Rainbow-electronics MAX924 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Recetores e Amplificadores Rainbow-electronics MAX924. Rainbow Electronics MAX924 User Manual Manual do Utilizador

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_______________General Description
The MAX921–MAX924 single, dual, and quad micro-
power, low-voltage comparators feature the lowest
power consumption available. These comparators draw
less than 4µA supply current over temperature
(MAX921/MAX922), and include an internal 1.182V
±1% voltage reference, programmable hysteresis, and
TTL/CMOS outputs that sink and source current.
Ideal for 3V or 5V single-supply applications, the
MAX921–MAX924 operate from a single +2.5V to +11V
supply (or a ±1.25V to ±5V dual supply), and each
comparator’s input voltage range swings from the
negative supply rail to within 1.3V of the positive
supply.
The MAX921–MAX924’s unique output stage con-
tinuously sources as much as 40mA. And by eliminating
power-supply glitches that commonly occur when com-
parators change logic states, the MAX921–MAX924
minimize parasitic feedback, which makes them easier to
use.
The single MAX921 and dual MAX923 provide a unique
and simple method for adding hysteresis without
feedback and complicated equations, simply by using
the HYST pin and two resistors.
________________________Applications
Battery-Powered Systems
Threshold Detectors
Window Comparators
Oscillator Circuits
____________________________Features
µMAX Package—Smallest 8-Pin SO
(MAX921/MAX922/MAX923)
Ultra-Low 4µA Max Quiescent Current
Over Extended Temp. Range (MAX921)
Power Supplies:
Single +2.5V to +11V
Dual ±1.25V to ±5.5V
Input Voltage Range Includes Negative Supply
Internal 1.182V ±1% Bandgap Reference
Adjustable Hysteresis
TTL/CMOS-Compatible Outputs
12µs Propagation Delay (10mV Overdrive)
No Switching Crowbar Current
40mA Continuous Source Current
______________Ordering Information
Ordering Information continued at end of data sheet.
* Dice are tested at T
A
= +25°C, DC parameters only.
** Contact factory for availability and processing to MIL-STD-883.
MAX921–MAX924
Ultra Low-Power,
Single/Dual-Supply Comparators
________________________________________________________________
Maxim Integrated Products
1
MAX921
OUT
IN+
HYST
REF
V-
GND
V+
21
4
5
6
8
3
7
IN-
THRESHOLD DETECTOR
V
IN
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.
19-0115; Rev 3; 3/95
PART TEMP. RANGE PIN-PACKAGE
MAX921CPA
0°C to +70°C 8 Plastic DIP
MAX921CSA 0°C to +70°C 8 SO
MAX921C/D 0°C to +70°C Dice*
PART
INTERNAL 1%
PRECISION
REFERENCE
COMPARATORS
PER
PACKAGE
INTERNAL
HYSTERESIS
PACKAGE
MAX921 Yes 1 Yes
8-Pin
DIP/SO/µMAX
MAX922 No 2 No
8-Pin
DIP/SO/µMAX
MAX923 Yes 2 Yes
8-Pin
DIP/SO/µMAX
MAX924 Yes 4 No
16-Pin
DIP/SO/µMAX
MAX921EPA -40°C to +85°C 8 Plastic DIP
MAX921ESA -40°C to +85°C 8 SO
MAX921MJA -55°C to +125°C 8 CERDIP**
MAX921CUA 0°C to +70°C 8 µMAX
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Resumo do Conteúdo

Página 1 - Ultra Low-Power

_______________General DescriptionThe MAX921–MAX924 single, dual, and quad micro-power, low-voltage comparators feature the lowestpower consumption av

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MAX921–MAX924comparator is used with the reference, the combinedpeak-to-peak noise is about 1mV. This, of course, ismuch higher than the RMS noise of

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6. Verify the threshold voltages with these formulas:Board Layout and BypassingPower-supply bypass capacitors are not needed if thesupply impedance is

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MAX921–MAX924Ultra Low-Power, Single/Dual-Supply Comparators12 ______________________________________________________________________________________2

Página 5 - MAX921-MAX924

MAX921–MAX924Ultra Low-Power, Single/Dual-Supply Comparators______________________________________________________________________________________ 13I

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MAX921–MAX924Ultra Low-Power, Single/Dual-Supply Comparators14 ______________________________________________________________________________________1

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MAX921–MAX924Ultra Low-Power, Single/Dual-Supply Comparators______________________________________________________________________________________ 15_

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Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses arei

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MAX921–MAX924Ultra Low-Power, Single/Dual-Supply Comparators2 _______________________________________________________________________________________A

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MAX921–MAX924Ultra Low-Power, Single/Dual-Supply Comparators_______________________________________________________________________________________ 3P

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MAX921–MAX924Ultra Low-Power, Single/Dual-Supply Comparators4 ________________________________________________________________________________________

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MAX921-MAX924Ultra Low-Power, Single/Dual-Supply Comparators_______________________________________________________________________________________51.

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MAX921–MAX924Ultra Low-Power, Single/Dual-Supply Comparators6 ________________________________________________________________________________________

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MAX921–MAX924Ultra Low-Power, Single/Dual-Supply Comparators_______________________________________________________________________________________ 7P

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MAX921–MAX924Ultra Low-Power, Single/Dual-Supply Comparators8 ________________________________________________________________________________________

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about 2.2V, although the comparators will continue tooperate with a total supply voltage as low as 1V. Whilethe MAX924 has comparators that may be us

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