LM2903Q2T [STMICROELECTRONICS]
Low-power dual voltage comparator; 低功耗双电压比较器
| 型号： | LM2903Q2T |
| 厂家： | 
ST |
| 描述： | Low-power dual voltage comparator |
| 文件： | 总18页 (文件大小：796K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM2903
Low-power dual voltage comparator
Datasheet −production data
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
N
DIP8
(Plastic package)
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:
D
SO-8
250 mV typ. (I = 4 mA)
O
■ Differential input voltage range equal to the
(Plastic micropackage)
supply voltage
■ TTL, DTL, ECL, MOS, CMOS compatible
outputs
■ Automotive qualification
P
Description
TSSOP8
(Thin shrink small outline package)
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.
The device also 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)
December 2012
Doc ID 2470 Rev 10
1/18
This is information on a product in full production.
www.st.com
18
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
DIP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
TSSOP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
DFN8 2x2 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7
8
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2/18
Doc ID 2470 Rev 10
LM2903
Schematic diagram
1
Schematic diagram
Figure 1.
Schematic diagram (1/2 LM2903)
100 μA
3.5 μA
100 μA
3.5 μA
Non-inverting
input
Inverting
input
2
Package pin connections
Figure 2.
Pin connections for each package (top view)
/54ꢃ
ꢃ
ꢁ
ꢄ
ꢅ
ꢉ
ꢈ
ꢇ
ꢆ
6##ꢀ
/54ꢁ
).ꢁꢂ
).ꢃꢂ
).ꢃꢀ
6##ꢂ
ꢂ
ꢀ
ꢂ
ꢀ
).ꢁꢀ
DIP8 / SO-8 / TSSOP8 / DFN8
Doc ID 2470 Rev 10
3/18
Absolute maximum ratings and operating conditions
LM2903
3
Absolute maximum ratings and operating conditions
Table 1.
Symbol
Absolute maximum ratings
Parameter
Value
Unit
VCC
Vid
Supply voltage
18 or 36
36
Differential input voltage
Input voltage
V
Vin
-0.3 to +36
Infinite
Output short-circuit to ground (1)
Thermal resistance junction to ambient(2)
DIP8
SO-8
TSSOP8
DFN8 2x2 mm
85
125
120
57
Rthja
°C/W
Thermal resistance junction to case(2)
DIP8
SO-8
TSSOP8
41
40
37
Rthjc
Tj
Maximum junction temperature
Storage temperature range
Human body model (HBM)(3)
Machine model (MM)(4)
+150
-65 to +150
800
°C
Tstg
V
ESD
200
CDM: charged device model(5)
1.5
kV
1. Short-circuits from the output to VCC+ can cause excessive heating and possible destru+ction. The
maximum output current is approximately 20 mA, independent of the magnitude of VCC
.
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.
Symbol
Operating conditions
Parameter
Value
Unit
Common mode input voltage range
Tmin ≤ Tamb ≤ Tmax
0 to VCC+ -1.5
0 to VCC+ -2
Vicm
V
Toper
Operating free-air temperature range
-40 to +125
°C
4/18
Doc ID 2470 Rev 10
LM2903
Electrical characteristics
4
Electrical characteristics
+
-
Table 3.
Symbol
V
= 5 V, V
= GND, T
= 25°C (unless otherwise specified)
amb
CC
CC
Parameter
Min.
Typ.
Max.
Unit
Input offset voltage(1)
Tmin ≤ Tamb ≤ Tmax
1
7
15
Vio
Iio
mV
Input offset current
Tmin ≤ Tamb ≤ Tmax
Input bias current(2)
Tmin ≤ Tamb ≤ Tmax
5
50
150
nA
25
250
400
Iib
Large signal voltage gain
VCC = 15 V, RL= 15 kΩ, Vo= 1 to 11 V
Avd
25
200
V/mV
mA
Supply current (all comparators)
ICC
VCC = 5 V, no load
VCC = 30 V, no load
0.4
1
1
2.5
Differential input voltage(3)
VCC
V
+
Vid
Low level output voltage (Vid = -1 V, Isink = 4 mA)
Tmin ≤ Tamb ≤ Tmax
250
0.1
400
700
VOL
mV
High level output current (VCC =Vo = 30 V, Vid = 1 V)
Tmin ≤ Tamb ≤ Tmax
nA
µA
IOH
1
Isink
tres
Output sink current (Vid = -1 V, Vo = 1.5 V)
6
16
mA
µs
Small signal response time(4) (RL = 5.1 kΩ to VCC
)
1.3
+
Large signal response time(5)
TTL input (Vref = +1.4 V, RL= 5.1 kΩ to VCC
+
)
trel
Output signal at 50 % of final value
Output signal at 95 % of final value
500
1
ns
µs
1. At output switch point, VO ≈ 1.4 V, RS = 0 Ω with VCC+ from 5 V to 30 V, and over the full input common-mode range
(0 V to VCC+ –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.
Doc ID 2470 Rev 10
5/18
Electrical characteristics
LM2903
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
6/18
Doc ID 2470 Rev 10
LM2903
Typical application schematics
5
Typical application schematics
Figure 8.
Basic comparator
Figure 9.
Driving CMOS
5 V
VCC
= 5 V
15 kΩ
100 kΩ
+V(ref)
+V(ref)
1/ 2
LM2903
&
1/2
LM2903
VO
-V(ref)
-V(ref)
Figure 10. Driving TTL
Figure 11. Low frequency op-amp
5 V
5 V
15 k
Ω
1/2
LM2903
10 kΩ
+V(ref)
~
el
1/ 2
LM2903
&
&
eo
-V(ref)
100 kΩ
0.5 μF
1 kΩ
AV = 100
Figure 12. Low frequency op-amp with boost Figure 13. Transducer amplifier
5 V
5 V
(eo = 0 V for el = 0 V)
Magnetic pick-up
10 kΩ
3 kΩ
15 kΩ
0.5 μF
1/ 2
2N 2222
1/ 2
LM2903
LM2903
eo
~
el
20 MΩ
100 kΩ
AV = 100
eo
1 kΩ
10 kΩ
Doc ID 2470 Rev 10
7/18
Typical application schematics
LM2903
Figure 14. Low frequency op- amp with offset Figure 15. Zero crossing detector
adjust
(single power supply)
5 V
5 V
100 kΩ
Offset adjust
5 V
100 kΩ
5.1 kΩ
5.1 kΩ
100 kΩ
R2
1 MΩ
1 MΩ
5.1 kΩ
RS
R1
15 kΩ
el
1/ 2
LM2903
1/ 2
LM2903
2N 2222
~
el
1N4148
μ
0.5
R1
F
100 kΩ
1 kΩ
20 MΩ
10 kΩ
eo
Figure 16. Limit comparator
Figure 17. Split-supply applications - zero
crossing detector
VCC
(12 V)
15 V
10 kΩ
2RS
RS
V(ref)
1/ 2
high
5.1 kΩ
LM2903
Lamp
1/2
LM2903
eo
eI
~
~
eI
1/2
LM2903
2N 2222
15 V
2RS
V(ref)
low
Figure 18. Crystal controlled oscillator
Figure 19. Comparator with a negative
reference
VCC
= 15 V
15 V
200 kΩ
2 kΩ
100 kΩ
5.1 kΩ
VCC
0
1/2
LM2903
eo
0.1 μF
1/2
LM2903
eo
eI
~
5 V
f = 100 kHz
15 V
200 kΩ
8/18
Doc ID 2470 Rev 10
LM2903
Typical application schematics
Figure 20. Time delay generator
VC C = +15V
3 kΩ
10 kΩ
15 kΩ
200 kΩ
10 MΩ
10 kΩ
10 kΩ
10 kΩ
1/2
LM2903
VCC
V03
V3
to
t3
3 kΩ
10 MΩ
10 kΩ
51 kΩ
VC1
1/2
LM2903
VCC
0
1/2
LM2903
VCC
V
to
tA
O2
V2
V(ref.)
to
t2
μ
0.001 F
Input gating signal
3 kΩ
VCC
10 MΩ
51 kΩ
1/2
LM2903
V
3
VCC
VO1
VC1
V2
V1
0
t0 t1
V1
t
51 kΩ
t2 t3
t4
t1
t0
Figure 21. Two-decade high-frequency VCO
VCC
VCC
100 kΩ
100 kΩ
500 pF
3 kΩ
5.1 kΩ
3 kΩ
1/ 2
Frequency control
voltage input
Vcontrol
10 kΩ
0.1 μF
LM2903
1/ 2
LM2903
Output 1
0.01 μF
VCC
/2
20 kΩ
Output 2
20 kΩ
50 kΩ
VCC
/2
1/ 2
LM2903
VCC
= + 30 V
V
+50 V
100 kHz
+250 mV
700 Hz
control
f
o
Doc ID 2470 Rev 10
9/18
Package information
LM2903
6
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.
10/18
Doc ID 2470 Rev 10
LM2903
Package information
6.1
DIP8 package information
Figure 22. DIP8 package mechanical drawing
Table 4.
Ref.
DIP8 package mechanical data
Millimeters
Dimensions
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
A
A1
A2
b
5.33
0.210
0.38
2.92
0.36
1.14
0.20
9.02
7.62
6.10
0.015
0.115
0.014
0.045
0.008
0.355
0.300
0.240
3.30
0.46
1.52
0.25
9.27
7.87
6.35
2.54
7.62
4.95
0.56
1.78
0.36
10.16
8.26
7.11
0.130
0.018
0.060
0.010
0.365
0.310
0.250
0.100
0.300
0.195
0.022
0.070
0.014
0.400
0.325
0.280
b2
c
D
E
E1
e
eA
eB
L
10.92
3.81
0.430
0.150
2.92
3.30
0.115
0.130
Doc ID 2470 Rev 10
11/18
Package information
LM2903
6.2
SO-8 package information
Figure 23. SO-8 package mechanical drawing
Table 5.
Ref.
SO-8 package mechanical data
Millimeters
Dimensions
Inches
Typ.
Min.
Typ.
Max.
Min.
Max.
A
A1
A2
b
1.75
0.25
0.069
0.010
0.10
1.25
0.28
0.17
4.80
5.80
3.80
0.004
0.049
0.011
0.007
0.189
0.228
0.150
0.48
0.23
5.00
6.20
4.00
0.019
0.010
0.197
0.244
0.157
c
D
4.90
6.00
3.90
1.27
0.193
0.236
0.154
0.050
E
E1
e
h
0.25
0.40
0.50
1.27
0.010
0.016
0.020
0.050
L
L1
k
1.04
0.040
1°
8°
1°
8°
ccc
0.10
0.004
12/18
Doc ID 2470 Rev 10
LM2903
Package information
6.3
TSSOP8 package information
Figure 24. TSSOP8 package mechanical drawing
Table 6.
Ref.
TSSOP8 package mechanical data
Dimensions
Millimeters
Typ.
Inches
Min.
Max.
Min.
Typ.
Max.
A
A1
A2
b
1.20
0.15
1.05
0.30
0.20
3.10
6.60
4.50
0.047
0.006
0.041
0.012
0.008
0.122
0.260
0.177
0.05
0.80
0.19
0.09
2.90
6.20
4.30
0.002
0.031
0.007
0.004
0.114
0.244
0.169
1.00
0.039
c
D
3.00
6.40
4.40
0.65
0.118
0.252
0.173
0.0256
E
E1
e
k
0°
8°
0°
8°
L
0.45
0.60
1
0.75
0.018
0.024
0.039
0.030
L1
aaa
0.10
0.004
Doc ID 2470 Rev 10
13/18
Package information
LM2903
6.4
DFN8 2x2 package mechanical data
Figure 25. DFN8 2x2 package mechanical drawing
!-3ꢊꢊꢊꢃꢋ?6ꢃ
Table 7.
Ref.
DFN8 2x2x0.6 mm package mechanical data (pitch 0.5 mm)
Dimensions
Millimeters
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
A
A1
A3
b
0.51
0.55
0.60
0.05
0.020
0.022
0.024
0.002
0.15
0.25
2.00
1.60
2.00
0.90
0.50
0.006
0.010
0.079
0.063
0.079
0.035
0.020
0.18
1.85
1.45
1.85
0.75
0.30
2.15
1.70
2.15
1.00
0.007
0.073
0.057
0.073
0.030
0.012
0.085
0.067
0.085
0.039
D
D2
E
E2
e
L
0.50
0.08
0.020
0.003
ddd
14/18
Doc ID 2470 Rev 10
LM2903
Package information
Figure 26. DFN8 2x2 footprint recommendation
ꢃꢌꢇꢊ MM
ꢁꢌꢉꢊ MM
ꢊꢌꢅꢆ MM
ꢊꢌꢈꢆ MM
ꢊꢌꢄꢊ MM
ꢊꢌꢆꢊ MM
!-3ꢊꢊꢊꢃꢉ?6ꢃ
Doc ID 2470 Rev 10
15/18
Ordering information
LM2903
7
Ordering information
Table 8.
Order codes
Temperature
Order code
Package
Packing
Marking
range
LM2903N
DIP8
SO-8
Tube
LM2903N
2903
LM2903D/DT
Tube or tape & reel
SO-8
(Automotive grade)
LM2903YDT(1)
LM2903PT
2903Y
2903
-40°C to +125°C
TSSOP8
Tape & reel
TSSOP8
(Automotive grade)
LM2903YPT(2)
LM2903Q2T
2903Y
K1Z
DFN8 2x2mm
1. Qualified and characterized according to AEC Q100 and Q003 or equivalent, advanced screening
according to AEC Q001 & Q 002 or equivalent.
2. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening
according to AEC Q001 & Q 002 or equivalent are on-going.
16/18
Doc ID 2470 Rev 10
LM2903
Revision history
8
Revision history
Table 9.
Date
Document revision history
Revision
Changes
15-Jun-2003
2-May-2005
1
2
Initial release.
PPAP references inserted in the datasheet see table order code p1.
Electrical characteristics table corrected (see Table 3 on page 5).
Pin connections diagram moved to cover page.
Lead-free package information added.
8-Aug-2005
3
27-Oct-2005
11-May-2007
4
5
PPAP part number added in Table 8: Order codes.
ESD tolerance added in Table 1: Absolute maximum ratings on
page 4.
Added Rthja and Rthjc, and ESD CDM parameters in Table 1:
Absolute maximum ratings.
Removed Vicm from electrical characteristics in Table 3.
Reformatted package information in Section 6.
17-Jan-2008
6
Added footnotes for automotive grade parts in Table 8: Order codes.
Corrected SO-8 package mechanical data. Dimension E in drawing
was marked H in table.
21-Feb-2008
7
Corrected revision history (revision 6 is of January 2008, not January
2007).
03-Dec-2009
16-Feb-2012
8
9
Added pin description on cover page.
Removed LM2903YD order code from Table 8.
Added the DFN8 package
05-Dec-2012
10
Small modifications to Figure 2 and Table 1.
Doc ID 2470 Rev 10
17/18
LM2903
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