LT6700-1 Linear Technology, LT6700-1 Datasheet

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LT6700-1

Manufacturer Part Number
LT6700-1
Description
(LT6700-x) Micropower / Low Voltage / SOT-23 / Dual Comparator
Manufacturer
Linear Technology
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Internal 400mV Reference
Combined Reference Accuracy and Offset
± 1.5% Max at 25°C
Wide Supply Range: 1.4V to 18V
Specified for –40 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 Allows Level Translation
Choice of Input Polarities: LT6700-1/LT6700-2/
LT6700-3
Available in Low Profile (1mm) SOT-23 (ThinSOT
and 2mm × 3mm DFN Packages
Battery-Powered System Monitoring
Threshold Detectors
Window Comparators
Relay Driving
Optoisolator Driving
Industrial Control Systems
Handheld Instruments
ALKALINE
AA CELLS
+
+
®
1M
63.4k
261k
Input also Includes Ground
U
Micropower Battery Monitor
LT6700-3
+
+
V
REFERENCE
R
= 400mV
COMP B
COMP A
U
V
S
6700123 TA01
0.1µF
1M
1M
MONITOR CONSUMES ~10µA
HYSTERESIS IS APPROXIMATELY
2% OF TRIP VOLTAGE
V
V
V
1.4V (MIN)
3V (NOM)
BATT
BATT
BATT
TM
> 1.6V
> 2V
)
DESCRIPTIO
The LT
micropower, low voltage comparators with a 400mV
reference in a 6-lead SOT-23 or tiny DFN package. Oper-
ating with supplies from 1.4V up to 18V, these devices
draw only 6.5µA typical, making them ideal for low voltage
system monitoring. Hysteresis is included in the com-
parators, 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, independent
of supply voltage. The output stage sinking capability is
guaranteed greater than 5mA over temperature.
The three versions of this part differ by the polarity of the
available comparator inputs. The LT6700-1 has one in-
verting input and one noninverting input, making it suit-
able for use as a window comparator. The LT6700-2 has
two inverting inputs and the LT6700-3 has two noninvert-
ing inputs. All versions are offered in commercial,
industrial and automotive temperature ranges.
LT6700-1/LT6700-2/LT6700-3
Over-The-Top is a registered trademark of Linear Technology.
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Micropower, Low Voltage,
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
Dual Comparator with
6700-1/LT6700-2/LT6700-3 combine two
406
404
402
400
398
396
394
392
390
–60
400mV Reference
TWO TYPICAL PARTS
COMP A AND B
V
U
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
6700123fc
1

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LT6700-1 Summary of contents

Page 1

... The output stage sinking capability is guaranteed greater than 5mA over temperature. The three versions of this part differ by the polarity of the available comparator inputs. The LT6700-1 has one in- verting input and one noninverting input, making it suit- able for use as a window comparator. The LT6700-2 has two inverting inputs and the LT6700-3 has two noninvert- ing inputs ...

Page 2

... LT6700-1/LT6700-2/LT6700 ABSOLUTE AXI U RATI GS Total Supply Voltage (V to GND) ......................... 18.5V S Input Voltage (+IN, –IN) (Note 3) ...................................... 18.5V to (GND – 0.3V) Output Voltage (OUT) ................. 18.5V to (GND – 0.3V) Output Short-Circuit Duration (Note 2) ............ Indefinite Input Current (Note 3) ........................................ –10mA Operating Temperature Range (Note 4) LT6700CS6/LT6700CDCB-1/-2/-3 ...... – 40°C to 85°C LT6700IS6/LT6700IDCB-1/-2/-3 ........ – ...

Page 3

... Rising Input Threshold Voltage (Note 6) TH(R) V Falling Input Threshold Voltage (Note 6) R 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 LT6700-1/LT6700-2/LT6700 25°C, unless otherwise specified. A CONDITIONS R = 100k Swing 1. 12V S ...

Page 4

... LT6700-1/LT6700-2/LT6700-3 ELECTRICAL CHARACTERISTICS denotes the specifications which apply over the temperature range of 0°C ≤ T The ● I Supply Current S denotes the specifications which apply over the temperature range of –40°C ≤ T The ● SYMBOL PARAMETER V Rising Input Threshold Voltage (Note 6) ...

Page 5

... GND INB: External Input for Comparator Section B. The voltage on this pin can range from –0.3V to 18V with respect to GND regardless of V the LT6700-3, and inverting for the LT6700-1 and LT6700-2. The other section B comparator input is inter- nally connected to the 400mV reference Comparator Core Supply Voltage ...

Page 6

... LT6700-1/LT6700-2/LT6700 TYPICAL PERFOR A CE CHARACTERISTICS Distribution of Rising Input Threshold Voltage 25° 394 396 398 400 402 404 406 RISING INPUT THRESHOLD VOLTAGE (mV) 6700123 G01 Rising Input Threshold Voltage vs Temperature 404 ...

Page 7

... 125° –55°C A 100 10 CURRENT IS GOING OUT OF THE DEVICE 1 –0.3 –0.2 –0.1 INPUT VOLTAGE (V) 6700123 G16 LT6700-1/LT6700-2/LT6700-3 Quiescent Supply Current vs Supply Voltage 25° 125° 85° –55° LOAD CURRENT ...

Page 8

... LT6700-1/LT6700-2/LT6700 TYPICAL PERFOR A CE CHARACTERISTICS Output Saturation Voltage vs Output Sink Current 1000 T = –40° 1. 12V 18V S 100 10 1 0.001 0.01 0 100 OUTPUT SINK CURRENT (mA) 6700123 G19 Output Short-Circuit Current 25° ...

Page 9

... V Flexible Window Comparator Using the LT6700-1 as shown in the circuits of Figure 1, the wire-AND configuration permits high accuracy win- dow functions to be implemented with a simple 3-resistor voltage divider network. The section A comparator pro- ...

Page 10

... GND 0.1µF 6700123 F01 0.1µF 1.4V TO 18V (I 2 • REF R 499k 220k 220k* V SET S T < T +INA OUTA LT6700-1 10k –INB OUTB GND R 3.3µF T 499k TH 6700123 F02 (e.g., YSI 44015, 1.00MΩ AT 25° SET TH SET *RESISTANCE MAY REQUIRE OPTIMIZATION FOR OPERATION ...

Page 11

... COIN CELL 10k** 470Ω 5 • REF 412k* V NC7S14 309k* S +INA OUTA LT6700-1 309k* 10k –INB OUTB GND †† 0.22µF 0.1µF 100k* 100k* 1% METAL FILM DELETE FOR PWM MODE CONNECT FOR PWM MODE OPTIMIZED FOR 2kHz ∆Σ SAMPLING, f ≈ ...

Page 12

... MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 0.30 – 0.45 6 PLCS (NOTE 3) 0.01 – 0.10 1.90 BSC S6 TSOT-23 0302 48V Status Monitor 33k 22V CMPZ5251B 1.74M 3V/ +INA OUTA 7.87k LT6700-1 27k 33k V OUT –INB OUTB LOW = (39V < V GND 1 6 0.1µF MOC-207 10k 2 5 5.1V CMPZ5231B 6700123 TA03 LT/LT 1005 REV C • ...

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