General Description
The MAX900MAX903 high-speed, low-power, single/
dual/quad voltage comparators feature differential ana-
log inputs and TTL-logic outputs with active internal pull-
ups. Fast propagation delay (8ns typ at 5mV overdrive)
makes the MAX900MAX903 ideal for fast A/D convert-
ers and sampling circuits, line receivers, V/F converters,
and many other data-discrimination applications.
All comparators can be powered from separate analog
and digital power supplies or from a single combined sup-
ply voltage. The analog input common-mode range
includes the negative rail, allowing ground sensing when
powered from a single supply. The MAX900MAX903
consume 18mW per comparator when powered from +5V.
The MAX900MAX903 are equipped with independent
TTL-compatible latch inputs. The comparator output
states are held when the latch inputs are driven low. The
MAX901 provides the same performance as the
MAX900/MAX902/MAX903 with the exception of the
latches.
For newer, pin-for-pin compatible parts with the same
speed and only half the power dissipation, see the
MAX9201/MAX9202/MAX9203 data sheet.
Applications
Features
o 8ns (typ) Propagation Delay
o 18mW/Comparator Power Consumption (+5V, typ)
o Separate Analog and Digital Supplies
o Flexible Analog Supply: +5V to +10V or 5V
o Input Range Includes Negative Supply Rail
o TTL-Compatible Outputs
o TTL-Compatible Latch Inputs (Except MAX901)
MAX900MAX903
High-Speed, Low-Power Voltage Comparators
________________________________________________________________ Maxim Integrated Products
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
IN- (A)
IN- (D)
IN+ (D)
V
CC
**
OUT (D)
OUT (C)
V
DD
**
IN+ (C)
IN- (C)
TOP VIEW
MAX901
DIP/SO
IN+ (A)
GND
V
EE
*
OUT (A)
OUT (B)
IN+ (B)
IN- (B)
A
D
B
C
14
13
12
11
10
9
8
1
2
3
4
5
6
7
V
CC
**
N.C.
OUT (B)
LATCH (B)
LATCH (A)
GND
IN+ (A)
IN- (A)
MAX902
V
DD
***
IN+ (B)
IN- (B)
V
EE
*
N.C.
OUT (A)
DIP/SO
GND
LATCH
V
EE
*
1
2
8
7
V
DD
***
OUT
IN+
IN-
V
CC
**
DIP/SO
3
4
6
5
MAX903
A
B
*ANALOG V- AND SUBSTRATE
**ANALOG V+
***DIGITAL V+
PART
TEMP RANGE
PIN-PACKAGE
MAX900ACPP
0C to +70C
20 Plastic DIP
MAX900BCPP
0C to +70C
20 Plastic DIP
MAX900ACWP
0C to +70C
20 Wide SO
MAX900BCWP
0C to +70C
20 Wide SO
MAX900AEPP
-40C to +85C
20 Plastic DIP
MAX900BEPP
-40C to +85C
20 Plastic DIP
MAX900AEWP
-40C to +85C
20 Wide SO
MAX900BEWP
-40C to +85C
20 Wide SO
MAX901ACPE
0C to +70C
16 Plastic DIP
MAX901BCPE
0C to +70C
16 Plastic DIP
Pin Configurations
Ordering Information
19-2887; Rev. 4; 7/01
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.
Ordering Information continued at end of data sheet.
Pin Configurations continued at end of data sheet.
High-Speed A/D
Converters
High-Speed V/F
Converters
Line Receivers
Threshold Detectors
Input Trigger Circuitry
High-Speed Data
Sampling
PWM Circuits
MAX900MAX903
High-Speed, Low-Power Voltage Comparators
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, V
EE
= -5V, V
DD
= +5V, LE1LE4 = logic high, T
A
= +25C, 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.
Analog Supply Voltage (V
CC
to V
EE
) ...................................+12V
Digital Supply Voltage (V
DD
to GND) ....................................+7V
Differential Input Voltage..................(V
EE
- 0.2V) to (V
CC
+ 0.2V)
Common-Mode Input Voltage..........(V
EE
- 0.2V) to (V
CC
+ 0.2V)
Latch-Input Voltage (MAX900/MAX902/
MAX903 only) .........................................-0.2V to (V
DD
+ 0.2V)
Output Short-Circuit Duration
To GND.......................................................................Indefinite
To V
DD
...............................................................................1min
Internal Power Dissipation................................................500mW
Derate above +100C ................................................10mW/C
Operating Temperature Ranges:
MAX900MAX903_C_ _ .......................................0C to +70C
MAX900MAX903_E_ _ ....................................-40C to +85C
Junction Temperature........................................-65C to +160C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
MAX900A/MAX901A
MAX900B/MAX901B/
MAX902/MAX903
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Input Offset Voltage
V
OS
V
CM
= 0
V
O
= 1.4V
0.5
2.0
1.0
4.0
mV
Input Bias Current
I
B
I
IN
+ or I
IN
-
3
6
4
10
A
Input Offset Current
I
OS
V
CM
= 0;
V
O
= 1.4V
50
250
100
500
nA
Input Voltage Range
V
CM
(Note 1)
V
EE
- 0.1
V
CC
-
2.25
V
EE
- 0.1
V
CC
-
2.25
V
Common-Mode Rejection
Ratio
CMRR
-5V < V
CM
<
+2.75V,
V
O
= 1.4V
(Note 2)
50
150
75
250
V/V
Power-Supply Rejection
Ratio
PSRR
(Note 2)
50
150
100
250
V/V
Output High Voltage
V
OH
V
IN
> 250mV,
I
SRC
= 1mA
2.4
3.5
2.4
3.5
V
Output Low Voltage
V
OL
V
IN
> 250mV,
I
SINK
= 8mA
0.3
0.4
0.3
0.4
V
Latch-Input Voltage High
V
LH
(Note 3)
1.4
2.0
1.4
2.0
V
Latch-Input Voltage Low
V
LL
(Note 3)
0.8
1.4
0.8
1.4
V
Latch-Input Current High
I
LH
V
LH
= 3.0V
(Note 3)
1
20
1
20
A
Latch-Input Current Low
I
LL
V
LL
= 0.3V
(Note 3)
1
20
1
20
A
MAX900MAX903
High-Speed, Low-Power Voltage Comparators
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V, V
EE
= -5V, V
DD
= +5V, LE1LE4 = logic high, T
A
= +25C, unless otherwise noted.)
M AX900A/M AX901A
M AX900B/M AX901B
MAX902
MAX903
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Positive Analog
Supply Current
I
CC
(Note 7)
10
15
5
8
2.5
4
mA
Negative Analog
Supply Current
I
EE
(Note 7)
7
12
3.5
6
2
3
mA
Digital Supply
Current
I
DD
(Note 7)
4
6
2
3
1
1.5
mA
Power
Dissipation
PD
V
CC
= V
DD
=
+5V, V
EE
= 0
70
105
35
55
18
28
mW
TIMING CHARACTERISTICS
(V
CC
= +5V, V
EE
= -5V, V
DD
= +5V, LE1LE4 = logic high, T
A
= +25C, unless otherwise noted.)
MAX900A/MAX901A
MAX900B/MAX901B
MAX902
MAX903
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Input-to-Output High
Response Time
t
pd+
V
OD
= 5mV,
C
L
= 15pF,
I
O
= 2mA
(Note 4)
8
10
8
10
8
10
ns
Input-to-Output Low
Response Time
t
pd
-
V
OD
= 5mV,
C
L
= 15pF,
I
O
= 2mA
(Note 4)
8
10
8
10
8
10
ns
Difference in
Response Time
Between Outputs
t
pd
(Notes 4, 5)
0.5
2.0
0.5
2.0
0.5
2.0
ns
Latch Disable to
Output High Delay
t
pd+ (D)
(Notes 3, 6)
10
10
10
ns
Latch Disable to
Output Low Delay
t
pd- (D)
(Notes 3, 6)
12
12
12
ns
Minimum Setup Time
t
s
(Notes 3, 6)
2
2
2
ns
Minimum Hold Time
t
h
(Notes 3, 6)
1
1
1
ns
Minimum Latch
Disable Pulse Width
t
pw (D)
(Notes 3, 6)
10
10
10
ns
MAX900MAX903
High-Speed, Low-Power Voltage Comparators
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, V
EE
= -5V, V
DD
= +5V, LE1LE4 = logic high, T
A
= full operating temperature, unless otherwise noted.)
MAX900A/MAX901A
MAX900B/MAX901B/
MAX902/MAX903
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Input Offset Voltage
V
OS
V
CM
= 0,
V
O
= 1.4V
1
3
2
6
mV
Input Bias Current
I
B
I
IN+
or I
IN-
4
10
6
15
A
Input Offset Current
I
OS
V
CM
= 0,
V
O
= 1.4V
100
500
200
800
nA
Input Voltage Range
V
CM
(Note 1)
V
EE
-
0.1
V
CC
-
2.25
V
EE
-
0.1
V
CC
-
2.25
V
Common-Mode
Rejection Ratio
CMRR
-5V < V
CM
<
+2.75V,
V
O
= 1.4V
(Note 2)
80
250
120
500
V/V
Power-Supply
Rejection Ratio
PSRR
(Note 2)
100
250
150
500
V/V
Output High Voltage
V
OH
V
IN
> 250mV,
I
SRC
= 1mA
2.4
3.5
2.4
3.5
V
Output Low Voltage
V
OL
V
IN
> 250mV,
I
SINK
= 8mA
0.3
0.4
0.3
0.4
V
Latch Input Voltage
High
V
LH
(Note 7)
1.4
2.0
1.4
2.0
V
Latch Input Voltage
Low
V
LL
(Note 7)
0.8
1.4
0.8
1.4
V
Latch Input Current
High
I
LH
V
LH
= 3.0V
(Note 7)
2
20
1
20
A
Latch Input Current
Low
I
LL
V
LL
= 0.3V
(Note 7)
2
20
1
20
A
MAX900MAX903
High-Speed, Low-Power Voltage Comparators
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V, V
EE
= -5V, V
DD
= +5V, LE1LE4 = logic high, T
A
= full operating temperature, unless otherwise noted.)
MAX900A/MAX901A/
MAX900B/MAX901B
MAX902
MAX903
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Positive Analog
Supply Current
I
CC
(Note 7)
10
25
5
12
2.5
6
mA
Negative Analog
Supply Current
I
EE
(Note 7)
7
20
3.5
10
2
5
mA
Digital Supply
Current
I
DD
(Note 7)
4
10
2
5
1
2.5
mA
Power
Dissipation
P
D
V
CC
= V
DD
=
+5V, V
EE
= 0
70
105
35
55
18
28
mW
TIMING CHARACTERISTICS
(V
CC
= +5V, V
EE
= -5V, V
DD
= +5V, LE1LE4 = logic high, T
A
= full operating temperature, unless otherwise noted.)
MAX900A/MAX901A
MAX900B/MAX901B/
MAX902/MAX903
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Input-to-Output High
Response Time
t
pd+
V
OD
= 5mV,
C
L
= 15pF,
I
O
= 2mA
(Note 4)
10
15
10
15
ns
Input-to-Output Low
Response Time
t
pd-
V
OD
= 5mV,
C
L
= 15pF,
I
O
= 2mA
(Note 4)
10
15
10
15
ns
Difference in Response
Time Between Outputs
t
pd
(Notes 4, 5)
1
3
1
3
ns
Note 1: The input common-mode voltage and input signal voltages should not be allowed to go negative by more than 0.2V below
V
EE
. The upper-end of the common-mode voltage range is typically V
CC
- 2V, but either or both inputs can go to a maximum
of V
CC
+ 0.2V without damage.
Note 2: Tested for +4.75V < V
CC
< +5.25V, and -5.25V < V
EE
< -4.75V with V
DD
= +5V, although permissible analog power-supply
range is +4.75V < V
CC
< +10.5V for single-supply operation with V
EE
grounded.
Note 3: Specification does not apply to MAX901.
Note 4: Guaranteed by design. Times are for 100mV step inputs (see Propagation Delay Characteristics in Figures 2 and 3).
Note 5: Maximum difference in propagation delay between any of the four comparators in the MAX900MAX903.
Note 6: See Timing Diagram (Figure 2). Owing to the difficult and critical nature of switching measurements involving the latch,
these parameters cannot be tested in a production environment. Typical specifications listed are taken from measurements
using a high-speed test-jig.
Note 7: I
CC
tested for +4.75V < V
CC
< +10.5V with V
EE
grounded. I
EE
tested for -5.25V < V
EE
< -4.75V with V
CC
= +5V. I
DD
tested
for +4.75V < V
DD
< +5.25V with the worst-case condition of all four comparator outputs at logic low.
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