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PDF ( 数据手册 , 数据表 ) LM4040

零件编号 LM4040
描述 Precision Micropower Shunt Voltage Reference
制造商 National Semiconductor
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LM4040 数据手册, 描述, 功能
September 1998
LM4040
Precision Micropower Shunt Voltage Reference
General Description
Ideal for space critical applications, the LM4040 precision
voltage reference is available in the sub-miniature (3 mm x
1.3 mm) SOT-23 surface-mount package. The LM4040’s ad-
vanced design eliminates the need for an external stabilizing
capacitor while ensuring stability with any capacitive load,
thus making the LM4040 easy to use. Further reducing de-
sign effort is the availability of several fixed reverse break-
down voltages: 2.500V, 4.096V, 5.000V, 8.192V, and
10.000V. The minimum operating current increases from
60 µA for the LM4040-2.5 to 100 µA for the LM4040-10.0. All
versions have a maximum operating current of 15 mA.
The LM4040 utilizes fuse and zener-zap reverse breakdown
voltage trim during wafer sort to ensure that the prime parts
have an accuracy of better than ±0.1% (A grade) at 25˚C.
Bandgap reference temperature drift curvature correction
and low dynamic impedance ensure stable reverse break-
down voltage accuracy over a wide range of operating tem-
peratures and currents.
Also available is the LM4041 with two reverse breakdown
voltage versions: adjustable and 1.2V. Please see the
LM4041 data sheet.
Features
n Small packages: SOT-23, TO-92
n No output capacitor required
n Tolerates capacitive loads
n Fixed reverse breakdown voltages of 2.500V, 4.096V,
5.000V, 8.192V, and 10.000V
Key Specifications (LM4040-2.5)
n Output voltage tolerance
(A grade, 25˚C)
n Low output noise
(10 Hz to 10 kHz)
n Wide operating current range
n Industrial temperature range
n Extended temperature range
n Low temperature coefficient
±0.1% (max)
35 µVrms(typ)
60 µA to 15 mA
−40˚C to +85˚C
−40˚C to +125˚C
100 ppm/˚C (max)
Applications
n Portable, Battery-Powered Equipment
n Data Acquisition Systems
n Instrumentation
n Process Control
n Energy Management
n Product Testing
n Automotive
n Precision Audio Components
Connection Diagrams
SOT-23
TO-92
DS011323-1
*This pin must be left floating or connected to pin 2.
Top View
See NS Package Number M03B
(JEDEC Registration TO-236AB)
DS011323-3
Bottom View
See NS Package Number Z03A
© 1998 National Semiconductor Corporation DS011323
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LM4040 pdf, 数据表
LM4040-4.1
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for
verse Breakdown Voltage
TA = TJ =
tolerances
oTfM±IN0.t5o%TaMnAdX;±a1ll.0o%th,errelsimpeitcstiTvAely=.
TJ
=
25˚C.
The
grades
C
and
D
designate
initial
Re-
Symbol
Parameter
Conditions
VR
IRMIN
Reverse Breakdown
Voltage
Reverse Breakdown
Voltage Tolerance (Note 6)
Minimum Operating Current
IR = 100 µA
IR = 100 µA
VR/T Average Reverse
Breakdown Voltage
Temperature Coefficient
(Note 6)
VR/IR Reverse Breakdown
Voltage Change with
Operating Current Change
IR = 10 mA
IR = 1 mA
IR = 100 µA
IRMIN IR 1 mA
1 mA IR 15 mA
ZR Reverse Dynamic
Impedance
eN Wideband Noise
IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
IR = 100 µA
10 Hz f 10 kHz
VR Reverse Breakdown
t = 1000 hrs
Voltage Long Term Stability T = 25˚C ±0.1˚C
IR = 100 µA
Typical
(Note 4)
4.096
LM4040CIM3
LM4040CIZ
Limits
(Note 5)
LM4040DIM3
LM4040DIZ
Limits
(Note 5)
Units
(Limit)
V
±20
±47
50
68
73
±30
±20 ±100
±20
0.5
0.9
1.2
3.0
7.0
10.0
0.5
1.0
80
±41
±81
73
78
±150
1.2
1.5
9.0
13.0
1.3
mV (max)
mV (max)
µA
µA (max)
µA (max)
ppm/˚C
ppm/˚C (max)
ppm/˚C
mV
mV (max)
mV (max)
mV
mV (max)
mV (max)
(max)
µVrms
120 ppm
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8







LM4040 equivalent, schematic
Electrical Characteristics(Notes)
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test condi-
tions.
Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature), θJA (junction to am-
bient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is PDmax = (TJmax − TA)/θJA or the number
given in the Absolute Maximum Ratings, whichever is lower. For the LM4040, TJmax = 125˚C, and the typical thermal resistance (θJA), when board mounted, is
326˚C/W for the SOT-23 package, and 180˚C/W with 0.4" lead length and 170˚C/W with 0.125" lead length for the TO-92 package.
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 kresistor into each pin. The machine model is a 200 pF capacitor discharged di-
rectly into each pin.
Note 4: Typicals are at TJ = 25˚C and represent most likely parametric norm.
Note 5: Limits are 100% production tested at 25˚C. Limits over temperature are guaranteed through correlation using Statistical Quality Control (SQC) methods.
The limits are used to calculate National’s AOQL.
Note 6: The boldface (over-temperature) limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown Voltage Tolerance
±[(VR/T)(maxT)(VR)]. Where, VR/T is the VR temperature coefficient, maxT is the maximum difference in temperature from the reference point of 25˚C to
T MIN or TMAX, and VR is the reverse breakdown voltage. The total over-temperature tolerance for the different grades in the industrial temperature range where
maxT = 65˚C is shown below:
A-grade: ±0.75% = ±0.1% ±100 ppm/˚C x 65˚C
B-grade: ±0.85% = ±0.2% ±100 ppm/˚C x 65˚C
C-grade: ±1.15% = ±0.5% ±100 ppm/˚C x 65˚C
D-grade: ±1.98% = ±1.0% ±150 ppm/˚C x 65˚C
E-grade: ±2.98% = ±2.0% ±150 ppm/˚C x 65˚C
The total over-temperature tolerance for the different grades in the exteded temperature range where max T = 100 ˚C is shown below:
C-grade: ±1.5% = ±0.5% ±100 ppm/˚C x 100˚C
D-grade: ±2.5% = ±1.0% ±150 ppm/˚C x 100˚C
E-grade: ±4.5% = ±2.0% ±150 ppm/˚C x 100˚C
Therefore, as an example, the A-grade LM4040-2.5 has an over-temperature Reverse Breakdown Voltage tolerance of ±2.5V x 0.75% = ±19 mV.
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