19-0183; Rev 0; 9/93
Ultra High-Speed, High-Resolution,
Single-/Dual-Supply TTL Comparators
_______________General Description
The MAX915/MAX916 high-speed, single and dual TTL
voltage comparators eliminate oscillation by separating the
comparator input and output stages with a negative edge-
triggered master/slave flip-flop. Comparator propagation
delay is typically 6ns, and is insensitive to input overdrive.
The MAX915 and MAX916 resolve input signals as small as
2mV and 2.4mV, respectively.
These comparators operate either from dual supplies or
from a single +5V supply. The input common-mode volt-
age range extends below the negative supply rail, allowing
ground-sensing applications with a single +5V supply.
The MAX915 is a single TTL comparator, available in 8-pin
DIP and SO packages. The MAX916 is a dual version
available in 16-pin DIP and SO packages. For equivalent
devices with complementary ECL outputs and 2ns propa-
gation delay, see the single/dual MAX905/MAX906.
____________________________Features
o
Oscillation Free: Clocked Architecture
o
6ns Propagation Delay
o
Propagation Delay Insensitive to Overdrive
o
Single +5V or Dual ±5V Supplies
o
2mV Input Resolution (MAX915)
o
Input Range Includes Negative Supply Rail
o
Low Power: 14mA (70mW) per Comparator, +5V
o
1.5ns Setup Time with 5mV Overdrive
o
No Minimum Requirement for Input Signal
Slew Rate
o
Complementary TTL Outputs
MAX915/MAX916
________________________Applications
High-Speed A/D Converters
High-Speed Line Receivers
Peak Detectors
Threshold Detectors
High-Speed Triggers
Synchronous Data Discriminators
______________Ordering Information
PART
MAX915CPA
MAX915CSA
MAX915C/D
MAX915EPA
MAX915ESA
MAX915MJA
MAX916CPE
MAX916CSE
MAX916C/D
MAX916EPE
MAX916ESE
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP
16 Plastic DIP
16 Narrow SO
Dice*
16 Plastic DIP
16 Narrow SO
_________________Pin Configurations
V+
1
IN+
2
IN-
3
V-
4
8
Q
7
Q
* Contact factory for dice specifications.
MAX915
6
5
GND
CLK
________________Functional Diagram
DIP/SO
QA
1
QA
2
GND
3
CLKA
4
N.C.
5
V-
6
INA-
7
INA+
8
16
QB
15
QB
14
GND
IN+
Q
MASTER
D LATCH
D CK Q
D
Q
SLAVE
D LATCH
D CK Q
D
TTL
OUTPUT
STAGE
Q
Q
IN-
MAX916
13
CLKB
12
N.C.
11
V+
10
INB-
9
INB+
INPUT AMPLIFIER
MASTER/SLAVE FLIP-FLOP
OUTPUT STAGE
CLK
DIP/Narrow SO
________________________________________________________________
Maxim Integrated Products
1
Call toll free 1-800-998-8800 for free samples or literature.
Ultra High-Speed, High-Resolution,
Single-/Dual-Supply TTL Comparators
MAX915/MAX916
ABSOLUTE MAXIMUM RATINGS
Positive Supply Voltage (V+ to GND) ....................................+6V
Negative Supply Voltage (V- to GND).....................................-6V
Differential Input Voltage ......................(V- - 0.3V) to (V+ + 0.3V)
Common-Mode Input Voltage ..............(V- - 0.3V) to (V+ + 0.3V)
Clock Input Voltage..........................(GND - 0.3V) to (V+ + 0.3V)
Output Short-Circuit Duration
To V+, GND ............................................................Continuous
To V- ................................................................................10sec
Output Current (Q or
Q)
......................................................20mA
Continuous Power Dissipation (T
A
= +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 CERDIP (derate 8.00mW/°C above +70°C).........640mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ..696mW
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature Range ............................-65°C to +170°C
Lead Temperature (soldering, 10sec) .............................+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
(V+ = +5V, V- = -5V, T
A
= +25°C, unless otherwise noted.)
PARAMETER
Input Offset Voltage
Input Bias Current
Input Offset Current
Input Referred Noise Voltage
Input Common-Mode Range
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Output High Voltage
Output Low Voltage
Clock Input Voltage High
Clock Input Voltage Low
Clock Input Current High
Clock Input Current Low
Positive Supply Current
(Note 5)
Negative Supply Current
(Note 5)
Power Dissipation (Note 5)
Propagation Delay
(Notes 6, 7, 9)
Propagation-Delay Skew
Clock Setup Time (Notes 6, 9)
SYMBOL
V
OS
I
B
I
OS
e
n
V
CMR
CMRR
PSRR
V
OH
V
OL
V
IH
V
IL
I
IH
I
IL
I+
I-
PD
t
PD+
t
PD-
t
SKEW
t
SU
MAX915
MAX916
MAX915
MAX916
V+ = 5.25V,
V- = -5.25V
Q,
Q
rising
Q,
Q
falling
(Notes 6, 7, 8)
V
OD
= 5mV
V
OD
= 10mV
MAX915
MAX916
0.5
2.5
14
28
3
6
85
170
6
6
0.5
1.5
1.0
2.0
(Note 2)
(Note 3)
(Note 4)
(Note 4)
2
0.8
10
10
18
36
4
8
115
230
8
8
3.0
2.8
V
CM
= 0V
I
B
+ or I
B
-
V
CM
= 0V
(Note 1)
V- - 0.1
90
60
3.5
0.3
0.4
CONDITIONS
MAX915
MAX916
MIN
TYP
0.5
0.5
5
0.2
600
MAX
1.5
2.0
10
1.0
900
V+ - 2.2
120
120
UNITS
mV
µA
µA
µV
V
µV/V
µV/V
V
V
V
V
µA
µA
mA
mA
mW
ns
ns
ns
2
_______________________________________________________________________________________
Ultra High-Speed, High-Resolution,
Single-/Dual-Supply TTL Comparators
MAX915/MAX916
ELECTRICAL CHARACTERISTICS
(V+ = +5V, V- = -5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
Input Offset Voltage
Input Bias Current
Input Offset Current
Input Referred Noise Voltage
Input Common-Mode Range
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Output High Voltage
Output Low Voltage
Clock Input Voltage High
Clock Input Voltage Low
Clock Input Current High
Clock Input Current Low
Positive Supply Current
(Note 5)
Negative Supply Current
(Note 5)
Power Dissipation
(Note 5)
SYMBOL
V
OS
I
B
I
OS
e
n
V
CMR
CMRR
PSRR
V
OH
V
OL
V
IH
V
IL
I
IH
I
IL
I+
I-
PD
MAX915
MAX916
MAX915
MAX916
V+ = 5.25V,
V- = -5.25V
Q,
Q
rising
MAX915
MAX916
MAX91_C
t
PD+
Propagation Delay
(Notes 6, 7, 9)
t
PD-
Propagation-Delay Skew
Clock Setup Time
(Notes 6, 9)
Note 1:
Note 2:
t
SKEW
t
SU
Q,
Q
falling
(Notes 6, 7, 8)
V
OD
= 5mV
V
OD
= 10mV
MAX91_E
MAX91_M
MAX91_C
MAX91_E
MAX91_M
0.5
2.5
14
28
3
6
85
170
6
6
6
6
6
6
0.5
1.5
1.0
2.0
(Note 2)
(Note 3)
(Note 4)
(Note 4)
2
0.8
15
15
22
44
6
12
150
300
10
12
15
10
12
15
4.0
ns
ns
ns
2.8
V
CM
= 0V
I
B
+ or I
B
-
V
CM
= 0V
(Note 1)
V- - 0.1
90
60
3.5
0.3
0.4
CONDITIONS
MAX915
MAX916
MIN
TYP
0.5
0.5
5
0.2
600
MAX
2.0
3.0
15
2.0
900
V+ - 2.2
150
150
UNITS
mV
µA
µA
µV
V
µV/V
µV/V
V
V
V
V
µA
µA
mA
mA
mW
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Guaranteed by design. Input referred noise voltage uncertainty is specified over the full bandwidth of the device.
Common-mode rejection ratio is tested over the full common-mode range. The common-mode range for dual-supply
operation is from (V- - 0.1V) to (V+ - 2.2V). The common-mode range for single-supply operation is from -0.1V to
(V+ - 2.2V).
Tested for 4.75V < V+ < 5.25V and -5.25V < V- < 0V.
TTL output voltage high and low tested with V+ = 4.75V, I
OH
= 4mA, I
OL
= 8mA.
I+, I-, and PD tested for worst-case condition of V+ = 5.25V and V- = -5.25V. Output not loaded.
Guaranteed by design. Measured in a high-speed fixture with C
L
= 15pF, I
Q
= 2mA. See Figure 1 for timing parameter
definitions. Guaranteed for both single- and dual-supply operation.
Propagation delay measured with an input signal of 100mV, with 5mV overdrive.
Propagation delay skew is defined as the difference in t
PD
for the complementary outputs, Q and
Q
(see Figure 1).
Clock input voltage rise and fall times should not exceed 100ns for correct triggering of comparator.
_______________________________________________________________________________________
3
Ultra High-Speed, High-Resolution,
Single-/Dual-Supply TTL Comparators
MAX915/MAX916
__________________________________________Typical Operating Characteristics
(V+ = +5V, V- = -5V, T
A
= +25°C, unless otherwise noted.)
PROPAGATION DELAY vs.
TEMPERATURE
MAX915-1
CLOCK SETUP TIME vs. SOURCE
RESISTANCE
V
OD
= 5mV
C
L
= 15pF
MAX915-2
PROPAGATION DELAY vs.
CAPACITIVE LOAD
V
OD
= 5mV
PROPAGATION DELAY (ns)
9
t
PD+
8
MAX915-3
13
V
OD
= 5mV
C
L
= 15pF
100
10
PROPAGATION DELAY (ns)
11
t
SU
(ns)
9
t
PD+
10
7
t
PD-
7
t
PD-
5
6
3
-55
-15
25
65
105
TEMPERATURE (°C)
1
10
100
1k
10k
100k
SOURCE RESISTANCE (Ω)
5
0
40
80
120
160
200
C
L
(pF)
CLOCK SETUP TIME vs. INPUT
OVERDRIVE
MAX915-4
CLOCK SETUP TIME vs. TEMPERATURE
MAX915-5
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
MAX915-6
1.0
2.0
200
CLOCK SETUP TIME (ns)
CLOCK SETUP TIME (ns)
0.9
1.5
CMRR (µV/V)
V
OD
= 5mV
C
L
= 15pF
150
0.8
1.0
100
0.7
0.6
C
L
= 15pF
0.5
0
20
40
60
80
100
INPUT OVERDRIVE (mV)
0.5
50
0
-55
-15
25
65
105
TEMPERATURE (°C)
0
-55
-15
25
65
105
TEMPERATURE (°C)
POWER-SUPPLY REJECTION RATIO
vs. TEMPERATURE
MAX915-7
INPUT OFFSET VOLTAGE vs.
TEMPERATURE
MAX915-8
INPUT OFFSET CURRENT vs.
TEMPERATURE
MAX915-10
200
100
0.5
150
PSRR (µV/V)
V
OS
(µV)
50
I
OS
(µA)
-55
-15
25
65
105
0.4
0.3
0.2
100
0
50
-50
0.1
-100
-55
-15
25
65
105
TEMPERATURE (°C)
TEMPERATURE (°C)
0
-55
-15
25
65
105
TEMPERATURE (°C)
0
4
_______________________________________________________________________________________
Ultra High-Speed, High-Resolution,
Single-/Dual-Supply TTL Comparators
____________________________Typical Operating Characteristics (continued)
(V+ = +5V, V- = -5V, T
A
= +25°C, unless otherwise noted.)
MAX915/MAX916
INPUT BIAS CURRENT vs.
TEMPERATURE
MAX915-9
INPUT BIAS CURRENT vs.
COMMON-MODE INPUT VOLTAGE
MAX915-11
INPUT BIAS CURRENTS vs.
DIFFERENTIAL INPUT VOLTAGE
V
IN+
+V
IN
- = 0V
16
IN+
IN-
MAX915-12
10
10
20
8
8
4
I
B
(µA)
4
I
B
(µA)
I
B
(µA)
6
6
12
8
2
2
4
0
-5 -4
-3 -2 -1
0
1
2
3
4
5
-10 -8 -6 -4 -2
0
2
4
6
8 10
V
CM
(V)
DIFFERENTIAL INPUT VOLTAGE, V
IN
+ – V
IN
- (V)
0
-55
-15
25
65
105
TEMPERATURE (°C)
0
OUTPUT VOLTAGE LOW vs.
SINK CURRENT
MAX915-13
OUTPUT VOLTAGE HIGH vs.
SOURCE CURRENT
MAX915-14
SUPPLY CURRENT PER COMPARATOR
vs. TEMPERATURE
MAX915-15
0.5
4.0
20
0.4
3.8
I+, I- (mA)
15
I+
10
V
OH
(V)
V
OL
(V)
0.3
3.6
0.2
3.4
5
0.1
3.2
I-
0
0
2
4
6
8
10
I
OL
(mA)
3.0
0
2
4
6
8
10
I
OH
(mA)
0
-55
-15
25
65
105
TEMPERATURE (°C)
CLOCK SETUP TIME AND PROPAGATION DELAY (Q RISING)
t
PD+
t
SU
t
PD-
t
SKEW
CLOCK SETUP TIME AND PROPAGATION DELAY (Q FALLING)
t
SU
IN+
50mV/div
t
PD-
t
PD+
t
SKEW
GND
IN+
50mV/div
CLK
2V/div
Q
2V/div
Q
5ns/div
5mV
OVERDRIVE
CLK
2V/div
-5mV
OVERDRIVE
Q
2V/div
Q
5ns/div
_______________________________________________________________________________________
5
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