LM2903
Low-power dual voltage comparator
Datasheet
-
production data
•
TTL, DTL, ECL, MOS, CMOS compatible
outputs
•
Automotive qualification
N
DIP8
(plastic package)
D
SO8
(plastic
micropackage)
Related products
•
See LM2903W for similar device with higher
ESD performances
•
See LM2903H for similar device with operating
temperature up to 150 °C
Description
P
TSSOP8
(thin shrink small
outline package)
S
MiniSO8
(plastic
micropackage)
This device consists of two independent low-
power voltage comparators designed specifically
to operate from a single supply over a wide range
of voltages. Operation from split power supplies is
also possible.
In addition, the device has a unique characteristic
in that the input common-mode voltage range
includes the negative rail even though operated
from a single power supply voltage.
DFN8 2x2 mm
(plastic micropackage)
Features
•
Wide single supply voltage range or dual
supplies +2 V to +36 V or ±1 V to ±18 V
•
Very low supply current (0.4 mA) independent
of supply voltage (1 mW/comparator at +5 V)
•
Low input bias current: 25 nA typ.
•
Low input offset current: ±5 nA typ.
•
Input common-mode voltage range includes
negative rail
•
Low output saturation voltage:
250 mV typ. (I
O
= 4 mA)
•
Differential input voltage range equal to the
supply voltage
November 2013
This is information on a product in full production.
DocID2470 Rev 11
1/19
www.st.com
Contents
LM2903
Contents
1
2
3
4
5
6
Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Package pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical application schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1
6.2
6.3
6.4
6.5
DIP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
SO8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
TSSOP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
MiniSO8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DFN8 2x2 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7
8
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2/19
DocID2470 Rev 11
LM2903
Schematic diagram
1
Schematic diagram
Figure 1. Schematic diagram (1/2 LM2903)
3.5
μA
100
μA
3.5
μA
100
μA
Non-inverting
input
Inverting
input
2
Package pin connections
Figure 2. Pin connections for each package (top view)
DIP8 / SO8 / TSSOP8 / MiniSO8 / DFN8
DocID2470 Rev 11
3/19
19
Absolute maximum ratings and operating conditions
LM2903
3
Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings
Symbol
V
CC
V
id
V
in
Supply voltage
Differential input voltage
Input voltage
Output short-circuit to ground
(1)
Thermal resistance junction to ambient
(2)
DIP8
SO8
TSSOP8
MiniSO8
DFN8 2x2 mm
Thermal resistance junction to case
(2)
DIP8
SO8
TSSOP8
MiniSO8
DFN8 2x2 mm
Maximum junction temperature
Storage temperature range
Human body model (HBM)
(3)
Machine model (MM)
(4)
ESD
CDM: charged device model (all packages
except MiniSO8)
(5)
CDM: charged device model (MiniSO8)
Parameter
Value
±18 or 36
±36
-0.3 to +36
Infinite
85
125
120
190
57
41
40
37
39
57
+150
-65 to +150
800
200
1.5
1.3
°C
V
Unit
R
thja
°C/W
R
thjc
T
j
T
stg
V
kV
1. Short-circuits from the output to V
CC+
can cause excessive heating and possible destruction. The
maximum output current is approximately 20 mA, independent of the magnitude of V
CC+
.
2. Short-circuits can cause excessive heating and destructive dissipation. Values are typical.
3. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating.
4. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5
Ω).
This is done for all couples of
connected pin combinations while the other pins are floating.
5. Charged device model: all pins and the package are charged together to the specified voltage and then
discharged directly to the ground through only one pin. This is done for all pins.
Table 2. Operating conditions
Symbol
V
icm
T
oper
Parameter
Common mode input voltage range
T
min
≤
T
amb
≤
T
max
Operating free-air temperature range
Value
0 to V
CC+
-1.5
0 to V
CC+
-2
-40 to +125
Unit
V
°C
4/19
DocID2470 Rev 11
LM2903
Electrical characteristics
4
Electrical characteristics
Table 3. V
CC+
= 5 V, V
CC-
= GND, T
amb
= 25°C (unless otherwise specified)
Symbol
V
io
I
io
I
ib
A
vd
Input offset voltage
(1)
T
min
≤
T
amb
≤
T
max
Input offset current
T
min
≤
T
amb
≤
T
max
Input bias current
(2)
T
min
≤
T
amb
≤
T
max
Parameter
Min.
Typ.
1
5
25
Max.
7
15
50
150
250
400
Unit
mV
nA
Large signal voltage gain
V
CC
= 15 V, R
L
= 15 kΩ, V
o
= 1 to 11 V
Supply current (all comparators)
V
CC
= 5 V, no load
V
CC
= 30 V, no load
Differential input voltage
(3)
Low level output voltage (V
id
= -1 V, I
sink
= 4 mA)
T
min
≤
T
amb
≤
T
max
High level output current (V
CC
=V
o
= 30 V, V
id
= 1 V)
T
min
≤
T
amb
≤
T
max
Output sink current (V
id
= -1 V, V
o
= 1.5 V)
Small signal response time
(4)
(R
L
= 5.1 kΩ to V
CC+
)
Large signal response time
(5)
TTL input (V
ref
= +1.4 V, R
L
= 5.1 kΩ to V
CC+
)
Output signal at 50 % of final value
Output signal at 95 % of final value
25
200
V/mV
I
CC
V
id
V
OL
I
OH
I
sink
t
res
0.4
1
1
2.5
V
CC+
mA
V
mV
nA
µA
mA
µs
250
0.1
400
700
1
6
16
1.3
t
rel
500
1
ns
µs
1.
At output switch point, V
O
≈
1.4 V, R
S
= 0
Ω
with V
CC+
from 5 V to 30 V, and over the full input common-mode range
(0 V to V
CC+
–1.5 V).
2. The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant,
independent of the state of the output, so no loading charge exists on the reference of input lines.
3. Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the
common-mode range, the comparator provides a proper output state. The low input voltage state must not be less than
–0.3 V (or 0.3 V below the negative power supply, if used).
4. The response time specified is for a 100 mV input step with 5 mV overdrive.
5. Maximum values are guaranteed by design and evaluation.
DocID2470 Rev 11
5/19
19
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