19-0194; Rev 1; 2/97
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
____________________________Features
o Ultra-Low 4µA Max Quiescent Current
Over Extended Temp. Range (MAX931)
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.
o Internal 1.182V ±2% Bandgap Reference
The MAX931-MAX934’s unique output stage continuously
sources as much as 40mA. And by eliminating powersupply glitches that commonly occur when comparators
change logic states, the MAX931-MAX934 minimize
parasitic feedback, which makes them easier to use.
o No Switching Crowbar Current
o Power Supplies:
Single +2.5V to +11V
Dual ±1.25V to ±5.5V
o Input Voltage Range Includes Negative Supply
o Adjustable Hysteresis
o TTL-/CMOS-Compatible Outputs
o 12µs Propagation Delay (10mV Overdrive)
o 40mA Continuous Source Current
o Available in Space-Saving µMAX Package
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.
______________Ordering Information
MAX931CPA
0°C to +70°C
8 Plastic DIP
For applications that require increased precision with
similar power requirements, see the MAX921-MAX924 data
sheet. These devices include a 1% precision reference.
MAX931CSA
MAX931CUA
MAX931EPA
MAX931ESA
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
8 SO
8 µMAX
8 Plastic DIP
8 SO
INTERNAL COMPARATORS
INTERNAL
2%
PER
HYSTERESIS
REFERENCE
PACKAGE
PART
PACKAGE
MAX931
Yes
1
Yes
8-Pin
DIP/SO/
µMAX
MAX932
Yes
2
Yes
8-Pin
DIP/SO/
µMAX
MAX933
Yes
2
Yes
8-Pin
DIP/SO/
µMAX
MAX934
Yes
4
No
16-Pin
DIP/SO
PART
TEMP. RANGE
PIN-PACKAGE
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
VIN
7
V+
3 IN+
OUT 8
4 IN-
________________________Applications
Battery-Powered Systems
Threshold Detectors
5 HYST
6 REF
MAX931
Window Comparators
Oscillator Circuits
Alarm Circuits
V2
GND
1
THRESHOLD DETECTOR
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX931-MAX934
_______________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.
