MAX999AAUK+T [MAXIM]
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators; 单/双/四路，超高速， + 3V / 5V + ，超摆幅比较
| 型号： | MAX999AAUK+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators |
| 文件： | 总16页 (文件大小：314K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1129; Rev 6; 2/08
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
1–647/MAX9
_________________General Description
____________________________Features
♦ Ultra-Fast, 4.5ns Propagation Delay
The MAX961–MAX964/MAX997/MAX999 are low-power,
ultra-high-speed comparators with internal hysteresis.
These devices are optimized for single +3V or +5V
operation. The input common-mode range extends
100mV Beyond-the-Rails™, and the outputs can sink
♦ Ideal for +3V and +5V Single-Supply Applications
♦ Beyond-the-Rails Input Voltage Range
♦ Low, 5mA Supply Current (MAX997/MAX999)
♦ 3.5mV Internal Hysteresis for Clean Switching
♦ Output Latch (MAX961/MAX963)
or source 4mA to within 0.52V of GND and V
.
CC
Propagation delay is 4.5ns (5mV overdrive), while sup-
ply current is 5mA per comparator.
♦ TTL/CMOS-Compatible Outputs
The MAX961/MAX963/MAX964 and MAX997 have a
shutdown mode in which they consume only 270µA
supply current per comparator. The MAX961/MAX963
provide complementary outputs and a latch-enable fea-
ture. Latch enable allows the user to hold a valid com-
parator output. The MAX999 is available in a tiny
SOT23-5 package. The single MAX961/MAX997 and
dual MAX962 are available in space-saving 8-pin
♦ Shutdown Mode
(MAX961/MAX963/MAX964/MAX997)
♦ Available in Space-Saving Packages:
5-Pin SOT23 (MAX999)
8-Pin µMAX (MAX961/MAX962/MAX997)
16-Pin QSOP (MAX964)
Ordering Information
®
µMAX packages.
TOP
MARK
PKG
CODE
PART
PIN-PACKAGE
________________________Applications
Single 3V/5V Systems
MAX961ESA
MAX961EUA-T
MAX962ESA
MAX962EUA-T
MAX963ESD
MAX964ESE
MAX964EEE
8 SO
—
—
S8-2
U8-1
S8-2
8 µMAX-8
8 SO
Portable/Battery-Powered Systems
Threshold Detectors/Discriminators
GPS Receivers
—
8 µMAX-8
14 SO
—
U8-1
S14-1
S16-1
E16-1
S8-2
—
Line Receivers
16 Narrow SO
16 QSOP
8 SO
—
Zero-Crossing Detectors
—
MAX997ESA
MAX997EUA-T
MAX999AAUK+T
MAX999EUK-T
—
High-Speed Sampling Circuits
8 µMAX-8
5 SOT23-5
5 SOT23-5
—
U8-1
U5+1
U5-1
+AFEI
ACAB
Selector Guide
Note: All E grade devices are specified over the -40°C to +85°C
operating temperature range. MAX999AAUK is specified over the
-40°C to +125°C operating temperature range.
+Denotes a lead-free package.
Pin Configurations
TOP VIEW
Q
GND
IN+
1
2
3
5
V
CC
MAX961
MAX962
MAX963
MAX964
MAX997
MAX999
1
2
2
4
1
1
Yes
No
Yes
No
Yes
No
8 SO/µMAX
8 SO/µMAX
14 SO
MAX999
Yes
No
Yes
Yes
Yes
No
Yes
No
16 SO/QSOP
8 SO/µMAX
5 SOT23
No
No
4
IN-
No
No
SOT23-5
Beyond-the-Rails is a trademark and µMAX is a registered
trademark of Maxim Integrated Products, Inc.
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
to GND................................... -0.3V to +6V
14-Pin SO (derate 8.33mW/°C above +70°C).........667mW/°C
16-Pin SO (derate 8.70mW/°C above +70°C).........696mW/°C
16-Pin QSOP (derate 8.33mW/°C above +70°C)....667mW/°C
Operating Temperature Range
CC
All Other Pins..............................................-0.3V to (V
+ 0.3V)
CC
Current into Input Pins...................................................... 20mA
Duration of Output Short Circuit to GND or V .......Continuous
CC
Continuous Power Dissipation (T = +70°C)
MAX96_E/MAX99_E.........................................-40°C to +85°C
MAX999AAUK ...............................................-40°C to +125°C
Storage Temperature Range............................ -65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
A
5-Pin SOT23 (derate 7.1mW/°C above +70°C).......571mW/°C
8-Pin SO (derate 5.88mW/°C above +70°C)...........471mW/°C
8-Pin µMAX (derate 4.10mW/°C above +70°C)......330mW/°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
= +2.7V to +5.5V, V
= 0V, C
= 5pF, V
= 0V, V = 0V, unless otherwise noted. T
LE
to T
is -40°C to +85°C for all
CC
CM
OUT
SHDN
MIN
MAX
E grade devices. For MAX999AAUK only, T
to T
is -40°C to +125°C.) (Note 1)
MIN
MAX
T
A
= +25°C
TYP
T
MIN
to T
MAX
PARAMETER
Supply Voltage
SYMBOL
CONDITIONS
UNITS
MIN
MAX
MIN
TYP
MAX
V
CC
Inferred by PSRR
(Note 2)
2.7
5.5
2.7
5.5
V
V
Input Common-Mode
Voltage Range
V
CC
0.1
+
V
+
CC
0.1
V
CMR
-0.1
-0.1
µMAX, SOT23
MAX999AAUK
2.0
2.0
3.5
3.5
6.5
V
= -0.1V
CM
8.0
or 5.1V, V
= 5V
(Note 3)
CC
Input-Referred Trip Points
Input-Referred Hysteresis
Input Offset Voltage
V
mV
mV
mV
TRIP
All other E
packages
2.0
3.5
4.0
3.5
0.5
0.5
µMAX, SOT23
MAX999AAUK
1.5
1.5
4.5
6.0
V
CM
= -0.1V
or 5.1V, V
= 5V
(Note 4)
CC
V
OS
All other E
packages
0.5
1.5
15
15
2.0
30
15
1–647/MAX9
µMAX, SOT23
V
IN+
= V
IN-
Input Bias Current
I
µA
= 0V or V
,
B
CC
= 5V
All other E
packages
V
CC
Differential Input Clamp
Voltage
V
= 5.5V, V = 0V,
IN-
= 100µA
CC
2.1
3
V
I
IN+
Input Capacitance
pF
kΩ
kΩ
Differential Input
Impedance
R
V
V
= 5V
= 5V
8
IND
CC
Common-Mode Input
R
130
INCM
CC
2
_______________________________________________________________________________________
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
1–647/MAX9
ELECTRICAL CHARACTERISTICS (continued)
(V
= +2.7V to +5.5V, V
= 0V, C
= 5pF, V
= 0V, V = 0V, unless otherwise noted. T
to T
is -40°C to +85°C for all
CC
CM
OUT
SHDN
LE
MIN
MAX
E grade devices. For MAX999AAUK only, T
to T
is -40°C to +125°C.) (Note 1)
MIN
MAX
T
A
= +25°C
TYP
T
to T
MAX
MIN
PARAMETER
SYMBOL
CMRR
CONDITIONS
UNITS
mV/V
mV/V
V
MIN
MAX
MIN
TYP
MAX
V
V
= 5V,
= -0.1V
CC
µMAX, SOT23
0.1
0.1
0.3
1.0
0.5
0.3
Common-Mode Rejection
Ratio
CM
to 5.1V
(Note 5)
All other E
packages
0.3
0.3
Power-Supply Rejection
Ratio
PSRR
V
CM
= 0V (Note 6)
0.05
V
CC
-
-
V
CC
0.52
-
-
E grade
0.52
I
=
SOURCE
Output High Voltage
V
OH
4mA
V
CC
V
CC
0.55
MAX999AAUK
0.52
E grade
0.52
0.52
0.52
0.55
Output Low Voltage
V
OL
I
= 4mA
SINK
V
MAX999AAUK
Capacitive Slew Current
Output Capacitance
V
OUT
= 1.4V, V
= 2.7V
30
60
4
mA
pF
CC
MAX961/MAX963, V
MAX962/MAX964, V
= 5V
= 5V
7.2
5
11
8
11
9
CC
CC
Supply Current per
Comparator
I
mA
CC
MAX997/MAX999E, V
= 5V
= 5V
5
6.5
6.5
6.5
7.0
CC
MAX999AAUK, V
CC
5
Shutdown Supply Current
per Comparator
MAX961/MAX963/MAX964/
MAX997, V = 5V
I
0.27
0.5
0.5
mA
µA
SHDN
CC
MAX961/MAX963/MAX964/
MAX997, V = 5V and
Shutdown Output Leakage
Current
1
20
OUT
V
CC
- 5V
Rise/Fall Time
t , t
V
CC
= 5V
2.3
ns
V
R
F
V
+ 0.4
/2
V
+ 0.4
/2
CC
CC
Logic-Input High
V
IH
V
- 0.4
/2
V
- 0.4
/2
CC
CC
Logic-Input Low
V
IL
V
Logic-Input Current
I
t
, I
IL IH
V
= 0V or V
CC
15
30
µA
LOGIC
5mV
overdrive
(Note 7)
E grade
4.5
4.5
7.0
8.5
Propagation Delay
t
t
ns
PD
PD
MAX999AAUK
7.0
10
Differential Propagation
Delay
Between any two channels or
outputs (Q/Q)
0.3
0.3
ns
ns
Propagation-Delay Skew
Between t
and t
PD- PD+
SKEW
_______________________________________________________________________________________
3
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
ELECTRICAL CHARACTERISTICS (continued)
(V
= +2.7V to +5.5V, V
= 0V, C
= 5pF, V
= 0V, V = 0V, unless otherwise noted. T
to T
is -40°C to +85°C for all
CC
CM
OUT
SHDN
LE
MIN
MAX
E grade devices. For MAX999AAUK only, T
to T
is -40°C to +125°C.) (Note 1)
MIN
MAX
T
A
= +25°C
TYP
T
MIN
to T
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
MIN
MAX
5
MIN
TYP
MAX
Data-to-Latch Setup Time
Latch-to-Data Hold Time
Latch Pulse Width
t
MAX961/MAX963 (Note 8)
MAX961/MAX963 (Note 8)
MAX961/MAX963 (Note 8)
MAX961/MAX963 (Note 8)
5
5
ns
ns
ns
ns
SU
t
5
H
t
5
5
LPW
Latch Propagation Delay
t
10
10
LPD
Delay until output is high-Z
(> 10kΩ)
Shutdown Time
t
150
250
ns
ns
OFF
Shutdown Disable Time
t
Delay until output is valid
ON
Note 1: The MAX961EUA/MAX962EUA/MAX997EUA/MAX999EUK are 100% production tested at T = +25°C; all temperature specifica-
A
tions are guaranteed by design.
Note 2: Inferred by CMRR. Either input can be driven to the absolute maximum limit without false output inversion, provided that the other
input is within the input voltage range.
Note 3: The input-referred trip points are the extremities of the differential input voltage required to make the comparator output change
state. The difference between the upper and lower trip points is equal to the width of the input-referred hysteresis zone. (See
Figure 1.)
Note 4: Input offset voltage is defined as the mean of the trip points.
Note 5: CMRR = (V
- V
OSH
) / 5.2V, where V
is the offset at V
= -0.1V and V
is the offset at V
= 5.1V.
OSL
OSL
CM
OSH
CM
Note 6: PSRR = (V 2.7 - V 5.5) / 2.8V, where V 2.7 is the offset voltage at V = 2.7V, and V 5.5 is the offset voltage at
OS
OS
OS
CC
OS
V
CC
= 5.5V.
Note 7: Propagation delay for these high-speed comparators is guaranteed by design characterization because it cannot be accurately
measured using automatic test equipment. A statistically significant sample of devices is characterized with a 200mV step and
100mV overdrive over the full temperature range. Propagation delay can be guaranteed by this characterization, since DC tests
ensure that all internal bias conditions are correct. For low overdrive conditions, V
is added to the overdrive.
TRIP
Note 8: Guaranteed by design.
1–647/MAX9
4
_______________________________________________________________________________________
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
1–647/MAX9
__________________________________________Typical Operating Characteristics
(V
= +3.0V, C
= 5pF, 5mV of overdrive, T = +25°C, unless otherwise noted.)
LOAD A
CC
PROPAGATION DELAY
vs. TEMPERATURE
PROPAGATION DELAY
vs. CAPACITIVE LOAD
PROPAGATION DELAY
vs. INPUT OVERDRIVE
6.8
6.6
6.4
6.2
6.0
5.8
8
7
6
7.5
7.0
6.5
6.0
5.5
5.0
4.5
t
PD-
t
PD
+
t
PD
-
t
PD+
5.6
5.4
5.2
5
4
t
PD-
4.0
3.5
t
PD+
5.0
-40
-20
0
20
40
60
85
0
20
40
60
80
100
120
0
10 20 30 40 50 60 70 80 90 100
INPUT OVERDRIVE (mV)
TEMPERATURE (°C)
CAPACITIVE LOAD (pF)
PROPAGATION DELAY
vs. SUPPLY VOLTAGE
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
0.5
0.4
0.3
0.2
6.0
5.5
2.80
2.75
2.70
2.65
2.60
T = +85°C
A
T = +25°C
T = -40°C
A
A
T = -40°C
T = +25°C
T = +85°C
A
A
A
t
PD
-
0.1
0
2.55
2.50
t
PD
+
5.0
2.5 3.0
3.5 4.0 4.5
5.0 5.5 6.0
1
10
100
1000
10,000
1
10
100
1000
10,000
SUPPLY VOLTAGE (V)
SINK CURRENT (μA)
SOURCE CURRENT (μA)
MAX961/MAX963
MAX962/MAX964
MAX997/MAX999
SUPPLY CURRENT PER COMPARATOR
vs. SUPPLY VOLTAGE
SUPPLY CURRENT PER COMPARATOR
vs. SUPPLY VOLTAGE
SUPPLY CURRENT PER COMPARATOR
vs. SUPPLY VOLTAGE
8.0
7
6
5
4
3
9
8
7
6
5
4
3
7.5
7.0
T = +85°C
T = +85°C
A
A
T = +25°C
T = +85°C
A
T = +25°C
A
A
T = +25°C
A
T = -40°C
A
6.5
6.0
T = -40°C
A
T = -40°C
A
2
3
4
5
6
2
3
4
5
6
2
3
4
5
6
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
____________________________Typical Operating Characteristics (continued)
(V
= +3.0V, C
= 5pF, 5mV of overdrive, T = +25°C, unless otherwise noted.)
LOAD
A
CC
MAX961/MAX963/MAX964/MAX997
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
VOLTAGE TRIP POINT/INPUT OFFSET
VOLTAGE vs. TEMPERATURE
VOLTAGE TRIP POINT/INPUT OFFSET
VOLTAGE vs. SUPPLY VOLTAGE
3
2
4
3
310
260
210
V
TRIP+
V
CC
= 5.0V
2
V
TRIP+
1
1
V
OS
0
0
160
110
60
V
4
OS
-1
-2
-3
-4
-1
V
CC
= 2.7V
-2
-3
V
TRIP-
V
TRIP-
-40
-20
0
20
40
60
85
2
3
5
6
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
INPUT BIAS CURRENT (I , I
vs. COMMON-MODE VOLTAGE
)
SHORT-CIRCUIT OUTPUT CURRENT
vs. TEMPERATURE
B+ B-
INPUT BIAS CURRENT/INPUT OFFSET
CURRENT vs. TEMPERATURE
8
140
120
100
80
4.0
3.5
3.0
2.5
2.0
1.5
V
V
= 5.0V
I
OUTPUT SHORTED
CC
IN
B-
T = +85°C
A
6
4
= V
OS
TO V (SINKING)
CC
I
B+
NEGATIVE
VALUES
REPRESENT
CURRENT
FLOWING INTO
THE DEVICE
T = +25°C
A
2
OUTPUT SHORTED
TO GND (SOURCING)
0
60
40
20
0
T = -40°C
A
-2
-4
-6
-8
1.0
0.5
0
I
OS
1–647/MAX9
-0.5
-40 -20
0
20
40
60
80
-1
0
1
2
3
4
5
6
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
V
CM
(V)
TEMPERATURE (°C)
50MHz RESPONSE
V
IN
= 100mV
P-P
V
OS
INPUT
50mV/div
OUTPUT
1V/div
GND
5ns/div
6
_______________________________________________________________________________________
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
1–647/MAX9
____________________________Typical Operating Characteristics (continued)
(V
= +3.0V, C
= 5pF, 5mV of overdrive, T = +25°C, unless otherwise noted.)
A
LOAD
CC
PROPAGATION DELAY (t
)
PROPAGATION DELAY (t
)
PD-
PD+
MAX997toc15
MAX997toc16
GND
INPUT
50mV/div
INPUT
50mV/div
GND
OUTPUT
1V/div
OUTPUT
1V/div
GND
GND
5ns/div
5ns/div
______________________________________________________________Pin Description
PIN
NAME
FUNCTION
MAX997 MAX999 MAX961 MAX962 MAX963 MAX964
1, 5
2
—
4
—
2
—
2
—
1
—
1
N.C.
No Connection. Not internally connected.
IN-, INA- Comparator A Inverting Input
3
3
1
1
2
2
IN+, INA+ Comparator A Noninverting Input
LE, LEA, Latch-Enable Input. The output latches when LE_
—
—
4
—
5
3, 5
4, 11
—
—
12
16
LEB
is high. The latch is transparent when LE_ is low.
GND
Ground
4
2
5
No Connection. Connect to GND to prevent par-
asitic feedback.
—
—
—
—
N.C.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
4
6
3
4
5
6
7
8
INB-
INB+
INC-
INC+
IND-
IND+
Comparator B Inverting Input
Comparator B Noninverting Input
Comparator C Inverting Input
Comparator C Noninverting Input
Comparator D Inverting Input
Comparator D Noninverting Input
3
7
—
—
—
—
—
—
—
—
Shutdown Input. The device shuts down when
SHDN is high.
8
—
3
8
9
SHDN
—
—
—
—
—
—
—
—
—
—
—
—
—
6
9
14
11
10
—
QB
QC
QD
QB
Comparator B Output
—
—
10
Comparator C Output
—
—
—
Comparator D Output
Comparator B Complementary Output
Positive Supply Input (V
≤5.5V)
to GND must be
CC
7
5
8
8
12
13
V
CC
6
1
6
7
7
13
14
15
—
Q, QA
Comparator A TTL Output
—
—
Comparator A Complementary Output
—
Q, QA
_______________________________________________________________________________________
7
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
voltage to move quickly past the other, thus taking the
_______________Detailed Description
input out of the region where oscillation occurs. Standard
The MAX961–MAX964/MAX997/MAX999 single-supply
comparators require hysteresis to be added with external
comparators feature internal hysteresis, ultra-high-
resistors. The fixed internal hysteresis eliminates these
speed operation, and low power consumption. Their
resistors.
outputs are guaranteed to pull within 0.52V of either rail
The MAX961/MAX963 include internal latches that allow
storage of comparison results. LE has a high input
impedance. If LE is low, the latch is transparent (i.e.,
the comparator operates as though the latch is not pre-
sent). The comparator’s output state is stored when LE
is pulled high. All timing constraints must be met when
using the latch function (Figure 2).
without external pullup or pulldown circuitry. Beyond-
the-Rails input voltage range and low-voltage, single-
supply operation make these devices ideal for portable
equipment. These comparators all interface directly to
CMOS logic.
Timing
Most high-speed comparators oscillate in the linear
region because of noise or undesirable parasitic feed-
back. This can occur when the voltage on one input is
close to or equal to the voltage on the other input.
These devices have a small amount of internal hystere-
sis to counter parasitic effects and noise.
Input Stage Circuitry
The MAX961–MAX964/MAX997/MAX999 include inter-
nal protection circuitry that prevents damage to the pre-
cision input stage from large differential input voltages.
This protection circuitry consists of two groups of three
front-to-back diodes between IN+ and IN-, as well as
two 200Ω resistors (Figure 3). The diodes limit the dif-
ferential voltage applied to the comparator’s internal
The added hysteresis of the MAX961–MAX964/MAX997/
MAX999 creates two trip points: one for the rising input
voltage and one for the falling input voltage (Figure 1).
The difference between the trip points is the hysteresis.
When the comparator’s input voltages are equal, the
hysteresis effectively causes one comparator input
circuitry to no more than 3V , where V is the diode’s
F
F
forward-voltage drop (about 0.7V at +25°C).
V
TRIP+
V
IN+
V
V
+ V
2
HYST
TRIP-
TRIP+
TRIP-
V
V
=
OS
1–647/MAX9
= 0V
IN-
V
V
OH
V
V
Q
Q
OL
OH
V
OL
Figure 1. Input and Output Waveforms, Noninverting Input Varied
8
_______________________________________________________________________________________
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
1–647/MAX9
t
SU
t
H
DIFFERENTIAL
INPUT
V
OS
VOLTAGE
t
LPW
V
CC
0V
V
2
CC
LE
t
t
LPD
PD
V
OH
V
CC
2
Q
Q
V
OL
V
CC
2
t
t
SKEW
SKEW
Figure 2. MAX961/MAX963 Timing Diagram
For a large differential input voltage (exceeding 3V ),
F
this protection circuitry increases the input bias current
at IN+ (source) and IN- (sink).
MAX961-MAX964
MAX997
(IN+ - IN-) - 3V
F
MAX999
Input current = ————————
2 x 200
200Ω
Input currents with large differential input voltages
TO INTERNAL
CIRCUITRY
IN+
IN-
should not be confused with input bias currents (I ).
B
As long as the differential input voltage is less than
3V , this input current is less than 2I .
F
B
The input circuitry allows the MAX961–MAX964/
MAX997/MAX999’s input common-mode range to
extend 100mV beyond both power-supply rails. The
output remains in the correct logic state if one or both
inputs are within the common-mode range. Taking
either input outside the common-mode range causes
the input to saturate and the propagation delay to
increase.
TO INTERNAL
CIRCUITRY
200Ω
Figure 3. Input Stage Circuitry
_______________________________________________________________________________________
9
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
V
CC
I
SOURCE
MAX961-MAX964
MAX997
MAX999
Q, Q
I
SINK
GND
Figure 5. MAX961 PCB Layout
Figure 4. Output Stage Circuitry
Output Stage Circuitry
The MAX961–MAX964/MAX997/MAX999 contain a cur-
rent-driven output stage, as shown in Figure 4. During an
__________Applications Information
Circuit Layout and Bypassing
The MAX961–MAX964/MAX997/MAX999’s high band-
width requires a high-speed layout. Follow these layout
guidelines:
output transition, I
or I
is pushed or pulled to
SOURCE
SINK
the output pin. The output source or sink current is high
during the transition, creating a rapid slew rate. Once the
output voltage reaches V
or V , the source or sink
OL
OH
1) Use a PCB with a good, unbroken, low-inductance
ground plane.
1–647/MAX9
current decreases to a small value, capable of maintain-
ing the V or V in static condition. This decrease in
OH
OL
2) Place a decoupling capacitor (a 0.1µF ceramic sur-
face-mount capacitor is a good choice) as close to
current conserves power after an output transition has
occurred.
V
CC
as possible.
One consequence of a current-driven output stage is a
linear dependence between the slew rate and the load
capacitance. A heavy capacitive load slows down the
voltage output transition.
3) On the inputs and outputs, keep lead lengths short
to avoid unwanted parasitic feedback around the
comparators. Keep inputs away from outputs. Keep
impedance between the inputs low.
Shutdown Mode
When SHDN is high, the MAX961/MAX963/MAX964/
MAX997 shut down. When shut down, the supply cur-
rent drops to 270µA per comparator, and the outputs
become high impedance. SHDN has a high input
impedance. Connect SHDN to GND for normal opera-
tion. Exit shutdown with LE low; otherwise, the output is
indeterminate.
4) Solder the device directly to the printed circuit board
rather than using a socket.
5) Refer to Figure 5 for a recommended circuit layout.
6) For slow-moving input signals, take care to prevent
parasitic feedback. A small capacitor (1000pF or
less) placed between the inputs can help eliminate
oscillations in the transition region. This capacitor
causes negligible degradation to t
source impedance is low.
when the
PD
10 ______________________________________________________________________________________
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
1–647/MAX9
Pin Configurations
TOP VIEW
1
2
3
4
8
7
6
5
V
1
2
3
4
8
7
6
5
INA+
INA-
INB+
INB-
V
IN+
IN-
CC
CC
QA
Q
MAX962
MAX961
QB
Q
SHDN
LE
GND
GND
SO/μMAX
SO/μMAX
INA-
INA+
LEA
1
2
3
4
5
6
7
14 QA
13 QA
12
INA-
INA+
INB-
INB+
INC-
INC+
IND-
IND+
1
2
3
4
5
6
7
8
16 N.C.
SHDN
1
8
7
6
5
N.C.
IN-
15 QA
14 QB
V
CC
2
3
4
MAX997
V
CC
Q
IN+
GND
LEB
11 GND
10 QB
MAX963
MAX964
13 V
CC
GND
N.C.
12 GND
11 QC
10 QD
INB-
INB+
9
8
QB
SO/μMAX
SHDN
9
SHDN
SO
SO/QSOP
___________________Chip Information
MAX961/MAX962 TRANSISTOR COUNT: 286
MAX963/MAX964 TRANSISTOR COUNT: 607
MAX997/MAX999 TRANSISTOR COUNT: 142
______________________________________________________________________________________ 11
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails 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/packages.)
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
Ø0.50±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:
1–647/MAX9
PACKAGE OUTLINE, 8L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0036
J
1
12 ______________________________________________________________________________________
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
1–647/MAX9
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/packages.)
______________________________________________________________________________________ 13
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails 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/packages.)
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:
1–647/MAX9
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0041
B
1
14 ______________________________________________________________________________________
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
1–647/MAX9
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/packages.)
______________________________________________________________________________________ 15
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
1
2
3
4
5
6
9/96
12/96
3/97
Initial release
—
1, 2, 3
1, 2, 3
1, 2, 3
2, 3, 4, 5, 6
2
Added 8-pin µMAX packages. Correct minor errors.
Added dual and quad MAX963/MAX964 packages.
7/97
Added new MAX997 and MAX999 parts.
3/99
New wafer fab/process change to CB20. Update specifications and TOCs.
Added new Current into Input Pins in the Absolute Maximum Ratings.
Added new automotive grade MAX999AAUK part and specifications.
2/07
12/07
1, 2, 3
1–647/MAX9
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.
16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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