MAX9042BEUA [MAXIM]
Micropower, Single-Supply, SOT23 Comparator + Precision Reference ICs; 微功耗，单电源， SOT23比较器+精密电压基准IC
| 型号： | MAX9042BEUA |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Micropower, Single-Supply, SOT23 Comparator + Precision Reference ICs |
| 文件： | 总12页 (文件大小：162K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1569; Rev 1; 1/00
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
General Description
Features
The MAX9040–MAX9043 and MAX9050–MAX9053 fea-
ture combinations of low-power comparators and a pre-
cision voltage reference. Their operating voltage range
makes them ideal for both +3V and +5V systems. The
MAX9040/MAX9041/MAX9050/MAX9051 have a single
comparator and reference consuming only 40µA of
supply current. The MAX9042/MAX9043/MAX9052/
MAX9053 have dual comparators and a reference,
while consuming only 55µA of supply current. Low-volt-
age operation and low supply current make these
devices ideal for battery-operated systems.
ꢀ Comparator + Precision Reference in SOT23
ꢀ +2.5V to +5.5V Single-Supply Operation
(MAX9040–MAX9043)
ꢀ Low Supply Current (MAX9042/43/52/53)
55µA Quiescent
65µA with 100kHz Switching
ꢀ 400ns Propagation Delay
ꢀ Rail-to-Rail Inputs
ꢀ Rail-to-Rail Output Stage Sinks and Sources 8mA
ꢀ Internal 3mV Hysteresis
®
The comparators feature Rail-to-Rail inputs and out-
puts, with a common-mode input voltage range that
extends 250mV beyond the supply rails. Input bias cur-
rent is typically 1.0pA, and input offset voltage is typi-
cally 0.5mV. Internal hysteresis ensures clean output
switching, even with slow-moving input signals. The
output stage features a unique design that limits supply
current surges while switching, virtually eliminating sup-
ply glitches typical of many other comparators. This
design also minimizes overall power consumption
under dynamic conditions. The comparator outputs
have rail-to-rail push-pull output stages that sink and
source up to 8mA. The propagation delay is 400ns,
even with the low operating supply current.
ꢀ Voltage Reference Offers
0.4% max Initial Accuracy (MAX90_ _A)
6ppm/°C typ Temperature Coefficient
Stable for 0 to 4.7nF Capacitive Loads
Ordering Information
PIN-
PACKAGE
TOP
MARK
PART
TEMP. RANGE
MAX9040AEUK-T -40°C to +85°C
MAX9040BEUK-T -40°C to +85°C
MAX9041AEUT-T* -40°C to +85°C
MAX9041BEUT-T* -40°C to +85°C
MAX9041AESA* -40°C to +85°C
MAX9041BESA* -40°C to +85°C
5 SOT23-5
5 SOT23-5
6 SOT23-6
6 SOT23-6
8 SO
ADNV
ADNX
AAHF
AAHH
—
The reference output voltage is set to 2.048V in the
MAX9040–MAX9043 and to 2.500V in the MAX9050–
MAX9053. These devices are offered in two grades: an
A grade with 0.4% initial accuracy and 6ppm/°C
tempco, and a B grade with 1% initial accuracy and
100ppm/°C tempco. The voltage reference features a
proprietary curvature-correction circuit and laser-
trimmed thin-film resistors. The series-mode references
can sink or source up to 500µA of load current.
8 SO
—
MAX9042AEUA
MAX9042BEUA
MAX9042AESA
MAX9042BESA
MAX9043AEUB
MAX9043BEUB
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
8 µMAX
8 µMAX
8 SO
—
—
—
8 SO
—
10 µMAX
10 µMAX
—
—
Ordering Information continued at end of data sheet.
*Future product—contact factory for availability.
Applications
Precision Battery Management
Pin Configurations
Window Comparators
IR Receivers
TOP VIEW
OUT
1
2
3
5
4
V
CC
Level Translators
Digital Line Receivers
MAX9040
MAX9050
V
EE
Typical Operating Circuit appears at end of data sheet.
Functional Diagrams appear at end of data sheet.
Selector Guide appears at end of data sheet.
IN+
REF
SOT23-5
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
to V ) ....................................-0.3V to +6V
8-Pin µMAX (derate 4.1mW/°C above +70°C)...........330mW
10-Pin µMAX (derate 5.6mW/°C above +70°C).........444mW
8-Pin SO (derate 5.88mW/°C above +70°C)..............471mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC
EE
All Other Pins ...................................(V - 0.3V) to (V
+ 0.3V)
EE
CC
Output Short-Circuit Duration
(OUT_, REF) .............Indefinite Short Circuit to Either Supply
Continuous Power Dissipation (T = +70°C)
A
5-Pin SOT23 (derate 7.10mW/°C above +70°C)........571mW
6-Pin SOT23 (derate 8.70mW/°C above +70°C)........696mW
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—A Grade (0.4% initial accuracy)
(V
= +5V, V = 0, V
= 0, I
= 0, I
= 0, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.)
MAX A
CC
EE
CM
OUT
REF
A
MIN
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
2.5
TYP
MAX
5.5
5.5
55
UNITS
MAX9040–MAX9043
MAX9050–MAX9053
Supply Voltage Range (Note 2)
Supply Current
V
CC
V
2.7
V
CC
V
CC
V
CC
V
CC
= 2.7V
= 5.0V
= 2.7V
= 5.0V
40
45
55
60
MAX9040/MAX9041/
MAX9050/MAX9051
60
I
µA
CC
80
MAX9042/MAX9043/
MAX9052/MAX9053
85
COMPARATORS
T
= +25°C
0.5
5.0
7.0
A
Over entire common-
mode range
Input Offset Voltage (Note 3)
Input Hysteresis
V
mV
mV
nA
pA
V
OS
T = -40°C to +85°C
A
V
HYST
3.0
0.001
0.5
Input Bias Current
(Notes 4, 5, 6)
I
Specified common-mode range
Specified common-mode range
10.0
B
Input Offset Current (Note 4)
I
OS
T
A
T
A
= +25°C
V
- 0.25
V + 0.25
CC
EE
Common-Mode Voltage Range
(Notes 4, 7)
CMVR
CMRR
PSRR
= -40°C to +85°C
V
V
CC
EE
Common-Mode Rejection Ratio
(Note 4)
Specified common-mode range
52
80
dB
MAX9040–MAX9043, 2.5V ≤ V
MAX9050–MAX9053, 2.7V ≤ V
≤ 5.5V
≤ 5.5V
55
55
80
80
CC
Power-Supply Rejection Ratio
Input Capacitance (Note 4)
Output Short-Circuit Current
CC
C
2.5
95
pF
IN
V
V
= 5V
CC
I
V
OUT
= V or V
mA
SC
EE
CC
= 2.7V
35
CC
V
CC
V
CC
V
CC
V
CC
= 5V, I
= 8mA
SINK
0.2
0.15
4.85
2.55
0.55
0.4
Output Voltage Low
Output Voltage High
V
V
V
OL
= 2.7V, I
= 3.5mA
SINK
= 5V, I
= 8mA
4.45
2.3
SOURCE
V
OH
= 2.7V, I
= 3.5mA
SOURCE
2
_______________________________________________________________________________________
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
ELECTRICAL CHARACTERISTICS—A Grade (0.4% initial accuracy) (continued)
(V
= +5V, V = 0, V
= 0, I
= 0, I
= 0, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.)
MAX A
CC
EE
CM
OUT
REF
A
MIN
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
40
MAX
UNITS
C = 15pF
L
Output Rise/Fall Times
t /t
R F
C = 50pF
L
50
ns
C = 200pF
L
80
50mV overdrive
100mV overdrive
valid logic state
450
400
20
Output Propagation Delay
(Note 8)
C = 15pF,
L
t
+/t
-
ns
µs
PD PD
V
CC
= 2.7V
Power-Up Time
t
Time to V
OUT
PU
VOLTAGE REFERENCE
MAX9040–MAX9043
MAX9050–MAX9053
2.040
2.490
2.048
2.500
2.056
2.510
Output Voltage
V
REF
T
A
= +25°C
V
Output Voltage Temperature
Coefficient (Note 9)
TCV
6
30
ppm/°C
µV/V
REF
2.5V ≤ V
2.7V ≤ V
≤ 5.5V, MAX9040–MAX9043
≤ 5.5V, MAX9050–MAX9053
+50
+50
2
+200
+200
4
CC
∆V
/
REF
Line Regulation
Load Regulation
∆V
CC
CC
Sourcing: 0 ≤ I
≤ 500µA
REF
∆V
REF
∆I
REF
/
µV/µA
Sinking: -500µA ≤ I
≤ 0
3.5
4
6
REF
Output Short-Circuit Current
Thermal Hysteresis (Note 10)
Long-Term Stability
I
V
REF
= V or V
CC
mA
ppm
ppm
µVp-p
SC
EE
T
HYST
130
50
1000h at T = +25°C
A
f = 0.1Hz to 10Hz
f = 10Hz to 10kHz
40
Noise Voltage
E
OUT
105
µV
RMS
∆V
/
REF
Ripple Rejection
V
= 5V 100mV, f = 120Hz
84
dB
µs
nF
CC
∆V
CC
Turn-On Settling Time
t (V
R
)
To V = 1% of final value
REF
200
REF
Capacitive Load Stability Range
(Note 6)
C (V
L
)
REF
0
4.7
ELECTRICAL CHARACTERISTICS—B Grade (1% initial accuracy)
(V
= +5V, V = 0, V
= 0, I
= 0, I
= 0, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.)
MAX A
CC
EE
CM
OUT
REF
A
MIN
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
2.5
TYP
MAX
5.5
UNITS
MAX9040–MAX9043
MAX9050–MAX9053
Supply Voltage Range (Note 2)
Supply Current
V
CC
V
2.7
5.5
V
CC
V
CC
V
CC
V
CC
= 2.7V
= 5.0V
= 2.7V
= 5.0V
40
45
55
60
MAX9040/MAX9041/
MAX9050/MAX9051
100
130
I
µA
CC
MAX9042/MAX9043/
MAX9052/MAX9053
_______________________________________________________________________________________
3
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
ELECTRICAL CHARACTERISTICS—B Grade (1% initial accuracy) (continued)
(V
= +5V, V = 0, V
= 0, I
= 0, I
= 0, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.)
MAX A
CC
EE
CM
OUT
REF
A
MIN
(Note 1)
PARAMETER
COMPARATOR
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Offset Voltage (Note 3)
Input Hysteresis
V
Over entire common-mode range
1
9.0
mV
mV
OS
V
HYST
3.0
Input Bias Current
(Notes 4, 5, 6)
I
Specified common-mode range
Specified common-mode range
0.001
0.5
25.0
nA
pA
V
B
Input Offset Current (Note 4)
I
OS
Common-Mode Voltage Range
(Notes 4, 7)
CMVR
CMRR
PSRR
V
V
CC
EE
Common-Mode Rejection Ratio
(Note 4)
Specified common-mode range
52
80
dB
MAX9040–MAX9043, 2.5V ≤ V
MAX9050–MAX9053, 2.7V ≤ V
≤ 5.5V
≤ 5.5V
55
55
80
80
CC
Power-Supply Rejection Ratio
Input Capacitance (Note 4)
Output Short-Circuit Current
dB
pF
CC
C
2.5
95
IN
V
V
= 5V
CC
I
V
OUT
= V or V
mA
SC
EE
CC
= 2.7V
35
CC
V
V
V
V
= 5V, I
= 8mA
SINK
0.2
0.15
4.85
2.55
40
0.55
CC
CC
CC
CC
Output Voltage Low
Output Voltage High
V
V
V
OL
= 2.7V, I
= 3.5mA
SINK
= 5V, I
= 8mA
4.45
SOURCE
V
OH
= 2.7V, I
= 3.5mA
SOURCE
C = 15pF
L
Output Rise/Fall Times
t /t
R F
C = 50pF
L
50
ns
C = 200pF
L
80
50mV overdrive
100mV overdrive
450
400
20
ns
Output Propagation Delay
(Note 8)
C = 15pF,
L
t
/t
PD+ PD-
V
CC
= 2.7V
Power-Up Time
t
Time to V
valid logic state
OUT
µs
PU
VOLTAGE REFERENCE
MAX9040–MAX9043
2.028
2.475
2.048
2.500
2.068
2.525
Output Voltage
V
REF
T
A
= +25°C
V
MAX9050–MAX9053
Output Voltage Temperature
Coefficient (Note 9)
TCV
20
100
ppm/°C
µV/V
REF
MAX9040–MAX9043
MAX9050–MAX9053
+50
+50
2
+200
+200
4
∆V
/
REF
Line Regulation
Load Regulation
2.5V ≤ V
≤ 5.5V
CC
∆V
CC
Sourcing: 0 ≤ I
≤ 500µA
REF
∆V
REF
∆l
REF
/
µV/mA
Sinking: -500µA ≤ I
≤ 0
3.5
4
6
REF
Output Short-Circuit Current
Thermal Hysteresis (Note 10)
Long-Term Stability
I
V
REF
= V or V
CC
mA
SC
EE
T
HYST
130
100
ppm
ppm
1000h at T = +25°C
A
4
_______________________________________________________________________________________
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
ELECTRICAL CHARACTERISTICS—B Grade (1% initial accuracy) (continued)
(V
= +5V, V = 0, V
= 0, I
= 0, I
= 0, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.)
MAX A
CC
EE
CM
OUT
REF
A
MIN
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
40
MAX
UNITS
µVp-p
f = 0.1Hz to 10Hz
f = 10Hz to 10kHz
Noise Voltage
E
OUT
105
µVRMS
∆V
/
REF
Ripple Rejection
V
= 5V 100mV, f = 120Hz
84
dB
µs
nF
CC
∆V
CC
Turn-On Settling Time
t (V
R
To V = 1% of final value
REF
200
REF)
Capacitive Load Stability Range
(Note 6)
C (V
L
0
4.7
REF)
Note 1: All devices are 100% production tested at T = +25°C. Limits over the extended temperature range are guaranteed by
A
design, not production tested.
Note 2: Supply voltage range guaranteed by PSRR test on comparator and line regulation of REF.
Note 3:
V
OS
is defined as the center of the input-referred hysteresis band.
Note 4: For the comparators with the inverting input (IN-) uncommitted.
Note 5: Input bias current is the average of the inverting and noninverting input bias currents.
Note 6: Not production tested. Guaranteed by design.
Note 7: Guaranteed by CMRR test.
Note 8:
V
is beyond the offset and hysteresis determined trip point.
OVERDRIVE
Note 9: Temperature coefficient is measured by the box method; i.e., the maximum ∆V
is divided by the maximum ∆T.
REF
Note 10: Thermal hysteresis is defined as the change in V
at +25°C before and after cycling the device from T
to T
.
REF
MIN
MAX
Typical Operating Characteristics
(V
= +5V, V = 0, V
= 0, I
= 0, I = 0, T = +25°C, unless otherwise noted.)
REF A
CC
EE
CM
OUT
MAX9040/MAX9041/MAX9050/MAX9051
SUPPLY CURRENT vs. TEMPERATURE
MAX9042/MAX9043/MAX9052/MAX9053
SUPPLY CURRENT vs. TEMPERATURE
MAX9040/MAX9041/MAX9050/MAX9051
SUPPLY CURRENT vs. SWITCHING FREQUENCY
60
60
200
V
> V
IN-
V
> V
IN+ IN-
IN+
V
= +5.0V
V
V
= +5.0V
= +2.7V
CC
CC
CC
50
40
30
20
10
0
50
40
30
20
10
0
150
100
50
V
= +2.7V
CC
V
V
= +5.0V
= +2.7V
CC
CC
0
-40 -20
0
20
40
60
80
-40 -20
0
20
40
60
80
0.01
0.1
1
10
100
1000
TEMPERATURE (°C)
TEMPERATURE (°C)
SWITCHING FREQUENCY (kHz)
_______________________________________________________________________________________
5
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
Typical Operating Characteristics (continued)
= 0, I = 0, T = +25°C, unless otherwise noted.)
REF A
(V
= +5V, V = 0, V
= 0, I
CC
EE
CM
OUT
OUTPUT LOW VOLTAGE
vs. OUTPUT SINK CURRENT
10,000
OUTPUT HIGH VOLTAGE
vs. OUTPUT SOURCE CURRENT
MAX9042/MAX9043/MAX9052/MAX9053
SUPPLY CURRENT vs. SWITCHING FREQUENCY
10,000
1000
100
250
V
< V
IN-
V
> V
IN+
IN+
IN-
1000
100
10
200
150
100
V
= +2.7V
V
V
= +2.7V
CC
CC
= +5.0V
V
= +5.0V
CC
CC
10
V
V
= +5.0V
= +2.7V
CC
CC
1
1
50
0
0.1
0.1
0.01
0.1
1
10
0.01
0.1
1
10
0.01
0.1
1
10
100
1000
OUTPUT SINK CURRENT (mA)
OUTPUT SOURCE CURRENT (mA)
SWITCHING FREQUENCY (kHz)
OUTPUT SHORT-CIRCUIT CURRENT
vs. TEMPERATURE
OUTPUT SHORT-CIRCUIT CURRENT
vs. TEMPERATURE
PROPAGATION DELAY
vs. CAPACITIVE LOAD (V = 2.7V)
CC
120
100
80
60
40
20
0
100
600
V
> V
V
> V
IN- IN+
IN+
IN-
V
= 50mV
OD
OUT SHORTED TO V
OUT SHORTED TO V
EE
CC
80
60
40
20
0
550
500
450
400
350
V
= +5.0V
CC
t
TO V
= 50%
OUT
V
= +5.0V
PD+
CC
OF FINAL VALUE
t
TO V
= 50%
OUT
PD-
OF FINAL VALUE
t
TO V
= 10%
OUT
V
= +2.7V
V
= +2.7V
CC
PD+
CC
20
OF FINAL VALUE
t
TO V
= 10%
OUT
PD-
OF FINAL VALUE
-40
-20
0
40
60
80
-40
-20
0
20
40
60
80
0
100 200 300 400 500 600 700 800 900 1000
CAPACITIVE LOAD (pF)
TEMPERATURE (°C)
TEMPERATURE (°C)
PROPAGATION DELAY
vs. CAPACITIVE LOAD (V = 5V)
PROPAGATION DELAY
vs. TEMPERATURE
CC
= 50%
650
V
650
V
t
TO V
OUT
= 50mV
PD+
= 50mV
OD
OD
OF FINAL VALUE
600
550
500
450
400
350
300
600
t
TO V
= 50%
OUT
PD+
OF FINAL VALUE
t
TO V
= 10%
OUT
PD+
550
500
450
400
350
300
OF FINAL VALUE
t
TO V
= 10%
OUT
PD+
t
TO V
= 50%
OUT
OF FINAL VALUE
PD-
t
TO V
= 50%
OUT
PD-
OF FINAL VALUE
OF FINAL VALUE
t
TO V
= 10%
OUT
PD-
OF FINAL VALUE
t
TO V
= 10%
OUT
PD-
OF FINAL VALUE
20 40
TEMPERATURE (°C)
0
100 200 300 400 500 600 700 800 900 1000
CAPACITIVE LOAD (pF)
-40
-20
0
80
60
6
_______________________________________________________________________________________
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
Typical Operating Characteristics (continued)
(V
= +5V, V = 0, V
= 0, I
= 0, I
= 0, T = +25°C, unless otherwise noted.)
REF A
CC
EE
CM
OUT
PROPAGATION DELAY
vs. INPUT OVERDRIVE
PROPAGATION DELAY (t
)
PD+
PROPAGATION DELAY (t
)
PD-
900
800
700
600
500
400
300
200
A
A
t
, V = 5.0V
PD+ CC
t
, V = 2.7V
PD+ CC
t
, V = 5.0V
PD- CC
B
t , V = 2.7V
PD- CC
B
100ns/div
0
20 40 60 80 100 120 140 160 180 200
INPUT OVERDRIVE (mV)
100ns/div
A = IN+, 50mV/div
B = OUT, 2V/div
A = IN+, 50mV/div
B = OUT, 2V/div
SWITCHING CURRENT (OUT FALLING EDGE)
POWER-UP DELAY (OUT)
SWITCHING CURRENT (OUT RISING EDGE)
A
B
A
A
B
B
C
C
100ns/div
5µs/div
100ns/div
A = IN+, 100mV/div
A = V , 2V/div
CC
B = OUT, 1V/div
A = IN+, 100mV/div
B = OUT, 5V/div
B = OUT, 5V/div
C = I , 1mA/div
C = I , 1mA/div
CC
CC
INPUT BIAS CURRENT
vs. INPUT VOLTAGE
REFERENCE OUTPUT VOLTAGE
TEMPERATURE DRIFT
POWER-UP DELAY (REF)
1.00
0.75
0.50
0.25
0
0.003
0.002
0.001
0
V
= +2.0V
THREE TYPICAL PARTS
NORMALIZED TO +25°C
IN-
A
B
C
I
B+
I
B-
-0.25
-0.50
-0.75
-1.00
100µs/div
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
(V)
-40
-20
0
20
40
60
80
A = V , 2V/div
CC
B = REF, 1V/div
V
TEMPERATURE (°C)
IN+
C = REF, 50mV/div, 2.048V OFFSET
_______________________________________________________________________________________
7
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
Typical Operating Characteristics (continued)
(V
= +5V, V = 0, V
= 0, I
= 0, I
= 0, T = +25°C, unless otherwise noted.)
REF A
CC
EE
CM
OUT
LINE REGULATION
LOAD REGULATION
150
2000
1500
1000
500
T
= +85°C
A
100
50
T
= +25°C
A
T
= -40°C
A
0
T
T
= +25°C
A
-50
-100
-150
-200
0
= -40°C
A
-500
-1000
-1500
T
= +85°C
A
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-500
-300
-100
100
300
500
INPUT VOLTAGE (V)
LOAD CURRENT (µA)
Pin Description
PIN
MAX9040
MAX9050
MAX9041
MAX9051
MAX9042
MAX9052
MAX9043
MAX9053
NAME
FUNCTION
SOT23-5
SOT23-6
SO
6
SO/µMAX
µMAX
1
2
1
2
—
4
—
5
OUT
Comparator Output
4
V
EE
Negative Supply Voltage
3
3
3
—
2
—
2
IN+
Comparator Noninverting Input
Reference Voltage Output
Positive Supply Voltage
4
5
1
REF
5
6
7
8
10
—
9
V
CC
—
—
—
—
—
—
—
—
4
2
—
—
1
IN-
Comparator Inverting Input
No Connection. Not internally connected.
Comparator A Output
—
—
—
—
—
—
—
5, 8
—
—
—
—
—
—
N.C.
1
OUTA
INA+
INB+
INB-
3
4
Comparator A Noninverting Input
Comparator B Noninverting Input
Comparator B Inverting Input
Comparator B Output
5
6
6
7
7
8
OUTB
INA-
—
3
Comparator A Inverting Input
8
_______________________________________________________________________________________
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
age is between the supply rails. Comparator inputs are
Detailed Description
protected from overvoltage by internal body diodes
The MAX9040–MAX9043 and MAX9050–MAX9053 fea-
connected to the supply rails. As the input voltage
ture single/dual, low-power, low-voltage comparators
exceeds the supply rails, these body diodes become
and a precision voltage reference. They operate from a
forward biased and begin to conduct. Consequently,
single +2.5V to +5.5V (MAX904_) or +2.7V to +5.5V
bias currents increase exponentially as the input volt-
(MAX905_) supply. The single comparators with refer-
age exceeds the supply rails.
ence (MAX9040/MAX9041/MAX9050/MAX9051) con-
sume only 40µA of supply current, while the dual
comparators with reference (MAX9042/MAX9043/
MAX9052/MAX9053) consume only 55µA of supply cur-
rent. Their common-mode input range extends 0.25V
beyond each rail. Internal hysteresis ensures clean out-
put switching, even with slow-moving input signals.
Comparator Output Stage Circuitry
The comparators in these devices contain a unique
output stage capable of rail-to-rail operation with loads
up to 8mA. Many comparators consume orders-of-mag-
nitude more current during switching than during
steady-state operation. However, with this family of com-
parators, the supply current change during an output
transition is extremely small. The Typical Operating
Characteristics graph Supply Current vs. Switching
Frequency shows the minimal supply current increase
as the output switching frequency approaches 1MHz.
This characteristic reduces the need for power-supply
filter capacitors to reduce glitches created by compara-
tor switching currents. Another advantage realized in
high-speed, battery-powered applications is a substan-
tial increase in battery life.
The output stage employs a unique design that mini-
mizes supply current surges while switching, virtually
eliminating the supply glitches typical of many other
comparators. Large internal output drivers allow rail-to-
rail output swing that can sink and source up to 8mA of
current.
The precision reference uses a proprietary curvature-
correction circuit and laser-trimmed thin-film resistors,
resulting in a temperature coefficient of less than
30ppm/°C over the extended temperature range and
initial accuracy of 0.4% (A grade). The reference output
voltage is set to 2.048V in the MAX9040–MAX9043 and
to 2.500V in the MAX9050–MAX9053.
Applications Information
Additional Hysteresis
These comparators have 3mV internal hysteresis.
Additional hysteresis can be generated with two resis-
tors using positive feedback (Figure 1). Use the follow-
ing procedure to calculate resistor values:
Comparator Input Stage Circuitry
The devices’ input common-mode range extends from
(V - 0.25V) to (V
EE
+ 0.25V). These comparators may
CC
operate at any differential input voltage within these lim-
its. Input bias current is typically 1.0pA if the input volt-
1) Calculate the trip points of the comparator using
these formulas:
V
− V
R2
CC
REF
(
)
V
= V
+
V
TH
REF
CC
R1+ R2
R1
V
R2
CC
V
= V
1−
R2
TL
REF
IN+
IN-
R1+ R2
V
REF
OUT
V
TH
is the threshold voltage at which the comparator
switches its output from high to low as V rises
IN
V
IN
above the trip point. V is the threshold voltage at
TL
which the comparator switches its output from low to
MAX9040–9043
MAX9050–9053
high as V drops below the trip point.
IN
V
EE
2) The hysteresis band will be:
R2
V
HYS
= V - V = V
TH TL CC
R1+ R2
Figure 1. Additional Hysteresis
_______________________________________________________________________________________
9
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
Board Layout and Bypassing
Power-supply bypass capacitors are not typically need-
V
CC
ed, but would be called for in cases where supply
impedance is high, supply leads are long, or excessive
noise is expected on the supply lines. Use 100nF
bypass capacitors under these conditions. Minimize
signal trace lengths to reduce stray capacitance.
V
CC
IN+
IN-
V
IN
OUT
10k
Reference Output/Load Capacitance
The MAX904_/MAX905_ do not require an output
capacitor on REF for frequency stability. They are sta-
ble for capacitive loads up to 4.7nF. However, in appli-
cations where the load or the supply can experience
step changes, an output capacitor will reduce the
amount of overshoot (or undershoot) and assist the cir-
cuit’s transient response. When an application is not
subject to transient conditions, the REF capacitor can
be omitted.
MAX9040–9043
MAX9050–9053
0.1µF
V
EE
Figure 2. Time Averaging of the Input Signal for Data Recovery
3) In this example, let V
= +5V and V
= +2.5V.
CC
REF
Biasing for Data Recovery
Digital data is often embedded into a bandwidth- and
amplitude-limited analog path. Recovering the data can
be difficult. Figure 2 compares the input signal to a
time-averaged version of itself. This self- biases the
threshold to the average input voltage for optimal noise
margin.
R2
V
= 2.5 + 2.5
TH
R1+ R2
and
R2
R1+ R2
V
= 2.5 1−
Even severe phase distortion is eliminated from the dig-
ital output signal. Be sure to choose R1 and C1 so that
TL
4) Select R2. In this example, we will choose 1kΩ.
5) Select V . In this example, we will choose 50mV.
1
f
>>
CAR
HYS
2πR1C1
6) Solve for R1.
where f
is the fundamental carrier frequency of the
CAR
digital data stream.
R2
V
= V
HYS
CC
Chip Information
R1+ R2
MAX9040/41/50/51 TRANSISTOR COUNT: 204
MAX9042/43/52/53 TRANSISTOR COUNT: 280
1000
0.050 = 5
R1+1000
where R1 ≈ 100kΩ, V = 2.525V, and V = 2.475V.
TH
TL
10 ______________________________________________________________________________________
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
Selector Guide
COMPARATORS
PER PACKAGE
V
REF
(V)
PART
IN- CONNECTIONS
MAX9040
MAX9041
MAX9050
MAX9051
MAX9042
MAX9043
MAX9052
MAX9053
1
1
1
1
2
2
2
2
2.048
2.048
2.500
2.500
2.048
2.048
2.500
2.500
REF
Uncommitted
REF
Uncommitted
REF/Uncommitted
Uncommitted/Uncommitted
REF/Uncommitted
Uncommitted/Uncommitted
Pin Configurations (continued)
TOP VIEW
OUT
1
2
3
6
5
4
V
CC
OUTA
REF
1
2
3
4
5
10
9
V
CC
REF
IN-
1
2
3
4
8
7
6
5
N.C.
OUTA
REF
1
2
3
4
8
7
6
5
V
CC
N.C.
V
CC
OUTB
INB-
MAX9041
MAX9051
MAX9043
MAX9053
MAX9041
MAX9051
MAX9042
MAX9052
V
REF
IN-
EE
INA-
INA+
8
OUTB
INB-
INB+
IN+
OUT
N.C.
INA+
7
V
V
INB+
EE
EE
IN+
V
6
EE
µMAX
SO
µMAX/SO
SOT23-6
Ordering Information (continued)
Typical Operating Circuit
PIN-
PACKAGE
TOP
MARK
PART
TEMP. RANGE
V
CC
V
IN
MAX9050AEUK-T -40°C to +85°C
MAX9050BEUK-T -40°C to +85°C
MAX9051AEUT-T* -40°C to +85°C
MAX9051BEUT-T* -40°C to +85°C
MAX9051AESA* -40°C to +85°C
MAX9051BESA* -40°C to +85°C
5 SOT23-5
5 SOT23-5
6 SOT23-6
6 SOT23-6
8 SO
ADNW
ADNY
AAHG
AAHI
—
V
CC
0.1µF
IN+
IN-
OUT
8 SO
—
MAX9052AEUA
MAX9052BEUA
MAX9052AESA
MAX9052BESA
MAX9053AEUB
MAX9053BEUB
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
8 µMAX
8 µMAX
8 SO
—
MAX9041/9043
MAX9051/9053
REF
—
—
2.048V/2.500V
8 SO
—
V
EE
10 µMAX
10 µMAX
—
—
*Future product—contact factory for availability.
______________________________________________________________________________________ 11
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
Functional Diagrams
OUTA
V
CC
MAX9042
MAX9052
V
OUT
EE
REF
OUTB
INB-
V
CC
REF
INA+
REF
IN+
REF
V
EE
INB+
MAX9040
MAX9050
OUTA
REF
V
CC
V
OUT
EE
MAX9043
MAX9053
REF
OUTB
INB-
REF
IN-
INA-
INA+
V
CC
REF
IN+
V
EE
INB+
MAX9041
MAX9051
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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