Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsLinear ICsLinear IC - Comparator Multi-purpose CMOS, Push pull, Rail-to-rail, TTL TSOT 23 8

LTC6702

6702fa

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Tiny Micropower,

Low Voltage

Dual Comparators

The LTC

6702 is an extremely small dual comparator

designed to maximize battery life while providing both

speed and low voltage operation in applications where

board space is a premium.

These comparators operate on supplies between 1.7V and

5.5V, and have a maximum guaranteed propagation delay

of 500ns while drawing only 30µA maximum quiescent

current. Internal hysteresis desensitizes the LTC6702 to

input noise and makes it easy to use, even with slow mov-

ing signals. CMOS inputs allow the use of large source

impedances.

The LTC6702 is available in the 8-pin SOT-23 and the tiny

2mm × 2mm DFN package.

Propagation Delay vs Input Overdrive

Low Supply Operation: 1.7V Minimum

Low Supply Current: 30μA/Comparator Maximum

Propagation Delay: 500ns Maximum (–40°C to

125°C)

3.2MHz Toggle Frequency

Input Voltage Range Extends 100mV Below Ground

Internal Hysteresis: 4mV

High Output Drive: TTL and CMOS Compatible

Speciﬁ ed at ±15mA (–40°C to 125°C),

Capacitive Load Handling to 10,000pF

Speciﬁ ed for –40°C to 125°C Temperature Range

Available in Low Proﬁ le (1mm) ThinSOT™ and

2mm × 2mm DFN Packages

Battery Powered Systems

Window Comparators

Threshold Detectors/Discriminators

Clock Regeneration

Automotive Sensing and Controls

Clock Regeneration Circuit

0.1µF

6702 TA01

–

1/2 LTC6702

LT6650

RECOVERED

CLOCK

(UP TO 3.2MHz)

CLOCK INPUT > 100mV

P-P

0.1µF

= 3V

= 400mV

REFERENCE

OUT

INPUT OVERDRIVE (mV)

PROPAGATION DELAY (ns)

400

500

600

30 50 80

6702 TA01b

300

200

100

10 20

60 70

FALLING

RISING

= 5V

STEP

= 100mV

LOAD

= 10pF

= 25°C

L, LT, LTC, LTM, 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.

Summary of content (12 pages)

PAGE 1
LTC6702 Tiny Micropower, Low Voltage Dual Comparators FEATURES n n n n n n n n n DESCRIPTION Low Supply Operation: 1.7V Minimum Low Supply Current: 30μA/Comparator Maximum Propagation Delay: 500ns Maximum (–40°C to 125°C) 3.
PAGE 2
LTC6702 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage (V+ to GND) ........................................6V Input Voltage...............................................................6V Input Current........................................................–10mA Output Short-Circuit Duration (Note 2) ............ Indeﬁnite Operating Temperature Range (Note 3) LTC6702C ...........................................–40°C to 85°C LTC6702I .............................................–40°C to 85°C LTC6702H ..
PAGE 3
LTC6702 ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full speciﬁed temperature range, otherwise speciﬁcations are at TA = 25°C. V+ = 3V, VCM = 1.5V, COUT = 20pF, unless otherwise noted. SYMBOL PARAMETER CONDITIONS V+ Supply Voltage Guaranteed by PSRR Supply Current per Comparator V+ = 3V I+ MIN l TYP 1.7 V 24 30 40 μA μA 25 32 42 μA μA 1 3.5 5 6 mV mV mV 4.3 6.2 7.2 8.
PAGE 4
LTC6702 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Supply Voltage Supply Current vs Temperature 35 40 125°C 25°C –55°C 20 10 0 1 2 3 4 SUPPLY VOLTAGE (V) 5 30 V+ = 5V 25 V+ = 1.
PAGE 5
LTC6702 TYPICAL PERFORMANCE CHARACTERISTICS 380 360 340 RISING 320 FALLING RISING 280 600 100 500 V+ = 1.7V FALLING 400 RISING 300 FALLING 300 1000 3 5 4 SUPPLY VOLTAGE (V) 100 1000 LOAD CAPACITANCE (pF) 6702 G10 TA = 25°C OUTPUT VOLTAGE (V+-VOUT) (V) OUTPUT VOLTAGE (V) V+ = 1.7V V+ = 3V V+ = 5V 0.01 10 0.1 1 10 SINK CURRENT (mA) 100 100 1000 LOAD CAPACITANCE (pF) Output Voltage vs Temperature 90 TA = 25°C V+ = 1.7V 80 V+ = 3V 0.1 V+ = 5V 0.01 0.001 0.
PAGE 6
LTC6702 PIN FUNCTIONS OUT A (Pin 1): Output of Comparator A. –IN B (Pin 6): Inverting Input of Comparator B. –IN A (Pin 2): Inverting Input of Comparator A. OUT B (Pin 7): Output of Comparator B. +IN A (Pin 3): Noninverting Input of Comparator A. V+ (Pin 8): Positive Supply Voltage GND (Pin 4): Ground. Exposed Pad (Pin 9, DC Package Only): Ground. The Exposed Pad must be soldered to PCB. +IN B (Pin 5): Noninverting Input of Comparator B.
PAGE 7
LTC6702 APPLICATIONS INFORMATION The LTC6702 device is a fast (500ns delay), low power, low voltage (1.7V to 5.5V supply) general purpose dual comparator. It provides rail-to-rail outputs able to interface to TTL/CMOS, draws low supply currents (30μA/comparator), and has internal hysteresis (approximately 4mV). Hysteresis Each comparator has built-in hysteresis to simplify designs, to insure stable operation in the presence of noise at the inputs, and to reject supply rail noise.
PAGE 8
LTC6702 APPLICATIONS INFORMATION maintain micropower operation, the output stage uses a break-before-make circuit. The break interval of this circuit turns off both the pull-up and pull-down devices for tens of nanoseconds before activating the appropriate output transistor (depends on the output transition direction). Any load connected to the output will charge or discharge internal capacitance during this interval.
PAGE 9
LTC6702 TYPICAL APPLICATIONS High to Low Level Translator 1.8V LT6650 OUT IN 500mV GND 0.1μF – 24.9k 1μF FB OUT 1/2 LTC6702 6V 0V 1.8V 0V + 100k 6702 TA03 Micropower Battery Monitor with Fast Response VBATT R1 909k LTC6702 + LT1790-1.25 IN C1 0.1μF 0.1μF GND COMPB OUTB (0V IF VBATT < 2.1V) COMPA OUTA (0V IF VBATT < 2.
PAGE 10
LTC6702 PACKAGE DESCRIPTION DC Package 8-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1719 Rev A) 0.70 p0.05 2.55 p0.05 1.15 p0.05 0.64 p0.05 (2 SIDES) PACKAGE OUTLINE 0.25 p 0.05 0.45 BSC 1.37 p0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED R = 0.05 TYP 2.00 p0.10 (4 SIDES) PIN 1 BAR TOP MARK (SEE NOTE 6) R = 0.115 TYP 5 8 0.40 p 0.10 0.64 p 0.10 (2 SIDES) PIN 1 NOTCH R = 0.20 OR 0.25 s 45o CHAMFER (DC8) DFN 0106 REVØ 4 0.
PAGE 11
LTC6702 PACKAGE DESCRIPTION TS8 Package 8-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1637) 0.52 MAX 2.90 BSC (NOTE 4) 0.65 REF 1.22 REF 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.22 – 0.36 8 PLCS (NOTE 3) 0.65 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) 1.95 BSC TS8 TSOT-23 0802 NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3.
PAGE 12
LTC6702 TYPICAL APPLICATION Dual Low Side Current Sense Alarm 5.5V LED B V+ LTC6702 1k – LOAD B ILOADB LT6650 RSB 0.1Ω IN 0.1μF GND FB OUT COMP B 500mV 1μF + 24.9k LED A 1k 37.4k + 61.9k COMP A – LOAD A ILOADA GND RSA 0.1Ω 6702 TA05 LEDA ON IF ILOADA > 2.5A LEDB ON IF ILOADB > 5.0A RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC1441/LTC1442 Dual Ultralow Power Comparators with Reference 1.182V ±1% Reference, 8μs Propagation Delay, 5.