commercial,

industrial and automotive temperature ranges.

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

trademarks and ThinSOT and PowerPath are trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

Micropower Battery Monitor

n Internal 400mV Reference

n Total Threshold Error: ±1.25% Max at 25°C

n Inputs and Outputs Operate to 36V

n Wide Supply Range: 1.4V to 18V

n Specified for –55°C to 125°C Temperature Range

n Low Quiescent Current: 6.5µA Typ at 5V

n Internal Hysteresis: 6.5mV Typ

n Low Input Bias Current: ±10nA Max

n Over-The-Top

Input also Includes Ground

n Open-Collector Outputs Allow Level Translation

n Choice of Input Polarities: LT6700-1/LT6700-2/

LT6700-3/LT6700HV-1/LT6700HV-2/LT6700HV-3

n Available in Low Profile (1mm) SOT-23 (ThinSOT™)

and 2mm × 3mm DFN Packages

n Battery-Powered System Monitoring

n Threshold Detectors

n Window Comparators

n Relay Driving

n Industrial Control Systems

n Handheld Instruments

n Automotive Monitor and Controls

Comparator Thresholds

vs Temperature

–

COMP B

COMP A

ALKALINE

AA CELLS VR = 400mV

REFERENCE

0.1µF

LT6700-3

63.4k

261k

VBATT > 1.6V

VBATT > 2V

MONITOR CONSUMES ~10µA

HYSTERESIS IS APPROXIMATELY

2% OF TRIP VOLTAGE

6700123 TA01

VBATT

1.4V (MIN)

3V (NOM)

+VS

TEMPERATURE (°C)

–60

THRESHOLD VOLTAGE (mV)

398

400

402

120

6700123 TA02

396

394

390

–40 –20 0 20 40 60 80 100

392

406

404

TWO TYPICAL PARTS

COMP A AND B

VS = 5V

#1A

#1B

#2A

#2B

RISING INPUT

FALLING INPUT

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

ABSOLUTE MAXIMUM RATINGS

Total Supply Voltage (VS to GND) ..........................18.5V

Input Voltage (+IN, –IN)

LT6700 (Note 3) .......................... 18.5V to (GND – 0.3V)

LT6700HV (Note 3) ........................ 40V to (GND – 0.3V)

LT6700 Output Voltage (OUT) ..... 18.5V to (GND – 0.3V)

LT6700HV Output Voltage (OUT) ... 40V to (GND – 0.3V)

Output Short-Circuit Duration (Note 2) ............ Indeﬁnite

Input Current (Note 3) .......................................... –10mA

Operating Temperature Range (Note 4)

LT6700CS6/LT6700HVCS6/

LT6700CDCB-1/-2/-3 ...........................–40°C to 85°C

LT6700IS6/LT6700HVIS6/

LT6700IDCB-1/-2/-3 ............................ –40°C to 85°C

LT6700HS6/LT6700HVHS6/

LT6700HDCB-1/-2/-3 ........................ –40°C to 125°C

LT6700MPDCB/

LT6700MPS6-1/-2/-3 ......................... –55°C to 125°C

(Note 1)

PIN CONFIGURATION

Speciﬁed Temperature Range (Note 5)

LT6700CS6/LT6700HVCS6/

LT6700CDCB-1/-2/-3 .............................. 0°C to 70°C

LT6700IS6/LT6700HVIS6/

LT6700IDCB-1/-2/-3 ............................ –40°C to 85°C

LT6700HS6/LT6700HVHS6/

LT6700HDCB-1/-2/-3 ....................... –40°C to 125°C

LT6700MPDCB/

LT6700PMS6-1/-2/-3 ......................... –55°C to 125°C

Maximum Junction Temperature

S6 Package ....................................................... 150°C

DCB6 Package .................................................. 150°C

Storage Temperature Range

S6 Package ........................................ –65°C to 150°C

DCB6 Package ................................... –65°C to 150°C

Lead Temperature, TSOT-23 (Soldering, 10 sec) ... 300°C

LT6700-1

LT6700HV-1

LT6700-2

LT6700HV-2

LT6700-3

LT6700HV-3

OUTA 1

GND 2

+INA 3

6 OUTB

5 VS

4 –INB

TOP VIEW

S6 PACKAGE

6-LEAD PLASTIC TSOT-23

TJMAX = 150°C, θJA = 230°C/W

OUTA 1

GND 2

–INA 3

6 OUTB

5 VS

4 –INB

TOP VIEW

S6 PACKAGE

6-LEAD PLASTIC TSOT-23

TJMAX = 150°C, θJA = 230°C/W

OUTA 1

GND 2

+INA 3

6 OUTB

5 VS

4 +INB

TOP VIEW

S6 PACKAGE

6-LEAD PLASTIC TSOT-23

TJMAX = 150°C, θJA = 230°C/W

LT6700-1 LT6700-2 LT6700-3

TOP VIEW

+ INA

GND

–INB

OUTA

OUTB

DCB6 PACKAGE

6-LEAD (2mm × 3mm) PLASTIC DFN

TJMAX = 125°C, θJA = 64°C/W

SOLDERED EXPOSED PAD (PIN 7)

INTERNALLY CONNECTED TO GND

(PCB CONNECTION OPTIONAL)

TOP VIEW

– INA

GND

–INB

OUTA

OUTB

DCB6 PACKAGE

6-LEAD (2mm × 3mm) PLASTIC DFN

TJMAX = 125°C, θJA = 64°C/W

SOLDERED EXPOSED PAD (PIN 7)

INTERNALLY CONNECTED TO GND

(PCB CONNECTION OPTIONAL)

TOP VIEW

+ INA

GND

+INB

OUTA

OUTB

DCB6 PACKAGE

6-LEAD (2mm × 3mm) PLASTIC DFN

TJMAX = 125°C, θJA = 64°C/W

SOLDERED EXPOSED PAD (PIN 7)

INTERNALLY CONNECTED TO GND

(PCB CONNECTION OPTIONAL)

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

Lead Free Finish

TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE

LT6700CS6-1#TRMPBF LT6700CS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 0°C to 70°C

LT6700HVCS6-1#TRMPBF LT6700HVCS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 0°C to 70°C

LT6700IS6-1#TRMPBF LT6700IS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 –40°C to 85°C

LT6700HVIS6-1#TRMPBF LT6700HVIS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 –40°C to 85°C

LT6700HS6-1#TRMPBF LT6700HS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 –40°C to 125°C

LT6700HVHS6-1#TRMPBF LT6700HVHS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 –40°C to 125°C

LT6700MPS6-1#TRMPBF LT6700MPS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 –55°C to 125°C

LT6700CS6-2#TRMPBF LT6700CS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 0°C to 70°C

LT6700HVCS6-2#TRMPBF LT6700HVCS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 0°C to 70°C

LT6700IS6-2#TRMPBF LT6700IS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 –40°C to 85°C

LT6700HVIS6-2#TRMPBF LT6700HVIS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 –40°C to 85°C

LT6700HS6-2#TRMPBF LT6700HS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 –40°C to 125°C

LT6700HVHS6-2#TRMPBF LT6700HVHS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 –40°C to 125°C

LT6700MPS6-2#TRMPBF LT6700MPS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 –55°C to 125°C

LT6700CS6-3#TRMPBF LT6700CS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 0°C to 70°C

LT6700HVCS6-3#TRMPBF LT6700HVCS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 0°C to 70°C

LT6700IS6-3#TRMPBF LT6700IS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 –40°C to 85°C

LT6700HVIS6-3#TRMPBF LT6700HVIS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 –40°C to 85°C

LT6700HS6-3#TRMPBF LT6700HS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 –40°C to 125°C

LT6700HVHS6-3#TRMPBF LT6700HVHS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 –40°C to 125°C

LT6700MPS6-3#TRMPBF LT6700MPS6-2 #TRPBF LTADM 6-Lead Plastic TSOT-23 –55°C to 125°C

LT6700CDCB-1#TRMPBF LT6700CDCB-1#TRPBF LBXW 6-Lead (2mm × 3mm) Plastic DFN 0°C to 70°C

LT6700IDCB-1#TRMPBF LT6700IDCB-1#TRPBF LBXW 6-Lead (2mm × 3mm) Plastic DFN –40°C to 85°C

LT6700HDCB-1#TRMPBF LT6700HDCB-1#TRPBF LBXW 6-Lead (2mm × 3mm) Plastic DFN –40°C to 125°C

LT6700MPDCB-1#TRMPBF LT6700MPDCB-1#TR LDVS 6-Lead (2mm × 3mm) Plastic DFN –55°C to 125°C

LT6700CDCB-2#TRMPBF LT6700CDCB-2#TRPBF LBXX 6-Lead (2mm × 3mm) Plastic DFN 0°C to 70°C

LT6700IDCB-2#TRMPBF LT6700IDCB-2#TRPBF LBXX 6-Lead (2mm × 3mm) Plastic DFN –40°C to 85°C

LT6700HDCB-2#TRMPBF LT6700HDCB-2#TRPBF LBXX 6-Lead (2mm × 3mm) Plastic DFN –40°C to 125°C

LT6700MPDCB-2#TRMPBF LT6700MPDCB-2#TR LDVT 6-Lead (2mm × 3mm) Plastic DFN –55°C to 125°C

LT6700CDCB-3#TRMPBF LT6700CDCB-3#TRPBF LBXY 6-Lead (2mm × 3mm) Plastic DFN 0°C to 70°C

LT6700IDCB-3#TRMPBF LT6700IDCB-3#TRPBF LBXY 6-Lead (2mm × 3mm) Plastic DFN –40°C to 85°C

LT6700HDCB-3#TRMPBF LT6700HDCB-3#TRPBF LBXY 6-Lead (2mm × 3mm) Plastic DFN –40°C to 125°C

LT6700MPDCB-3#TRMPBF LT6700MPDCB-3#TR LDVV 6-Lead (2mm × 3mm) Plastic DFN –55°C to 125°C

TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container.

Consult LTC Marketing for parts specified with wider operating temperature ranges.

Consult LTC Marketing for information on lead based finish parts.

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/

ORDER INFORMATION

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VTH(R) Rising Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

394

395

393

392

400

406

405

407

408

VTH(F) Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

386

387

385

384

393.5

401

400

402

403

HYS HYS = VTH(R) – VTH(F) VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing 3.5 6.5 9.5 mV

IBInput Bias Current VS = 1.4V, 18V, VIN = VS

VS = 1.4V, VIN = 18V

VS = 1.4V, 18V, VIN = 0.1V

±0.01

±4

±10

VOL Output Low Voltage 10mV Input Overdrive

VS = 1.4V, IOUT = 0.5mA

VS = 1.6V, IOUT = 3mA

VS = 5V, IOUT = 5mA

200

IOFF Output Leakage Current VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive

VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive

0.01

0.8

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

trOutput Rise Time VS = 5V, 10mV Input Overdrive, RL = 10k

VO = (0.1 to 0.9) • VS

2.2 µs

tfOutput Fall Time VS = 5V, 10mV Input Overdrive, RL = 10k

VO = (0.1 to 0.9) • VS

0.22 µs

ISSupply Current No Load Current

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

5.7

6.5

6.9

7.1

10.0

11.0

12.5

13.0

µA

ELECTRICAL CHARACTERISTICS

TA = 25°C, (LT6700-1/LT6700-2/LT6700-3) unless otherwise specified.

The l denotes the speciﬁcations which apply over the temperature range of 0°C ≤ TA ≤ 70°C, (LT6700C-1/LT6700C-2/LT6700C-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 = 1.4V

VS = 5V

VS = 12V

VS = 18V

391.0

392.5

390.0

389.0

409.0

407.5

410.0

411.0

VTH(F) Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

383.5

384.5

382.5

381.5

403.5

402.5

404.5

405.5

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

ELECTRICAL CHARACTERISTICS

The l denotes the speciﬁcations which apply over the temperature range of 0°C ≤ TA ≤ 70°C, (LT6700C-1/LT6700C-2/LT6700C-3) unless

otherwise speciﬁed (Notes 4, 5).

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

HYS HYS = VTH(R) – VTH(F) VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing l3 11 mV

IBInput Bias Current VS = 1.4V, 18V, VIN = VS

VS = 1.4V, VIN = 18V

VS = 1.4V, 18V, VIN = 0.1V

±15

VOL Output Low Voltage 10mV Input Overdrive

VS = 1.4V, IOUT = 0.5mA

VS = 1.6V, IOUT = 3mA

VS = 5V, IOUT = 5mA

250

IOFF Output Leakage Current VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive

VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive

µA

ISSupply Current No Load Current

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

13.0

14.0

15.5

16.0

µA

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VTH(R) Rising Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

390

392

389

388

410

408

411

412

VTH(F) Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

382.5

383.5

381.5

380.5

404.5

403.5

405.5

406.5

HYS HYS = VTH(R) – VTH(F) VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing l2 11.5 mV

IBInput Bias Current VS = 1.4V, 18V, VIN = VS

VS = 1.4V, VIN = 18V

VS = 1.4V, 18V, VIN = 0.1V

±15

VOL Output Low Voltage 10mV Input Overdrive

VS = 1.4V, IOUT = 0.1mA

VS = 1.6V, IOUT = 3mA

VS = 5V, IOUT = 5mA

250

IOFF Output Leakage Current VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive

VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive

µA

ISSupply Current No Load Current

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

14.0

15.0

16.5

17.0

µA

The l denotes the speciﬁcations which apply over the temperature range of –40°C ≤ TA ≤ 85°C, (LT6700I-1/LT6700I-2/LT6700I-3)

unless otherwise speciﬁed (Notes 4, 5).

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

LT6700H

TYP

MAX

UNITS

VTH(R) Rising Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

390

392

389

388

411

410

412

413

VTH(F) Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

381.5

382.5

380.5

379.5

405.5

404.5

406.5

407.5

HYS HYS = VTH(R) – VTH(F) VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing l2 13.5 mV

IBInput Bias Current VS = 1.4V, 18V, VIN = VS

VS = 1.4V, VIN = 18V

VS = 1.4V, 18V, VIN = 100mV

±45

±50

VOL Output Low Voltage 10mV Input Overdrive

VS = 1.4V, IOUT = 0.1mA

VS = 1.6V, IOUT = 3mA

VS = 5V, IOUT = 5mA

250

IOFF Output Leakage Current VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive

VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive

µA

ISSupply Current No Load Current

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

16.0

17.0

18.5

19.0

µA

The l denotes the speciﬁcations which apply over the temperature range of –40°C ≤ TA ≤ 125°C, (LT6700H-1/LT6700H-2/LT6700H-3)

unless otherwise speciﬁed (Notes 4, 5).

SYMBOL

PARAMETER

CONDITIONS

MIN

LT6700H

TYP

MAX

UNITS

VTH(R) Rising Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

390

392

389

388

411

410

412

413

VTH(F) Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

381.5

382.5

380.5

379.5

405.5

404.5

406.5

407.5

HYS HYS = VTH(R) – VTH(F) VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing l2 13.5 mV

IBInput Bias Current VS = 1.4V, 18V, VIN = VS

VS = 1.4V, VIN = 18V

VS = 1.4V, 18V, VIN = 100mV

±45

±50

VOL Output Low Voltage 10mV Input Overdrive

VS = 1.4V, IOUT = 0.1mA

VS = 1.6V, IOUT = 3mA

VS = 5V, IOUT = 5mA

250

The l denotes the speciﬁcations which apply over the temperature range of –55°C ≤ TA ≤ 125°C, (LT6700MP-1/LT6700MP-2/LT6700MP-3)

unless otherwise speciﬁed (Notes 4, 5).

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VTH(R) Rising Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

394

395

393

392

400

406

405

407

408

VTH(F) Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

386

387

385

384

393.5

401

400

402

403

HYS HYS = VTH(R) – VTH(F) VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing 3.5 6.5 9.5 mV

IBInput Bias Current VS = 1.4V, 18V, VIN = VS

VS = 1.4V, VIN = 18V, 36V

VS = 1.4V, 18V, VIN = 0.1V

±0.01

±4

±10

VOL Output Low Voltage 10mV Input Overdrive

VS = 1.4V, IOUT = 0.5mA

VS = 1.6V, IOUT = 3mA

VS = 5V, IOUT = 5mA

200

IOFF Output Leakage Current VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive

VS = 18V, VOUT = 18V, (36V, RL = 100k), VIN = 40mV Overdrive

0.01

0.8

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

trOutput Rise Time VS = 5V, 10mV Input Overdrive, RL = 10k

VO = (0.1 to 0.9) • VS

2.2 µs

tfOutput Fall Time VS = 5V, 10mV Input Overdrive, RL = 10k

VO = (0.1 to 0.9) • VS

0.22 µs

ISSupply Current No Load Current

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

5.7

6.5

6.9

7.1

10.0

11.0

12.5

13.0

µA

TA = 25°C, (LT6700HV-1/LT6700HV-2/LT6700HV-3) unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN

LT6700H

TYP

MAX

UNITS

IOFF Output Leakage Current VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive

VS = 18V, VOUT = 18V, VIN = 40mV Overdrive

µA

ISSupply Current No Load Current

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

16.0

17.0

18.5

19.0

µA

The l denotes the speciﬁcations which apply over the temperature range of –55°C ≤ TA ≤ 125°C, (LT6700MP-1/LT6700MP-2/LT6700MP-3)

unless otherwise speciﬁed (Notes 4, 5).

ELECTRICAL CHARACTERISTICS

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

ELECTRICAL CHARACTERISTICS

The l denotes the speciﬁcations which apply over the temperature range of 0°C ≤ TA ≤ 70°C, (LT6700HVC-1/LT6700HVC-2/LT6700HVC-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 = 1.4V

VS = 5V

VS = 12V

VS = 18V

391.0

392.5

390.0

389.0

409.0

407.5

410.0

411.0

VTH(F) Falling Input Threshold Voltage

(Note 6)

RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

383.5

384.5

382.5

381.5

403.5

402.5

404.5

405.5

HYS HYS = VTH(R) – VTH(F) VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing l3 11 mV

IBInput Bias Current VS = 1.4V, 18V, VIN = VS

VS = 1.4V, VIN = 18V, 36V

VS = 1.4V, 18V, VIN = 0.1V

±15

VOL Output Low Voltage 10mV Input Overdrive

VS = 1.4V, IOUT = 0.5mA

VS = 1.6V, IOUT = 3mA

VS = 5V, IOUT = 5mA

250

IOFF Output Leakage Current VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive

VS = 18V, VOUT = 18V, (36V, RL = 100k), VIN = 40mV Overdrive

µA

ISSupply Current No Load Current

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

13.0

14.0

15.5

16.0

µA

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VTH(R) Rising Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

390

392

389

388

410

408

411

412

VTH(F) Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

382.5

383.5

381.5

380.5

404.5

403.5

405.5

406.5

HYS HYS = VTH(R) – VTH(F) VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing l2 11.5 mV

IBInput Bias Current VS = 1.4V, 18V, VIN = VS

VS = 1.4V, VIN = 18V, 36V

VS = 1.4V, 18V, VIN = 0.1V

±15

VOL Output Low Voltage 10mV Input Overdrive

VS = 1.4V, IOUT = 0.1mA

VS = 1.6V, IOUT = 3mA

VS = 5V, IOUT = 5mA

250

IOFF Output Leakage Current VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive

VS = 18V, VOUT = 18V, (36V, RL = 100k), VIN = 40mV Overdrive

µA

The l denotes the speciﬁcations which apply over the temperature range of –40°C ≤ TA ≤ 85°C, (LT6700HVI-1/LT6700HVI-2/LT6700HVI-3)

unless otherwise speciﬁed (Notes 4, 5).

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

LT6700H

TYP

MAX

UNITS

VTH(R) Rising Input Threshold Voltage

(Note 6)

RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

390

392

389

388

411

410

412

413

VTH(F) Falling Input Threshold Voltage

(Note 6)

RL = 100k, VO = 2V Swing

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

381.5

382.5

380.5

379.5

405.5

404.5

406.5

407.5

HYS HYS = VTH(R) – VTH(F) VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing l2 13.5 mV

IBInput Bias Current VS = 1.4V, 18V, VIN = VS

VS = 1.4V, VIN = 18V, 36V

VS = 1.4V, 18V, VIN = 100mV

±45

±50

VOL Output Low Voltage 10mV Input Overdrive

VS = 1.4V, IOUT = 0.1mA

VS = 1.6V, IOUT = 3mA

VS = 5V, IOUT = 5mA

250

IOFF Output Leakage Current VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive

VS = 18V, VOUT = 18V, (36V, RL = 100k), VIN = 40mV Overdrive

µA

ISSupply Current No Load Current

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

16.0

17.0

18.5

19.0

µA

The l denotes the speciﬁcations which apply over the temperature range of –40°C ≤ TA ≤ 125°C, (LT6700HVH-1/LT6700HVH-2/

LT6700HVH-3) unless otherwise speciﬁed (Notes 4, 5).

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

ISSupply Current No Load Current

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

14.0

15.0

16.5

17.0

µA

The l denotes the speciﬁcations which apply over the temperature range of –40°C ≤ TA ≤ 85°C, (LT6700HVI-1/LT6700HVI-2/LT6700HVI-3)

unless otherwise speciﬁed (Notes 4, 5).

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. If the input

voltage exceeds –0.3V below ground, the input current should be limited

to less than 10mA.

Note 4: The LT6700C-1/-2/-3/LT6700HVC-1/-2/-3, and

LT6700I-1/-2/-3/LT6700HVI-1/-2/-3 are guaranteed functional over the

operating temperature range of –40°C to 85°C. The LT6700H-1/-2/-3/

LT6700HVH-1/-2/-3 is guaranteed functional over the operating

temperature range of –40°C to 125°C. The LT6700MP-1/-2/-3 is

guaranteed functional over the operating temperature range of –55°C to

125°C.

Note 5: The LT6700C-1/-2/-3/LT6700HVC-1/-2/-3 is guaranteed to

meet the speciﬁed performance from 0°C to 70°C. The LT6700C-1/-2/-

3/LT6700HVC-1/-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 LT6700I-1/-2/-3/LT6700HVI-1/-2/-3

is guaranteed to meet speciﬁed performance from –40°C to 85°C. The

LT6700H-1/-2/-3/LT6700HVH-1/-2/-3 is guaranteed to meet speciﬁed

performance from –40°C to 125°C.The LT6700MP-1/-2/-3 is guaranteed to

meet speciﬁed performance from –55°C to 125°C.

Note 6: VTH deﬁnes the threshold voltage of the comparators and

combines the effect of offset and reference accuracy.

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

OUTA: Open-Collector Output of Comparator Section A.

This pin provides drive for up to 40mA of load current. Off-

state voltage may be as high as 18V (36V for LT6700HV)

above GND, regardless of VS used.

GND: Ground. This pin is also the low side return of the

internal 400mV reference.

INA: External Input for Comparator Section A. The volt-

age on this pin can range from –0.3V to 18V (36V for

LT6700HV) with respect to GND regardless of VS used.

The input is noninverting for the LT6700-1/LT6700HV-1

and LT6700-3/LT6700HV-3, and inverting for the LT6700-2/

LT6700HV-2. The other section A comparator input is

internally connected to the 400mV reference.

INB: External Input for Comparator Section B. The volt-

age on this pin can range from –0.3V to 18V (36V for

LT6700HV) with respect to GND regardless of VS used.

The input is noninverting for the LT6700-3/LT6700HV-3,

and inverting for the LT6700-1/LT6700HV-1 and LT6700-2/

LT6700HV-2. The other section B comparator input is

internally connected to the 400mV reference.

VS: Comparator Core Supply Voltage. The parts are char-

acterized for operation with 1.4V ≤ VS ≤ 18V with respect

to GND.

OUTB: Open-Collector Output of Comparator Section B.

This pin provides drive for up to 40mA of load current. Off-

state voltage may be as high as 18V (36V for LT6700HV)

above GND, regardless of VS used.

–

COMP B

COMP A

400mV

REFERENCE

OUTB

–INB

+INA

OUTA

GND

LT6700-1

LT6700HV-1

6700123 PF01

PIN FUNCTIONS

–

COMP B

COMP A

400mV

REFERENCE

OUTB

–INB

–INA

OUTA

GND

LT6700-2

LT6700HV-2

6700123 PF02

–

COMP B

COMP A

400mV

REFERENCE

OUTB

+INB

+INA

OUTA

GND

LT6700-3

LT6700HV-3

6700123 PF03

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

TYPICAL PERFORMANCE CHARACTERISTICS

Distribution of Rising Input

Threshold Voltage

Distribution of Falling Input

Threshold Voltage

Distribution of Hysteresis

Rising Input Threshold Voltage

vs Temperature

Rising Input Threshold Voltage

vs Temperature

Rising Input Threshold Voltage

vs Supply Voltage

Hysteresis vs Temperature

Hysteresis vs Supply Voltage

RISING INPUT THRESHOLD VOLTAGE (mV)

394 396 398 400 402 404 406

PERCENT OF UNITS (%)

6700123 G01

VS = 5V

TA = 25°C

FALLING INPUT THRESHOLD VOLTAGE (mV)

388 390 392 394 396 398 400

PERCENT OF UNITS (%)

6700123 G02

VS = 5V

TA = 25°C

HYSTERESIS (mV)

4 4.8 5.6 6.4 7.2 8 8.8

PERCENT OF UNITS (%)

6700123 G03

20 VS = 5V

TA = 25°C

TEMPERATURE (°C)

–60 –40

RISING INPUT THRESHOLD VOLTAGE (mV)

400

401

402

100 120

6700123 G04

399

398

–20 0 20 40 60 80

397

404

403

396

FOUR TYPICAL PARTS

VS = 5V

TEMPERATURE (°C)

–60 –40

RISING INPUT THRESHOLD VOLTAGE (mV)

401.0

401.5

402.0

100 120

6700123 G05

400.5

400.0

–20 0 20 40 60 80

399.5

403.0

402.5

399.0

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

SUPPLY VOLTAGE (V)

RISING INPUT THRESHOLD VOLTAGE (mV)

401.0

401.5

402.0

6700123 G06

400.5

400.0

2 4 1614 18

68 10 12

399.5

403.0

402.5

399.0

TA = 25°C

TA = 85°C

TA = 125°C

TA = –55°C

TEMPERATURE (°C)

–60 –40

HYSTERESIS (mV)

100 120

6700123 G07

–20 0 20 40 60 80

FOUR TYPICAL PARTS

VS = 5V

TEMPERATURE (°C)

–60 –40

HYSTERESIS (mV)

100 120

6700123 G08

–20 0 20 40 60 80

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

SUPPLY VOLTAGE (V)

HYSTERESIS (mV)

6700123 G09

2 4 1614 18

68 10 12

TA = 25°C

TA = 85°C

TA = 125°C

TA = –55°C

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

TYPICAL PERFORMANCE CHARACTERISTICS

Minimum Supply Voltage

Quiescent Supply Current

vs Supply Voltage

Start-Up Supply Current

Supply Current

vs Output Sink Current

Supply Current

vs Output Sink Current

Supply Current

vs Output Sink Current

Below Ground Input Bias Current

Low Level Input Bias Current

High Level Input Bias Current

SUPPLY VOLTAGE (V)

–5

THRESHOLD SHIFT (mV)

–3

–1

–4

–2

1.3 1.7

6700123 G10

1.91.10.9 1.5

TA = 25°C

TA = 85°C

TA = 125°C

TA = –55°C

SUPPLY VOLTAGE (V)

1.4 3.4

SUPPLY CURRENT (µA)

15.413.4 17.4

6700123 G11

5.4 7.4 9.4 11.4

TA = 25°C

TA = 85°C

TA = 125°C

TA = –55°C

NO LOAD CURRENT

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

0.8

6700123 G12

00.2 0.4 0.6 1.0 1.2 1.4

TA = 25°C

TA = 85°C

TA = 125°C

TA = –55°C

OUTPUT SINK CURRENT (mA)

SUPPLY CURRENT (µA)

100

0.001 0.1 1 10

6700123 G13

0.01

1000

100

TA = –40°C

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

OUTPUT SINK CURRENT (mA)

SUPPLY CURRENT (µA)

100

0.001 0.1 1 10

6700123 G14

0.01

1000

100

TA = 25°C

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

OUTPUT SINK CURRENT (mA)

SUPPLY CURRENT (µA)

100

0.001 0.1 1 10

6700123 G15

0.01

1000

100

TA = 85°C

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

INPUT VOLTAGE (V)

INPUT BIAS CURRENT (nA)

1000

10000

–0.3 –0.1 0

6700123 G16

–0.2

100

TA = 25°C

TA = 85°C

TA = 125°C

TA = –55°C

VS = 18V

–0.3V < VIB < 0V

CURRENT IS GOING OUT OF THE DEVICE

INPUT VOLTAGE (V)

–7

INPUT BIAS CURRENT (nA)

–6

–4

–3

–2

0.2 0.4 0.5

6700123 G17

–5

–1

0.1 0.3 0.6 0.7 10.90.8

TA = 25°C

TA = 85°C

TA = 125°C

TA = –55°C

VS = 18V

0V < VIB < 1V

CURRENT IS POSITIVE GOING

INTO THE DEVICE

INPUT VOLTAGE (V)

0.01

INPUT BIAS CURRENT (nA)

1 3 5 7 9 11 13 15 17

6700123 G18

0.001

0.1

TA = 25°C

TA = 85°C

TA = 125°C

VS = 18V

VIB > 1V

CURRENT IS GOING INTO THE DEVICE

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

TYPICAL PERFORMANCE CHARACTERISTICS

Output Saturation Voltage

vs Output Sink Current

Output Saturation Voltage

vs Output Sink Current

Output Saturation Voltage

vs Output Sink Current

Output Short-Circuit Current

Output Leakage Current

Propagation Delay

vs Input Overdrive

Rise and Fall Times

vs Output Pull-Up Resistor

Noninverting and Inverting

Comparator Propagation Delay

OUTPUT SINK CURRENT (mA)

OUTPUT SATURATION VOLTAGE (mV)

100

0.001 0.1 1 10

6700123 G19

0.01

1000

100

TA = –40°C

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

OUTPUT SINK CURRENT (mA)

OUTPUT SATURATION VOLTAGE (mV)

100

0.001 0.1 1 10

6700123 G20

0.01

1000

100

TA = 25°C

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

OUTPUT SINK CURRENT (mA)

OUTPUT SATURATION VOLTAGE (mV)

100

0.001 0.1 1 10

6700123 G21

0.01

1000

100

TA = 85°C

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

OUTPUT VOLTAGE (V)

SHORT-CIRCUIT CURRENT (mA)

6700123 G22

2 4 1614 18

68 10 12

TA = 25°C

TA = 85°C

TA = 125°C

TA = –55°C

VS = 5V

OUTPUT VOLTAGE (V)

SHORT-CIRCUIT CURRENT (mA)

6700123 G23

2 4 1614 18

68 10 12

TA = 25°C

VS = 1.4V

VS = 5V

VS = 12V

VS = 18V

OUTPUT VOLTAGE (V)

0.01

OUTPUT LEAKAGE CURRENT (nA)

0.1

0 8 10 12 14 16

0.001

246 18

6700123 G24

TA = 25°C

TA = 85°C

TA = 125°C

TA = –55°C

VS = 5V

INPUT OVERDRIVE (mV)

PROPAGATION DELAY (µs)

6700123 G25

020 40 60 100

LH NONINV

HL NONINV

LH INV

HL INV

TA = 25°C

OUTPUT PULL-UP RESISTOR (kΩ)

0.1

0.01

RISE AND FALL TIME (µs)

100

1 10 100 1000

6700123 G26

0.1

VS = 5V

CL = 20pF

TA = 25°C

RISE

FALL

6700123 G27

VO(NINV)

5V/DIV

VO(INV)

5V/DIV

VIN

10mV/DIV

20µs/DIVVS = 15V

TA = 25°C

RLOAD = 10k CONNNECTED TO VS

VIN(OVERDRIVE) = 10mV OVER THE INPUT

VOLTAGE THRESHOLDS

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

APPLICATIONS INFORMATION

The LT6700-1/LT6700-2/LT6700-3/LT6700HV-1/

LT6700HV-2/LT6700HV-3 devices are a family of dual

micropower comparators with a built-in 400mV refer-

ence. 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. The comparator’s open-collector outputs can

sink up to 40mA typical.

Internal Reference

Each of the comparator sections has one input available

externally, with the three versions of the part differing by

the polarity of those available inputs (i.e., inverting or

noninverting). The other comparator inputs are connected

internally to the 400mV reference. The rising input threshold

voltage of the comparators 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) hysteresis to

simplify designs, ensure 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

circuitry can be employed with noninverting comparator

inputs 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 Inputs

A comparator input can swing from ground to 18V (36V

for LT6700HV), regardless of the supply voltage used. The

typical input current for inputs well above threshold (i.e.,

>800mV) is a few pA leaking into an 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 parasitic ESD input pro-

tection diode. Inputs driven further negative than 100mV

below ground will not cause comparator malfunction or

damage (provided the current is limited to 10mA), but

the accuracy of the reference cannot be guaranteed, in

which case the output state of the alternate comparator

may be affected.

Comparator Outputs

The comparator outputs are open collector and capable

of sinking 40mA typical. Load currents are directed out

the GND pin of the part. The output off-state voltage may

range between –0.3V and 18V (36V for LT6700HV) with

respect to ground, regardless of the supply voltage used.

When the output high state bias voltage is above 18V, a

100k minimum pull-up resistor is required and total load

capacitor must be less than 100nF. If the output high state

is above 18V, caution must be taken to prevent a short

from the output directly to the bias voltage, even if the

output is in the off state. As with any open-collector device,

the outputs may be tied together to implement wire-AND

logic functions.

Power Supplies

The comparator family core 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 capaci-

tor is recommended. The voltage reference built into the

LT6700 can be susceptible to high noise on the supply

line, particularly noise that is less than 50kHz and larger

than 20mVP-P. In order to reduce the probability of a false

comparator output in the presence of high supply noise,

an RC filter should be used to reduce the noise. This filter

can be created simply by adding a series R between the

system supply and the LT6700 VS pin, using the decoupling

capacitor to create a lowpass response. It is recommended

that the filter have a time constant:

tRC > VN/100

Where VN is the peak-peak supply noise in millivolts and

tRC is milliseconds.

This filter will also increase the start-up time of the LT6700

by reducing the rate at which the supply can change. When

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

APPLICATIONS INFORMATION

using a supply filter, the start-up time of the LT6700 will

increase to:

tSTART = (0.17ms + 0.25 • tRC) • ΔVS

Where tSTART and tRC are in milliseconds and ΔVS is the

change in supply in volts. The low supply current of the

LT6700 should not cause significant voltage drop due to

a 2k maximum series R.

Flexible Window Comparator

Using the LT6700-1/LT6700HV-1 as shown in the circuits

of Figure 1, the wire-AND configuration permits high

accuracy window functions to be implemented with a

simple 3-resistor voltage divider network. The section A

comparator provides the VL trip-point and the section B

comparator provides the VH trip-point, with the built-in

hysteresis providing about 1.7% recovery level at each

trip point to prevent output chatter.

For designs that are to be optimized to detect

departure

from a window limit, the nominal resistor divider values

are selected as follows (refer to the resistor designators

shown on the first circuit of Figure 1):

R1 ≤ 400k (this sets the divider current >> IB of inputs)

R2 = R1 • (0.98 • VH/VL – 1)

R3 = R1 • (2.5 • VH – 0.98 • VH/VL)

To create window functions optimized for detecting

entry

into a window (i.e., where the output is to indicate a “com-

ing into spec” condition, as with the examples in Figure 1),

Figure 1. Simple Window Comparator

the nominal resistor values are selected as follows:

R1 ≤ 400k (this sets the divider current >> IB of inputs)

R2 = R1 • (1.02 • VH/VL – 1)

R3 = R1 • (2.54 • VH – 1.02 • VH/VL)

The worst-case variance of the trip-points is related to

the specified threshold limits of the LT6700/LT6700HV

device and the basic tolerance of divider resistors used.

For resistor tolerance RTOL (e.g. 0.01 for 1%), the worst-

case trip-point voltage (either VH or VL) deviations can be

predicted as follows (italicized values are taken from the

data sheet, expressed in volts):

Max dev VTRIP↑ = ±VTRIPnom • {2 • RTOL • [(VTRIPnom – 0.4)

/ VTRIPnom] + 1.25 • (

VTH(R)max

–

VTH(R)min

)}

Max dev VTRIP↓ = ±VTRIPnom • {2 • R TOL • [(VTRIPnom – 0.39)

/ VTRIPnom] + 1.27 • (

VTH(F)max

–

VTH(F)min

)}

Generating an External Reference Signal

In some applications, it would be advantageous to have

access to a signal that is directly related to the internal

400mV reference, even though the reference itself is not

available externally. This can be accomplished to a reason-

able degree by using an inverting comparator section as

a “bang-bang” servo, establishing a nominal voltage, on

an integration capacitor, that is scaled to the reference.

This method is used in Figure 2, where the reference level

has been doubled to drive a resistor bridge. The section

B output cycles on and off to swing the section B input

between its hysteresis trip points as the load capacitor

LT6700-1

GND

301k

6.04k

33k

+INA

–INB OUTB

OUTA

VOUT

VLVH

3.3V

3.3V Supply Monitor 5V Supply Monitor

40.2k

VOUT

HIGH = (3.1V < VS < 3.5V)

HYSTERESIS ZONES

APPROXIMATELY

2% OF TRIP VOLTAGE

LT6700-1

GND

487k

6.04k

33k

+INA

–INB OUTB

OUTA

40.2k

VOUT

HIGH = (4.7V < VS < 5.3V)

6700123 F01

0.1µF 0.1µF

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

APPLICATIONS INFORMATION

Figure 3. Isolated PWM or ∆∑ Converter

LT6700-1

10k

GND

+INA

–INB OUTB

OUTA

100k*100k*

0.22µF††

–

412k*

10k**

470Ω

Lithium

COIN CELL

10k 10k

750Ω

10k

750**

†

3V/5V

ΔΣ

SAMPLE

MOC-207

MOC-207**

PWM OUT

(OR ΔΣ SENSE)

0.1µF

3V NOM (IS < 3mA)

5 • VREF = 2V

6700123 F03

22µF

1% METAL FILM

DELETE FOR PWM MODE

CONNECT FOR PWM MODE

OPTIMIZED FOR 2kHz ΔΣ SAMPLING, fPWM(MAX) ≈ 0.6kHz

†

††

309k*

NC7S14

309k*

VIN

0V TO 2V

Figure 2. Micropower Thermostat/Temperature Alarm

LT6700-1

10k

GND

+INA

–INB OUTB

OUTA

499k

RTH T

RTH = 1M (e.g., YSI 44015, 1.00MΩ AT 25°C)

RSET = RTH AT TSET

*RESISTANCE MAY REQUIRE OPTIMIZATION FOR OPERATION

OVER INTENDED RTH AND VSUPPLY RANGES

HYSTERESIS ZONE ≈0.4°C

RSET

2 • VREF

499k 220k 220k*

3.3µF3.3µF

1.4V TO 18V

(IS ≈ 10µA)

0.1µF

T < TSET

6700123 F02

charges and discharges in a shallow, controlled fashion.

The multiplied reference signal also contains ripple that is

the hysteresis multiplied by the same factor, so additional

filtering is performed at the sense node of the bridge to

prevent comparator chatter in the section A comparator,

which is performing the actual conditional decision for

the circuit.

Instrumentation Grade Pulse Width Modulator (PWM)

Comparators with hysteresis are frequently employed

to make simple oscillator structures, and the LT6700/

LT6700HV lends itself nicely to forming a charge-balancing

PWM function. The circuit shown in Figure 3 forms a PWM

that is intended to transmit an isolated representation of a

voltage difference, rather like an isolated instrumentation

amplifier. The section B comparator is used to generate a

2V reference supply level for the CMOS NOT gate (inverter),

which serves as the precision switch element for the charge

balancer. The heart of the charge balancer is the section A

comparator, which is detecting slight charge or discharge

states on the 0.22µF “integration” capacitor as it remains

balanced at ≈400mV by feedback through the NOT gate.

The input sense voltage, VIN, is converted to an imbal-

ance current that the NOT gate duty cycle is continually

correcting for, thus the digital waveform at the section A

comparator output is a PWM representation of VIN with

respect to the 2V “full scale.” In this particular circuit, the

PWM information drives the LED of an opto-coupler, allow-

ing the VIN information to be coupled across a dielectric

barrier. As an additional option to the circuit, the feedback

loop can be broken and a second opto-coupler employed to

provide the charge balance management. This configura-

tion allows for clocking the comparator output (externally

to this circuit) and providing synchronous feedback such

that a simple Δ∑ voltage-to-frequency conversion can be

formed if desired. Approximately 11-bit accuracy and noise

performance was observed in a one second integration

period for duty factors from 1% to 99%.

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

3.00 ±0.10

(2 SIDES)

2.00 ±0.10

(2 SIDES)

NOTE:

1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (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

0.40 ± 0.10

BOTTOM VIEW—EXPOSED PAD

1.65 ± 0.10

(2 SIDES)

0.75 ±0.05

R = 0.115

TYP

R = 0.05

TYP

1.35 ±0.10

(2 SIDES)

PIN 1 BAR

TOP MARK

(SEE NOTE 6)

0.200 REF

0.00 – 0.05

(DCB6) DFN 0405

0.25 ± 0.05

0.50 BSC

PIN 1 NOTCH

R0.20 OR 0.25

× 45° CHAMFER

0.25 ± 0.05

1.35 ±0.05

(2 SIDES)

RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS

1.65 ±0.05

(2 SIDES)

2.15 ±0.05

0.70 ±0.05

3.55 ±0.05

PACKAGE

OUTLINE

0.50 BSC

PACKAGE INFORMATION

DCB Package

6-Lead Plastic DFN (2mm × 3mm)

(Reference LTC DWG # 05-08-1715 Rev A)

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

1.50 – 1.75

(NOTE 4)

2.80 BSC

0.30 – 0.45

6 PLCS (NOTE 3)

DATUM ‘A’

0.09 – 0.20

(NOTE 3) S6 TSOT-23 0302 REV B

2.90 BSC

(NOTE 4)

0.95 BSC

1.90 BSC

0.80 – 0.90

1.00 MAX 0.01 – 0.10

0.20 BSC

0.30 – 0.50 REF

PIN ONE ID

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

3.85 MAX

0.62

MAX

0.95

REF

RECOMMENDED SOLDER PAD LAYOUT

PER IPC CALCULATOR

1.4 MIN

2.62 REF

1.22 REF

PACKAGE INFORMATION

S6 Package

6-Lead Plastic TSOT-23

(Reference LTC DWG # 05-08-1636)

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

REVISION HISTORY

REV DATE DESCRIPTION PAGE NUMBER

G 5/10 Power Supplies section updated

Modified part number header for clarity

1 to 20

H 6/13 Web hyperlinks added

Addition of MP grade in SOT23 package

1-20

2, 3

(Revision history begins at Rev G)

LT6700/LT6700HV

6700123fh

For more information www.linear.com/LT6700

 LINEAR TECHNOLOGY CORPORATION 2003

LT 0613 REV H • PRINTED IN USA

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LT6700

RELATED PARTS

TYPICAL APPLICATIONS

PowerPath™ Controller

48V Status Monitor

PART NUMBER DESCRIPTION COMMENTS

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LTC1441/LTC1442 Micropower Dual Comparator with 1% Reference 1.182 ±1% Reference, ±10mV (Max) Input Offset

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1.74M

7.87k

VIN 27k 33k

MOC-207

6700123 TA03

VOUT

LOW = (39V < VIN < 70V)

3V/5V

1 6

2 5

33k

VIN

HYSTERESIS ZONES

APPROXIMATELY

2% OF TRIP VOLTAGE

VOUT

LED OFF

LED ON

VLVH

10k

5.1V

CMPZ5231B

22V

CMPZ5251B

0.1µF

–

LT6700-1

GND

+INA

–INB OUTB

OUTA

LT6700-3

GND

+INA

+INB OUTB

OUTA

249k

150k

R1 = 400k/(VBATT AT LOW –0.4)

R2 = 400k/(VBATT AT MAX –0.4)

HYSTERESIS ZONES APPROXIMATELY 2% OF TRIP VOLTAGE

PowerPath IS A TRADEMARK OF LINEAR TECHNOLOGY CORPORATION

1M 1M

Si2301DS

B0520LW

100k

VSUPPLY

1.6V MIN

3V NOM

VWART > 3.1V

VBATT > 2V

1µF

6700123 TA04

10k

“WART” INPUT

3.3V NOM

ALKALINE

AA CELLS