LTC1040 Dual Micropower Comparator FEATURES DESCRIPTIO n Micropower The LTC 1040 is a monolithic CMOS dual comparator 1.5m W (1 Sample/Second) manufactured using Linear Technologys enhanced TM n Power Supply Flexibility LTCMOS silicon gate process. Extremely low operating Single Supply 2.8V to 16V power levels are achieved by internally switching the Split Supply 2.8V to 8V comparator ON for short periods of time. The CMOS n Guaranteed Max Offset 0.75mV output logic holds the output information continuously n Guaranteed Max Tracking Error Between Input while not consuming any power. Pairs 0.1% In addition to switching power ON, a switched output is n Input Common Mode Range to Both Supply Rails provided to drive external loads during the comparators n TTL/CMOS Compatible with 5V or Single 5V active time. This allows not only low comparator power, Supply but low total system power. n Input Errors are Stable with Time and Temperature Sampling is controlled by an external strobe input or an U internal oscillator. The oscillator frequency is set by an APPLICATIO S external RC network. n Battery-Powered Systems Each comparator has a unique input structure, giving two n Remote Sensing differential inputs. The output of the comparator will be n Window Comparator high if the algebraic sum of the inputs is positive and low n BANG-BANG Controllers if the algebraic sum of the inputs is negative. , LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS is a trademark of Linear Technology Corporation. TYPICAL APPLICATIO Window Comparator with Symmetric Window Limits Typical LTC1040 Supply Current vs Sampling Frequency 1000 V = 5V S LTC1040 100 V + IN A = 1 WHEN OUT COMP A + V > V + D IN C 10 A + B = 1 WHEN 1 R = 10M EXT V D V V + D C IN C V + C 0.10 EXTERNALLY STROBED B = 1 WHEN OUT COMP B V < V D + IN C D 0.01 0.1 1 10 100 1,000 10,000 SAMPLING FREQUENCY, f (Hz) S LTC1040 TA02 LTC1040 TA01 1040fa 1 SUPPLY CURRENT, I (A) S U ULTC1040 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW + ORDER PART Total Supply Voltage (V to V ) ............................... 18V + 1 18 V STROBE + NUMBER lnput Voltage ........................ (V + 0.3V) to (V 0.3V) 2 17 V ON/OFF P-P Operating Temperature Range LTC1040CN 3 16 OSC A + B LTC1040C ..................................... 40 C T 85 C LTC1040CSW A 4 15 B A OUT OUT LTC1040M (OBSOLETE) .................... 55 C to 125 C + + 5 14 B1 A1 Storage Temperature Range ................. 55 C to 150 C 6 13 B1 A1 + Lead Temperature (Soldering, 10 sec).................. 300 C + 7 12 B2 A2 Output Short-Circuit Duration .......................Continuous 8 11 B2 A2 9 10 V GND N PACKAGE SW PACKAGE 18-LEAD PDIP 18-LEAD PLASTIC SO WIDE T = 110C, q = 120C/W (N) JMAX JA T = 125C, q = 85C/W (SW) JMAX JA J PACKAGE LTC1040MJ 18-LEAD CERDIP T = 150C, q = 80C/W LTC1040CJ JMAX JA OBSOLETE PACKAGE Consider the N18 Package as an Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating + temperature range, otherwise specifications are at T = 25 C. Test conditions: V = 5V, V = 5V, unless otherwise noted. A LTC1040M/LTC1040C SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Offset Voltage (Note 2) Split Supplies 2.8V to 6V l 0.3 0.75 mV OS Single Supply (V = GND) 2.8V to 6V Split Supplies 6V to 8V l 1 4.5 mV Single Supply (V = GND) 6V to 15V Tracking Error Between Split Supplies 2.8V to 8V l 0.05 0.1 % = GND) 2.8 to 16V Input Pairs (Notes 2 and 3) Single Supplies (V I Input Bias Current OSC = GND 0.3 nA BIAS R Average Input Resistance f = 1kHz (Note 4) l 20 30 MW IN S + CMR Common Mode Range l V V V PSR Power Supply Range Split Supplies l 2.8 8 V Single Supplies (V = GND) l 2.8 16 V + I Power Supply ON Current (Note 5) V = 5V, V On l 1.2 3 mA S(ON) P-P + I Power Supply OFF Current (Note 5) V = 5V, V Off LTC1040C l 0.001 0.5 m A S(OFF) P-P LTC1040M l 0.001 5 m A t Response Time (Note 6) 60 80 100 m s D A, B, A + B and ON/OFF Outputs (Note 7) + V Logic 1 Output Voltage V = 4.75V, l = 360m A l 2.4 4.4 V OH OUT + V Logic 0 Output Voltage V = 4.75V, l = 1.6mA l 0.25 0.4 V OL OUT 1040fa 2 U WWW