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FEATURES
Adjustable . . . DBZ (SOT-23) PACKAGE
(TOP VIEW)
FB
CATHODE
ANODE
Adjustable . . . DCK (SC-70) PACKAGE
(TOP VIEW)
NC
NC
1
2
3
1
2
3
5
4
FB
CATHODE
ANODE
Adjustable . . . LP (TO-92/TO-226) PACKAGE
(TOP VIEW)
NC - No internal connection
1.2 V . . . DBZ (SOT-23) PACKAGE
(TOP VIEW)
CATHODE
ANODE
*
1.2 V . . . DCK (SC-70) PACKAGE
(TOP VIEW)
ANODE
NC
1
2
3
1
2
3
5
4
NC
CATHODE
ANODE
1.2 V . . . LP (TO-92/TO-226) PACKAGE
(TOP VIEW)
NC - No internal connection
* Pin 2 must be connected to
ANODE or left open.
* Pin 3 must be connected to
ANODE or left open.
NC - No internal connection
FB
ANODE
CATHODE
NC
CATHODE
*
DESCRIPTION/ORDERING INFORMATION
LM4041
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
SLCS146C FEBRUARY 2005 REVISED MAY 2005
Available in
1.225-V Fixed and Adjustable Outputs
Industrial Temperature: 40
C to 85
C
(1.225 V to 10 V)
Extended Temperature: 40
C to 125
C
Tight Output Tolerances and Low
Applications
Temperature Coefficient
Data-Acquisition Systems
Max 0.1%, 100 ppm/
C A Grade
Power Supplies and Power-Supply Monitors
Max 0.2%, 100 ppm/
C B Grade
Instrumentation and Test Equipment
Max 0.5%, 100 ppm/
C C Grade
Process Control
Max 1.0%, 150 ppm/
C D Grade
Precision Audio
Low Output Noise . . . 20
V
RMS
(Typ)
Automotive Electronics
Wide Operating Current Range . . .
Energy Management/Metering
45
A (Typ) to 12 mA
Battery-Powered Equipment
Stable With All Capacitive Loads; No Output
Capacitor Required
The LM4041 series of shunt voltage references are versatile, easy-to-use references with a vast array of
applications. They require no external resistors or capacitors for operation and are stable with all capacitive
loads. Additionally, the reference offers low dynamic impedance, low noise, and a low temperature coefficient to
ensure a stable output voltage over a wide range of operating currents and temperatures. The LM4041 uses fuse
and Zener-zap reverse breakdown voltage trim during wafer sort to offer four output voltage tolerances, ranging
from 0.1% (max) for the A grade to 1% (max) for the D grade. Thus, a great deal of flexibility is offered to
designers in choosing the best cost-to-performance ratio for their applications. The LM4041 is available in a fixed
(1.225 V nominal) or an adjustable version (which requires an external resistor divider to set the output to a value
between 1.225 V and 10 V).
Packaged in space-saving SC-70 and SOT-23-3 and requiring a minimum current of 45
A (typ), the LM4041
also is ideal for portable applications. The TO-92 package also is available for through-hole packaging needs.
The LM4041xI is characterized for operation over an ambient temperature range of 40
C to 85
C. The
LM4041xQ is characterized for operation over an ambient temperature range of 40
C to 125
C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright 2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
www.ti.com
LM4041
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
SLCS146C FEBRUARY 2005 REVISED MAY 2005
ORDERING INFORMATION
ORDERABLE
TOP-SIDE
T
A
DEVICE GRADE
V
Z
PACKAGE
(1)
PART NUMBER
MARKING
(2)
A grade:
SC-70 (DCK)
Reel of 3000
LM4041A12IDCKR
PREVIEW
0.1% initial
Reel of 3000
LM4041A12IDBZR
accuracy
SOT-23-3 (DBZ)
PREVIEW
Reel of 250
LM4041A12IDBZT
and
1.2 V
100 ppm/
C
Bulk of 1000
LM4041A12ILP
temperature
TO-92/TO-226 (LP)
PREVIEW
Reel of 2000
LM4041A12ILPR
coefficient
SC-70 (DCK)
Reel of 3000
LM4041BIDCKR
PREVIEW
Reel of 3000
LM4041BIDBZR
SOT-23-3 (DBZ)
PREVIEW
ADJ
Reel of 250
LM4041BIDBZT
B grade:
Bulk of 1000
LM4041BILP
0.2% initial
TO-92/TO-226 (LP)
PREVIEW
accuracy
Reel of 2000
LM4041BILPR
and
SC-70 (DCK)
Reel of 3000
LM4041B12IDCKR
PREVIEW
100 ppm/
C
temperature
Reel of 3000
LM4041B12IDBZR
SOT-23-3 (DBZ)
PREVIEW
coefficient
1.2 V
Reel of 250
LM4041B12IDBZT
Bulk of 1000
LM4041B12ILP
TO-92/TO-226 (LP)
PREVIEW
Reel of 2000
LM4041B12ILPR
Reel of 3000
LM4041CIDCKR
SC-70 (DCK)
MH_
Reel of 250
LM4041CIDCKT
Reel of 3000
LM4041CIDBZR
ADJ
SOT-23-3 (DBZ)
4MH_
40
C to 85
C
C grade:
Reel of 250
LM4041CIDBZT
0.5% initial
Bulk of 1000
LM4041CILP
accuracy
TO-92/TO-226 (LP)
PREVIEW
and
Reel of 2000
LM4041CILPR
100 ppm/
C
SC-70 (DCK)
Reel of 3000
LM4041C12IDCKR
MM_
temperature
Reel of 3000
LM4041C12IDBZR
coefficient
SOT-23-3 (DBZ)
4MM_
1.2 V
Reel of 250
LM4041C12IDBZT
Bulk of 1000
LM4041C12ILP
TO-92/TO-226 (LP)
PREVIEW
Reel of 2000
LM4041C12ILPR
Reel of 3000
LM4041DIDCKR
SC-70 (DCK)
MJ_
Reel of 250
LM4041DIDCKT
Reel of 3000
LM4041DIDBZR
ADJ
SOT-23-3 (DBZ)
4MJ_
D grade:
Reel of 250
LM4041DIDBZT
1.0% initial
Bulk of 1000
LM4041DILP
accuracy
TO-92/TO-226 (LP)
PREVIEW
and
Reel of 2000
LM4041DILPR
150 ppm/
C
SC-70 (DCK)
Reel of 3000
LM4041D12IDCKR
MN_
temperature
Reel of 3000
LM4041D12IDBZR
coefficient
SOT-23-3 (DBZ)
4MN_
1.2 V
Reel of 250
LM4041D12IDBZT
Bulk of 1000
LM4041D12ILP
TO-92/TO-226 (LP)
PREVIEW
Reel of 2000
LM4041D12ILPR
(1)
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
(2)
DBZ/DCK: The actual top-side marking has one additional character that designates the assembly/test site.
2
www.ti.com
LM4041
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
SLCS146C FEBRUARY 2005 REVISED MAY 2005
ORDERING INFORMATION
ORDERABLE
TOP-SIDE
T
A
DEVICE GRADE
V
Z
PACKAGE
(1)
PART NUMBER
MARKING
(2)
C grade:
Reel of 3000
LM4041CQDBZR
ADJ
SOT-23-3 (DBZ)
4MP_
0.5% initial
Reel of 250
LM4041CQDBZT
accuracy
Reel of 3000
LM4041C12QDBZR
and
100 ppm/
C
1.2 V
SOT-23-3 (DBZ)
4MS_
temperature
Reel of 250
LM4041C12QDBZT
coefficient
40
C to 125
C
D grade:
Reel of 3000
LM4041DQDBZR
ADJ
SOT-23-3 (DBZ)
4MR_
1.0% initial
Reel of 250
LM4041DQDBZT
accuracy
Reel of 3000
LM4041D12QDBZR
and
150 ppm/
C
1.2 V
SOT-23-3 (DBZ)
4MT_
temperature
Reel of 250
LM4041D12QDBZT
coefficient
(1)
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
(2)
DBZ/DCK: The actual top-side marking has one additional character that designates the assembly/test site.
3
www.ti.com
CATHODE
ANODE
_
+
FB
(1)
(1) LM4041x (ADJ) only
(2) LM4041x12 only
V
REF
(1)
(2)
(2)
Absolute Maximum Ratings
(1)
Recommended Operating Conditions
LM4041
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
SLCS146C FEBRUARY 2005 REVISED MAY 2005
FUNCTIONAL BLOCK DIAGRAM
over free-air temperature range (unless otherwise noted)
MIN
MAX
UNIT
V
Z
Continuous cathode voltage
15
V
I
Z
Continuous cathode current
10
25
mA
DBZ package
206
JA
Package thermal impedance
(2) (3)
DCK package
252
C/W
LP package
156
T
J
Operating virtual junction temperature
150
C
T
stg
Storage temperature range
65
150
C
(1)
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2)
Maximum power dissipation is a function of T
J
(max),
JA
, and T
A
. The maximum allowable power dissipation at any allowable ambient
temperature is P
D
= (T
J
(max) T
A
)/
JA
. Operating at the absolute maximum T
J
of 150
C can affect reliability.
(3)
The package thermal impedance is calculated in accordance with JESD 51-7.
MIN
MAX
UNIT
I
Z
Cathode current
(1)
12
mA
V
Z
Reverse breakdown voltage (adjustable version)
10
V
LM4041 (I temperature)
40
85
T
A
Free-air temperature
C
LM4041 (Q temperature)
40
125
(1)
See parametric tables
4
PDF 
ZIP