MAX913EPA+ [MAXIM]
Comparator, 1 Func, 3000uV Offset-Max, 10ns Response Time, BIPolar, PDIP8, 0.300 INCH, PLASTIC, DIP-8;
| 型号： | MAX913EPA+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Comparator, 1 Func, 3000uV Offset-Max, 10ns Response Time, BIPolar, PDIP8, 0.300 INCH, PLASTIC, DIP-8 放大器 光电二极管 |
| 文件： | 总11页 (文件大小：1107K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-0157; Rev 2; 8/03
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
General Description
Features
The MAX913 single and MAX912 dual, high-speed,
low-power comparators have differential inputs and
complementary TTL outputs. Fast propagation delay
(10ns, typ), extremely low supply current, and a wide
common-mode input range that includes the negative
rail make the MAX912/MAX913 ideal for low-power,
high-speed, single +5V (or 5V) applications such as
V/F converters or switching regulators.
ꢀ Ultra Fast (10ns)
ꢀ Single +5V or Dual 5V Suꢀꢀlꢁ ꢂꢀeration
ꢀ Inꢀut Range Extends Below Negative Suꢀꢀlꢁ
ꢀ Low Power: 6mA (+5V) Per Comꢀarator
ꢀ No Minimum Inꢀut Signal Slew-Rate Requirement
ꢀ No Power-Suꢀꢀlꢁ Current Sꢀiking
ꢀ Stable in the Linear Region
The MAX912/MAX913 outputs remain stable through
the linear region. This feature eliminates output instabili-
ty common to high-speed comparators when driven
with a slow-moving input signal.
ꢀ Inꢀuts Can Exceed Either Suꢀꢀlꢁ
ꢀ Low ꢂffset Voltage: 0.8mV
The MAX912/MAX913 can be powered from a single
+5V supply or a 5V split supply. The MAX913 is an
improved plug-in replacement for the LT1016. It pro-
vides significantly wider input voltage range and equiv-
alent speed at a fraction of the power. The MAX912
dual comparator has equal performance to the MAX913
and includes independent latch controls.
ꢀ Now Available in a Small µMAX Package
Ordering Information
PART
MAX912CPE
MAX912CSE
MAX912EPE
MAX912ESE
MAX913CPA
MAX913CSA
MAX913EPA
MAX913ESA
MAX913EUA
TEMP RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
16 Plastic DIP
16 Narrow SO
8 Plastic DIP
8 SO
Applications
Zero-Crossing Detectors
Ethernet Line Receivers
Switching Regulators
High-Speed Sampling Circuits
High-Speed Triggers
8 Plastic DIP
8 SO
Extended Range V/F Converters
Fast Pulse Width/Height Discriminators
8 µMAX
Pin Configurations
TOP VIEW
MAX912
QA
1
2
3
4
5
6
7
8
16 QB
15 QB
14 GND
13 LEB
12 N.C.
11 V+
MAX913
QA
GND
LEA
N.C.
V-
V+
IN+
IN-
V-
1
2
3
4
8
7
6
5
Q
Q
A
B
GND
LE
INA-
INA+
10 INB-
9
INB+
DIP/Sꢂ/µMAX
DIP/NARRꢂW Sꢂ
________________________________________________________________ Maxim Integrated Products
1
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.
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
ABSꢂLUTE MAXIMUM RATINGS
Positive Supply Voltage .........................................................+7V
Negative Supply Voltage ........................................................-7V
V+ to V-................................................................................+13V
Differential Input Voltage .....................................................+15V
Input Voltage (Referred to V-) ................................-0.3V to +14V
Latch Pin Voltage .............................................Equal to Supplies
Continuous Output Current............................................... 20mA
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin µMAX (derate 4.5mW/°C above +70°C).............362mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)842mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C).696mW
Operating Temperature Ranges:
MAX91_C_ _ ...........................................................0°C to +70°C
MAX91_E_ _.........................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Continuous Power Dissipation (T = +70°C)
A
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW
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, V = 1.4V, V = 0V, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
MAX A
Q
LE
A
MIN
PARAMETER
SYMBꢂL
CꢂNDITIꢂNS
MIN
TYP
MAX
UNITS
mV
T
A
T
A
= +25°C
0.1
2
3
Input Offset Voltage (Note 2)
Offset Drift
V
R
≤ 100Ω
OS
S
= T
T
MIN TO MAX
TCV
2
µV/°C
µA
OS
T
T
T
= +25°C
0.3
0.5
1
A
A
A
Input Offset Current (Note 2)
I
OS
= T
T
MIN TO MAX
= +25°C
2
5
Input Bias Current
I
µA
B
C, E temperature ranges
C, E temperature ranges
8
-5.2
-0.2
80
+3.5
+3.5
Input Voltage Range
V
V
CM
Single +5V
-5.0V ≤ V
C, E temperature ranges
≤ +3.5V
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Small-Signal Voltage Gain
CMRR
PSRR
110
85
dB
dB
V/V
CM
Positive supply; 4.5V ≤ V+ ≤ 5.5V
Negative supply; -2V ≥ V- ≥ -7V
60
80
100
3500
3.4
A
1V ≤ V ≤ 2V, T = +25°C
1500
2.7
2.4
V
Q
A
I
I
= 1mA
OUT
OUT
V
V+ ≥ 4.5V
OH
= 10mA
3.0
Output Voltage
V
I
= 4mA
0.3
0.5
SINK
V
OL
T
= +25°C, I
= 10mA
0.4
A
SINK
Positive Supply Current Per
Comparator (Note 3)
I+
I-
C, E temperature ranges
6
1
10
2
mA
mA
Negative Supply Current Per
Comparator (Note 3)
Latch-Pin High Input Voltage
Latch-Pin Low Input Voltage
Latch-Pin Current
V
2.0
V
V
IH
V
0.8
-20
IL
IL
I
V
= 0V
-1
µA
LE
2
_______________________________________________________________________________________
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
ELECTRICAL CHARACTERISTICS (continued)
V+ = +5V, V- = -5V, V = 1.4V, V = 0V, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
MAX A
Q
LE
A
MIN
PARAMETER
SYMBꢂL
CꢂNDITIꢂNS
MIN
TYP
MAX
14
16
12
15
4
UNITS
T
A
T
A
T
A
T
A
= +25°C
10
∆V = 100mV,
IN
V
= 5mV
OD
= T
T
MIN TO MAX
Propagation Delay (Note 4)
t
, t
ns
PD+ PD-
= +25°C
= T
9
∆V = 100mV,
IN
V
= 20mV
OD
T
MIN TO MAX
MAX913
MAX912
2
3
Differential Propagation Delay
(Note 4)
∆V = 100mV,
IN
∆t
T
A
= +25°C
ns
ps
PD
V
= 5mV
OD
5
∆V = 100mV,
IN
Channel-to-Channel Propagation
Delay (Note 4)
V
= 5mV
T
A
= +25°C
500
OD
(MAX912 only)
Latch Setup Time (Note 5)
Latch Hold Time (Note 5)
t
2
5
0
2
7
ns
ns
ns
SU
t
H
Latch Propagation Delay (Note 6)
t
LPD
Note 1: All specifications are 100% tested at T = +25°C, unless otherwise noted. Specification limits over temperature (T = T
MIN
A
A
to T
) are guaranteed by design.
MAX
Note 2: Input Offset Voltage (V ) is defined as the average of the two input offset voltages, measured by forcing first one output,
OS
then the other to 1.4V. Input Offset Current (I ) is defined the same way.
OS
Note 3: Supply currents are measured with V driven to both V
and V (not 1.4V).
OL
Q
OH
Note 4: Propagation Delay (t ) and Differential Propagation Delay (∆t ) cannot be measured in automatic handling equipment
PD
PD
with low input overdrive values. Characterization and correlation tests have shown that t and ∆t limits can be guaran-
PD
PD
teed by design. Electrical Characteristic DC tests are performed to guarantee that all internal bias conditions are correct.
For low overdrive conditions, V is added to overdrive. Differential Propagation Delay is defined as ∆t = t - t
.
PD+ PD-
OS
PD
Note 5: Input latch setup time (t ) is the interval in which the input signal must be stable prior to asserting the latch signal. The hold
SU
time (t ) is the interval after the latch is asserted in which the input signal must be stable. These parameters are guaranteed
H
by design.
Note 6: Latch Propagation Delay (t
Timing Diagram).
) is the delay time for the output to respond when the latch-enable pin is deasserted (see
LPD
_______________________________________________________________________________________
3
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
Typical Operating Characteristics
(V+ = +5V, V- = -5V, V = 0V, C = 15pF, T = +25°C, unless otherwise noted.)
LE
L
A
PROPAGATION DELAY
vs. LOAD CAPACITANCE
PROPAGATION DELAY
vs. INPUT OVERDRIVE
PROPAGATION DELAY
vs. SOURCE RESISTANCE
20
14
12
10
8
10
9
V = 10mV
OD
V
= 10mV
OD
18
16
14
12
10
8
t
PD-
8
7
6
5
t
t
PD+
PD+
t
PD+
6
6
t
4
PD-
t
PD-
4
2
2
0
0
1
10
100
1
10
100
1k
10k
10
20
30
40
50
INPUT OVERDRIVE (mV)
SOURCE RESISTANCE (Ω)
LOAD CAPACITANCE (pF)
POSITIVE SUPPLY CURRENT
(PER COMPARATOR)
vs. POSITIVE SUPPLY VOLTAGE
NEGATIVE SUPPLY CURRENT
(PER COMPARATOR)
vs. NEGATIVE SUPPLY VOLTAGE
PROPAGATION DELAY
vs. TEMPERATURE
11
10
9
10
1.4
1.2
1.0
0.8
0.6
0.4
0.2
T
= +85°C
A
V
= 5mV
OD
V- = 0 TO 5V
9
8
7
6
5
4
3
2
1
0
Q OUTPUT
PD-
t
T
T
= +85°C
A
A
Q OUTPUT
T
= +25°C
A
t
PD-
Q OUTPUT
PD+
t
8
T
= -40°C
A
T
= +25°C
A
= -40°C
7
6
Q OUTPUT
t
PD+
5
-40
-20
0
20
60
80
3
4
5
6
7
0
1
2
3
4
5
6
7
40
TEMPERATURE (°C)
V+ (V)
V- (V)
INPUT BIAS CURRENT
vs. TEMPERATURE
OFFSET VOLTAGE
vs. TEMPERATURE
OUTPUT VOLTAGE
vs. DIFFERENTIAL INPUT VOLTAGE
3.0
2.5
2.0
1.5
1.0
0.5
0
600
500
400
300
200
100
0
5
4
3
2
1
0
V
= -5.2V
CM
V
V
= 0V
= 3.5V
CM
CM
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
-3
-2
-1
0
1
2
3
TEMPERATURE (°C)
TEMPERATURE (°C)
DIFFERENTIAL INPUT VOLTAGE (mV)
4
_______________________________________________________________________________________
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
Typical Operating Characteristics (continued)
(V+ = +5V, V- = -5V, V = 0V, C = 15pF, T = +25°C, unless otherwise noted.)
LE
L
A
POSITIVE-TO-NEGATIVE PROPAGATION DELAY
NEGATIVE-TO-POSITIVE PROPAGATION DELAY
INPUT
100mV/div
INPUT
100mV/div
OUTPUT
Q
OUTPUT
Q
1V/div
Q
1V/div
Q
5ns/div
5ns/div
MAX912/MAX913 RESPONSE TO
50MHZ ( 10mV ) SINE WAVE
P-P
INPUT
10mV/div
OUTPUT
Q
2V/div
10ns/div
MAX912/MAX913 RESPONSE TO SLOW-MOVING TRIANGLE WAVE
INDUSTRY-STANDARD
MAX912/MAX913 RESPONSE
686 RESPONSE
INPUT
20mV/div
INPUT
20mV/div
OUTPUT
Q
1V/div
OUTPUT
Q
1V/div
Q
Q
1V/div
1V/div
20µs/div
20µs/div
_______________________________________________________________________________________
5
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
MAX912 Pin Description
PIN
1
NAME
QA
FUNCTIꢂN
Comparator A TTL Output
2
QA
Comparator A Complementary TTL Output
3, 14
GND
Logic Ground. Connect both GND pins to ground.
Comparator A Latch Enable. QA and QA are latched when LEA is TTL high or floating. Comparator A
latch is transparent when LEA is low.
4
5, 12
6
LEA
N.C.
V-
No Connection. Not internally connected.
Negative Power Supply. -5V for dual supplies (bypass to GND with a 0.1µF capacitor) or GND for a
single supply.
7
8
INA-
INA+
INB+
INB-
V+
Comparator A Inverting Input
Comparator A Noninverting Input
9
Comparator B Noninverting Input
10
11
Comparator B Inverting Input
Positive Power Supply, +5V. Bypass to GND with a 0.1µF capacitor.
Comparator B Latch Enable. QB and QB are latched when LEB is TTL high or floating. Comparator B
latch is transparent when LEB is low.
13
LEB
15
16
QB
Comparator B Complementary TTL Output
Comparator B TTL Output
QB
MAX913 Pin Description
PIN
1
NAME
V+
FUNCTIꢂN
Positive Power Supply. Bypass to GND with a 0.1µF capacitor.
Noninverting Input
2
IN+
IN-
3
Inverting Input
Negative Power Supply. -5V for dual supplies (bypass to GND with a 0.1µF capacitor) or GND for a
single supply.
4
5
V-
Latch Enable. Q and Q are latched when LE is TTL high or floating. The comparator latch is
transparent when LE is low.
LE
6
7
8
GND
Q
Logic Ground
TTL Output
Q
Complementary TTL Output
6
_______________________________________________________________________________________
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
+25°C. Input common-mode range extends from
Detailed Description
200mV below the negative supply rail to 1.5V below
the positive power supply. The total common-mode
range is 8.7V when operating from 5VDC supplies.
The MAX912 (dual) and MAX913 (single) high-speed
comparators have a unique design that prevents oscil-
lation when the comparator is in its linear region. No
minimum input slew rate is required.
The MAX912/MAX913’s amplifier has no built-in hys-
teresis. For highest accuracy, do not add hysteresis.
Figure 2 shows how hysteresis degrades resolution.
Many high-speed comparators oscillate in the linear
region, as shown in the Typical Operating Characteris-
tics’ industry-standard 686 response graph. One way
to overcome this oscillation is to sample the output after
it has passed through the unstable region. Another
practical solution is to add hysteresis. Either solution
results in a loss of resolution and bandwidth.
Resolution
A comparator’s ability to resolve small signal differ-
ences—its resolution—is affected by various factors.
As with most amplifiers, the most significant factors are
the input offset voltage (V ) and the common-mode
OS
and power-supply rejection ratios (CMRR, PSRR). If
source impedance is high, input offset current can be
significant. If source impedance is unbalanced, the
input bias current can introduce another error.
Because the MAX912/MAX913 do not need hysteresis,
they offer high resolution to all signals—including low-
frequency signals.
The MAX912/MAX913 provide a TTL-compatible latch
function that holds the comparator output state (Figure 1).
As long as Latch Enable (LE) is high or floating, the input
signal has no effect on the output state. With LE low, the
outputs are controlled by the input differential voltage
and the latch is transparent.
For high-speed comparators, an additional factor in
resolution is the comparator’s stability in its linear
region. Many high-speed comparators are useless in
their linear region because they oscillate. This makes
the differential input voltage region around 0V unus-
able, as does a high V . Hysteresis does not cure the
OS
Input Amplifier
A comparator can be thought of as having two sec-
tions; an input amplifier and a logic interface. The
MAX912/MAX913’s input amplifier is fully differential
with input offset voltage trimmed to below 2.0mV at
problem, but acts to keep the input away from its linear
range (Figure 2).
The MAX912/MAX913 do not oscillate in the linear
region, which greatly enhances the comparator’s reso-
lution.
t
SU
V
IN
(DIFFERENTIAL)
t
H
LATCH
ENABLE (LE)
t
t
LPD
PD+
Q
Q
∆t
PD
t
PD-
Figure 1. Timing Diagram
_______________________________________________________________________________________
7
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
1) Use a printed circuit board with an unbroken ground
Applications Information
plane.
Power Supplies and Bypassing
2) Pay close attention to the bandwidth of bypass com-
ponents and keep leads short.
The MAX912/MAX913 are tested with 5V power sup-
plies that provide an input common-mode range (V
)
CM
3) Avoid sockets; solder the comparator and other
components directly to the board to minimize
unwanted parasitic inductance and capacitance.
of 8.7V (-5.2V to +3.5V). Operation from a single +5V
supply provides a common-mode input range of 3.7V
(-0.2V to +3.5). Connect V- to GND for single-supply
operation. The MAX912/MAX913 will operate from a
minimum single-supply voltage of +4.5V.
Input Slew Rate
The MAX912/MAX913 design eliminates the input slew-
rate requirement imposed on many standard compara-
tors. As long as LE is high after the maximum propaga-
tion delay and the input is greater than the
comparator’s total DC error, the output will be valid
without oscillations.
The V+ supply provides power to both the analog input
stage and digital output circuits, whereas the V- supply
only powers the analog section. Bypass V+ and V- to
ground with 0.1µF to 1.0µF ceramic capacitors in parallel
with 10µF or greater tantalum capacitors. Connect the
ceramic capacitors very close to the MAX912/MAX913’s
supply pins, keeping leads short to minimize lead induc-
tance. For particularly noisy applications, use ferrite
beads on the power-supply lines.
Maximum Clock (LE) and Signal Rate
The maximum clock and signal rate is 70MHz, based
on the comparator’s rise and fall time with a 5mV over-
drive at +25°C (Figure 1). With a 20mV overdrive, the
maximum propagation delay is 12ns and the clock sig-
nal rate is 85MHz.
Board Layout
As with all high-speed components, careful attention to
layout is essential for best performance.
IN+
HYSTERESIS
BAND*
IN-
Q
WITH HYSTERESIS
IDEAL (WITHOUT HYSTERESIS)
*WHEN HYSTERESIS IS ADDED, A COMPARATOR CANNOT RESOLVE ANY INPUT SIGNAL WITHIN THE HYSTERESIS BAND.
Figure 2. Effect of Hysteresis on Input Resolution
Chip Information
MAX912 TRANSISTOR COUNT: 285
MAX913 TRANSISTOR COUNT: 154
PROCESS: Bipolar
8
_______________________________________________________________________________________
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/ꢀackages.)
4X S
8
8
MILLIMETERS
INCHES
DIM MIN
MAX
MAX
MIN
-
-
0.043
0.006
0.037
0.014
0.007
0.120
1.10
0.15
0.95
0.36
0.18
3.05
A
0.002
0.030
0.010
0.005
0.116
0.05
0.75
0.25
0.13
2.95
A1
A2
b
E
H
ÿ 0.50 0.1
c
D
e
0.0256 BSC
0.65 BSC
0.6 0.1
E
H
0.116
0.188
0.016
0∞
0.120
2.95
4.78
0.41
0∞
3.05
5.03
0.66
6∞
0.198
0.026
6∞
L
1
1
α
S
0.6 0.1
0.0207 BSC
0.5250 BSC
BOTTOM VIEW
D
TOP VIEW
A1
A2
A
c
α
e
L
b
SIDE VIEW
FRONT VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 8L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0036
J
1
_______________________________________________________________________________________
9
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/ꢀackages.)
INCHES
MILLIMETERS
DIM
A
MIN
MAX
0.069
0.010
0.019
0.010
MIN
1.35
0.10
0.35
0.19
MAX
1.75
0.25
0.49
0.25
0.053
0.004
0.014
0.007
N
A1
B
C
e
0.050 BSC
1.27 BSC
E
0.150
0.228
0.016
0.157
0.244
0.050
3.80
5.80
0.40
4.00
6.20
1.27
E
H
H
L
VARIATIONS:
INCHES
1
MILLIMETERS
DIM
D
MIN
MAX
0.197
0.344
0.394
MIN
4.80
8.55
9.80
MAX
5.00
N
8
MS012
AA
TOP VIEW
0.189
0.337
0.386
D
8.75 14
10.00 16
AB
D
AC
D
C
A
B
0∞-8∞
e
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0041
B
1
10 ______________________________________________________________________________________
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/ꢀackages.)
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11
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Printed USA
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