MAX931 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – Ultra Low-Power, Low-Cost Comparators with 2eference

19-0194; Rev 1; 2/97
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
_______________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.
PART
INTERNAL
2%
REFERENCE
COMPARATORS
PER
PACKAGE
INTERNAL
HYSTERESIS
PACK-
AGE
MAX931 Yes
1
MAX932 Yes
2
MAX933 Yes
2
MAX934 Yes
4
8-Pin
Yes
DIP/SO/
µMAX
8-Pin
Yes
DIP/SO/
µMAX
8-Pin
Yes
DIP/SO/
µMAX
No
16-Pin
DIP/SO
________________________Applications
Battery-Powered Systems
Threshold Detectors
Window Comparators
Oscillator Circuits
Alarm Circuits
____________________________Features
o Ultra-Low 4µA Max Quiescent Current
Over Extended Temp. Range (MAX931)
o Power Supplies:
Single +2.5V to +11V
Dual ±1.25V to ±5.5V
o Input Voltage Range Includes Negative Supply
o Internal 1.182V ±2% Bandgap Reference
o Adjustable Hysteresis
o TTL-/CMOS-Compatible Outputs
o 12µs Propagation Delay (10mV Overdrive)
o No Switching Crowbar Current
o 40mA Continuous Source Current
o Available in Space-Saving µMAX Package
______________Ordering Information
PART
MAX931CPA
MAX931CSA
MAX931CUA
MAX931EPA
MAX931ESA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
8 µMAX
8 Plastic DIP
8 SO
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.
__________Typical Operating Circuit
V_IN
3 IN+
4 IN-
7
V+
OUT 8
5 HYST
6 REF
MAX931
V-
GND
2
1
THRESHOLD DETECTOR
________________________________________________________________ Maxim Integrated Products 1
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