LM2903A
36V Low Power Dual Differential Comparators
Features
Wide Single-supply Voltage Range or Dual
Supplies: +2.5 V to +36 V or ±1.25 V to ±18 V
Very Low Supply Current (150 μA/ch) Independent
of Supply Voltage(0.75 mW/comparator at +5 V)
Low Input Bias Current：4 nA typ.
Low Offset Voltage： ± 3.0 mV Max
Input Common-mode Voltage Range Includes
Ground
Internal Differential Input Voltage Range Equal to
The Supply Voltage
TTL, DTL, ECL, MOS, CMOS compatible Outputs
ESD Clamps on the Inputs Increase the
Ruggedness of the Device Without Affecting
Performance
Low Output Saturation
–40°C to 125°C Operation Range
ESD Rating：
Robust 4KV – HBM, 2KV – CDM
High Performance Drop-In Compatible With 339,
339, 2903, 2901 Series Product
Description
The devices in this series consist of dual/quad
independent single or dual supply voltage comparators
on a single monolithic substrate. The common mode
input voltage range includes ground even when operated
from a single supply, and the low power supply current
drain makes these comparators suitable for battery
operation. These types were designed to directly
interface with TTL and CMOS, Current drain is
independent of the supply voltage. The outputs can be
connected to other open-collector outputs to achieve
wired-AND relationships.
The LM2903A is dual channel version available in 8-pin
SOP package. All devices are specified for the
temperature range of –40°C to +125°C.
3PEAK and the 3PEAK logo are registered trademarks of
3PEAK INCORPORATED. All other trademarks are the
property of their respective owners.
Applications
High-speed Line or Digital Line Receivers
High Speed Sampling Circuits
Peak and Zero-crossing Detectors
Threshold Detectors/Discriminators
Sensing at Ground or Supply Line
Pin Configuration
(Top View)
Order Information
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1
LM2903A
36V Low Power Dual Differential Comparators
Model
Name
LM2903A
Order Number
LM2903AL1-SR
Package
8-Pin SOP
MSL
Level
1
Transport Media,
Quantity
Tape and Reel, 4,000
Marking Information
2903A
Thermal Information
Package
8-Pin SOP
R
θJA
112.40
R
θJC
64.12
Unit
℃/W
Absolute Maximum Ratings
Note 1
Supply Voltage: V
+
– V
–
......................................42V
Input Voltage............................. V
–
– 0.3 to V
+
+ 0.3
Input Current: +IN, –IN,
Note 2
...........................±20mA
Output Current: OUT..................................... ±20mA
Output Short-Circuit Duration
Note 3
….............. Infinite
Operating Temperature Range.........–40°C to 125°C
Maximum Junction Temperature................... 150°C
Storage Temperature Range.......... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ......... 260°C
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device reliability and lifetime.
Note 2:
The inputs are protected by ESD protection diodes to each power supply. If the input extends more than 500mV beyond the power supply,
the input current should be limited to less than 10mA.
Note 3:
A heat sink may be required to keep the junction temperature below the absolute maximum. This depends on the power supply voltage
and how many amplifiers are shorted. Thermal resistance varies with the amount of PC board metal connected to the package. The specified
values are for short traces connected to the leads.
ESD, Electrostatic Discharge Protection
Symbol
HBM
CDM
Parameter
Human Body Model ESD
Charged Device Model ESD
Condition
ANSI/ESDA/JEDEC JS-001
ANSI/ESDA/JEDEC JS-002
Minimum
Level
4
2
Unit
kV
kV
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LM2903A
36V Low Power Dual Differential Comparators
Electrical Characteristics
The
●
denotes the specifications which apply over the full operating temperature range(-40°C ~ +125°C), otherwise specifications are
at T
A
= 27°C. V
DD
= +5V, V
IN+
= V
DD
, V
IN-
= 1.4V, R
PU
=10kΩ, C
L
=15pF.
SYMBOL
V
DD
V
OS
I
B
C
IN
PARAMETER
Supply Voltage
Input Offset Voltage
Note 1
Input Bias Current
Input Capacitance
Common-mode Input Voltage
Range
Large-signal Differential-voltage
Amplification
High-level Output Current
V
OH
= 36 V, V
ID
= 1 V
●
250
V
OL
Low-Level Output Voltage
I
OL
= 4mA, V
ID
=
−1V
●
I
OL
Low-level Output Current
Quiescent Current per
Comparator
V
OL
= 1.5 V, V
ID
=
−1
V
V
CC
= 5 V
V
CC
= 36 V
100-mV input step
with 5-mV overdrive
10
150
150
2
μs
TTL-level input step
0.5
300
300
500
mV
mA
μA
μA
7
400
μA
mV
V
CC
= 5 V to MAX, V
IC
= V
ICR
(min), V
O
=
1.4V, -40°C ~ +125°C
V
DM
= 36V
Differential
Common Mode
25°C
-40°C ~ +125°C
V
CC
= 15 V, V
O
= 1.4 V to 11.4 V,
R
L
≥
15 kΩ to V
CC
V
OH
= 5 V, V
ID
= 1 V
I
OH
●
0
0
50
400
25
200
CONDITIONS
●
●
MIN
2.5
-6
±0.6
4
2.5
5
V
DD
-1.5
V
DD
-2
TYP
MAX
36
+6
UNITS
V
mV
nA
pF
V
V
V/mV
nA
V
CM
A
VD
I
Q
t
RT
Response time
R
L
connected to 5
V through 5.1 kΩ,
C
L
= 15 pF, See
Note 3
Note 1:
The input offset voltage is the average of the input-referred trip points.
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LM2903A
36V Low Power Dual Differential Comparators
Typical Performance Characteristics
V
S
= +5V, V
CM
= 0V, R
L
= Open, unless otherwise specified.
Supply Current vs. Supply Voltage
(Dual channel)
Response Time for Various Input Overdrives – Positive
Transition
240
210
6
5
4
3
Supply Current(uA)
180
150
120
90
60
30
0
3
8
13
18
23
28
Vout(V)
2
1
0
‐40°C
25°C
125°C
Vov=5mV
Vov=20mV
Vov=100mV
0
1
2
3
4
5
-1
Supply Voltage(V)
Time(us)
Response Time For Various Input Overdrives
- Negative Transition
Negative Output Swing vs. Sink Current
6
5
4
3
6
5
Vov=5mV
Vov=20mV
Vov=100mV
Vdrop(V)
4
Vout(V)
3
2
1
0
2
1
-1
0
1
2
3
4
5
0
0
10
20
30
T=‐40°C
T=25°C
T=125°C
40
Time(us)
Isink(mA)
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LM2903A
36V Low Power Dual Differential Comparators
Response Time Test Circuit
Pin Functions
–IN:
Inverting Input of the Comparator. Voltage range of this pin can go from V
–
to V
+
- 1.5V.
+IN:
Non-Inverting Input of Comparator. This pin has the same voltage range as –IN.
V+ (V
DD
):
Positive Power Supply. Typically the voltage is from 2.5V to 36V. Split supplies are possible as long as the
voltage between V+ and V– is between 2.5V and 36V. A bypass capacitor of 0.1μF as close to the part as possible
should be used between power supply pins or between supply pins and ground.
V– (V
SS
):
Negative Power Supply. It is normally tied to ground. It can also be tied to a voltage other than ground as
long as the voltage between V
+
and V
–
is from 2.5V to 36V. If it is not connected to ground, bypass it with a capacitor
of 0.1μF as close to the part as possible.
OUT:
Comparator Output. The voltage range extends to within millivolts of each supply rail.
Operation
The LM2903A family single-supply comparators feature high speed, and low power. Input signal range extends
beyond the negative and positive power supplies. The output can even extend all the way to the negative supply. The
input stage is active over different ranges of common mode input voltage. Rail-to-rail input voltage range and low-
voltage single-supply operation make these devices ideal for portable equipment.
Applications Information
Inputs
The LM2903A comparator family uses CMOS transistors at the input which prevent phase inversion when the input
pins exceed the supply voltages. Figure 1 shows an input voltage exceeding both supplies with no resulting phase
inversion.
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