MAX987-MAX996 [MAXIM]
High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators; 高速，微功耗，低电压， SOT23封装，轨到轨输入/输出比较器
| 型号： | MAX987-MAX996 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators |
| 文件： | 总12页 (文件大小：143K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1266; Rev 0b; 7/97
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
78125/MAX96
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
♦ 120ns Propagation Delay
The MAX987/MAX988/MAX991/MAX992/MAX995/
MAX996 single/dual/quad micropower comparators
♦ 48µA Quiescent Supply Current
®
feature low-voltage operation and Rail-to-Rail inputs
and outputs. Their operating voltage ranges from +2.5V
to +5.5V, making them ideal for both 3V and 5V sys-
tems. These comparators also operate with ±1.25V to
±2.75V dual supplies. They consume only 48µA per
comparator while achieving a 120ns propagation delay.
♦ +2.5V to +5.5V Single-Supply Operation
♦ Common-Mode Input Voltage Range Extends
250mV Beyond the Rails
♦ Push/Pull Output Stage Sinks and Sources
The common-mode input voltage range extends 250mV
beyond the supply rails. Input bias current is typically
1.0p A, a nd inp ut offs e t volta g e is typ ic a lly 0.5mV.
Inte rna l hyste re sis e nsure s c le a n output switc hing ,
even with slow-moving input signals.
8mA Current (MAX987/MAX991/MAX995)
♦ Open-Drain Output Voltage Extends Beyond V
CC
(MAX988/MAX992/MAX996)
♦ Unique Output Stage Reduces Output Switching
The output stage’s unique design limits supply-current
surges while switching, virtually eliminating the supply
glitches typical of many other comparators. This design
a ls o minimize s ove ra ll p owe r c ons ump tion und e r
dynamic conditions. The MAX987/MAX991/MAX995
have a push/pull output stage that sinks as well as
sources current. Large internal output drivers allow rail-
to-ra il outp ut s wing with loa d s up to 8mA. The
MAX988/MAX992/MAX996 have an open-drain output
Current, Minimizing Overall Power Consumption
♦ 100µA Supply Current at 1MHz Switching
Frequency
♦ No Phase Reversal for Overdriven Inputs
♦ Available in Space-Saving Packages:
5-Pin SOT23 (MAX987/MAX988)
8-Pin µMAX (MAX991/MAX992)
s ta g e tha t c a n b e p ulle d b e yond V
to 6V (ma x)
CC
______________Ord e rin g In fo rm a t io n
above V . These open-drain versions are ideal for
EE
level translators and bipolar to single-ended converters.
PIN-
SOT
PART
TEMP. RANGE
The single MAX987/MAX988 are available in tiny 5-pin
SOT23 packages.
PACKAGE TOP MARK
MAX987EUK-T -40°C to +85°C 5 SOT23-5
MAX987ESA -40°C to +85°C 8 SO
MAX988EUK-T -40°C to +85°C 5 SOT23-5
MAX988ESA -40°C to +85°C 8 SO
ABZB
—
_____________________S e le c t o r Gu id e
ABZC
—
COMPARATORS
PER PACKAGE
OUTPUT
STAGE
PIN-
PACKAGE
PART
Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.
8 SO/
5 SOT23-5
MAX987
MAX988
1
1
Push/Pull
8 SO/
5 SOT23-5
_________________P in Co n fig u ra t io n s
Open-Drain
MAX991
MAX992
MAX995
MAX996
2
2
4
4
Push/Pull
Open-Drain
Push/Pull
8 SO/µMAX
8 SO/µMAX
14 SO
TOP VIEW
1
2
3
5
4
V
OUT
EE
Open-Drain
14 SO
MAX987
MAX988
V
CC
________________________Ap p lic a t io n s
Portable/Battery-
Powered Systems
Threshold Detectors/
Discriminators
IN+
IN-
Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators
Ground/Supply Sensing
IR Receivers
SOT23
Pin Configurations continued at end of data sheet.
Digital Line Receivers
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
________________________________________________________________ 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 408-737-7600 ext. 3468.
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V to V ) ...................................................6V
Continuous Power Dissipation (T = +70°C)
A
CC
EE
IN_-, IN_+ to V .......................................-0.3V to (V + 0.3V)
5-Pin SOT23 (derate 7.10mW/°C above +70°C)...........571mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
8-Pin µMAX (derate 4.10mW/°C above +70°C) ............330mW
14-Pin SO (derate 8.33 mW/°C above +70°C)..............667mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
EE
CC
OUT_ to V
EE
MAX987/MAX991/MAX995 ....................-0.3V to (V + 0.3V)
CC
MAX988/MAX992/MAX996.....................................-0.3V to 6V
OUT_ Short-Circuit Duration to V or V
.......................10sec
EE
CC
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 (Note 1)
(V = +2.7V to +5.5V, V = 0V, V = 0V, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.)
CC
EE
CM
A
A
PARAMETER
SYMBOL
CONDITIONS
Inferred from PSRR test
MIN
TYP
MAX
5.5
80
UNITS
Supply Voltage
V
CC
2.5
V
T
= +25°C
53
A
V
= 5V
CC
T
A
= -40°C to +85°C
= +25°C
96
Supply Current per
Comparator
I
CC
µA
T
A
48
80
V
CC
= 2.7V
T
A
= -40°C to +85°C
96
Power-Supply Rejection Ratio
PSRR
2.5V ≤ V ≤ 5.5V
55
80
dB
V
CC
V
-
V
0.25
+
EE
CC
T
A
= +25°C
Common-Mode Voltage
Range (Note 2)
0.25
V
CMR
T
A
= -40°C to +85°C
V
EE
V
CC
T
= +25°C
±0.5
±5
Input Offset Voltage
(Note 3)
A
Full common-mode
range
V
mV
mV
nA
OS
T
A
= -40°C to +85°C
±7
Input Hysteresis
V
HYST
±2.5
Input Bias Current
(Note 4)
I
0.001
10
B
Input Offset Current
Input Capacitance
I
0.5
1.0
80
pA
pF
dB
OS
C
IN
Common-Mode Rejection Ratio CMRR
50
Output Leakage Current
(MAX988/MAX992/
MAX996 only)
I
V
OUT
= high
1.0
µA
LEAK
V
= 5V
95
35
CC
Sourcing or sinking,
= V or V
Output Short-Circuit Current
I
SC
mA
V
OUT
EE
CC
V
CC
= 2.7V
T
= +25°C
0.2
0.4
0.55
0.3
A
V
= 5V,
= 8mA
CC
I
SINK
T
A
= -40°C to +85°C
= +25°C
OUT Output Voltage Low
V
V
V
OL
T
A
0.15
4.85
2.55
V
= 2.7V,
CC
I
= 3.5mA
= 5V,
SINK
T
A
= -40°C to +85°C
= +25°C
0.4
T
A
4.6
4.45
2.4
V
CC
OUT Output Voltage High
(MAX987/MAX991/
MAX995 only)
I
= 8mA
SOURCE
T
A
= -40°C to +85°C
= +25°C
V
OH
78125/MAX96
T
A
V
CC
= 2.7V,
I
= 3.5mA
T
SOURCE
= -40°C to +85°C
2.3
A
2
_______________________________________________________________________________________
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
78125/MAX96
ELECTRICAL CHARACTERISTICS (continued)
(V = +2.7V to +5.5V, V = 0V, V = 0V, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.)
CC
EE
CM
A
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
15
MAX
UNITS
C
C
C
C
C
C
= 15pF
= 50pF
= 200pF
= 15pF
= 50pF
= 200pF
L
L
L
L
L
L
OUT Rise Time
(MAX987/MAX991/
MAX995 only)
t
V
= 5.0V
= 5.0V
20
ns
RISE
CC
40
15
OUT Fall Time
t
V
CC
20
ns
FALL
40
10mV overdrive
100mV overdrive
210
120
MAX987/MAX991/
MAX995 only
C
V
CC
= 15pF,
= 5V
L
t
PD-
MAX988/MAX992/
MAX996 only,
10mV overdrive
100mV overdrive
= 5.1kΩ
210
120
Propagation Delay
Power-Up Time
ns
µs
R
PULL-UP
10mV overdrive
100mV overdrive
210
120
25
MAX987/MAX991/MAX995
only, C = 15pF, V = 5V
t
PD+
L
CC
t
PU
Note 1: The MAX98 _EUK specifications are 100% tested at T = +25°C. Limits over the extended temperature range are guaran-
A
teed by design, not production tested.
Note 2: Inferred from the V test. Either or both inputs can be driven 0.3V beyond either supply rail without output phase reversal.
OS
Note 3:
Note 4:
V
I
B
is defined as the center of the hysteresis band at the input.
is defined as the average of the two input bias currents (I , I ).
B- B+
OS
_______________________________________________________________________________________
3
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V = 5V, V = 0V, T = +25°C, unless otherwise noted.)
CC
CM
A
SUPPLY CURRENT PER COMPARATOR
vs. TEMPERATURE
SUPPLY CURRENT PER COMPARATOR
vs. OUTPUT TRANSITION FREQUENCY
1000
100
10
90
80
70
60
50
40
30
V
IN+
> V
IN-
V
CC
= 5.5V
V
V
CC
= 5.5.V
V
= 2.5.V
= 2.5V
CC
CC
-60 -40 -20
0
20 40 60 80 100
0.01
0.1
1
10
100 1000 10,000
TEMPERATURE (°C)
OUTPUT TRANSITION FREQUENCY (kHz)
OUTPUT LOW VOLTAGE
OUTPUT HIGH VOLTAGE
vs. OUTPUT SINK CURRENT
vs. OUTPUT SOURCE CURRENT
10,000
1000
100
10
10,000
1000
V
IN+
< V
IN-
V
IN+
> V
IN-
V
CC
= 2.7V
100
10
1
V
CC
= 2.7V
V
CC
= 5.0V
V
= 5.0V
CC
0.1
1
0.1
0.01
1
10
100
0.01
0.1
1
10
100
OUTPUT SOURCE CURRENT (mA)
OUTPUT SINK CURRENT (mA)
OUTPUT SHORT-CIRCUIT
CURRENT vs. TEMPERATURE
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
120
110
100
90
1.1
0.9
V
CC
= 5.0V
0.7
80
70
0.5
60
0.3
50
40
30
20
10
0
0.1
V
= 2.7V
CC
-0.1
-0.3
78125/MAX96
-60 -40 -20
0
20 40 60 80 100
-60 -40 -20
0
20 40 60 80 100
TEMPERATURE (°C)
TEMPERATURE (°C)
4
_______________________________________________________________________________________
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
78125/MAX96
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V = 5V, V = 0V, T = +25°C, unless otherwise noted.)
CC
CM
A
PROPAGATION DELAY
vs. CAPACITIVE LOAD
PROPAGATION DELAY
vs. TEMPERATURE
10,000
1000
100
200
190
180
170
160
150
140
130
120
110
100
V
OD
= 50mV
V
OD
= 50mV
V
CC
= 2.5.V
V
CC
= 5.5.V
0.01
0.1
1
10
100
1000
-60 -40 -20
0
20 40 60 80 100
CAPACITIVE LOAD (nF)
TEMPERATURE (°C)
MAX987/MAX991/MAX995
PROPAGATION DELAY
vs. INPUT OVERDRIVE
PROPAGATION DELAY (t
)
PD+
MAX987-11
300
250
200
150
V
OD
= 50mV
50mV/
div
IN+
V
= 2.5V
= 5.5V
CC
V
CC
100
50
2V/div
OUT
0
20
40
80 100
100ns/div
0
60
120 140
INPUT OVERDRIVE (mV)
MAX987/MAX991/MAX995
SWITCHING CURRENT, OUT RISING
PROPAGATION DELAY (t
)
PD-
MAX987-12
MAX987-13
V
OD
= 50mV
50mV/
div
50mV/
div
IN+
IN+
2V/div
OUT
2V/div
OUT
2mA/div
I
CC
V
OD
= 50mV
100ns/div
200ns/div
_______________________________________________________________________________________
5
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
____________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V = 5V, V = 0V, T = +25°C, unless otherwise noted.)
CC
CM
A
1MHZ RESPONSE
SWITCHING CURRENT, OUT FALLING
MAX987-15
MAX987-14
V
OD
= 50mV
50mV/
div
50mV/
div
IN+
IN+
OUT
2V/div
OUT
2V/div
I
CC
2mA/div
V
OD
= 50mV
200ns/div
200ns/div
POWER-UP DELAY
MAX987-16
V
V
IN+
= 50mV
= 0V
IN-
2V/div
V
CC
2V/div
OUT
5µs/div
78125/MAX96
6
_______________________________________________________________________________________
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
78125/MAX96
______________________________________________________________P in De s c rip t io n
PIN
MAX987
MAX988
MAX991
MAX996
MAX995
MAX996
NAME
FUNCTION
SOT23-5
SO
6
SO/µMAX
SO
—
4
1
—
8
OUT
Comparator Output
2
7
V
CC
Positive Supply Voltage
3
3
—
—
4
—
—
11
1
IN+
IN-
Comparator Noninverting Input
Comparator Inverting Input
Negative Supply Voltage
4
2
5
4
V
EE
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1, 5, 8
1
OUTA
INA-
Comparator A Output
2
2
Comparator A Inverting Input
Comparator A Noninverting Input
Comparator B Noninverting Input
Comparator B Inverting Input
Comparator B Output
3
3
INA+
INB+
INB-
5
5
6
6
7
7
OUTB
OUTC
INC-
—
—
—
—
—
—
—
8
Comparator C Output
9
Comparator C Inverting Input
Comparator C Noninverting Input
Comparator D Noninverting Input
Comparator D Inverting Input
Comparator D Output
10
12
13
14
—
INC+
IND+
IND-
OUTD
N.C.
No Connection. Not internally connected.
_______________________________________________________________________________________
7
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
_______________De t a ile d De s c rip t io n
__________Ap p lic a t io n s In fo rm a t io n
The MAX987/MAX988/MAX991/MAX992/MAX995/
MAX996 are single/dual/quad low-power, low-voltage
comparators. They have an operating supply voltage
range between +2.5V and +5.5V and consume only
48µA per comparator, while achieving 120ns propaga-
tion delay. Their common-mode input voltage range
extends 0.25V beyond each rail. Internal hysteresis
ensures clean output switching, even with slow-moving
input signals. Large internal output drivers allow rail-to-
rail output swing with up to 8mA loads.
Ad d it io n a l Hys t e re s is
MAX987/MAX991/MAX995
The MAX987/MAX991/MAX995 have ±2.5mV internal
hysteresis. Additional hysteresis can be generated with
thre e re s is tors us ing p os itive fe e d b a c k (Fig ure 1).
Unfortuna te ly, this me thod a ls o s lows hys te re s is
response time. Use the following procedure to calcu-
late resistor values for the MAX987/MAX991/MAX995.
1) Select R3. Leakage current at IN is under 10nA;
therefore, the current through R3 should be at least
1µA to minimize errors caused by leakage current.
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. The MAX987/MAX991/MAX995 have a
push/pull output structure that sinks as well as sources
current. The MAX988/MAX992/MAX996 have an open-
The current through R3 at the trip point is (V
-
REF
V
) / R3. Considering the two possible output
OUT
states and solving for R3 yields two formulas: R3 =
/ 1µA or R3 = (V - V ) / 1µA. Use the
V
REF
REF
CC
s ma lle r of the two re s ulting re s is tor va lue s . For
example, if V = 1.2V and V = 5V, then the two
drain output stage that can be pulled beyond V to an
CC
REF
CC
absolute maximum of 6V above V
.
EE
R3 resistor values are 1.2MΩ and 3.8MΩ. Choose a
1.2MΩ standard value for R3.
In p u t S t a g e Circ u it ry
The devices’ input common-mode range extends from
2) Choose the hysteresis band required (V ). For this
HB
-0.25V to (V + 0.25V). These comparators may oper-
CC
example, choose 50mV.
ate at any differential input voltage within these limits.
Input bias current is typically 1.0pA if the input voltage
is between the supply rails. Comparator inputs are pro-
tected from overvoltage by internal body diodes con-
nected to the supply rails. As the input voltage exceeds
the supply rails, these body diodes become forward
biased and begin to conduct. Consequently, bias cur-
re nts inc re a s e e xp one ntia lly a s the inp ut volta g e
exceeds the supply rails.
3) Calculate R1 according to the following equation:
R1 = R3 x (V / V
)
HB
CC
For this example, insert the values R1 = 1.2MΩ x
(50mV / 5V) = 12kΩ.
4) Choose the trip point for V rising (V
; V
is
IN
THR
THF
the trip point for V falling). This is the threshold
IN
voltage at which the comparator switches its output
from low to high as V rises above the trip point. For
IN
Ou t p u t S t a g e Circ u it ry
The s e c omp a ra tors c onta in a uniq ue outp ut s ta g e
capable of rail-to-rail operation with up to 8mA loads.
Many comparators consume orders of magnitude more
current during switching than during steady-state oper-
ation. However, with this family of comparators, the
supply-current change during an output transition is
extremely small. The Typical Operating Characteristics
graph Supply Current vs. Output Transition Frequency
shows the minimal supply-current increase as the out-
put switching frequency approaches 1MHz. This char-
acteristic eliminates the need for power-supply filter
capacitors to reduce glitches created by comparator
switching currents. Battery life increases substantially
in high-speed, battery-powered applications.
this example, choose 3V.
V
CC
R3
R1
0.1µF
V
IN
V
CC
OUT
R2
V
EE
MAX987
MAX991
MAX995
V
REF
78125/MAX96
Figure 1. Additional Hysteresis (MAX987/MAX991/MAX995)
8
_______________________________________________________________________________________
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
78125/MAX96
5) Calculate R2 as shown. For this example, choose an
Us e the following p roc e d ure to c a lc ula te re s is tor
values:
8.2kΩ standard value:
1
1) Select R3 according to the formulas R3 = V
/ 1µA
REF
R2 =
or R3 = (V
- V ) / 1µA - R4. Use the smaller of
REF
CC
V
1
1
THR
x R1
−
−
the two resulting resistor values.
V
R1
R3
REF
2) Choose the hysteresis band required (V ). For this
HB
1
example, choose 50mV.
R2 =
= 8.03kΩ
3.0V
1.2 x 12kΩ
1
1
3) Calculate R1 according to the following equation:
−
−
12kΩ
2.2MΩ
R1 = (R3 + R4) x (V / V
)
HB
CC
6) Verify trip voltages and hysteresis as follows:
4) Choose the trip point for V rising (V
; V
is
IN
THR
THF
the trip point for V falling). This is the threshold
IN
voltage at which the comparator switches its output
1
1
1
from low to high as V rises above the trip point.
IN
V
rising : V
= V x R1 x
REF
+
+
IN
THR
R1
R2
R3
5) Calculate R2 as follows:
R1 x V
CC
1
V
falling : V
= V
−
IN
THF
THR
R2 =
R3
V
1
1
THR
x R1
−
−
Hysteresis = V
− V
THF
V
R1
R3 + R4
THR
REF
6) Verify trip voltages and hysteresis as follows:
MAX988/MAX992/MAX996
The MAX988/MAX992/MAX996 have ±2.5mV internal
hysteresis. They have open-drain outputs and require
an external pull-up resistor (Figure 2). Additional hys-
teresis can be generated using positive feedback, but
the formula s d iffe r s lig htly from thos e of the
MAX987/MAX991/MAX995.
V
rising : V
= V x R1 x
REF
IN
THR
1
1
1
+
+
R1
R2
R3 + R4
R1 x V
CC
V
falling : V
= V
−
IN
THF
THR
R3 + R4
Hysteresis = V
− V
THF
THR
V
CC
R3
Circ u it La yo u t a n d Byp a s s in g
The s e c omp a ra tors ’ hig h-g a in b a nd wid th re q uire s
design precautions to maximize their high-speed capa-
bility. The recommended precautions are:
0.1µF
R4
R1
V
IN
V
CC
1) Use a printed circuit board with an unbroken, low-
inductance ground plane.
OUT
R2
V
EE
2) Place a decoupling capacitor (a 0.1µF ceramic
MAX988
MAX992
MAX996
capacitor is a good choice) as close to V
as
CC
V
REF
possible.
3) On the inputs and outputs, keep lead lengths short
to avoid unwanted parasitic feedback around the
comparators.
4) Solder the devices directly to the printed circuit
board instead of using a socket.
Figure 2. Additional Hysteresis (MAX988/MAX992/MAX996)
_______________________________________________________________________________________
9
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
Ze ro -Cro s s in g De t e c t o r
Figure 3 shows a zero-crossing detector application.
The MAX987’s inverting input is connected to ground,
and its noninverting input is connected to a 100mVp-p
signal source. As the signal at the noninverting input
crosses 0V, the comparator’s output changes state.
Lo g ic -Le ve l Tra n s la t o r
Figure 4 shows an application that converts 5V logic lev-
els to 3V logic levels. The MAX988 is powered by the +5V
supply voltage, and the pull-up resistor for the MAX988’s
open-drain output is connected to the +3V supply volt-
age. This configuration allows the full 5V logic swing with-
out creating overvoltage on the 3V logic inputs. For 3V to
5V logic-level translation, simply connect the +3V supply
to V and the +5V supply to the pull-up resistor.
CC
+5V (+3V)
V
CC
0.1µF
0.1µF
+3V (+5V)
2
2
100k
V
CC
V
CC
100mV
R
PULL-UP
4
3
IN+
IN-
4
3
IN-
1
OUT
3V (5V)
LOGIC OUT
1
OUT
100k
IN+
MAX987
MAX988
V
EE
V
EE
5
5
5V (3V) LOGIC IN
Figure 3. Zero-Crossing Detector
Figure 4. Logic-Level Translator
_____________________________________________P in Co n fig u ra t io n s (c o n t in u e d )
TOP VIEW
OUTA
INA-
1
2
3
4
5
6
7
14 OUTD
13 IND-
12 IND+
N.C.
IN-
1
2
3
4
8
7
6
5
N.C.
OUTA
INA-
1
2
3
4
8
7
6
5
V
CC
V
CC
OUTB
INB-
MAX987
MAX988
MAX991
MAX992
INA+
OUT
N.C.
IN+
INA+
V
CC
11
V
EE
MAX995
MAX996
V
EE
V
EE
INB+
INB+
INB-
10 INC+
9
8
INC-
SO
SO/µMAX
OUTB
OUTC
78125/MAX96
SO
10 ______________________________________________________________________________________
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
78125/MAX96
________Typ ic a l Ap p lic a t io n Circ u it
_Ord e rin g In fo rm a t io n (c o n t in u e d )
V
CC
PIN-
SOT
PART
TEMP. RANGE
PACKAGE TOP MARK
MAX991ESA
MAX991EUA
MAX992ESA
MAX992EUA
MAX995ESD
MAX996ESD
-40°C to +85°C 8 SO
-40°C to +85°C 8 µMAX
-40°C to +85°C 8 SO
-40°C to +85°C 8 µMAX
-40°C to +85°C 14 SO
-40°C to +85°C 14 SO
—
—
—
—
—
—
V
IN
0.1µF
V
CC
*R
PULL-UP
IN+
IN-
OUT
MAX98_
MAX99_
V
EE
V
REF
* MAX988/MAX992/MAX996 ONLY
THRESHOLD DETECTOR
__________________________________________________Ta p e -a n d -Re e l In fo rm a t io n
4.0 ±0.1
1.0 ±0.1
1.75 ±0.1
2.0 ±0.05
1.5 +0.1/-0.0 DIAMETER
A
3.5 ±0.05
8.0 ±0.3
2.2 ±0.1
0.5 RADIUS
TYPICAL
A0
1.0 MINIMUM
4.0 ±0.1
A
Bo
Ao = 3.1mm ±0.1
Bo = 2.7mm ±0.1
Ko = 1.2mm ±0.1
NOTE: DIMENSIONS ARE IN MM.
AND FOLLOW EIA481-1 STANDARD.
Ko
0.30 ±0.05
0.8 ±0.05
0.30R MAX.
______________________________________________________________________________________ 11
Hig h -S p e e d , Mic ro p o w e r, Lo w -Vo lt a g e ,
S OT2 3 , Ra il-t o -Ra il I/O Co m p a ra t o rs
________________________________________________________P a c k a g e In fo rm a t io n
78125/MAX96
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 ____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1997 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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