MAX931CPA ,Ultra Low-Power, Low-Cost Comparators with 2eferenceFeaturesThe MAX931-MAX934 single, dual, and quad micropower, ' Ultra-Low 4µA Max Quiescent Currentl ..
MAX931CPA ,Ultra Low-Power, Low-Cost Comparators with 2eferenceMAX931-MAX93419-0194; Rev 1; 2/97Ultra Low-Power, Low-CostComparators with 2% Reference____________ ..
MAX931CSA ,Ultra Low-Power, Low-Cost Comparators with 2eferenceapplications, the' Internal 1.182V ±2% Bandgap Reference MAX931-MAX934 operate from a single +2.5V ..
MAX931CSA ,Ultra Low-Power, Low-Cost Comparators with 2eferenceELECTRICAL CHARACTERISTICS—5V Operation (continued)(V+ = 5V, V- = GND = 0V, T = T to T , unless oth ..
MAX931CSA ,Ultra Low-Power, Low-Cost Comparators with 2eferenceMAX931-MAX93419-0194; Rev 1; 2/97Ultra Low-Power, Low-CostComparators with 2% Reference____________ ..
MAX931CSA ,Ultra Low-Power, Low-Cost Comparators with 2eferenceMAX931-MAX93419-0194; Rev 1; 2/97Ultra Low-Power, Low-CostComparators with 2% Reference____________ ..
MB88501H ,HIGH-SPEED CMOS SINGLE CHIP 4-BIT MICROCOMPUTER
MB88503H ,HIGH-SPEED CMOS SINGLE CHIP 4-BIT MICROCOMPUTER
MB8868A ,MOS Universal Asynchronous Receiver / Transmitter (UART)Features
I Full or Hall Duplex
Operation
I Completely Programmable
I Start Bit Generated
..
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MB89133A ,8-bit Proprietary MicrocontrollerFUJITSU SEMICONDUCTORDS07-12510-9EDATA SHEET8-bit Proprietary MicrocontrollerCMOS2F MC-8L MB89130/1 ..
MAX931CPA-MAX931CSA-MAX931CUA-MAX931EPA-MAX931ESA-MAX932CPA-MAX932CSA-MAX932CUA-MAX932ESA-MAX933CPA-MAX933CSA-MAX933CUA-MAX933ESA-MAX934CPE-MAX934CSE-MAX934EPE-MAX934ESE
Ultra Low-Power, Low-Cost Comparators with 2eference
_______________General DescriptionThe 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.
________________________ApplicationsBattery-Powered Systems
Threshold Detectors
Window Comparators
Oscillator Circuits
Alarm Circuits
____________________________FeaturesUltra-Low 4µA Max Quiescent Current
Over Extended Temp. Range (MAX931)Power Supplies:
Single +2.5V to +11V
Dual ±1.25V to ±5.5VInput Voltage Range Includes Negative SupplyInternal 1.182V ±2% Bandgap Reference Adjustable Hysteresis TTL-/CMOS-Compatible Outputs12µs Propagation Delay (10mV Overdrive)No Switching Crowbar Current40mA Continuous Source CurrentAvailable in Space-Saving µMAX Package
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
__________Typical Operating Circuit19-0194; Rev 1; 2/97
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 notpin-compatible.
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
ABSOLUTE MAXIMUM RATINGSV+ to V-, V+ to GND, GND to V-................................-0.3V, +12V
Inputs
Current, IN_+, IN_-, HYST...............................................20mA
Voltage, IN_+, IN_-, HYST................(V+ + 0.3V) to (V- – 0.3V)
Outputs
Current, REF....................................................................20mA
Current, OUT_.................................................................50mA
Voltage, REF....................................(V+ + 0.3V) to (V- – 0.3V)
Voltage, OUT_ (MAX931/934).....(V+ + 0.3V) to (GND – 0.3V)
Voltage, OUT_(MAX932/933)..........(V+ + 0.3V) to (V- – 0.3V)
OUT_ Short-Circuit Duration (V+ ≤5.5V)...............Continuous
Continuous Power Dissipation (TA= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)...727mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin µMAX (derate 4.1mW/°C above +70°C).............330mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW
16-Pin SO (derate 8.70mW/°C above +70°C)................696mW
Operating Temperature Ranges:
MAX93_C_ _.......................................................0°C to +70°C
MAX93_E_ _.....................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
ELECTRICAL CHARACTERISTICS—5V Operation(V+ = 5V, V- = GND = 0V, TA= TMINto TMAX, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
ELECTRICAL CHARACTERISTICS—5V Operation (continued)(V+ = 5V, V- = GND = 0V, TA= TMINto TMAX, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS—3V Operation(V+ = 3V, V- = GND = 0V, TA= TMINto TMAX, unless otherwise noted.)
Note 1:MAX934 comparators work below 2.5V, see Low-Voltage Operationsection for more details.
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
ELECTRICAL CHARACTERISTICS—3V Operation (continued)(V+ = 3V, V- = GND = 0V, TA= TMINto TMAX, unless otherwise noted.)
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% ReferenceREFERENCE VOLTAGE
vs. TEMPERATURE
MAX921/924-TOC4
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)100
MAX931
SUPPLY CURRENT vs. TEMPERATURE
MAX921/924-TOC5
TEMPERATURE (°C)
SUPPLY CURRENT (
MAX932
SUPPLY CURRENT vs. TEMPERATURE
MAX921/924-TOC6
TEMPERATURE (°C)
SUPPLY CURRENT (
MAX933
SUPPLY CURRENT vs. TEMPERATURE
MAX921/924-TOC7
TEMPERATURE (°C)
SUPPLY CURRENT (
MAX934
SUPPLY CURRENT vs. TEMPERATURE
MAX921/924-TOC8
TEMPERATURE (°C)
SUPPLY CURRENT (
MAX934
SUPPLY CURRENT vs.
LOW SUPPLY VOLTAGES
MAX921/924-TOC9
SINGLE-SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
__________________________________________Typical Operating Characteristics
(V+ = 5V, V- = GND, TA = +25°C, unless otherwise noted.)
OUTPUT VOLTAGE LOW
vs. LOAD CURRENT
MAX921/4-TOC1
LOAD CURRENT (mA)
(V)
OUTPUT VOLTAGE HIGH vs.
LOAD CURRENT
MAX921/924-TOC2
LOAD CURRENT (mA)
(V)40
REFERENCE OUTPUT VOLTAGE vs.
OUTPUT LOAD CURRENT
MAX921/924-TOC3
OUTPUT LOAD CURRENT (μA)
REFERENCE OUTPUT VOLTAGE (V)20
1.170
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
____________________________Typical Operating Characteristics (continued)(V+ = 5V, V- = GND, TA = +25°C, unless otherwise noted.)21018
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVESMAX921/924-TOC13
RESPONSE TIME (μs)
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (mV)21018
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVESMAX921/924-TOC14
RESPONSE TIME (μs)
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (mV)
MAX934 RESPONSE TIME
AT LOW SUPPLY VOLTAGES
MAX921/924-TOC15
SINGLE-SUPPLY VOLTAGE (V)
RESPONSE TIME (ms)
MAX934 OUTPUT DRIVE
AT LOW SUPPLY VOLTAGES
MAX921/924-TOC16
SINGLE-SUPPLY VOLTAGE (V)
CURRENT (mA)
SHORT-CIRCUIT SOURCE CURRENT
vs. SUPPLY VOLTAGE
160MAX121/124-TOC17
TOTAL SUPPLY VOLTAGE (V)
SOURCE CURRENT (mA)
SHORT-CIRCUIT SINK CURRENT
vs. SUPPLY VOLTAGE
MAX121/124-TOC18
TOTAL SUPPLY VOLTAGE (V)
SINK CURRENT (mA)
HYSTERESIS CONTROL
MAX921/924 TOC10
VREF -VHYST (mV)
IN+ – IN- (V)40
TRANSFER FUNCTION
4.0MAX921/924-TOC11
IN+ INPUT VOLTAGE (mV)
OUTPUT VOLTAGE (V)
RESPONSE TIME vs.
LOAD CAPACITANCE
MAX921/924 TOC12
LOAD CAPACITANCE (nF)
RESPONSE TIME (80
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
____________________________________________________________Pin Descriptions
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
_______________Detailed DescriptionThe MAX931-MAX934 comprise various combinations
of a micropower 1.182V reference and a micropower
comparator. The Typical Operating Circuitshows the
MAX931 configuration, and Figures 1a-1c show the
MAX932/MAX933/MAX934 configurations.
Each comparator continuously sources up to 40mA, and
the unique output stage eliminates crowbar glitches
during output transitions. This makes them immune to
parasitic feedback (which can cause instability) and
provides excellent performance, even when circuit-
board layout is not optimal.
Internal hysteresis in the MAX931/MAX932/MAX933
provides the easiest method for implementing
hysteresis. It also produces faster hysteresis action
and consumes much less current than circuits using
external positive feedback.
Power-Supply and Input Signal RangesThis family of devices operates from a single +2.5V to
+11V power supply. The MAX931 and MAX934 have
a separate ground for the output driver, allowing
operation with dual supplies ranging from ±1.25V to
±5.5V. Connect V- to GND when operating the
MAX931 and the MAX934 from a single supply. The
maximum supply voltage in this case is still 11V.
For proper comparator operation, the input signal can
be driven from the negative supply (V-) to within one
volt of the positive supply (V+ - 1V). The guaranteed
common-mode input voltage range extends from
V- to (V+ - 1.3V). The inputs can be taken above and
below the supply rails by up to 300mV without damage.
Operating the MAX931 and MAX934 at ±5V provides
TTL/CMOS compatibility when monitoring bipolar input
signals. TTL compatibility for the MAX932 and MAX933
is achieved by operation from a single +5V supply.
Low-Voltage Operation: V+ = 1V
(MAX934 Only)The guaranteed minimum operating voltage is 2.5V (or
±1.25V). As the total supply voltage is reduced below
2.5V, the performance degrades and the supply
Figure 1a.MAX932 Functional Diagram
Figure 1b.MAX933 Functional Diagram
