Rainbow-electronics MAX934 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX934. Rainbow Electronics MAX934 User Manual Manual do Utilizador

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_______________General Description
The MAX931-MAX934 single, dual, and quad micropower,
low-voltage comparators plus an on-board 2% accurate
reference feature the lowest power consumption available.
These comparators draw less than 4µA supply current
over temperature (MAX931), and include an internal
1.182V ±2% voltage reference, programmable hysteresis,
and TTL/CMOS outputs that sink and source current.
Ideal for 3V or 5V single-supply applications, the
MAX931-MAX934 operate from a single +2.5V to +11V
supply (or a ±1.25V to ±5V dual supply), and each
comparator’s input voltage range extends from the
negative supply rail to within 1.3V of the positive supply.
The MAX931-MAX934’s unique output stage continuously
sources as much as 40mA. And by eliminating power-
supply glitches that commonly occur when comparators
change logic states, the MAX931-MAX934 minimize
parasitic feedback, which makes them easier to use.
The single MAX931 and dual MAX932/MAX933 provide a
unique and simple method for adding hysteresis without
feedback and complicated equations, using the HYST pin
and two resistors.
For applications that require increased precision with
similar power requirements, see the MAX921-MAX924 data
sheet. These devices include a 1% precision reference.
________________________Applications
Battery-Powered Systems
Threshold Detectors
Window Comparators
Oscillator Circuits
Alarm Circuits
____________________________Features
Ultra-Low 4µA Max Quiescent Current
Over Extended Temp. Range (MAX931)
Power Supplies:
Single +2.5V to +11V
Dual ±1.25V to ±5.5V
Input Voltage Range Includes Negative Supply
Internal 1.182V ±2% Bandgap Reference
Adjustable Hysteresis
TTL-/CMOS-Compatible Outputs
12µs Propagation Delay (10mV Overdrive)
No Switching Crowbar Current
40mA Continuous Source Current
Available in Space-Saving µMAX Package
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
________________________________________________________________
Maxim Integrated Products
1
MAX931
OUT
V-
GND
V+
21
8
3
4
5
6
7
THRESHOLD DETECTOR
V
IN
IN+
IN-
HYST
REF
__________Typical Operating Circuit
19-0194; Rev 1; 2/97
8 SO-40°C to +85°CMAX931ESA
8 µMAX0°C to +70°CMAX931CUA
8 SO0°C to +70°CMAX931CSA
8 Plastic DIP0°C to +70°C
MAX931CPA
PIN-PACKAGETEMP. RANGEPART
16-Pin
DIP/SO
No4YesMAX934
8-Pin
DIP/SO/
µMAX
Yes2YesMAX933
8-Pin
DIP/SO/
µMAX
Yes2YesMAX932
8-Pin
DIP/SO/
µMAX
Yes1YesMAX931
PACK-
AGE
INTERNAL
HYSTERESIS
COMPARATORS
PER
PACKAGE
INTERNAL
2%
REFERENCE
PART
Ordering Information continued on last page.
For similar devices guaranteed over the military temp. range, see
the MAX921-MAX924 data sheet. The MAX931, MAX933, and
MAX934 are pin-compatible with the 1% accurate MAX921,
MAX923, and MAX924, respectively. The MAX932 and
MAX922 are not
pin-compatible.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
8 Plastic DIP-40°C to +85°CMAX931EPA
______________Ordering Information
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Resumo do Conteúdo

Página 1 - Comparators with 2% Reference

_______________General DescriptionThe MAX931-MAX934 single, dual, and quad micropower,low-voltage comparators plus an on-board 2% accuratereference fe

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MAX931-MAX934maximum difference between REF and HYST (50mV)will therefore produce a 100mV max hysteresis band.Use the following equations to determine

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Board Layout and BypassingPower-supply bypass capacitors are not needed if thesupply impedance is low, but 100nF bypass capacitorsshould be used when

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100nA for the thresholds to be accurate. R1 valuesup to about 10MΩ can be used, but values in the100kΩ to 1MΩ range are usually easier to deal with.I

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MAX931-MAX934Ultra Low-Power, Low-CostComparators with 2% Reference___________________________________________________________________________________

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MAX931-MAX934Ultra Low-Power, Low-Cost Comparators with 2% Reference14 _______________________________________________________________________________

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MAX931-MAX934Ultra Low-Power, Low-Cost Comparators with 2% Reference__________________________________________________________________________________

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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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MAX931-MAX934Ultra Low-Power, Low-Cost Comparators with 2% Reference2 ________________________________________________________________________________

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MAX931-MAX934Ultra Low-Power, Low-Cost Comparators with 2% Reference__________________________________________________________________________________

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MAX931-MAX934Ultra Low-Power, Low-CostComparators with 2% Reference4 _________________________________________________________________________________

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MAX931-MAX934Ultra Low-Power, Low-CostComparators with 2% Reference___________________________________________________________________________________

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MAX931-MAX934Ultra Low-Power, Low-Cost Comparators with 2% Reference6 ________________________________________________________________________________

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MAX931-MAX934Ultra Low-Power, Low-CostComparators with 2% Reference___________________________________________________________________________________

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MAX931-MAX934Ultra Low-Power, Low-Cost Comparators with 2% Reference8 ________________________________________________________________________________

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current falls. The reference will not function belowabout 2.2V, although the comparators will continue tooperate with a total supply voltage as low a

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