Maxim LMX331HAUK-T General-purpose, low-voltage, single/dual/quad, tiny-pack comparator Datasheet

19-1958; Rev 2; 1/02
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
Features
♦ Guaranteed 1.8V to 5.5V Performance
♦ -40°C to +125°C Automotive Temperature Range
♦ Low Supply Current (60µA/Comparator at
VDD = 5.0V)
♦ Input Common-Mode Voltage Range Includes
Ground
♦ No Phase Reversal for Overdriven Inputs
♦ Low Output Saturation Voltage (100mV)
♦ Internal 2mV Hysteresis
(LMX331H/LMX393H/LMX339H)
♦ 5-Pin SC70 Space-Saving Package
(2.0mm ✕ 2.1mm ✕ 1.0mm)
(LMX331/LMX331H)
The LMX331/LMX393/LMX339 offer performance
advantages such as wider supply voltage range, wider
operating temperature range, better CMRR and PSRR,
improved response time characteristics, reduced offset, reduced output saturation voltage, reduced input
bias current, and improved RF immunity.
Ordering Information
PART
PINPACKAGE
TEMP RANGE
-40°C to +125°C
LMX331AXK-T
5 SC70-5
TOP
MARK
ACD
LMX331AUK-T
-40°C to +125°C
5 SOT23-5
LMX331HAXK-T
-40°C to +125°C
5 SC70-5
LMX331HAUK-T
-40°C to +125°C
5 SOT23-5
ADQS
LMX393AKA-T
-40°C to +125°C
8 SOT23-8
AAIF
Mobile Communications
Notebooks and PDAs
LMX393AUA
-40°C to +125°C
8 µMAX
LMX393HAKA-T
-40°C to +125°C
8 SOT23-8
Automotive Applications
Battery-Powered Electronics
General-Purpose Portable Devices
General-Purpose Low-Voltage Applications
LMX393HAUA
-40°C to +125°C
8 µMAX
—
LMX339AUD
-40°C to +125°C
14 TSSOP
—
LMX339ASD
-40°C to +125°C
14 SO
—
LMX339HAUD
-40°C to +125°C
14 TSSOP
—
LMX339HASD
-40°C to +125°C
14 SO
—
Applications
ADQR
ACE
—
AAIG
Pin Configurations
TOP VIEW
OUTB 1
LMX331/LMX331H
IN+
1
5 VDD
VSS 2
1
INA-
2
4 OUT
VSS
LMX393/LMX393H
A
3
4
VDD
7
OUTB
6
B
5
INBINB+
VDD 3
INA- 4
12 VSS
A
D
INB+ 7
11 IND+
10 IND-
INA+ 5
INB- 6
SOT23/µMAX
SC70/SOT23
8
14 OUTC
13 OUTD
OUTA 2
OUTA
INA+
IN- 3
LMX339/LMX339H
B
C
9
INC+
8
INC-
TSSOP/SO
________________________________________________________________ Maxim Integrated Products
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.
1
LMX331/LMX393/LMX339
General Description
The LMX331/LMX393/LMX339 single/dual/quad comparators are drop-in, pin-for-pin-compatible replacements for the LMV331/LMV393/LMV339. The LMX331H/
LMX393H/LMX339H offer the performance of the
LMX331/LMX393/LMX339 with the added benefit of internal hysteresis to provide noise immunity, preventing output oscillations even with slow-moving input signals.
Advantages of the LMX331/LMX393/LMX339 series
include low supply voltage, small package, and low cost.
The LMX331 is available in both 5-pin SC70 and SOT23
packages, LMX393 is available in both 8-pin µMAX and
smaller SOT23 packages, and the LMX339 is available in
14-pin TSSOP and SO packages. They are manufactured using advanced submicron CMOS technology.
Designed with the most modern techniques, the
LMX331/LMX393/LMX339 achieve superior performance
over BiCMOS or bipolar versions on the market.
LMX331/LMX393/LMX339
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VDD to VSS)...................................-0.3V to +6V
All Other Pins .................................. (VSS - 0.3V) to (VDD + 0.3V)
Continuous Power Dissipation (TA = +70°C)
5-Pin SC70 (derate 3.1mW/°C above +70°C) ..............247mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
8-Pin µMAX (derate 10.3mW/°C above +70°C) ...........825mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C) .........727mW
14-Pin SO (derate 8.3mW/°C above +70°C).............666.7mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+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.
DC ELECTRICAL CHARACTERISTICS—2.7V OPERATION
(VDD = 2.7V, VSS = 0, VCM = 0, RL = 5.1kΩ connected to VDD. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Input Offset Voltage
SYMBOL
CONDITIONS
MIN
VOS
Input Voltage Hysteresis
VHYST
Input Offset Voltage Average
Temperature Drift
TCVOS
LMX331H/LMX393H/LMX339H only
TA = +25°C
Input Bias Current
IB
Input Voltage Range
Voltage Gain
Output Saturation Voltage
Output Sink Current
IOS
AV
IO
IS
mV
mV
5
µV/°C
±250
±400
±400
±0.05
nA
±50
TA = -40°C to +85°C
±150
TA = -40°C to +125°C
±150
-0.1
nA
V
2.0
LMX331/LMX393/LMX339 only
50
V/mV
ISINK ≤ 1mA
50
mV
VO ≤ 1.5V
5
37
50
mA
100
LMX393/LMX393H (both comparators)
70
140
LMX339/LMX339H (all four comparators)
140
200
TA = +25°C
Output Leakage Current
UNITS
2
TA = -40°C to +125°C
LMX331/LMX331H
Supply Current (Note 2)
7
TA = -40°C to +85°C
VCM
VSAT
MAX
0.2
±0.05
TA = +25°C
Input Offset Current
TYP
µA
0.003
TA = -40°C to +85°C
1
TA = -40°C to +125°C
2
µA
AC ELECTRICAL CHARACTERISTICS—2.7V OPERATION
(VDD = 2.7V, VSS = 0, VCM = 0, RL = 5.1kΩ connected to VDD. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Propagation Delay
Output High to Low
tPHL
Propagation Delay
Output Low to High
tPLH
2
CONDITIONS
MIN
TYP
Input overdrive = 10mV (Note 3)
500
Input overdrive = 100mV (Note 3)
100
Input overdrive = 10mV (Note 3)
500
Input overdrive = 100mV (Note 3)
100
_______________________________________________________________________________________
MAX
UNITS
ns
ns
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
(VDD = 5V, VSS = 0, VCM = 0, RL = 5.1kΩ connected to VDD. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TA = +25°C
Input Offset Voltage
VOS
Input Voltage Hysteresis
Input Offset Voltage Average
Temperature Drift
9
9
TCVOS
Input Voltage Range
Voltage Gain
IOS
AV
Output Sink Current
VSAT
IO
±0.05
±150
TA = -40°C to +125°C
±150
-0.1
ISINK ≤ 4mA
TA = -40°C to +85°C
700
700
10
LMX339/LMX339H
(all four comparators)
73
60
120
150
TA = -40°C to +125°C
170
TA = +25°C
100
200
TA = -40°C to +85°C
250
TA = -40°C to +125°C
300
TA = +25°C
170
mV
mA
TA = -40°C to +85°C
µA
300
TA = -40°C to +85°C
350
TA = -40°C to +125°C
430
TA = +25°C
Output Leakage Current
V/mV
400
TA = -40°C to +125°C
VO ≤ 1.5V
LMX393/LMX393H
(both comparators)
50
70
nA
V
4.2
20
nA
±50
TA = -40°C to +85°C
TA = +25°C
IS
±250
±400
LMX331/LMX331H
Supply Current (Note 2)
µV/°C
±400
TA = +25°C
Output Saturation Voltage
5
TA = -40°C to +125°C
LMX331/LMX393/LMX339 only
mV
mV
TA = -40°C to +85°C
VCM
UNITS
2
±0.05
TA = +25°C
Input Offset Current
7
TA = -40°C to +125°C
LMX331H/LMX393H/LMX339H only
IB
MAX
TA = -40°C to +85°C
TA = +25°C
Input Bias Current
TYP
0.25
0.003
TA = -40°C to +85°C
1
TA = -40°C to +125°C
2
µA
AC ELECTRICAL CHARACTERISTICS—5.0V OPERATION
(VDD = 5V, VSS = 0, VCM = 0, RL = 5.1kΩ connected to VDD. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Propagation Delay
Output High to Low
tPHL
Propagation Delay
Output Low to High
tPLH
CONDITIONS
MIN
TYP
Input overdrive = 10mV (Note 3)
400
Input overdrive = 100mV (Note 3)
90
Input overdrive = 10mV (Note 3)
600
Input overdrive = 100mV (Note 3)
200
MAX
UNITS
ns
ns
_______________________________________________________________________________________
3
LMX331/LMX393/LMX339
DC ELECTRICAL CHARACTERISTICS—5.0V OPERATION
LMX331/LMX393/LMX339
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
DC ELECTRICAL CHARACTERISTICS—1.8V OPERATION
(VDD = 1.8V, VSS = 0, VCM = 0, RL = 5.1kΩ connected to VDD. Typical values are at TA = +25°C.)
PARAMETER
Input Offset Voltage
SYMBOL
Input Voltage Hysteresis
Input Offset Voltage Average
Temperature Drift
Input Bias Current
Input Offset Current
Input Voltage Range
CONDITIONS
MIN
VOS
LMX331H/LMX393H/LMX339H only
TYP
MAX
0.2
5
UNITS
mV
2
mV
TCVOS
5
µV/°C
IB
0.05
nA
IOS
0.05
nA
-0.1
VCM
Output Saturation Voltage
VSAT
ISINK ≤ 1mA
Power-Supply Rejection Ratio
PSRR
VDD = 1.8V to 5.5V
Output Sink Current
IO
Supply Current (Note 2)
IS
V
1
35
60
VO ≤ 1.5V
mV
70
dB
15
mA
LMX331/LMX331H
40
LMX393/LMX393H (both comparators)
65
140
LMX339/LMX339H (all four comparators)
120
200
Output Leakage Current
100
0.003
µA
µA
AC ELECTRICAL CHARACTERISTICS—1.8V OPERATION
(VDD = 1.8V, VSS = 0, VCM = 0, RL = 5.1kΩ connected to VDD. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
Propagation Delay
Output High to Low
tPHL
Propagation Delay
Output Low to High
tPLH
CONDITIONS
MIN
TYP
Input overdrive = 10mV (Note 3)
500
Input overdrive = 100mV (Note 3)
100
Input overdrive = 10mV (Note 3)
500
Input overdrive = 100mV (Note 3)
100
Note 1: All devices are production tested at +25°C. All temperature limits are guaranteed by design.
Note 2: Supply current when output is high.
Note 3: Input overdrive is the overdrive voltage beyond the offset and hysteresis-determined trip points.
4
_______________________________________________________________________________________
MAX
UNITS
ns
ns
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
70
60
50
40
TA = +25°C
TA = -40°C
20
10
TA = +85°C
140
120
100
80
TA = +25°C
60
TA = -40°C
40
20
VOUT = HIGH
VOUT = LOW
2
3
4
5
1
6
2
3
SUPPLY VOLTAGE (V)
OUTPUT LOW VOLTAGE vs. SINK CURRENT
LMX331 toc04
80
VDD = 1.8V
60
VDD = 5.0V
IOUT = 4mA
0
110
100
90
80
100
75
tPHL
50
0
20
25
40
60
80
60
TEMPERATURE (°C)
80
100 120
60
80
100 120
400
tPLH
300
200
tPHL
0
40
60
80
100
PROPAGATION DELAY
vs. INPUT OVERDRIVE (tPLH)
PROPAGATION DELAY
vs. INPUT OVERDRIVE (tPHL)
400
TA = -40°C
350
TA = +25°C
300
250
200
TA = +85°C
180
TA = -40°C
160
140
TA = +25°C
120
100
TA = +125°C
80
60
TA = +85°C
40
TA = +125°C
120
200
LMX331 toc08
450
150
20
CAPACITIVE LOAD (pF)
20
0
40
40
500
100 120
50
0
20
TEMPERATURE (°C)
100
20
0
PROPAGATION DELAY vs. CAPACITIVE LOAD
PROPAGATION DELAY (ns)
tPLH
-20
500
PROPAGATION DELAY (ns)
150
0
-20
0
-40
4
LMX331 toc07
175
-20
VDD = 1.8V
100
PROPAGATION DELAY vs. TEMPERATURE
-40
-0.5
600
60
2
3
SINK CURRENT (mA)
125
VDD = 2.7V
TEMPERATURE (°C)
70
1
0
-40
PROPAGATION DELAY (ns)
VDD = 2.7V
0
VDD = 5.0V
6
OUTPUT LOW VOLTAGE vs. TEMPERATURE
20
PROPAGATION DELAY (ns)
5
120
OUTPUT LOW VOLTAGE (mV)
OUTPUT LOW VOLTAGE (mV)
120
40
0.5
SUPPLY VOLTAGE (V)
140
100
4
LMX331 toc05
1
1.0
-1.0
0
0
LMX331 toc03
160
1.5
LMX331 toc06
30
TA = +125°C
INPUT OFFSET VOLTAGE (mV)
TA = +85°C
SUPPLY CURRENT (µA)
SUPPLY CURRENT (µA)
80
LMX331 toc02
TA = +125°C
90
180
LMX331 toc01
100
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
LMX331
SUPPLY CURRENT vs. SUPPLY VOLTAGE
LMX331 toc09
LMX331
SUPPLY CURRENT vs. SUPPLY VOLTAGE
0
0
25
50
75
100
INPUT OVERDRIVE (mV)
125
150
0
25
50
75
100
125
150
INPUT OVERDRIVE (mV)
_______________________________________________________________________________________
5
LMX331/LMX393/LMX339
Typical Operating Characteristics
(VDD = 5V, VSS = 0, VCM = 0, RL = 5.1kΩ, CL = 10pF, overdrive = 100mV, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VDD = 5V, VSS = 0, VCM = 0, RL = 5.1kΩ, CL = 10pF, overdrive = 100mV, TA = +25°C, unless otherwise noted.)
HYSTERESIS (mV)
4
2.0
1.5
1.0
0
(IN-) - IN+
100mV/div
3
2
1
0.5
OUT
2V/div
0
20
40
60
80
100 120
1
2
3
4
SUPPLY VOLTAGE (V)
PROPAGATION DELAY
10mV OVERDRIVE
500kHz RESPONSE
100mV OVERDRIVE
(IN-) - IN+
10mV/div
OUT
2V/div
5
6
(IN-) - IN+
100mV/div
TIME (200ns/div)
500kHz RESPONSE
10mV OVERDRIVE
LMX331 toc14
TEMPERATURE (°C)
LMX331 toc15
0
(IN-) - IN+
10mV/div
OUT
2V/div
OUT
2V/div
TIME (500ns/div)
100kHz RESPONSE
100mV OVERDRIVE
100kHz RESPONSE
10mV OVERDRIVE
POWER-UP RESPONSE
(IN-) - IN+
100mV/div
OUT
2V/div
(IN-) - IN+
10mV/div
VDD
2V/div
OUT
2V/div
OUT
2V/div
TIME (2µs/div)
LMX331 toc18
TIME (500ns/div)
LMX331 toc16
TIME (200ns/div)
LMX331 toc17
-20
LMX331 toc13
-40
6
LMX331 toc11
2.5
PROPAGATION DELAY
100mV OVERDRIVE
5
LMX331 toc10
3.0
LMX331H/LMX393H/LMX339H
HYSTERESIS vs. SUPPLY VOLTAGE
LMX331 toc12
LMX331H/LMX393H/LMX339H
HYSTERESIS vs. TEMPERATURE
HYSTERESIS (mV)
LMX331/LMX393/LMX339
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
TIME (2µs/div)
TIME (1µs/div)
_______________________________________________________________________________________
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
LMX331
1
2
3
4
5
—
—
—
—
—
—
—
—
—
—
—
—
PIN
LMX393
—
4
—
—
8
1
7
2
3
5
6
—
—
—
—
—
—
LMX339
—
12
—
—
3
2
1
4
5
7
6
8
9
10
11
13
14
NAME
IN+
VSS
INOUT
VDD
OUTA
OUTB
INAINA+
INB+
INBINCINC+
INDIND+
OUTD
OUTC
FUNCTION
Noninverting Input
Negative Supply (Connect to GND)
Inverting Input
Comparator Output (Open-Drain)
Positive Supply
Comparator A Output (Open-Drain)
Comparator B Output (Open-Drain)
Comparator A Inverting Input
Comparator A Noninverting Input
Comparator B Noninverting Input
Comparator B Inverting Input
Comparator C Inverting Input
Comparator C Noninverting Input
Comparator D Inverting Input
Comparator D Noninverting Input
Comparator D Output (Open-Drain)
Comparator C Output (Open-Drain)
Detailed Description
The LMX331/LMX393/LMX339 are single/dual/quad,
low-cost, general-purpose comparators. They have a
single-supply operating voltage of 1.8V to 5V. The common-mode input range extends from -0.1V below the
negative supply to within 0.7V of the positive supply.
They require approximately 60µA per comparator with
a 5V supply and 40µA with a 2.7V supply.
The LMX331H/LMX393H/LMX339H have 2mV of hysteresis for noise immunity. This significantly reduces the
chance of output oscillations even with slow-moving
input signals. The LMX331/LMX393/LMX339 and
LMX331H/LMX393H/LMX339H are ideal for automotive
applications because they operate from -40°C to
+125°C (see Typical Operating Characteristics).
Applications Information
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 to move quickly past the other,
thus taking the input out of the region where oscillation
occurs. This provides clean output transitions for noisy,
slow-moving input signals.
Additional hysteresis can be generated with two resistors, using positive feedback (Figure 2). Use the following procedure to calculate resistor values:
THRESHOLDS
IN+
INVHYST
HYSTERESIS
BAND
VTH
VTL
Hysteresis
Many comparators oscillate in the linear region of operation because of noise or undesired parasitic feedback. This tends to occur when the voltage on one
input is equal or very close to the voltage on the other
input. The LMX331H/LMX393H/LMX339H have internal
hysteresis to counter parasitic effects and noise.
The hysteresis in a comparator creates two trip points:
one for the rising input voltage and one for the falling
OUT
Figure 1. Threshold Hysteresis Band (Not to Scale)
_______________________________________________________________________________________
7
LMX331/LMX393/LMX339
Pin Description
LMX331/LMX393/LMX339
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
VDD
RL
R1
VDD
R2
VREF
IN+
OUT
VIN
VOUT
IN-
where R1 ≈ 100kΩ, VTH = 2.525V, and VTL = 2.475V.
Choose R1 and R2 to be large enough as not to exceed
the amount of current the reference can supply.
The source current required is VREF / (R1 + R2).
The sink current is (VOUT(HIGH) - VREF) ✕ (R1 + R2).
Choose RL to be large enough to avoid drawing excess
current, yet small enough to supply the necessary current to drive the load. RL should be between 1kΩ and
10kΩ.
Board Layout and Bypassing
LMX331
VSS
Figure 2. Adding Hysteresis with External Resistors
1) Find output voltage when output is high:
VOUT(HIGH) = VDD - ILOAD ✕ RL
2) Find the trip points of the comparator using these
formulas:
VTH = VREF + ((VOUT(HIGH) - VREF)R2) / (R1 + R2)
VTL = VREF(1 - (R2 / (R1 + R2)))
where VTH is the threshold voltage at which the comparator switches its output from high to low as VIN rises
above the trip point, and VTL is the threshold voltage at
which the comparator switches its output from low to
high as VIN drops below the trip point.
3) The hysteresis band will be:
Use 0.1µF bypass capacitors from VDD to VSS. To maximize performance, minimize stray inductance by
putting this capacitor close to the VDD pin and reducing trace lengths. For slow-moving input signals (rise
time > 1ms), use a 1nF capacitor between IN+ and INto reduce high-frequency noise.
Chip Information
LMX331/LMX331H TRANSISTOR COUNT: 112
LMX393/LMX393H TRANSISTOR COUNT: 211
LMX339/LMX339H TRANSISTOR COUNT: 411
VHYST = VTH - VTL = VDD(R2 / (R1 + R2))
In this example, let VDD = 5V, VREF = 2.5V, ILOAD =
50nA, RL = 5.1kΩ:
VOUT(HIGH) = 5.0V - (50 ✕ 10-9 ✕ 5.1 ✕ 103Ω) ≈ 5.0V
VTH = 2.5V + 2.5V(R2 / (R1 + R2))
VTL = 2.5V(1 - (R2 / (R1 + R2)))
Select R2. In this example, we will choose 1kΩ.
Select VHYST. In this example, we will choose 50mV.
Solve for R1:
VHYST = VOUT(HIGH)(R2 / (R1 + R2)) V
0.050V = 5(1000 / (R1 + 1000)) V
8
_______________________________________________________________________________________
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
SC70, 5L.EPS
SOT5L.EPS
_______________________________________________________________________________________
9
LMX331/LMX393/LMX339
Package Information
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
8LUMAXD.EPS
SOT23, 8L.EPS
LMX331/LMX393/LMX339
Package Information (continued)
10
______________________________________________________________________________________
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
TSSOP,NO PADS.EPS
______________________________________________________________________________________
11
LMX331/LMX393/LMX339
Package Information (continued)
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
SOICN.EPS
LMX331/LMX393/LMX339
Package Information (continued)
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 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2002 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.