LM4041
1.225V Precision micropower shunt voltage reference
Description
The LM4041 is a bandgap circuit designed to
achieve a precision micro-power voltage
reference of 1.225 V. The device is available in
the small outline SOT23 surface mount
packages which is ideal for applications
where space saving is important.
The LM4041 is available to 0.5% C grade for
precision applications. Excellent performance
is maintained over the 60 A to 12mA
operating current range with a typical
temperature coefficient of only 20ppm/°C.
The device has been designed to be highly
tolerant of capacitive loads so maintaining
excellent stability.
This device offers a pin for pin compatible
alternative to the LM4041 voltage reference.
Features
•
•
•
Small packages: SOT23
No output capacitor required
Output voltage tolerance
•
•
•
•
•
•
LM4041C
LM4041D
±0.5% at 25°C
±1% at 25°C
Applications
•
•
•
•
•
•
Battery powered equipment
Precision power supplies
Portable instrumentation
Portable communications devices
Notebook and palmtop computers
Data acquisition systems
Low output noise
(10 Hz to 10kHz) ........... 60 Vrms
Wide operating current range 60 A to 12mA
Extended temperature range -40°C to +125°C
Low temperature coefficient 100ppm/°C (max)
Pinout information
LM4041_12F (SOT23)
Cathode
1
3
*
Anode
2
Top view
* Pin 3 must be left floating or connected to pin 2
Ordering information
25°C
tol.
0.5%
1%
Voltage
(V)
1.225
1.225
Order code
LM4041CFTA
LM4041DFTA
Pack
SOT23
SOT23
Part
mark
R1C
R1D
1
Status
Preview
Preview
Reel size
7”, 180mm
7”, 180mm
Tape
width
8mm
8mm
QuantIty
per reel
3000
3000
Issue 3 - February 2007
© Zetex Semiconductors plc 2007
www.zetex.com
LM4041
Absolute maximum ratings
Continuous reverse current (I
KA
) .................................... 20mA
Continuous forward current (I
REF
) .................................. 10mA
Operating junction temperature ..................................... -40°C to 150°C
Storage temperature ....................................................... -55°C to 150°C
Operation above the absolute maximum rating may cause device failure. Operation at the
absolute maximum ratings, for extended periods, may reduce device reliability.
Unless otherwise stated voltages specified are relative to the ANODE pin.
Package thermal data
Package
SOT23
JA
P
DIS
T
amb
=25°C, T
J
= 150°C
330mW
380°C/W
Recommended operating conditions
Min.
Reverse current
Operating ambient temperature range
0.06
-40
Max.
15
125
Units
mA
°C
Issue 3 - February 2007
© Zetex Semiconductors plc 2007
2
www.zetex.com
LM4041
Electrical characteristics
Over recommended operating conditions, T
amb
= 25°C, unless otherwise stated. LM4041C and
LM4041D have initial tolerances of 0.5% and 1% respectively.
Symbol Parameter
Conditions
T
amb
Reverse breakdown
voltage
V
REF
Reverse breakdown
voltage tolerance
I
R
= 100 A
25°C
25°C
I
R
= 100 A
-40 to 85°C
-40 to 125°C
25°C
I
RMIN
Minimum operating
current
-40 to 85°C
-40 to 125°C
I
R
= 10 mA -40 to 125°C
Average reverse
I
R
= 1 mA,
V
R
/ T breakdown voltage
temperature coefficient
I
R
= 100 A
25°C
I
RMIN
< I
R
<
1mA
V
R
/ I
R
Reverse breakdown
change with current
1mA < I
R
<
12 mA
Z
R
e
n
V
R
Dynamic output
impedance
Noise voltage
-40 to 85°C
-40 to 125°C
25°C
-40 to 85°C
-40 to 125°C
I
R
= 1mA, f = 120Hz
I
AC
= 0.1I
R
I
R
= 100 A
10Hz < f < 10kHz
0.5
60
120
2.5
0.7
±20
±15
±15
1.5
2.0
2.0
6.0
8.0
8.0
1.5
2.0
2.5
2.5
8.0
10.0
10.0
2.0
V
RMS
ppm
mV
±100
±150
ppm/°C
45
Typ. LM4041C LM4041D Units
Limits
Limits
1.225
±6
±14
±18.4
60
65
68
±12
±24
±31
65
70
73
µA
mV
V
Long term stability (non t = 1000Hrs
cumulative)
I
R
= 100 A
Issue 3 - February 2007
© Zetex Semiconductors plc 2007
3
www.zetex.com
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