LMV7271/LMV7275/LMV7272
Single & Dual, 1.8V Low Power Comparators with
Rail-to-Rail Input
General Description
The LMV727X are rail-to-rail input low power comparators,
which are characterized at supply voltage 1.8V, 2.7V and
5.0V. They consume only 9uA supply current per channel
while achieving a 800ns propagation delay.
The LMV7271/LMV7275 (single) are available in SC70 and
SOT23 packages. The LMV7272 (dual) is available in micro
SMD package. With these tiny packages, the PC board area
can be significantly reduced. They are ideal for low voltage,
low power and space critical designs.
The LMV7271/LMV7272 both feature a push-pull output
stage which allows operation with minimum power consump-
tion when driving a load. The LMV7275 features an open
drain output stage that allows for wired-OR configurations.
The open drain output also offers the advantage of allowing
the output to be pulled to any voltage up to 5V, regardless of
the supply voltage of the LMV7275.
The LMV727X are built with National Semiconductor's ad-
vance submicron silicon-gate BiCMOS process. They all
have bipolar inputs for improved noise performance and
CMOS outputs for rail-to-rail output swing.
Features
(V
S
= 1.8V, T
A
= 25C, Typical values unless specified).
n
Single or Dual Supplies
n
Ultra low supply current
9A per channel
n
Low input bias current
10nA
n
Low input offset current
200pA
n
Low guaranteed V
OS
4mV
n
Propagation delay
880ns (20mV overdrive)
n
Input common mode voltage range
0.1V beyond rails
n
LMV7272 is available in micro SMD package
Applications
n
Mobile communications
n
Laptops and PDA's
n
Battery powered electronics
n
General purpose low voltage applications
Typical Circuit
Part Number Single/Dual
Package
Output
LMV7271
Single
SC70,
SOT23
Push/Pull
LMV7272
Dual
micro SMD
Push/Pull
LMV7275
Single
SC70,
SOT23
Open Drain
20064024
FIGURE 1. Threshold Detector
September 2003
LMV7271/LMV7275/LMV7272
Single
&
Dual,
1.8V
Low
Power
Comparators
with
Rail-to-Rail
Input
2003 National Semiconductor Corporation
DS200640
www.national.com
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
ESD Tolerance
2KV (Note 2)
200V (Note 6)
V
IN
Differential
Supply Voltage
Supply Voltage (V
+
- V
-
)
5.5V
Voltage at Input/Output pins
V
+
+0.1V, V
-
-0.1V
Soldering Information
Infrared or Convection (20 sec.)
235C
Wave Soldering (10 sec.)
260C
Storage Temperature Range
-65C to +150C
Junction Temperature (Note 4)
+150C
Operating Ratings
(Note 1)
Operating Temperature Range
(Note 3)
-40C to +85C
Package Thermal Resistance (Note 3)
SOT23-5
325C/W
SC-70
265C/W
8-Bump Thin micro SMD
220C/W
1.8V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 1.8V, V
-
= 0V. Boldface limits apply at the temperature
extremes.
Symbol
Parameter
Condition
Min
(Note 5)
Typ
(Note 4)
Max
(Note 5)
Units
V
OS
Input Offset Voltage
0.3
4
6
mV
TC V
OS
Input Offset Temperature Drift
V
CM
= 0.9V (Note 7)
20
uV/C
I
B
Input Bias Current
10
nA
I
OS
Input Offset Current
200
pA
I
S
Supply Current
LMV7271/LMV7275
9
12
14
A
LMV7272
18
25
28
A
I
SC
Output Short Circuit Current
Sourcing, V
O
= 0.9V
(LMV7271/LMV7272 only)
3.5
6
mA
Sinking, V
O
= 0.9V
4
6
V
OH
Output Voltage High
(LMV7271/LMV7272 only)
I
O
= 0.5mA
1.7
1.74
V
I
O
= 1.5mA
1.47
1.63
V
OL
Output Voltage Low
I
O
= -0.5mA
52
100
mV
I
O
= -1.5mA
166
220
V
CM
Input Common Mode Voltage
Range
CMRR
>
45 dB
1.9
V
-0.1
V
CMRR
Common Mode Rejection Ratio
0
<
V
CM
<
1.8V
46
78
dB
PSRR
Power Supply Rejection Ratio
V
+
= 1.8V to 5V
55
80
dB
I
LEAKAGE
Output Leakage Current
V
O
= 1.8V (LMV7275 only)
2
pA
1.8V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 1.8V, V
-
= 0V, V
CM
= 0.5V, V
O
= V
+
/2 and R
L
>
1M
to
V
-
. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
t
PHL
Propagation Delay
(High to Low)
Input Overdrive = 20mV
Load = 50pF//5k
880
ns
Input Overdrive = 50mV
Load = 50pF//5k
570
ns
t
PLH
Propagation Delay
(Low to High)
Input Overdrive = 20mV
Load = 50pF//5k
1100
ns
Input Overdrive = 50mV
Load = 50pF//5k
800
ns
LMV7271/LMV7275/
LMV7272
www.national.com
2
2.7V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 2.7V, V
-
= 0V. Boldface limits apply at the temperature
extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
V
OS
Input Offset Voltage
0.3
4
6
mV
TC V
OS
Input Offset Temperature Drift
V
CM
= 1.35V (Note 7)
20
V/C
I
B
Input Bias Current
10
nA
I
OS
Input offset Current
200
pA
I
S
Supply Current
LMV7271/LMV7275
9
13
15
A
LMV7272
18
25
28
A
I
SC
Output Short Circuit Current
Sourcing, V
O
= 1.35V
(LMV7271/LMV7272 only)
12
15
mA
Sinking, V
O
= 1.35V
12
15
V
OH
Output Voltage High
(LMV7271/LMV7272 only)
I
O
= 0.5mA
2.63
2.66
V
I
O
= 2.0mA
2.48
2.55
V
OL
Output Voltage Low
I
O
= -0.5mA
50
70
mV
I
O
= -2mA
155
220
V
CM
Input Common Voltage Range
CMRR
>
45dB
2.8
V
-0.1
V
CMRR
Common Mode Rejection Ratio
0
<
V
CM
<
2.7V
46
78
dB
PSRR
Power Supply Rejection Ratio
V
+
= 1.8V to 5V
55
80
dB
I
LEAKAGE
Output Leakage Current
V
O
= 2.7V (LMV7275 only)
2
pA
2.7V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 2.7V, V
-
= 0V, V
CM
= 0.5V, V
O
= V
+
/2 and R
L
>
1M
to
V
-
. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
t
PHL
Propagation Delay
(High to Low)
Input Overdrive = 20mV
Load = 50pF//5k
1200
ns
Input Overdrive = 50mV
Load = 50pF//5k
810
ns
t
PLH
Propagation Delay
(Low to High)
Input Overdrive = 20mV
Load = 50pF//5k
1300
ns
Input Overdrive = 50mV
Load = 50pF//5k
860
ns
5.0V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 0V. Boldface limits apply at the temperature ex-
tremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
V
OS
Input Offset Voltage
0.3
4
6
mV
TC V
OS
Input Offset Temperature Drift
V
CM
= 2.5V (Note 7)
20
V/C
I
B
Input Bias Current
10
nA
I
OS
Input Offset Current
200
pA
LMV7271/LMV7275/
LMV7272
www.national.com
3
5.0V Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 0V. Boldface limits apply at the temperature ex-
tremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
I
S
Supply Current
LMV7271/LMV7275
10
14
16
A
LMV7272
20
27
30
A
I
SC
Output Short Circuit Current
Sourcing, V
O
= 2.5V
(LMV7271/LMV7272 only)
28
34
mA
Sinking, V
O
= 2.5V
28
34
V
OH
Output Voltage High
(LMV7271/LMV7272 only)
I
O
= 0.5mA
4.93
4.96
V
I
O
= 4.0mA
4.70
4.77
V
OL
Output Voltage Low
I
O
= -0.5mA
27
70
mV
I
O
= -4.0mA
225
300
V
CM
Input Common Voltage Range
CMRR
>
45dB
5.1
V
-0.1
CMRR
Common Mode Rejection Ratio
0
<
V
CM
<
5.0V
46
78
dB
PRSS
Power Supply Rejection Ratio
V
+
= 1.8V to 5V
55
80
dB
I
LEAKAGE
Output Leakage Current
V
O
= 5V (LMV7275 only)
2
pA
5.0V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 5.0V, V
-
= 0V, V
CM
= 0.5V, V
O
= V
+
/2 and R
L
>
1M
to
V
-
. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
t
PHL
Propagation Delay
(High to Low)
Input Overdrive = 20mV
Load = 50pF//5k
2100
ns
Input Overdrive = 50mV
Load = 50pF//5k
1380
ns
t
PLH
Propagation Delay
(Low to High)
Input Overdrive = 20mV
Load = 50pF//5k
1800
ns
Input Overdrive = 50mV
Load = 50pF//5k
1100
ns
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Human body model, 1.5k
in series with 100pF.
Note 3: The maximum power dissipation is a function of T
J(MAX)
,
JA
, and T
A
. The maximum allowable power dissipation at any ambient temperature is
P
D
= (T
J(MAX)
- T
A
)/
JA
. All numbers apply for packages soldered directly into a PC board.
Note 4: Typical values represent the most likely parametric norm.
Note 5: All limits are guaranteed by testing or statistical analysis.
Note 6: Machine Model, 0
in series with 200pF.
Note 7: Offset Voltage average drift determined by dividing the change in V
OS
at temperature extremes into the total temperature change.
Note 8: Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of
the device such that T
J
= T
A
. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self heating where T
J
>
T
A
.
Absolute Maximum Ratings indicate junction temperature limits beyond which the device may be permanently degraded, either mechanically or electrically.
LMV7271/LMV7275/
LMV7272
www.national.com
4
Connection Diagrams
5-Pin SOT23/SC70 (LMV7271/LMV7275)
8-Bump micro SMD (LMV7272)
20064023
Top View
20064041
Top View
(bump side down)
Ordering Information
Package
Part Number
Package Marking
Transport Media
NSC Drawing
5-Pin SOT23
LMV7271MF
C25A
1k Units Tape and Reel
MF05A
LMV7271MFX
3k Units Tape and Reel
LMV7275MF
C26A
1k Units Tape and Reel
LMV7275MFX
3k Units Tape and Reel
5-Pin SC70
LMV7271MG
C34
1k Units Tape and Reel
MAA05A
LMV7271MGX
3k Units Tape and Reel
LMV7275MG
C35
1k Units Tape and Reel
LMV7275MGX
3k Units Tape and Reel
8-Bump
micro SMD
LMV7272TL
I 01
250 Units Tape and Reel
TLA08AAA
LMV7272TLX
3k Units Tape and Reel
LMV7271/LMV7275/
LMV7272
www.national.com
5
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