Datasheet

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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

Internal 400mV Reference

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

Inputs and Outputs Operate to 36V

Wide Supply Range: 1.4V to 18V

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

Low Quiescent Current: 6.5µA Typ at 5V

Internal Hysteresis: 6.5mV Typ

Low Input Bias Current: ±10nA Max

Over-The-Top

Input also Includes Ground

Open-Collector Outputs Allow Level Translation

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

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

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

and 2mm × 3mm DFN Packages

Battery-Powered System Monitoring

Threshold Detectors

Window Comparators

Relay Driving

Industrial Control Systems

Handheld Instruments

Automotive Monitor and Controls

Comparator Thresholds

vs Temperature

–

COMP B

COMP A

ALKALINE

AA CELLS

= 400mV

REFERENCE

0.1µF

LT6700-3

63.4k

261k

BATT

> 1.6V

BATT

> 2V

MONITOR CONSUMES ~10µA

HYSTERESIS IS APPROXIMATELY

2% OF TRIP VOLTAGE

6700123 TA01

BATT

1.4V (MIN)

3V (NOM)

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

= 5V

#1A

#1B

#2A

#2B

RISING INPUT

FALLING INPUT

Summary of content (20 pages)

PAGE 1
LT6700/LT6700HV Micropower, Low Voltage, Dual Comparator with 400mV Reference DESCRIPTION FEATURES n n n n n n n n n n n n Internal 400mV Reference Total Threshold Error: ±1.25% Max at 25°C Inputs and Outputs Operate to 36V Wide Supply Range: 1.4V to 18V Specified for –55°C to 125°C Temperature Range Low Quiescent Current: 6.5µA Typ at 5V Internal Hysteresis: 6.
PAGE 2
LT6700/LT6700HV ABSOLUTE MAXIMUM RATINGS (Note 1) 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)...........................................
PAGE 3
LT6700/LT6700HV ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION LT6700CS6-1#TRMPBF LT6700CS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700HVCS6-1#TRMPBF LT6700HVCS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700IS6-1#TRMPBF LT6700IS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700HVIS6-1#TRMPBF LT6700HVIS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700HS6-1#TRMPBF LT6700HS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700HVHS6-1#TRMPBF LT6700HVHS6-1#TRPBF LTK7 6-Lead Pl
PAGE 4
LT6700/LT6700HV ELECTRICAL CHARACTERISTICS TA = 25°C, (LT6700-1/LT6700-2/LT6700-3) unless otherwise specified. 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 394 395 393 392 400 400 400 400 406 405 407 408 mV mV mV mV VTH(F) Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V 386 387 385 384 393.5 393.5 393.5 393.
PAGE 5
LT6700/LT6700HV 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 HYS HYS = VTH(R) – VTH(F) VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing l 11 mV IB Input Bias Current VS = 1.4V, 18V, VIN = VS VS = 1.4V, VIN = 18V VS = 1.4V, 18V, VIN = 0.
PAGE 6
LT6700/LT6700HV ELECTRICAL CHARACTERISTICS 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 VTH(R) Rising Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V l l l l VTH(F) Falling Input Threshold Voltage (Note 6) RL = 100k, VO = 2V Swing VS = 1.
PAGE 7
LT6700/LT6700HV ELECTRICAL CHARACTERISTICS 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). MIN LT6700H TYP SYMBOL PARAMETER CONDITIONS IOFF Output Leakage Current VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive VS = 18V, VOUT = 18V, VIN = 40mV Overdrive l l MAX 1 1 UNITS µA µA IS Supply Current No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V l l l l 16.0 17.0 18.
PAGE 8
LT6700/LT6700HV 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 l l l l 391.0 392.5 390.0 389.0 409.0 407.5 410.0 411.
PAGE 9
LT6700/LT6700HV ELECTRICAL CHARACTERISTICS 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). SYMBOL PARAMETER IS Supply Current CONDITIONS MIN No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V l l l l TYP MAX UNITS 14.0 15.0 16.5 17.
PAGE 10
LT6700/LT6700HV PIN FUNCTIONS LT6700-2 LT6700HV-2 LT6700-1 LT6700HV-1 –INB – VS VS VS COMP B –INB – LT6700-3 LT6700HV-3 COMP B +INB OUTB – OUTB + VS – 400mV REFERENCE COMP A + + VS 400mV REFERENCE COMP A OUTA +INA COMP B OUTB + 400mV REFERENCE + – COMP A OUTA OUTA –INA – +INA 6700123 PF01 + 6700123 PF03 6700123 PF02 GND GND GND OUTA: Open-Collector Output of Comparator Section A. This pin provides drive for up to 40mA of load current.
PAGE 11
LT6700/LT6700HV TYPICAL PERFORMANCE CHARACTERISTICS Distribution of Rising Input Threshold Voltage VS = 5V TA = 25°C 14 12 10 8 6 4 12 10 8 6 4 12 10 8 6 4 2 2 0 0 388 390 392 394 396 398 400 FALLING INPUT THRESHOLD VOLTAGE (mV) 0 394 396 398 400 402 404 406 RISING INPUT THRESHOLD VOLTAGE (mV) #1 402 401 400 #2 #3 399 398 397 #4 Rising Input Threshold Voltage vs Temperature 403.0 402.5 402.0 VS = 1.4V VS = 5V VS = 12V VS = 18V 401.5 401.0 400.5 400.0 399.
PAGE 12
LT6700/LT6700HV TYPICAL PERFORMANCE CHARACTERISTICS Quiescent Supply Current vs Supply Voltage Minimum Supply Voltage 1 10 –1 –2 –3 TA = 25°C TA = 85°C TA = 125°C TA = –55°C –5 0.9 1.1 1.3 1.7 1.5 SUPPLY VOLTAGE (V) 8 7 6 4 1.4 3.4 5.4 7.4 9.4 11.4 13.4 15.4 17.4 SUPPLY VOLTAGE (V) 0.01 0.1 1 10 OUTPUT SINK CURRENT (mA) 100 10 1 0.001 100 1000 TA = 25°C VS = 1.4V VS = 5V VS = 12V VS = 18V 0.01 0.
PAGE 13
LT6700/LT6700HV TYPICAL PERFORMANCE CHARACTERISTICS 1000 TA = –40°C VS = 1.4V VS = 5V VS = 12V VS = 18V 100 OUTPUT SATURATION VOLTAGE (mV) OUTPUT SATURATION VOLTAGE (mV) 1000 Output Saturation Voltage vs Output Sink Current 10 1 0.001 0.01 0.1 1 10 OUTPUT SINK CURRENT (mA) 1000 TA = 25°C VS = 1.4V VS = 5V VS = 12V VS = 18V 100 10 1 0.001 100 0.01 0.
PAGE 14
LT6700/LT6700HV 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 reference. Features include wide supply voltage range (1.4V to 18V), Over-The-Top input and output range, 2% accurate rising input threshold voltage and 6.5mV typical built-in hysteresis. The comparator’s open-collector outputs can sink up to 40mA typical.
PAGE 15
LT6700/LT6700HV 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.
PAGE 16
LT6700/LT6700HV APPLICATIONS INFORMATION 0.1µF 1.4V TO 18V (IS ≈ 10µA) 2 • VREF RSET 499k LT6700-1 3.3µF RTH –INB OUTB GND T 220k VS +INA OUTA 220k* T < TSET 10k 3.3µF 499k 6700123 F02 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 Figure 2. Micropower Thermostat/Temperature Alarm charges and discharges in a shallow, controlled fashion.
PAGE 17
LT6700/LT6700HV PACKAGE INFORMATION DCB Package 6-Lead Plastic DFN (2mm × 3mm) (Reference LTC DWG # 05-08-1715 Rev A) 0.70 ±0.05 3.55 ±0.05 1.65 ±0.05 (2 SIDES) 2.15 ±0.05 PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 1.35 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS R = 0.115 TYP R = 0.05 TYP 2.00 ±0.10 (2 SIDES) 3.00 ±0.10 (2 SIDES) 0.40 ± 0.10 4 6 1.65 ± 0.10 (2 SIDES) PIN 1 NOTCH R0.20 OR 0.25 × 45° CHAMFER PIN 1 BAR TOP MARK (SEE NOTE 6) 3 0.200 REF 0.75 ±0.05 1 (DCB6) DFN 0405 0.
PAGE 18
LT6700/LT6700HV PACKAGE INFORMATION S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 0.62 MAX 2.90 BSC (NOTE 4) 0.95 REF 1.22 REF 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 6 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.
PAGE 19
LT6700/LT6700HV REVISION HISTORY (Revision history begins at Rev G) REV DATE DESCRIPTION PAGE NUMBER G 5/10 Power Supplies section updated H 6/13 Web hyperlinks added 1-20 Addition of MP grade in SOT23 package 2, 3 Modified part number header for clarity 14 1 to 20 6700123fh Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use.
PAGE 20
LT6700/LT6700HV TYPICAL APPLICATIONS PowerPath™ Controller B0520LW “WART” INPUT 3.3V NOM VSUPPLY 1.6V MIN 3V NOM Si2301DS 10k 1k 1M ALKALINE AA CELLS 100k 1M + VS +INA OUTA + VWART > 3.1V LT6700-3 R2 150k VBATT > 2V +INB OUTB GND R1 249k 1µF 6700123 TA04 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 48V Status Monitor + 33k 22V CMPZ5251B 1.