LM4041
Precision micropower shunt voltage reference
Datasheet
-
production data
Description
The LM4041 is a micropower shunt voltage
reference, providing a stable 1.225 V output
voltage, with an initial accuracy of 0.1% @ 25 °C
and a low temperature coefficient. Available in
SOT323-5L and SOT23-3L surface mount
packages, it can be designed in applications
where space saving is a critical issue. The low
operating current is a key advantage for power
restricted designs. In addition, the LM4041 is very
stable and can be used in a broad range of
application conditions.
SOT23-3L
SOT323-5L
Features
•
Fixed 1.225 V typical output voltage
•
Ultra low operating current: 40 µA at 25 °C
•
High precision: +/- 0.1% @ 25 °C (0.2%, 0.5%
and 1% versions are also available)
•
Stable when used with capacitive loads
•
Industrial (- 40 to+ 85 °C) and Extended (- 40
to +125 °C) temperature range versions
available
•
100 ppm/°C maximum temperature coefficient
•
Available in SOT23-3L and SOT323-5L
packages
Applications
•
Computers
•
Battery chargers
•
Switch mode power supply
•
Battery operated equipment
•
Data acquisition systems
•
Energy management
•
Instrumentation
February 2014
This is information on a product in full production.
DocID018817 Rev 4
1/16
www.st.com
Contents
LM4041
Contents
1
2
3
4
5
6
7
8
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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DocID018817 Rev 4
LM4041
Pin configuration
1
Pin configuration
Figure 1. Pin connection (top view)
Note:
Below pins must be left floating or connected to Anode pin to improve noise immunity due to
PCB layout.
SOT23-3L: pin 3.
SOT323-5L: pin 2, pin 4 and pin 5.
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Maximum ratings
LM4041
2
Maximum ratings
Table 1. Absolute maximum ratings
Symbol
I
K
V
K
I
F
P
D
T
STG
Parameter
Reverse breakdown current
Maximum cathode voltage
Forward current
Power dissipation
(1)
SOT23-3L
SOT323-5L
Storage temperature
Human body model (HBM)
ESD
Machine model (MM)
Charged device model
T
LEAD
T
J
Lead temperature (soldering) 10 sec
Max junction temperature
Value
20
8
10
500
536
- 65 to +150
2
200
1500
260
+150
Unit
mA
V
mA
mW
°C
kV
V
V
°C
°C
1. P
D
has been calculated with T
AMB
= 25°C and T
JMAX
= 150 °C.
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 2. Thermal data
Symbol
R
thJA
R
thJC
Parameter
Thermal resistance junction-ambient
Thermal resistance junction-case
SOT323-5L
233
90
SOT23-3L
248
136
Unit
°C/W
°C/W
Table 3. Operating conditions
Symbol
I
KMIN
I
KMAX
T
OPER
Minimum operating current
Maximum operating current
Industrial
Operating free air temperature range
Extended
- 40 to + 125
Parameter
Value
40
12
- 40 to + 85
°C
Unit
µA
mA
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DocID018817 Rev 4
LM4041
Electrical characteristics
3
Electrical characteristics
T
AMB
= 25 °C, unless otherwise specified.
Table 4. Electrical characteristics
Symbol
Parameter
Test conditions
I
k
= 100 µA
LM4041A, 0.1%
LM4041B, 0.2%
LM4041C, 0.5%
LM4041D, 1%
T
amb
= 25 °C
-40 °C < T
amb
< T
max (1)
I
k
= 100 µA
I
kmin
< I
k
< 1 mA
- 40 °C < T
amb
< T
max (1)
1 mA < I
k
< 12 mA
- 40 °C < T
amb
< T
max (1)
ΔI
k
= 100 µA to 1 mA
I
k
= 100 µA, t = 1000 hrs
I
k
= 100 µA, 10 Hz < f < 10 kHz
Min.
Typ.
Max.
Unit
V
k
Reverse breakdown
voltage
1.2238
1.2225
1.219
1.213
1.225
1.2262
1.2275
1.231
1.237
40
V
I
kmin
ΔV
k
/ΔT
Minimum operating
current
Average temperature
coefficient
(2)
Reverse breakdown
voltage change with
operating current range
Static impedance
Long term stability
Wide band noise
25
µA
50
± 36
0.4
4
0.4
120
60
± 100
1
1.5
mV
8
10
1
W
ppm
µV
RMS
ppm/°C
ΔV
k
/ΔI
k
R
ka
K
vh
e
n
1. T
max
= 85 °C for LM4041xI (industrial version) and T
max
= 125 °C for LM4041xE (extended version).
2. The average temperature coefficient is defined as: 10
6
x {max(
Δ
V
k
)
/
[V
k@25°C
x (
T
max
-T
min
)]} [ppm/°C].
Note:
Limits are 100% production tested at 25 °C. Limits over temperature are guaranteed
through correlation and by design.
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