Features
■
■
■
■
■
■
■
■
Wide single supply voltage range or dual supplies for all devices: +2 V to +36 V or ±1 V to ±18 V
Very low supply current (1.1 mA) independent of supply voltage (1.4 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
TTL, DTL, ECL, MOS, CMOS compatible outputs
Description
This device consists of four independent precision voltage comparators, which are designed specifically to operate from a single supply over a wide range of voltages. Operation from split power supplies is also possible.
These comparators also have a unique characteristic in that the input common-mode voltage range includes the negative rail even though operated from a single power supply voltage.
LM2901
Low-power quad voltage comparator
N
DIP14
(Plastic package)
D
SO-14
(Plastic micropackage)
P
TSSOP14
(Thin shrink small outline package)
Q4
QFN16 3x3
(Plastic micropackage)
February 2012 Doc ID 2468 Rev 7 1/17 www.st.com
17
Pin connection and schematic diagram
1 Pin connection and schematic diagram
Figure 1.
Pin connections (top view)
O u tp u t 2
1
O u tp u t 1 2
V
CC
+ 3
Inverting inp u t 1
Non-inverting inp u t 1
4
5
Inverting inp u t 2
Non-inverting inp u t 2
6
7
14
O u tp u t 3
13
O u tp u t 4
12
V
C C
-
11
Non-inverting inp u t
4
10
Inverting inp u t 4
9
Non-inverting inp u t
3
8
Inverting inp u t 3
LM2901
2/17
Figure 2.
Schematic diagram
3 .5
μ A
Non-inverting inp u t
Inverting inp u t
V
CC
100
μ
A 3 .5
μ A
100 μ A
V
O
V
CC
Doc ID 2468 Rev 7
LM2901
2
Absolute maximum ratings and operating conditions
Absolute maximum ratings and operating conditions
Table 1.
Symbol
Absolute maximum ratings
Parameter
V
CC
V icm
T oper
Supply voltage
Common mode input voltage range
T min
≤
T amb
≤ max
Operating free-air temperature range
Value
2 to 32
±1 to ±16
0 to (V
CC
+
0 to (V
-1.5)
CC
+
-2)
-40 to +125
Unit
V
CC
V
V
R id in thja
Supply voltage
Differential input voltage
Input voltage
Output short-circuit to ground
(1)
Thermal resistance junction to ambient
(2)
DIP14
SO-14
TSSOP14
QFN16 3x3
±18 to 36
±36
-0.3 to +36
80
105
100
45
V
V
V
°C/W
R thjc
Thermal resistance junction to case
(2)
DIP14
SO-14
TSSOP14
QFN16 3x3
33
31
32
14
T
T j stg
Maximum junction temperature
Storage temperature range
HBM: human body model
(3)
+150
-65 to +150
500
°C
°C
V
ESD MM: machine model
(4)
CDM: charged device model
(5)
100 V
1500 V
1.
Short-circuits from the output to V
CC
+ can cause excessive heating and eventual destruction. The maximum output current is approximately 20 mA, independent of the magnitude of V
CC
+
.
2.
Short-circuits can cause excessive heating. Destructive dissipation can result from simultaneous shortcircuits on all amplifiers. All values are typical.
3.
Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 k
Ω 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.
Symbol
Operating conditions
Parameter Value Unit
V
V
°C
Doc ID 2468 Rev 7 3/17
Electrical characteristics LM2901
Table 3.
Electrical characteristics at V
CC
(unless otherwise specified)
+
= 5 V, V
CC
-
= GND, T amb
= 25° C
Symbol Parameter Min.
Typ.
Max.
Unit
V
I
I
A io io ib vd
Input offset voltage
(1)
T min
≤ amb
≤ T max
Input offset current
T min
≤ amb
≤ T max
Input bias current (I
I
+ or I
I
-
)
(2)
T min
≤ amb
≤ T max
Large signal voltage gain
(V
CC
= 15 V, R
L
= 15 k Ω , 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)
25
1
5
25
200
7
15
50
150
250
400 mV nA nA
V/mV
I
CC
V id
1.1
1.3
2
2.5
V
CC
+ mA
V
V
I
I t t
OL
OH sink res rel
Low level output voltage
V id
= -1V, I sink
= 4 mA
T min
≤ amb
≤
T max
High level output current
(V
CC
= V o
= 30 V, V id
= 1 V)
T min
≤ amb
≤ T max
Output sink current (V id
= -1 V,V o
= 1.5 V)
Small signal response time
(4)
(R
L
= 5.1 k Ω connected to V
CC
+
)
Large signal response time
(5)
TTL input (V ref
V
CC
+
)
= +1.4 V, R
L
= 5.1 k
Output signal at 50% of final value
Output signal at 95% of final value
Ω to
6
250
0.1
16
1.3
400
700
1 mV nA
µA mA
µs
500
1 ns
µs
1.
At output switch point, V mode range (0 V to V
CC
+
O
≈
1.4 V, R
S
–1.5 V).
= 0 with V
CC
+
from 5 V to 30 V, and over the full input common-
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 there is no loading charge on the reference of input lines.
3.
The response time specified is for a 100 mV input step with 5 mV overdrive.
4.
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 will provide 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).
5.
Maximum values are guaranteed by design.
4/17 Doc ID 2468 Rev 7
LM2901 Electrical characteristics
Figure 3.
Supply current vs. supply voltage Figure 4.
Input current vs. supply voltage
Figure 5.
Output saturation voltage vs. output current
Figure 6.
Response time for various input overdrives - negative transition
Figure 7.
Response time for various input overdrives - positive transition
Doc ID 2468 Rev 7 5/17
Typical application schematics
4 Typical application schematics
Figure 8.
Basic comparator
V
CC
= 5 V
Figure 9.
Driving CMOS
5 V
+V
(ref)
1/4
LM2901
15 k
Ω
V
O
+V
(ref)
1/ 4
LM2901
100 k
Ω
&
-V
(ref)
-V
(ref)
LM2901
Figure 10.
Driving TTL
+V
(ref)
-V
(ref)
1/ 4
LM2901
5 V
10 k Ω
&
&
Figure 11.
Low frequency op-amp
5 V
15 k
Ω
1/4
LM2901
~ e l
1 k
Ω
100 k
Ω
A
V
= 100 e o
0.5
μ
F
Figure 12.
Low frequency op-amp with boost Figure 13.
Transducer amplifier
5 V
5 V
(e o
= 0 V for e l
= 0 V)
15 k
Ω M a gnetic picku p 10 k
Ω
3 k Ω
1/ 4
LM2901
2N 2222
~ e l 0.5
μ
F
1/ 4
LM2901
20 M
Ω
1 k Ω
100 k Ω
A
V
= 100 e o
10 k Ω e o
6/17 Doc ID 2468 Rev 7
LM2901 Typical application schematics
Figure 14.
Low frequency op-amp with offset adjust
Off s et a dj us t
5 V
100 k Ω
5 V
R
2
1 M Ω e l
~
R
S
R
1
1 M Ω
15 k Ω
1/ 4
LM2901
0.5
μ F
R1
100 k Ω
2N 2222
1 k Ω
Figure 15.
Zero crossing detector (single power supply)
5 V e l
5.1 k
Ω
100 k Ω
5.1 k Ω
1N414 8
100 k
Ω
1/ 4
LM2901
20 M
Ω
5.1 k Ω e o
10 k
Ω
Figure 16.
Limit comparator
V
CC
(12 V)
V
(ref) high
2R
S
10 k Ω
1/ 4
LM2901
L a mp
R
S e
I
~
1/ 4
LM1 3 9
2N 2222
2R
S
V
(ref) low
Figure 18.
Crystal controlled oscillator
V
CC
= 15 V
0.1 μ
200 k Ω
F
100 k
Ω
2 k Ω
1/ 4
LM2901 e o
V
CC
0
200 k
Ω f = 100 kHz
Figure 17.
Split-supply applications - zero crossing detector
15 V e
I
~
1/4
LM2901
1/ 4
LM2901
5 V
15 V
5.1 k Ω e
I
~
15 V
Figure 19.
Comparator with a negative reference
15 V
5.1 k e o
Ω e o
Doc ID 2468 Rev 7 7/17
Typical application schematics LM2901
Figure 20.
Time delay generator
V
CC
0 t o
Inp u t g a ting s ign a l
V
CC t
A
V
(ref.)
10 k
Ω
V
3
V
C1
V
2
V
1
0 t t t
2 t
3 t
4 t
10 k
Ω
15 k Ω
V
C C
= +15 V
200 k Ω
10 k Ω
V
3
10 M
1/4
LM2901
Ω
3 k Ω
V
0 3
V
CC t o t
3
3 k Ω
1/4
LM2901
51 k Ω
V
C1
0.001
μ
F
V
2
10 k Ω
10 M
1/4
LM2901
Ω
10 M Ω
51 k
Ω
10 k Ω
1
/
4
LM2901
V
1
51 k Ω
V
O2
V
CC t o
3 k Ω
V
O1
V
CC t
0 t
1 t
2
Figure 21.
Two-decade high-frequency VCO
Fre qu ency control volt a ge inp u t
Vcontrol
100 k Ω
50 k Ω
10 k Ω
0.1 μ F
20 k Ω
20 k Ω
500 pF
1/ 4
LM2901
V
CC 100 k Ω
3 k Ω
5.1 k Ω
0.01 μ F
V
CC
/2
1/ 4
LM2901
1/ 4
LM2901
V
CC
/2
V
CC
+250 mV
700 Hz
= + 3 0 V f o
Vcontrol +50 V
100 kHz
V
CC
3 k Ω
Output 1
Output 2
8/17 Doc ID 2468 Rev 7
LM2901 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK
® specifications, grade definitions and product status are available at: www.st.com
.
ECOPACK
®
is an ST trademark.
Doc ID 2468 Rev 7 9/17
Package information
5.1 DIP14 package information
Figure 22.
DIP14 package mechanical drawing
LM2901
10/17
E1 e e1 eA eB
L b2 c
D
E
A
A1
A2 b
Table 4.
Ref.
DIP14 package mechanical data
Dimensions
Min.
Millimeters
Typ.
Max.
5.33
0.38
2.92
0.36
1.14
0.20
18.67
7.62
6.10
3.30
0.46
1.52
0.25
19.05
7.87
6.35
2.54
15.24
7.62
4.95
0.56
1.78
0.36
19.69
8.26
7.11
2.92
3.30
10.92
3.81
Min.
0.015
0.11
0.014
0.04
0.007
0.73
0.30
0.24
0.11
0.13
0.018
0.06
0.009
0.75
0.31
0.25
0.10
0.60
0.30
0.13
Inches
Typ.
Max.
0.21
0.19
0.022
0.07
0.01
0.77
0.32
0.28
0.43
0.15
Doc ID 2468 Rev 7
LM2901
5.2 QFN16 3 x 3 package information
Figure 23.
QFN16 3 x 3 mm package mechanical drawing
Package information
Doc ID 2468 Rev 7 11/17
Package information
Table 5.
Ref.
b
D
D2
E
E2
A
A1
A3 e
L
QFN16 3 x 3 mm package mechanical data (pitch 0.5 mm)
Dimensions
Millimeters Inches
Min.
0.80
0
Typ.
0.90
Max.
1.00
0.05
Min.
0.031
0
Typ.
0.035
0.20
0.008
0.18
2.90
1.50
2.90
1.50
3.00
3.00
0.30
3.10
1.80
3.10
1.80
0.007
0.114
0.059
0.114
0.059
0.118
0.118
0.30
0.50
0.50
0.012
Figure 24.
QFN16 3 x 3 mm footprint recommendation
0.020
LM2901
Max.
0.039
0.002
0.012
0.122
0.071
0.122
0.071
0.020
12/17 Doc ID 2468 Rev 7
LM2901
5.3 SO-14 package information
Figure 25.
SO-14 package mechanical drawing
Package information h
L e
H k ddd
D
E
B
C
A
A1
A2
Table 6.
Ref.
SO-14 package mechanical data
Dimensions
Millimeters
Min.
1.35
0.10
1.10
0.33
0.19
8.55
3.80
Typ.
Max.
1.75
0.25
1.65
0.51
0.25
8.75
4.0
1.27
5.80
0.25
0.40
6.20
0.50
1.27
8° (max.)
0.22
0.009
0.015
0.10
Min.
0.05
0.004
0.04
0.01
0.007
0.33
0.15
Inches
Typ.
0.05
0.24
0.02
0.05
0.004
Max.
0.068
0.009
0.06
0.02
0.009
0.34
0.15
Doc ID 2468 Rev 7 13/17
Package information
5.4 TSSOP14 package information
Figure 26.
TSSOP14 package mechanical drawing
LM2901
14/17 c
D
E
E1
A
A1
A2 b e
L
L1 k aaa
Table 7.
Ref.
TSSOP14 package mechanical data
Dimensions
Min.
Millimeters
Typ.
Min.
0.05
0.80
0.19
0.09
4.90
6.20
4.30
0.45
1.00
5.00
6.40
4.40
0.65
0.60
1.00
Max.
0.20
5.10
6.60
4.50
1.20
0.15
1.05
0.30
0.75
0.002
0.031
0.007
0.004
0.193
0.244
0.169
0.018
0° 8°
0.10
0°
0.197
0.252
0.173
0.0256
0.024
0.039
Inches
Typ.
0.004
0.039
Max.
0.047
0.006
0.041
0.012
0.0089
0.201
0.260
0.176
0.030
8°
0.004
Doc ID 2468 Rev 7
LM2901 Ordering information
Table 8.
Order codes
Order code
Temperature range
Package Packing Marking
LM2901N
LM2901D
LM2901DT
LM2901PT
LM2901Q4T
LM2901YDT
LM2901YPT
(1)
(1)
-40°C to +125°C
DIP14
SO-14
TSSOP14
QFN16 3x3
SO-14
(Automotive grade)
TSSOP14
(Automotive grade)
Tube
Tube or tape & reel
Tape & reel
Tape & reel
Tape & reel
Tape & reel
1.
Qualified and characterized according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent.
LM2901N
2901
K5I
2901Y
Doc ID 2468 Rev 7 15/17
Revision history LM2901
Table 9.
Date
01-Jan-2002
01-Jul-2005
01-Oct-2005
18-Jul-2006
30-Apr-2009
Document revision history
19-Dec-2007
06-Feb-2012
Revision
1
2
3
4
5
6
7
Changes
Initial release.
1 - PPAP references inserted in the datasheet see Table : Order codes on page 1 .
2 - ESD protection inserted in Table 1 on page 3
.
The following changes were made in this revision:
– PPAP part number added in table Order codes on page 1 .
– Formatting changes throughout.
ESD HBM value corrected in Table 1 on page 3 .
Added R thja
and R thjc
parameters to
Table 1: Absolute maximum ratings
. Added footnotes for ESD parameters.
Removed V icm
parameter from electrical characteristics in Table 3 .
Reformatted package information in Section 5 .
Added footnotes for automotive grade parts in Table 8: Order codes
.
Document reformatted.
Updated package information in
Chapter 5: Package information
.
Removed note 2 under Table 8: Order codes
.
Added QFN16 3 x 3 package in
Chapter 5 .
Removed LM2901YD order code from
Table 8
.
16/17 Doc ID 2468 Rev 7
LM2901
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Doc ID 2468 Rev 7 17/17
