NSC LM4050CIM3-8.2

LM4050
Precision Micropower Shunt Voltage Reference
General Description
Features
Ideal for space critical applications, the LM4050 precision
voltage reference is available in the sub-miniature (3 mm x
1.3 mm) SSOT-23 surface-mount package. The LM4050’s
design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load, thus
making the LM4050 easy to use. Further reducing design effort is the availability of several fixed reverse breakdown voltages: 2.500V, 4.096V, 5.000V, 8.192V, and 10.000V. The
minimum operating current increases from 60 µA for the
LM4050-2.5 to 100 µA for the LM4050-10.0. All versions
have a maximum operating current of 15 mA.
The LM4050 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 breakdown voltage accuracy over a wide range of operating temperatures and currents.
All grades and voltage options of the LM4050 operate between −40˚C and +85˚C. Selected parts can operate in the
extended temperature range, from −40˚C and +125˚C.
n
n
n
n
Small packages: SSOT-23
No output capacitor required
Tolerates capacitive loads
Fixed reverse breakdown voltages of 2.500V, 4.096V,
5.000V, 8.192V, and 10.000V
Key Specifications (LM4050-2.5)
n Output voltage tolerance
(A grade, 25˚C)
± 0.1% (max)
n Low output noise
(10 Hz to 10 kHz)
41 µVrms(typ)
n Wide operating current range
60 µA to 15 mA
n Industrial temperature range
−40˚C to +85˚C
n Extended temperature range
−40˚C to +125˚C
n Low temperature coefficient
50 ppm/˚C (max)
Applications
n
n
n
n
n
n
n
n
Portable, Battery-Powered Equipment
Data Acquisition Systems
Instrumentation
Process Control
Energy Management
Product Testing
Automotive
Precision Audio Components
Connection Diagrams
SSOT-23
DS101045-1
*This pin must be left floating or connected to pin 2.
Top View
See NS Package Number MF03A
© 2000 National Semiconductor Corporation
DS101045
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LM4050 Precision Micropower Shunt Voltage Reference
May 2000
LM4050
Ordering Information
Industrial Temperature Range (−40 ˚C to +85 ˚C)
Reverse Breakdown
Voltage Tolerance at 25˚C and Average
Reverse Breakdown
Voltage Temperature Coefficient
± 0.1%, 50 ppm/˚C max (A grade)
± 0.2%, 50 ppm/˚C max (B grade)
± 0.5%, 50 ppm/˚C max (C grade)
LM4050 Supplied as 1000 Units,
Tape and Reel
LM4050 Supplied as 3000 Units,
Tape and Reel
LM4050AIM3-2.5
LM4050AIM3X-2.5
LM4050AIM3-4.1
LM4050AIM3X-4.1
LM4050AIM3-5.0
LM4050AIM3X-5.0
LM4050AIM3-8.2
LM4050AIM3X-8.2
LM4050AIM3-10
LM4050AIM3X-10
LM4050BIM3-2.5
LM4050BIM3X-2.5
LM4050BIM3-4.1
LM4050BIM3X-4.1
LM4050BIM3-5.0
LM4050BIM3X-5.0
LM4050BIM3-8.2
LM4050BIM3X-8.2
LM4050BIM3-10
LM4050BIM3X-10
LM4050CIM3-2.5
LM4050CIM3X-2.5
LM4050CIM3-4.1
LM4050CIM3X-4.1
LM4050CIM3-5.0
LM4050CIM3X-5.0
LM4050CIM3-8.2
LM4050CIM3X-8.2
LM4050CIM3-10
LM4050CIM3X-10
Extended Temperature Range (−40 ˚C to +125 ˚C)
Reverse Breakdown
Voltage Tolerance at 25˚C and Average
Reverse Breakdown
Voltage Temperature Coefficient
LM4050 Supplied as 1000 Units,
Tape and Reel
LM4050 Supplied as 3000 Units,
Tape and Reel
± 0.5%, 50 ppm/˚C max (C grade)
LM4050CEM3-2.5
LM4050CEM3X-2.5
SSOT-23 Package Marking Information
Only three fields of marking are possible on the SSOT-23’s small surface. This table gives the meaning of the three fields.
Part Marking
RCA
RDA
REA
Field Definition
First Field:
R = Reference
Second Field:
RFA
C = 2.500V Voltage Option
RGA
D = 4.096V Voltage Option
RCB
E = 5.000V Voltage Option
RDB
F = 8.192V Voltage Option
REB
G = 10.000V Voltage Option
RFB
RGB
Third Field:
RCC
A–C = Initial Reverse Breakdown Voltage or Reference Voltage Tolerance
RDC
A = ± 0.1%, B = ± 0.2%, C = +0.5%,
REC
RFC
RGC
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2
Machine Model (Note 4)
200V
See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Reverse Current
Forward Current
Power Dissipation (TA = 25˚C) (Note 3)
M3 Package
Storage Temperature (Note 2)
Lead Temperature
M3 Package
Vapor phase (60 seconds)
Infrared (15 seconds)
ESD Susceptibility
Human Body Model (Note 4)
Operating Ratings(Notes 1, 3)
20 mA
10 mA
Temperature Range
Industrial Temperature Range
Extended temperature Range
Reverse Current
LM4050-2.5
LM4050-4.1
LM4050-5.0
LM4050-8.2
LM4050-10.0
280 mW
−65˚C to +150˚C
+215˚C
+220˚C
2 kV
(Tmin ≤ TA ≤ Tmax)
−40˚C ≤ TA ≤ +85˚C
−40˚C ≤ TA ≤ +125˚C
60
68
74
91
100
µA
µA
µA
µA
µA
to
to
to
to
to
15
15
15
15
15
mA
mA
mA
mA
mA
LM4050-2.5
Electrical Characteristics
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C. The grades A, B and C designate initial Reverse Breakdown Voltage tolerances of ± 0.1%, ± 0.2%, and 0.5% respectively.
Symbol
VR
Parameter
Reverse Breakdown
Voltage
Conditions
IR = 100 µA
Typical LM4050AIM3 LM4050BIM3 LM4050CIM3
(Note 5)
Limits
Limits
LM4050CEM3
(Note 6)
(Note 6)
Limits
(Note 6)
2.500
Reverse Breakdown
IR = 100 µA
Voltage Tolerance (Note 7) Industrial Temp. Range
Devices
V
± 2.5
± 5.0
± 13
mV (max)
± 11
± 14
± 21
mV (max)
± 25
mV (max)
Extended Temp. Range
Devices
IRMIN
Minimum Operating Current
41
∆VR/∆T Average Reverse
Breakdown Voltage
Temperature Coefficient
(Note 7)
IR = 10 mA
± 20
IR = 1 mA
± 15
IR = 100 µA
± 15
∆VR/∆IR Reverse Breakdown
Voltage Change with
Operating Current Change
(Note 8)
IRMIN ≤ IR ≤ 1 mA
0.3
1 mA ≤ IR ≤ 15 mA
Units
(Limit)
µA
60
60
60
µA (max)
65
65
65
µA (max)
ppm/˚C
ppm/˚C
± 50
± 50
± 50
ppm/˚C (max)
mV
0.8
0.8
0.8
mV (max)
1.2
1.2
1.2
mV (max)
6.0
6.0
6.0
mV (max)
8.0
8.0
8.0
mV (max)
2.3
mV
ZR
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.3
Ω
eN
Wideband Noise
IR = 100 µA
41
µVrms
∆VR
Reverse Breakdown
t = 1000 hrs
Voltage Long Term Stability T = 25˚C ± 0.1˚C
IR = 100 µA
120
ppm
0.7
mV
10 Hz ≤ f ≤ 10 kHz
VHYST
Output Hysteresis
∆T = −40˚C to 125˚C
3
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LM4050
Absolute Maximum Ratings (Note 1)
LM4050
LM4050-4.1
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C. The grades A, B and C designate initial Reverse Breakdown Voltage tolerances of ± 0.1%, ± 0.2%, and 0.5% respectively.
LM4050AIM3 LM4050BIM3 LM4050CIM3
Symbol
VR
Parameter
Reverse Breakdown
Voltage
Conditions
IR = 100 µA
Typical
(Note 5)
Limits
Limits
Limits
(Note 6)
(Note 6)
(Note 6)
4.096
Reverse Breakdown
IR = 100 µA
Voltage Tolerance (Note 7)
IRMIN
Units
(Limit)
Minimum Operating Current
V
± 4.1
± 18
± 8.2
± 22
± 21
± 34
mV (max)
68
68
68
µA (max)
73
73
73
µA (max)
52
mV (max)
µA
∆VR/∆T Average Reverse
Breakdown Voltage
Temperature
Coefficient(Note 7)
IR = 10 mA
± 30
ppm/˚C
IR = 1 mA
± 20
ppm/˚C
IR = 100 µA
± 20
∆VR/∆IR Reverse Breakdown
Voltage Change with
Operating Current Change
(Note 8)
IRMIN ≤ IR ≤ 1 mA
0.2
ZR
1 mA ≤ IR ≤ 15 mA
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
eN
Wideband Noise
IR = 100 µA
∆VR
Reverse Breakdown
t = 1000 hrs
Voltage Long Term Stability T = 25˚C ± 0.1˚C
IR = 100 µA
VHYST
Output Hysteresis
± 50
± 50
± 50
ppm/˚C (max)
0.9
0.9
0.9
mV (max)
1.2
1.2
1.2
mV (max)
7.0
7.0
7.0
mV (max)
10.0
10.0
10.0
mV (max)
mV
2.0
mV
0.5
Ω
93
µVrms
120
ppm
1.148
mV
IAC = 0.1 IR
10 Hz ≤ f ≤ 10 kHz
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∆T = −40˚C to 125˚C
4
LM4050
LM4050-5.0
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C. The grades A, B and C designate initial Reverse Breakdown Voltage tolerances of ± 0.1%, ± 0.2% and 0.5% respectively.
LM4050AIM3 LM4050BIM3 LM4050CIM3
Symbol
VR
Parameter
Reverse Breakdown
Voltage
Conditions
IR = 100 µA
Typical
(Note 5)
Limits
Limits
(Note 6)
(Note 6)
Minimum Operating Current
Units
(Limit)
(Note 6)
5.000
Reverse Breakdown
IR = 100 µA
Voltage Tolerance (Note 7)
IRMIN
Limits
V
± 5.0
± 22
± 10
± 27
± 25
± 42
mV (max)
74
74
74
µA (max)
80
80
80
µA (max)
56
mV (max)
µA
∆VR/∆T Average Reverse
Breakdown Voltage
Temperature Coefficient
(Note 7)
IR = 10 mA
± 30
ppm/˚C
IR = 1 mA
± 20
ppm/˚C
IR = 100 µA
± 20
∆VR/∆IR Reverse Breakdown
Voltage Change with
Operating Current Change
(Note 8)
IRMIN ≤ IR ≤ 1 mA
0.2
1 mA ≤ IR ≤ 15 mA
ZR
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
eN
Wideband Noise
IR = 100 µA
∆VR
Reverse Breakdown
t = 1000 hrs
Voltage Long Term Stability T = 25˚C ± 0.1˚C
± 50
± 50
± 50
mV
1.0
1.0
1.0
mV (max)
1.4
1.4
1.4
mV (max)
8.0
8.0
8.0
mV (max)
12.0
12.0
12.0
mV (max)
2.0
0.5
ppm/˚C (max)
mV
Ω
Ω (max)
IAC = 0.1 IR
93
µVrms
120
ppm
1.4
mV
10 Hz ≤ f ≤ 10 kHz
IR = 100 µA
VHYST Output Hysteresis
∆T = −40˚C to 125˚C
5
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LM4050
LM4050-8.2
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C. The grades A, B and C designate initial Reverse Breakdown Voltage tolerances of ± 0.1% and ± 0.2% and 0.5% respectively.
LM4050AIM3 LM4050BIM3 LM4050CIM3
Symbol
VR
Parameter
Reverse Breakdown
Voltage
Conditions
IR = 150 µA
Typical
(Note 5)
Minimum Operating Current
Limits
Limits
(Note 6)
(Note 6)
(Note 6)
V
± 8.2
± 35
± 16
± 43
± 41
± 68
mV (max)
91
91
91
µA (max)
95
95
95
µA (max)
74
∆VR/∆T Average Reverse
Breakdown Voltage
Temperature
Coefficient(Note 7)
IR = 10 mA
IR = 150 µA
± 40
± 20
± 20
∆VR/∆IR Reverse Breakdown
Voltage Change with
Operating Current Change
(Note 8)
IRMIN ≤ IR ≤ 1 mA
0.6
IR = 1 mA
1 mA ≤ IR ≤ 15 mA
ZR
Limits
8.192
Reverse Breakdown
IR = 150 µA
Voltage Tolerance (Note 7)
IRMIN
Units
(Limit)
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
eN
Wideband Noise
IR = 150 µA
∆VR
Reverse Breakdown
t = 1000 hrs
Voltage Long Term Stability T = 25˚C ± 0.1˚C
mV (max)
µA
ppm/˚C
ppm/˚C
± 50
± 50
± 50
ppm/˚C
(max)
mV
1.3
1.3
1.3
mV (max)
2.5
2.5
2.5
mV (max)
10.0
10.0
10.0
mV (max)
18.0
18.0
18.0
mV (max)
7.0
mV
0.6
Ω
150
µVrms
120
ppm
2.3
mV
IAC = 0.1 IR
10 Hz ≤ f ≤ 10 kHz
IR = 150 µA
VHYST
Output Hysteresis
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∆T = −40˚C to 125˚C
6
LM4050
LM4050-10.0
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C. The grades A, B and C designate initial Reverse Breakdown Voltage tolerances of ± 0.1% and ± 0.2% and 0.5% respectively.
LM4050AIM3 LM4050BIM3 LM4050CIM3
Symbol
VR
Parameter
Reverse Breakdown
Voltage
Conditions
IR = 150 µA
Typical
(Note 5)
Minimum Operating Current
Limits
Limits
(Note 6)
(Note 6)
(Note 6)
V
± 10
± 43
± 20
± 53
± 50
± 83
mV (max)
100
100
100
µA (max)
103
103
103
µA (max)
mV (max)
80
∆VR/∆T Average Reverse
Breakdown Voltage
Temperature Coefficient
(Note 7)
IR = 10 mA
IR = 150 µA
± 40
± 20
± 20
∆VR/∆IR Reverse Breakdown
Voltage Change with
Operating Current Change
(Note 8)
IRMIN ≤ IR ≤ 1 mA
0.8
IR = 1 mA
1 mA ≤ IR ≤ 15 mA
ZR
Limits
10.00
Reverse Breakdown
IR = 150 µA
Voltage Tolerance (Note 7)
IRMIN
Units
(Limit)
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
eN
Wideband Noise
IR = 150 µA
∆VR
Reverse Breakdown
t = 1000 hrs
Voltage Long Term Stability T = 25˚C ± 0.1˚C
µA
ppm/˚C
ppm/˚C
± 50
± 50
± 50
ppm/˚C
(max)
mV
1.5
1.5
1.5
mV (max)
3.5
3.5
3.5
mV (max)
12.0
12.0
12.0
mV (max)
23.0
23.0
23.0
mV (max)
8.0
mV
0.7
Ω
150
µVrms
120
ppm
2.8
mV
IAC = 0.1 IR
10 Hz ≤ f ≤ 10 kHz
IR = 150 µA
VHYST
Output Hysteresis
∆T = −40˚C to 125˚C
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 conditions.
Note 2: If parts are exposed to temperatures outside the specific operating temperature range, the output may shift due to hysteresis.
Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature), θJA (junction to ambient 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 LM4050, TJmax = 125˚C, and the typical thermal resistance (θJA), when board mounted, is
326˚C/W for the SSOT-23 package.
Note 4: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged directly into each pin.
Note 5: Typicals are at TJ = 25˚C and represent most likely parametric norm.
Note 6: 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 7: The boldface (over-temperature) limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown Voltage Tolerance
± [(∆V R/∆T)(max∆T)(VR)]. Where, ∆VR/∆T is the VR temperature coefficient, max∆T 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 max∆T
= 65˚C is shown below:
A-grade: ± 0.425% = ± 0.1% ± 50 ppm/˚C x 65˚C
B-grade: ± 0.525% = ± 0.2% ± 50 ppm/˚C x 65˚C
C-grade: ± 0.825% = ± 0.5% ± 50 ppm/˚C x 65˚C
Therefore, as an example, the A-grade LM4050-2.5 has an over-temperature Reverse Breakdown Voltage tolerance of ± 2.5V x 0.425% = ± 11 mV.
Note 8: Load regulation is measured on pulse basis from no load to the specified load current. Output changes due to die temperature change must be taken into
account separately.
7
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LM4050
Typical Performance Characteristics
Output Impedance vs Frequency
Output Impedance vs Frequency
DS101045-10
Reverse Characteristics and
Minimum Operating Current
DS101045-11
Noise Voltage vs Frequency
DS101045-12
DS101045-13
Thermal Hysteresis
DS101045-29
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8
LM4050
Start-Up Characteristics
LM4050-2.5
RS = 30k
LM4050-10.0
RS = 30k
DS101045-5
DS101045-7
LM4050-5.0
RS = 30k
DS101045-8
DS101045-9
Functional Block Diagram
DS101045-14
9
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LM4050
Applications Information
The LM4050 is a precision micro-power curvature-corrected
bandgap shunt voltage reference. For space critical applications, the LM4050 is available in the sub-miniature SSOT-23
surface-mount package. The LM4050 has been designed for
stable operation without the need of an external capacitor
connected between the “+” pin and the “−” pin. If, however, a
bypass capacitor is used, the LM4050 remains stable. Reducing design effort is the availability of several fixed reverse
breakdown voltages: 2.500V, 4.096V, 5.000V, 8.192V, and
10.000V. The minimum operating current increases from
60 µA for the LM4050-2.5 to 100 µA for the LM4050-10.0. All
versions have a maximum operating current of 15 mA.
LM4050s in the SSOT-23 packages have a parasitic Schottky diode between pin 2 (−) and pin 3 (Die attach interface
contact). Therefore, pin 3 of the SSOT-23 package must be
left floating or connected to pin 2.
The 4.096V version allows single +5V 12-bit ADCs or DACs
to operate with an LSB equal to 1 mV. For 12-bit ADCs or
DACs that operate on supplies of 10V or greater, the 8.192V
version gives 2 mV per LSB.
In a conventional shunt regulator application (Figure 1) , an
external series resistor (RS) is connected between the supply voltage and the LM4050. RS determines the current that
flows through the load (IL) and the LM4050 (IQ). Since load
current and supply voltage may vary, RS should be small
enough to supply at least the maximum guaranteed IRMIN
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(spec. table) to the LM4050 even when the supply voltage is
at its minimum and the load current is at its maximum value.
When the supply voltage is at its maximum and IL is at its
minimum, RS should be large enough so that the current
flowing through the LM4050 is less than 15 mA.
RS is determined by the supply voltage, (VS), the load and
operating current, (IL and IQ), and the LM4050’s reverse
breakdown voltage, VR.
Typical Applications
DS101045-15
FIGURE 1. Shunt Regulator
10
LM4050
Typical Applications
(Continued)
DS101045-16
**Ceramic monolithic
*Tantalum
FIGURE 2. LM4050-4.1’s Nominal 4.096 breakdown voltage gives ADC12451 1 mV/LSB
11
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LM4050
Typical Applications
(Continued)
DS101045-17
FIGURE 3. Bounded amplifier reduces saturation-induced delays and can prevent succeeding stage damage.
Nominal clamping voltage is ± 11.5V (LM4050’s reverse breakdown voltage +2 diode VF).
DS101045-18
FIGURE 4. Protecting Op Amp input. The bounding voltage is ± 4V with the LM4050-2.5
(LM4050’s reverse breakdown voltage + 3 diode VF).
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12
LM4050
Typical Applications
(Continued)
DS101045-19
FIGURE 5. Precision ± 4.096V Reference
DS101045-22
DS101045-21
FIGURE 6. Precision 1 µA to 1 mA Current Sources
13
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LM4050 Precision Micropower Shunt Voltage Reference
Physical Dimensions
inches (millimeters) unless otherwise noted
Plastic Surface Mount Package (M3)
NS Package Number MF03A
(JEDEC Registration TO-236AB)
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