LT6700 LINER [Linear Technology], LT6700 Datasheet

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LT6700

Manufacturer Part Number
LT6700
Description
Micropower, Low Voltage, Dual Comparator with 400mV Reference
Manufacturer
LINER [Linear Technology]
Datasheet

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FeaTures
applicaTions
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Typical applicaTion
ALKALINE
AA CELLS
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
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
+
+
0.1µF
®
1M
63.4k
261k
Input also Includes Ground
Micropower Battery Monitor
LT6700-3
+
+
V
REFERENCE
R
= 400mV
COMP B
COMP A
V
S
6700123 TA01
1M
1M
MONITOR CONSUMES ~10µA
HYSTERESIS IS APPROXIMATELY
2% OF TRIP VOLTAGE
V
V
V
1.4V (MIN)
3V (NOM)
BATT
BATT
BATT
> 1.6V
> 2V
DescripTion
The LT
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, Low Voltage,
®
6700/LT6700HV combine two micropower, low
Dual Comparator with
400mV Reference
406
404
402
400
398
396
394
392
390
–60
LT6700/LT6700HV
TWO TYPICAL PARTS
COMP A AND B
V
S
–40 –20 0
Comparator Thresholds
= 5V
#1A
#1B
vs Temperature
TEMPERATURE (°C)
20 40 60 80 100
#2A
#2B
FALLING INPUT
RISING INPUT
6700123 TA02
120
6700123fg


Related parts for LT6700

LT6700 Summary of contents

Page 1

... 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 ...

Page 2

... GND) ..........................18.5V S 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 ...........................– ...

Page 3

... LT6700HVIS6-3#TRMPBF LT6700HVIS6-3#TRPBF LT6700HS6-3#TRMPBF LT6700HS6-3#TRPBF LT6700HVHS6-3#TRMPBF LT6700HVHS6-3#TRPBF LT6700CDCB-1#TRMPBF LT6700CDCB-1#TRPBF LT6700IDCB-1#TRMPBF LT6700IDCB-1#TRPBF LT6700HDCB-1#TRMPBF LT6700HDCB-1#TRPBF LT6700MPDCB-1#TRMPBF LT6700MPDCB-1#TR LT6700CDCB-2#TRMPBF LT6700CDCB-2#TRPBF LT6700IDCB-2#TRMPBF LT6700IDCB-2#TRPBF LT6700HDCB-2#TRMPBF LT6700HDCB-2#TRPBF LT6700MPDCB-2#TRMPBF LT6700MPDCB-2#TR ...

Page 4

... T l otherwise specified (Notes 4, 5). SYMBOL PARAMETER V Rising Input Threshold Voltage (Note 6) TH(R) V Falling Input Threshold Voltage (Note 6) TH( 25°C, (LT6700-1/LT6700-2/LT6700-3) unless otherwise specified. A CONDITIONS R = 100k Swing 1. ...

Page 5

... Falling Input Threshold Voltage (Note 6) TH(F) HYS HYS = V – V TH(R) TH(F) I Input Bias Current B V Output Low Voltage OL I Output Leakage Current OFF I Supply Current S ≤ 70°C, (LT6700C-1/LT6700C-2/LT6700C-3) unless A CONDITIONS V = 1.4V, 5V, 12V, 18V 100k Swing 1.4V, 18V 1.4V 18V ...

Page 6

... SYMBOL PARAMETER V Rising Input Threshold Voltage (Note 6) TH(R) V Falling Input Threshold Voltage (Note 6) TH(F) HYS HYS = V – V TH(R) TH(F) I Input Bias Current B V Output Low Voltage OL  ≤ 125°C, (LT6700H-1/LT6700H-2/LT6700H-3) A CONDITIONS R = 100k Swing 1. 12V 18V S ...

Page 7

... T l unless otherwise specified (Notes 4, 5). SYMBOL PARAMETER I Output Leakage Current OFF I Supply Current 25°C, (LT6700HV-1/LT6700HV-2/LT6700HV-3) unless otherwise specified. A SYMBOL PARAMETER V Rising Input Threshold Voltage (Note 6) TH(R) V Falling Input Threshold Voltage (Note 6) TH(F) HYS HYS = V – V ...

Page 8

... MIN TYP MAX 390 410 l 392 408 l 389 411 l 388 412 l 382.5 404.5 l 383.5 403.5 l 381.5 405.5 l 380.5 406 11.5 l ±15 l ± ...

Page 9

... 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 A CONDITIONS ...

Page 10

... Comparator Core Supply Voltage. The parts are char- S acterized for operation with 1.4V ≤ V used 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 LT6700-3 LT6700HV-3 COMP B + ...

Page 11

... TEMPERATURE (°C) Hysteresis vs Temperature 1. 12V 18V – –60 –40 TEMPERATURE (°C) LT6700/LT6700HV Distribution of Hysteresis 25° 25° 4.8 5.6 6.4 ...

Page 12

... LT6700/LT6700HV Typical perForMance characTerisTics Minimum Supply Voltage 1 0 –1 –2 – 25° 85°C – 125° –55°C A –5 0.9 1.1 1.3 1.5 1.7 1.9 SUPPLY VOLTAGE (V) 6700123 G10 Supply Current vs Output Sink Current 1000 T = –40° 1. 12V 18V ...

Page 13

... Rise and Fall Times vs Output Pull-Up Resistor 100 20pF 25° RISE FALL 1 0.1 0.01 0 100 100 OUTPUT PULL-UP RESISTOR (kΩ) LT6700/LT6700HV Output Saturation Voltage vs Output Sink Current 1000 T = 85° 1. 12V 18V S 100 10 1 100 0.001 ...

Page 14

... It is recommended that the filter have a time constant: t > V /100 RC N Where V is the peak-peak supply noise in millivolts and milliseconds. RC This filter will also increase the start-up time of the LT6700 by reducing the rate at which the supply can change. When 6700123fg ...

Page 15

... LT6700 will increase to (0.17ms + 0.25 • • ΔV START RC Where t and t are in milliseconds and ΔV START RC change in supply in volts. The low supply current of the LT6700 should not cause significant voltage drop due maximum series R ...

Page 16

... DELETE FOR PWM MODE † CONNECT FOR PWM MODE †† OPTIMIZED FOR 2kHz ΔΣ SAMPLING LT6700HV lends itself nicely to forming a charge-balancing PWM function. The circuit shown in Figure 3 forms a PWM 1.4V TO 18V (I ≈ 10µA) S that is intended to transmit an isolated representation of a voltage difference, rather like an isolated instrumentation ...

Page 17

... SIDES 0.05 TYP 3.00 ±0.10 1.65 ± 0.10 (2 SIDES) (2 SIDES) 0.75 ±0.05 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE TOP AND BOTTOM OF PACKAGE LT6700/LT6700HV 0.40 ± 0.10 TYP 4 6 PIN 1 NOTCH R0.20 OR 0.25 × 45° CHAMFER 3 (DCB6) DFN 0405 1 0.25 ± 0.05 0.50 BSC 1.35 ± ...

Page 18

... LT6700/LT6700HV package inForMaTion 0.62 0.95 MAX REF 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF 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 ...

Page 19

... Modified part number header for clarity 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. LT6700/LT6700HV PAGE NUMBER ...

Page 20

... HYSTERESIS ZONES APPROXIMATELY 2% OF TRIP VOLTAGE PowerPath IS A TRADEMARK OF LINEAR TECHNOLOGY CORPORATION 48V Status Monitor + 33k 1.74M V S +INA OUTA V 7.87k LT6700-1 IN –INB OUTB GND 0.1µF 10k 5.1V CMPZ5231B – COMMENTS 1.1V (Min) Supply Voltage, ±1.4mV (Max) Input Offset 1.182 ±1% Reference, ±10mV (Max) Input Offset 2.5µ ...

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