19-1226; Rev 3; 2/07
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
____________________________Features
The MAX965–MAX970 single/dual/quad micropower
comparators feature rail-to-rail inputs and outputs, and
fully specified single-supply operation down to +1.6V.
These devices draw less than 5µA per comparator and
have open-drain outputs that can be pulled beyond VCC
to 6V (max) above ground. In addition, their rail-to-rail
input common-mode voltage range makes these comparators suitable for ultra-low-voltage operation.
A +1.6V to +5.5V single-supply operating voltage range
makes the MAX965 family of comparators ideal for 2-cell
battery-powered applications. The MAX965/MAX967/
MAX968/MAX969 offer programmable hysteresis and
an internal 1.235V ±1.5% reference. All devices are
available in either space-saving 8-pin µMAX® or 16-pin
QSOP packages.
♦ Ultra-Low Single-Supply Operation down to +1.6V
♦ Rail-to-Rail Common-Mode Input Voltage Range
♦ 3µA Quiescent Supply Current per Comparator
♦ Open-Drain Outputs Swing Beyond VCC
♦ 1.235V ±1.5% Precision Internal Reference
(MAX965/967/968/969)
♦ 10µs Propagation Delay (50mV overdrive)
♦ Available in Space-Saving Packages:
8-Pin µMAX (MAX965–MAX968)
16-Pin QSOP (MAX969/MAX970)
Ordering Information
________________________Applications
2-Cell Battery-Powered/Portable Systems
Window Comparators
Threshold Detectors/Discriminators
Mobile Communications
Voltage-Level Translation
Ground/Supply-Sensing Applications
PART
PINPACKAGE
TEMP RANGE
PKG
CODE
-40°C to +85°C
8 SO
S8-2
MAX965EUA-T
-40°C to +85°C
8 µMAX-8
U8-1
MAX966ESA
-40°C to +85°C
8 SO
S8-2
MAX966EUA-T
-40°C to +85°C
8 µMAX-8
U8-1
MAX967ESA
-40°C to +85°C
8 SO
S8-2
MAX967EUA-T
-40°C to +85°C
8 µMAX-8
U8-1
MAX965ESA
Ordering Information continued on last page.
Pin Configurations appear at end of data sheet.
PART
INTERNAL
REFERENCE
COMPARATORS
PER
PACKAGE
PROGRAMMABLE
HYSTERESIS
_____________________Selector Guide
MAX965
Yes
1
Yes
µMAX is a registered trademark of Maxim Integrated Products,
Inc.
__________Typical Operating Circuit
VIN
VCC
7
MAX966
No
2
VCC
3 IN+
RPULLUP
OUT
No
8
VOUT
4 IN-
MAX967
Yes
2
Yes
MAX968
Yes
2
Yes
5 HYST
6 REF
MAX965
1.235V
MAX969
Yes
4
GND
Yes
1
MAX970
No
4
No
________________________________________________________________ Maxim Integrated Products
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX965–MAX970
General Description
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC) ............................................................+6V
Voltages
IN_-, IN_+, REF, HYST ..........................-0.3V to (VCC + 0.3V)
OUT_ ...............................................................-0.3V to +6.0V
Current into Input Pins ......................................................±20mA
Duration of OUT_ Short Circuit to GND or VCC ..........Continuous
Continuous Power Dissipation
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
8-Pin µMAX (derate 4.10mW/°C above +70°C) ..........330mW
14-Pin SO (derate 8.33mW/°C above +70°C).............667mW
16-Pin SO (derate 8.70mW/°C above +70°C).............696mW
16-Pin QSOP (derate 5.70mW/°C above +70°C)........457mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(VCC = +1.6V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3V and TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLIES
Supply Voltage Range
VCC
All packages, TA = 0°C to +85°C
1.6
5.5
SO/QSOP packages, TA = -40°C to +85°C
1.7
5.5
µMAX package, TA = -40°C to +85°C
1.8
5.5
Comparator Minimum
Operating Voltage
Supply Current
1.0
ICC
Power-Up Time
(VCC to output valid)
V
V
MAX965
7.0
12
MAX966
6.0
10
MAX967/MAX968
10
16
MAX969
14
22
MAX970
11
18
VCC stepped 0V to 5V
20
1.7V ≤ VCC ≤ 5.5V
0.1
µA
µs
COMPARATOR
Power-Supply Rejection Ratio
PSRR
Common-Mode Voltage Range
VCMR
Input Offset Voltage
VOS
TA = +25°C
TA = -40°C to +85°C
SO package
Common-mode
QSOP
package
range = -0.25V
to 1.3V,
0°C to +85°C
µMAX
VCC > 1.8V
package -40°C to +85°C
Input Bias Current
VHYST
IB
VCC
VCC - 0.25
3.0
6.0
7.0
mV
10.0
0°C to +85°C
10.0
-40°C to +85°C
15.0
HYST = REF
V
V
4.0
QSOP package
µMAX
package
mV/V
4.0
SO package
Full commonmode range
Input Hysteresis
-0.25
-0.25
1.0
±1
mV
Common-mode range = -0.25V to (VCC - 0.25V)
0.001
±5
Full common-mode range, TA = +25°C
0.001
±50
nA
Input Offset Current
IOS
0.2
pA
Input Capacitance
CIN
7.0
pF
2
_______________________________________________________________________________________
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
MAX965–MAX970
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +1.6V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3V and TA = +25°C.)
PARAMETER
SYMBOL
Common-Mode Rejection Ratio
CMRR
CONDITIONS
MIN
TYP
MAX
UNITS
1.5
4.0
mV/V
VREF
V
VREF 0.05
HYST Input Voltage Range
HYST Input Leakage
IHYST
±10
Hysteresis Gain
Input Voltage Noise
en
OUT Output Voltage Low
f = 100Hz to 100kHz, CREF = 1000pF
VOL
OUT Output Leakage Current
ILEAK
10
µVRMS
0.2
IOUT = 500µA, 2.7V < VCC < 5.5V
0.4
1
VCC = 1.6V, VOUT = 1.6V
20
50mV overdrive
10
RPULLUP = 1MΩ,
CLOAD = 15pF, high to low
Reference Voltage
VREF
SO package
QSOP package
µMAX package, TA = 0°C to +85°C
µMAX package, TA = -40°C to +85°C
Source Current
IREF+
HYST = REF
Sink Current
IREF-
V
100
10mV overdrive
tPD-
Propagation Delay
V/V
IOUT = 100µA, 1.6V < VCC < 2.7V
VCC = 5.5V, VOUT = 5.5V
nA
1.0
nA
µs
REFERENCE
Output Voltage Noise
1.125
1.205
1.205
1.185
1.235
1.235
1.235
1.235
1.255
1.265
1.265
1.285
V
15
50
200
400
nA
10
µVRMS
f = 100Hz to 100kHz, CREF = 0.1µF
µA
__________________________________________Typical Operating Characteristics
(VCC = +3.0V, RPULLUP = 100kΩ, VCM = 0V, TA = +25°C, unless otherwise noted.)
MAX966 SUPPLY CURRENT
vs. TEMPERATURE
9
8
VCC = 3.0V
7
6
5
-40
-20
0
7.0
VCC = 5.0V
6.5
6.0
VCC = 3.0V
5.5
20
40
TEMPERATURE (°C)
60
80
13
12
VCC = 5.0V
11
10
VCC = 3.0V
9
8
VCC = 2.0V
6
VIN+ > VIN-
4.0
100
14
7
VCC = 2.0V
4.5
VIN+ > VIN-
3
-60
7.5
5.0
VCC = 2.0V
4
8.0
SUPPLY CURRENT (µA)
VCC = 5.0V
10
8.5
SUPPLY CURRENT (µA)
11
15
MAX965-TOC2b
12
SUPPLY CURRENT (µA)
9.0
MAX965-TOC1b
13
MAX967/MAX968 SUPPLY CURRENT
vs. TEMPERATURE
MAX965-TOC3b
MAX965 SUPPLY CURRENT
vs. TEMPERATURE
VIN+ > VIN-
5
-60
-40
-20
0
20
40
TEMPERATURE (°C)
60
80
100
-60
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
_______________________________________________________________________________________
3
_____________________________Typical Operating Characteristics (continued)
(VCC = +3.0V, RPULLUP = 100kΩ, VCM = 0V, TA = +25°C, unless otherwise noted.)
MAX969 SUPPLY CURRENT
vs. TEMPERATURE
14
VCC = 3.0V
VCC = 5.0V
12
11
VCC = 3.0V
10
VCC = 2.0V
9
10
VCC = 2.0V
8
VIN+ > VIN-
8
VIN+ > VIN-
2.0
1.5
1.0
0.5
VIN+ > VIN0
0
20
40
60
80
100
-60
-40
-20
MAX965/70-TOC7a
14
12
10
8
6
4
2
VIN+ > VIN-
OUTPUT SHORT-CIRCUIT SINK CURRENT (mA)
MAX965 SUPPLY CURRENT
vs. SUPPLY VOLTAGE
(INCLUDES REFERENCE CURRENT)
0
20
40
60
80
1
2
3
4
5
4
5
COMPARATOR OUTPUT
LOW VOLTAGE vs. SINK CURRENT
14
VIN+ < VIN-
12
VCC = 5V
10
8
6
VCC = 3V
4
5.0
VIN+ = < VIN-
4.5
4.0
3.5
3.0
2.5
VCC = 2V VCC = 3V
2.0
1.5
VCC = 5V
0.5
0
-60
-40
-20
0
20
40
60
80
0
100
2
4
6
8
10
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
SINK CURRENT (mA)
PROPAGATION DELAY (tPD-)
vs. TEMPERATURE
PROPAGATION DELAY (tPD-)
vs. CAPACITIVE LOAD
PROPAGATION DELAY (tPD-)
vs. INPUT OVERDRIVE
VCC = 2.0V
VOD = 50mV
30
60
25
50
VCC = 3.0V
VCC = 5.0V
8
7
20
DELAY (µs)
10
DELAY (µs)
11
12
MAX965-TOC12a
12
70
MAX965-TOC10a
13
6
1.0
VCC = 2V
2
6
14
9
3
COMPARATOR OUTPUT SHORT-CIRCUIT
SINK CURRENT vs. TEMPERATURE
MAX4108/9-11a
0
2
SUPPLY VOLTAGE (V)
0
0
1
0
100
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE (V)
-20
MAX965/70 -TOC8a
-40
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
2.5
7
-60
VCC = 2.0V
40
30
VCC = 3.0V
15
VCC = 2.0V
VCC = 3.0V
10
20
6
VOD = 50mV
4
VCC = 5.0V
0
0
-60
-40
-20
0
20
40
TEMPERATURE (°C)
60
80
100
VCC = 5.0V
5
10
5
4
3.0
MAX965/70-09a
VCC = 5.0V
14
13
MAX965-TOC6b
15
3.5
SUPPLY CURRENT PER COMPARATOR (µA)
16
MAX965-TOC5b
MAX965-TOC4b
16
SUPPLY CURRENT (µA)
SUPPLY CURRENT (µA)
18
12
SUPPLY CURRENT PER COMPARATOR
vs. SUPPLY VOLTAGE
(EXCLUDES REFERENCE CURRENT)
MAX970 SUPPLY CURRENT
vs. TEMPERATURE
20
DELAY (µs)
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
0.001
0.01
CAPACITIVE LOAD (µF)
0.1
0
20
40
60
80 100
120 140 160
INPUT OVERDRIVE (mV)
_______________________________________________________________________________________
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
MAX965–MAX970
_____________________________Typical Operating Characteristics (continued)
(VCC = +3.0V, RPULLUP = 100kΩ, VCM = 0V, TA = +25°C, unless otherwise noted.)
3.4
3.2
VCC = 5.5V
2.8
2.6
VCC = 1.6V
190
180
170
160
150
140
130
2.0
1.5
1.0
100
-60
-40
-20
60
80
-40
100
25
20
VCC = 5V
1.2340
1.2330
15
10
VCC = 2V
1.2325
VCC = 5.0V
VHYST = 22mV (PROGRAMMED)
1.2320
-40
-20
MAX965/70-TOC18a
1.2
100
1.235
1.233
1.231
1.229
1.227
0
20
40
60
80
100
1.0
1.8
2.6
3.4
4.2
5.0
5.8
VCC (V)
PROPAGATION DELAY (tPD-)
MAX965/70-TOC15
1.3
80
1.237
PROPAGATION DELAY (tPD+)
1.4
60
1.239
TEMPERATURE (°C)
COMMON-MODE VOLTAGE (V)
REFERENCE VOLTAGE
vs. SOURCE CURRENT
40
1.223
-60
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
20
1.225
VCC = 3V
0
0
0
REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
1.2335
5
-20
TEMPERATURE (°C)
1.2345
REFERENCE VOLTAGE (V)
30
40
REFERENCE VOLTAGE
vs. TEMPERATURE
MAX965/70 TOC16
35
20
TEMPERATURE (°C)
PROGRAMMED HYSTERESIS
vs. COMMON-MODE VOLTAGE
40
0
REFERENCE VOLTAGE (V)
10
MAX965/70 TOC6a
1
VCC = 3.0V
0
100
0.1
OUTPUT TRANSITION FREQUENCY (kHz)
PROGRAMMED HYSTERESIS (mV)
2.5
0.5
110
2.0
REFERENCE VOLTAGE (V)
3.0
120
2.2
0.01
VCC = 5.0V
3.5
MAX965/70-TOC13
2.4
4.0
MAX965/70-TOC14a
3.6
200
INPUT BIAS CURRENT (pA)
MAX965/70 TOC13A
3.8
INPUT OFFSET VOLTAGE (µV)
SUPPLY CURRENT PER COMPARATOR (µA)
4.0
3.0
INPUT BIAS CURRENT
vs. TEMPERATURE
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MAX965/70-TOC15a
SUPPLY CURRENT PER COMPARATOR
vs. OUTPUT TRANSITION FREQUENCY
MAX965/70-TOC16b
VCC = 3V
VCC = 3V
IN+
50mV/div
IN+
50mV/div
1.1
1.0
0.9
0.8
OUT
2V/div
OUT
2V/div
0.7
0.6
0
100
200
300
400
500
600
700
2µs/div
2µs/div
SOURCE CURRENT (µA)
_______________________________________________________________________________________
5
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
_____________________________Typical Operating Characteristics (continued)
(VCC = +3.0V, RPULLUP = 100kΩ, VCM = 0V, TA = +25°C, unless otherwise noted.)
10kHz RESPONSE
POWER-UP/DOWN RESPONSE
MAX965/70-TOC18
MAX965/70-TOC17
IN+
50mV/div
VCC
2V/div
OUT
1V/div
OUT
2V/div
20µs/div
5µs/div
_____________________________________________________________Pin Descriptions
MAX965–MAX968
PIN
NAME
FUNCTION
MAX965
MAX966
MAX967
MAX968
—
1
1
1
OUTA
Comparator A Open-Drain Output
1
2
2
2
GND
Ground
2
—
—
—
N.C.
No Connection. Not internally connected.
3
—
—
—
IN+
Comparator Noninverting Input
—
3
3
3
INA+
4
—
—
—
IN-
—
4
—
—
INA-
Comparator A Inverting Input
—
5
—
4
INB-
Comparator B Inverting Input
—
6
4
—
INB+
Comparator B Noninverting Input
5
—
5
5
HYST
Hysteresis Input. Connect HYST to REF if not used. Input voltage range
is from VREF to (VREF - 50mV).
6
—
6
6
REF
Internal Reference Output. Typically 1.235V with respect to GND.
7
7
7
7
VCC
Positive Supply Voltage, +1.6V to +5.5V
8
—
—
—
OUT
Comparator Open-Drain Output
—
8
8
8
OUTB
6
Comparator A Noninverting Input
Comparator Inverting Input
Comparator B Open-Drain Output
_______________________________________________________________________________________
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
PIN
MAX970
NAME
FUNCTION
MAX969
SO
QSOP
1
1
1
OUTB
Comparator B Open-Drain Output
2
2
2
OUTA
Comparator A Open-Drain Output
3
3
3
VCC
Positive Supply Voltage, +1.6V to +5.5V
4
4
4
INA-
Comparator A Inverting Input
5
5
5
INA+
Comparator A Noninverting Input
6
6
6
INB-
Comparator B Inverting Input
7
7
7
INB+
Comparator B Noninverting Input
—
—
8, 9
N.C.
No Connection. Not internally connected.
8
—
—
REF
Internal Reference Output. Typically 1.235V with respect to GND.
9
—
—
HYST
Hysteresis Input. Connect to REF if not used. Input voltage range is
from (VREF - 50mV) to VREF.
10
8
10
INC-
Comparator C Inverting Input
11
9
11
INC+
Comparator C Noninverting Input
12
10
12
IND-
Comparator D Inverting Input
13
11
13
IND+
Comparator D Noninverting Input
14
12
14
GND
Ground
15
13
15
OUTD
Comparator D Open-Drain Output
16
14
16
OUTC
Comparator C Open-Drain Output
_______________Detailed Description
The MAX965–MAX970 single/dual/quad, micropower,
ultra-low-voltage comparators feature rail-to-rail inputs
and outputs and an internal 1.235V ±1.5% bandgap
reference. These devices operate from a single +1.6V
to +5.5V supply voltage range, and consume less than
5µA supply current per comparator over the extended
temperature range. Internal hysteresis is programmable
up to ±50mV using two external resistors and the
device’s internal reference. The rail-to-rail input common-mode voltage range and the open-drain outputs
allow easy voltage-level conversion for multivoltage
systems. All inputs and outputs can tolerate a continuous short-circuit fault condition to either rail.
The MAX965 is a single comparator with adjustable
hysteresis and a reference output pin. The MAX966 is a
dual comparator without the reference and without
adjustable hysteresis. The MAX967 is a dual compara-
tor configured as a dual voltage monitor with common
hysteresis adjustment and a reference output. The dual
MAX968 is similar to the MAX967, but is configured as
a window comparator. The MAX969 is a quad comparator with a common hysteresis adjustment and a reference output pin. The MAX970 is a quad comparator
without a reference and without hysteresis adjustment.
(See Functional Diagrams and Selector Guide.)
Comparator Input
The MAX965–MAX970 have a -0.25V to VCC input common-mode range. Both comparator inputs may operate
at any differential voltage within the common-mode
voltage range, and the comparator displays the correct
output logic state.
Low-Voltage Operation: VCC Down to 1V
The minimum operating voltage is 1.6V. As the supply
voltage falls below 1.6V, performance degrades
and supply current falls. The reference does not
_______________________________________________________________________________________
7
MAX965–MAX970
________________________________________________Pin Descriptions (continued)
MAX969/MAX970
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
________________________________________________________Functional Diagrams
VCC
VCC
IN+
OUTA
OUTB
OUT
MAX966
INHYST
REF
MAX965
+
1.235V
REF
INA+
INB+
INA-
INBGND
GND
VCC
INA+
VCC
INA+
OUTA
OUTA
REF
REF
HYST
HYST
REF
REF
1.235V
1.235V
OUTB
OUTB
INB+
INBGND
GND
VCC
OUTB
MAX968
VCC
OUTC
OUTB
OUTA
OUTD
OUTA
OUTD
INA-
IND+
INA-
IND+
INA+
IND-
INA+
IND-
INB-
INC+
INB-
INC+
INB+
INC-
INB+
INC-
REF
+
1.235V
MAX969
REF
GND
8
MAX967
HYST
MAX970
GND
_______________________________________________________________________________________
OUTC
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
Figure 1 shows a typical comparator application that
monitors VCC at 1.6V. Resistor divider R1/R2 sets the
voltage trip point (VTRIP) at 1.6V. As VCC drops below
1.6V and approaches 1V, the reference voltage typically falls below the divider voltage (V+). This causes the
comparator output to change state. If OUT’s state must
be maintained under these conditions, a latching circuit
is required.
Comparator Output
The MAX965–MAX970 contain a unique slew-ratecontrolled output stage capable of rail-to-rail operation
with an external pull-up resistor. Typical comparators
consume orders of magnitude more current during
switching than during steady-state operation. With the
MAX965 family of comparators, during an output transition from high to low, the output slew rate is limited to
minimize switching current.
Voltage Reference
With VCC greater than 1.6V but less than 5.5V, the internal 1.235V bandgap reference is ±1.5% accurate over
the commercial temperature range and ±2.5% accurate over the extended temperature range. The REF
output is typically capable of sourcing 50µA. To reduce
reference noise or to provide noise immunity, bypass
REF with a capacitor (0.1nF to 0.1µF).
Noise Considerations
The comparator has an effective wideband peak-topeak noise of around 10µV. The voltage reference has
peak-to-peak noise approaching 1.0mV with a 0.1µF
bypass capacitor. Thus, when a comparator is used
with the reference, the combined peak-to-peak noise is
about 1.0mV. This, of course, is much higher than the
individual components’ RMS noise. Avoid capacitive
coupling from any output to the reference pin. Crosstalk
can significantly increase the references’ actual noise.
__________Applications Information
Hysteresis
Many comparators oscillate in the linear region of operation because of noise or undesired parasitic feedback. This tends to occur when the voltage on one
input is equal or very close to the voltage on the other
input. The MAX965–MAX970 have internal hysteresis to
counter parasitic effects and noise. In addition, with the
use of external resistor, the MAX965/MAX967/
MAX968/MAX969’s hysteresis can be programmed to
as much as ±50mV (see the section Adding Hysteresis
to the MAX965/MAX967/MAX968/MAX969).
The hysteresis in a comparator creates two trip points:
one for the rising input voltage and one for the falling
input voltage (Figure 2). The difference between the trip
points is the hysteresis. When the comparator’s input
voltages are equal, the hysteresis effectively causes
one comparator input voltage to move quickly past the
other, thus taking the input out of the region where
oscillation occurs.
VCC
1.6V
VCC
THRESHOLDS
IN+
V+
1.0V
VREF
R1
47kΩ
t
100kΩ
INVREF - VHYST
HYSTERESIS
VHB
BAND
V+
R2
150kΩ
VCC
OUT
GND
REF
MAX965
Figure 1. Operation below 1.6V
VTRIP = 1.22 R1 + 1
R2
V
R1 = TRIP - 1 x R2
1.22
OUT
Figure 2. Threshold Hysteresis Band
_______________________________________________________________________________________
9
MAX965–MAX970
function below about 1.5V, although the comparators
typically continue to operate with a supply voltage as
low as 1V. At low supply voltages (
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