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LTC1040

Linear Technology
Part Number LTC1040
Manufacturer Linear Technology
Description DUAL MICROPOWER COMPARATOR
Published Mar 22, 2005
Detailed Description U U LTC1040 Dual Micropower Comparator FEATURES s Micropower 1.5µW (1 Sample/Second) s Power Supply Flexibility Single...
Datasheet PDF File LTC1040 PDF File

LTC1040
LTC1040

Overview
U U LTC1040 Dual Micropower Comparator FEATURES s Micropower 1.
5µW (1 Sample/Second) s Power Supply Flexibility Single Supply 2.
8V to 16V Split Supply ±2.
8V to ±8V s Guaranteed Max Offset 0.
75mV s Guaranteed Max Tracking Error Between Input Pairs ± 0.
1% s Input Common Mode Range to Both Supply Rails s TTL/CMOS Compatible with ±5V or Single 5V Supply s Input Errors are Stable with Time and Temperature U APPLICATIO S s Battery-Powered Systems s Remote Sensing s Window Comparator s BANG-BANG Controllers DESCRIPTIO The LTC®1040 is a monolithic CMOS dual comparator manufactured using Linear Technology’s enhanced LTCMOSTM silicon gate process.
Extremely low operating power levels are achieved by internally switching the comparator ON for short periods of time.
The CMOS output logic holds the output information continuously while not consuming any power.
In addition to switching power ON, a switched output is provided to drive external loads during the comparator’s active time.
This allows not only low comparator power, but low total system power.
Sampling is controlled by an external strobe input or an internal oscillator.
The oscillator frequency is set by an external RC network.
Each comparator has a unique input structure, giving two differential inputs.
The output of the comparator will be high if the algebraic sum of the inputs is positive and low 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 LTC1040 VIN + – + COMP A – VC + – + COMP B ∆– AOUT = “1” WHEN VIN > VC + ∆ A + B = “1” WHEN VC – ∆ ≤ VIN ≤ VC + ∆ BOUT = “1” WHEN VIN < VC – ∆ LTC1040 • TA01 SUPPLY CURRENT, IS (µA) Typical LTC1040 Supply Current vs Sampling Frequency 1000 VS = ±5V 100 10 1 REXT = 10M 0.
10 EXTERNALLY STROBED 0.
01 0.
1 1 10 100 1,000 10,000 SAMPLING FREQUENCY, fS (Hz) LTC1040 • TA02...


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