LM4050CIM3X-4.1 [TI]
LM4050/LM4050Q Precision Micropower Shunt Voltage Reference; LM4050 / LM4050Q精密微功耗并联型电压基准
| 型号： | LM4050CIM3X-4.1 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | LM4050/LM4050Q Precision Micropower Shunt Voltage Reference |
| 文件： | 总20页 (文件大小：324K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM4050
LM4050/LM4050Q Precision Micropower Shunt Voltage Reference
Literature Number: SNOS455D
November 10, 2011
LM4050/LM4050Q
Precision Micropower Shunt Voltage Reference
General Description
Key Specifications (LM4050-2.5)
Ideal for space critical applications, the LM4050 precision
voltage reference is available in the sub-miniature (3 mm x
1.3 mm) SOT-23 surface-mount package. The LM4050's de-
sign 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:
2.048V, 2.500V, 4.096V, 5.000V, 8.192V, and 10.000V. The
minimum operating current increases from 60 μA for the
LM4050-2.0 to 100 μA for the LM4050-10.0. All versions have
a maximum operating current of 15 mA.
■ꢀOutput voltage tolerance
ꢀꢀ (A grade, 25°C)
■ꢀLow output noise
±0.1% (max)
41 μVrms(typ)
60 μA to 15 mA
−40°C to +85°C
−40°C to +125°C
50 ppm/°C (max)
ꢀꢀ(10 Hz to 10 kHz)
■ꢀWide operating current range
■ꢀIndustrial temperature range
■ꢀExtended temperature range
■ꢀLow temperature coefficient
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 tempera-
tures and currents.
■ꢀLM4050QA/QB/QC are AEC-
Q100 Grade 1 qualified and are
manufactured on an automotive
grade flow
Applications
All grades and voltage options of the LM4050 are available in
both an industrial temperature range (−40°C and +85°C) and
an extended temperature range (−40°C and +125°C).
Portable, Battery-Powered Equipment
■
■
■
■
■
■
■
■
Data Acquisition Systems
Instrumentation
Process Control
Features
Energy Management
Small packages: SOT-23
■
■
■
■
Product Testing
No output capacitor required
Automotive
Tolerates capacitive loads
Precision Audio Components
Fixed reverse breakdown voltages of 2.048V, 2.500V,
4.096V, 5.000V, 8.192V, and 10.000V
Connection Diagram
SOT-23
10104501
*This pin must be left floating or connected to pin 2.
Top View
See NS Package Number MF03A
© 2011 Texas Instruments Incorporated
101045
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Ordering Information
Industrial Temperature Range (−40°C to +85°C)
Reverse Breakdown
Voltage Tolerance at 25°C and Average Reverse LM4050 Supplied as 1000 Units, Tape LM4050 Supplied as 3000 Units, Tape
Breakdown
and Reel
and Reel
Voltage Temperature Coefficient
LM4050AIM3-2.0
LM4050AIM3-2.5
LM4050AIM3-4.1
LM4050AIM3-5.0
LM4050AIM3-8.2
LM4050AIM3-10
LM4050BIM3-2.0
LM4050BIM3-2.5
LM4050BIM3-4.1
LM4050BIM3-5.0
LM4050BIM3-8.2
LM4050BIM3-10
LM4050CIM3-2.0
LM4050CIM3-2.5
LM4050CIM3-4.1
LM4050CIM3-5.0
LM4050CIM3-8.2
LM4050CIM3-10
LM4050AIM3X-2.0
LM4050AIM3X-2.5
LM4050AIM3X-4.1
LM4050AIM3X-5.0
LM4050AIM3X-8.2
LM4050AIM3X-10
LM4050BIM3X-2.0
LM4050BIM3X-2.5
LM4050BIM3X-4.1
LM4050BIM3X-5.0
LM4050BIM3X-8.2
LM4050BIM3X-10
LM4050CIM3X-2.0
LM4050CIM3X-2.5
LM4050CIM3X-4.1
LM4050CIM3X-5.0
LM4050CIM3X-8.2
LM4050CIM3X-10
±0.1%, 50 ppm/°C max (A grade)
±0.2%, 50 ppm/°C max (B grade)
±0.5%, 50 ppm/°C max (C grade)
Extended Temperature Range (−40°C to +125°C)
Reverse Breakdown
Voltage Tolerance at 25°C and Average Reverse LM4050 Supplied as 1000 Units, Tape LM4050 Supplied as 3000 Units, Tape
Breakdown
and Reel
and Reel
Voltage Temperature Coefficient
LM4050AEM3-2.0
LM4050AEM3-2.5
LM4050AEM3-4.1
LM4050AEM3-5.0
LM4050AEM3-8.2
LM4050AEM3-10
LM4050BEM3-2.0
LM4050BEM3-2.5
LM4050BEM3-4.1
LM4050BEM3-5.0
LM4050BEM3-8.2
LM4050BEM3-10
LM4050CEM3-2.0
LM4050CEM3-2.5
LM4050CEM3-4.1
LM4050CEM3-5.0
LM4050CEM3-8.2
LM4050CEM3-10
LM4050AEM3X-2.0
LM4050AEM3X-2.5
LM4050AEM3X-4.1
LM4050AEM3X-5.0
LM4050AEM3X-8.2
LM4050AEM3X-10
LM4050BEM3X-2.0
LM4050BEM3X-2.5
LM4050BEM3X-4.1
LM4050BEM3X-5.0
LM4050BEM3X-8.2
LM4050BEM3X-10
LM4050CEM3X-2.0
LM4050CEM3X-2.5
LM4050CEM3X-4.1
LM4050CEM3X-5.0
LM4050CEM3X-8.2
LM4050CEM3X-10
±0.1%, 50 ppm/°C max (A grade)
±0.2%, 50 ppm/°C max (B grade)
±0.5%, 50 ppm/°C max (C grade)
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2
Industrial Temperature Range (−40°C to +85°C)
Reverse Breakdown
Voltage Tolerance at 25°C and Average Reverse LM4050Q Supplied as 1000 Units,
LM4050Q Supplied as 3000 Units,
Tape and Reel
Breakdown
Tape and Reel
Voltage Temperature Coefficient
LM4050QAIM3-2.0
LM4050QAIM3-2.5
LM4050QAIM3-4.1
LM4050QAIM3-5.0
LM4050QAIM3-8.2
LM4050QAIM3-10
LM4050QBIM3-2.0
LM4050QBIM3-2.5
LM4050QBIM3-4.1
LM4050QBIM3-5.0
LM4050QBIM3-8.2
LM4050QBIM3-10
LM4050QCIM3-2.0
LM4050QCIM3-2.5
LM4050QCIM3-4.1
LM4050QCIM3-5.0
LM4050QCIM3-8.2
LM4050QCIM3-10
LM4050QAIM3X2.0
LM4050QAIM3X2.5
LM4050QAIM3X4.1
LM4050QAIM3X5.0
LM4050QAIM3X8.2
LM4050QAIM3X10
LM4050QBIM3X2.0
LM4050QBIM3X2.5
LM4050QBIM3X4.1
LM4050QBIM3X5.0
LM4050QBIM3X8.2
LM4050QBIM3X10
LM4050QCIM3X2.0
LM4050QCIM3X2.5
LM4050QCIM3X4.1
LM4050QCIM3X5.0
LM4050QCIM3X8.2
LM4050QCIM3X10
±0.1%, 50 ppm/°C max (Q A grade)
±0.2%, 50 ppm/°C max (Q B grade)
±0.5%, 50 ppm/°C max (Q C grade)
Extended Temperature Range (−40°C to +125°C)
Reverse Breakdown
Voltage Tolerance at 25°C and Average Reverse LM4050Q Supplied as 1000 Units,
LM4050Q Supplied as 3000 Units,
Tape and Reel
Breakdown
Tape and Reel
Voltage Temperature Coefficient
LM4050QAEM3-2.0
LM4050QAEM3-2.5
LM4050QAEM3-4.1
LM4050QAEM3-5.0
LM4050QAEM3-8.2
LM4050QAEM3-10
LM4050QBEM3-2.0
LM4050QBEM3-2.5
LM4050QBEM3-4.1
LM4050QBEM3-5.0
LM4050QBEM3-8.2
LM4050QBEM3-10
LM4050QCEM3-2.0
LM4050QCEM3-2.5
LM4050QCEM3-4.1
LM4050QCEM3-5.0
LM4050QCEM3-8.2
LM4050QCEM3-10
LM4050QAEM3X2.0
LM4050QAEM3X2.5
LM4050QAEM3X4.1
LM4050QAEM3X5.0
LM4050QAEM3X8.2
LM4050QAEM3X10
LM4050QBEM3X2.0
LM4050QBEM3X2.5
LM4050QBEM3X4.1
LM4050QBEM3X5.0
LM4050QBEM3X8.2
LM4050QBEM3X10
LM4050QCEM3X2.0
LM4050QCEM3X2.5
LM4050QCEM3X4.1
LM4050QCEM3X5.0
LM4050QCEM3X8.2
LM4050QCEM3X10
±0.1%, 50 ppm/°C max (Q A grade)
±0.2%, 50 ppm/°C max (Q B grade)
±0.5%, 50 ppm/°C max (Q C grade)
3
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SOT-23 Package Marking Information
Only three fields of marking are possible on the SOT-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
N = 2.048V Voltage Option
C = 2.500V Voltage Option
D = 4.096V Voltage Option
E = 5.000V Voltage Option
F = 8.192V Voltage Option
G = 10.000V Voltage Option
ꢁ
RGA
RNA
RCB
RDB
REB
RFB
RGB
RNB
RCC
RDC
REC
RFC
Third Field:
A–C = Initial Reverse Breakdown Voltage or Reference Voltage Tolerance
A = ±0.1%, B = ±0.2%, C = +0.5%,
RGC
RNC
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4
Machine Model (Note 3)
200V
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the Texas Instruments Sales Office/
Distributors for availability and specifications.
See AN-450 “Surface Mounting Methods and Their Effect on
Product Reliability” for other methods of soldering surface
mount devices.
Reverse Current
Forward Current
Power Dissipation (TA = 25°C) (Note 2)
M3 Package
Storage Temperature
Lead Temperature
20 mA
10 mA
Operating Ratings (Note 2)
Temperature Range
(Tmin ≤ TA ≤ Tmax
)
Industrial Temperature
Range
Extended temperature
Range
280 mW
−65°C to +150°C
−40°C ≤ TA ≤ +85°C
−40°C ≤ TA ≤ +125°C
M3 Package
Reverse Current
LM4050-2.0,
LM4050-2.5
LM4050-4.1
LM4050-5.0
LM4050-8.2
LM4050-10.0
Vapor phase (60 seconds)
Infrared (15 seconds)
ESD Susceptibility
+215°C
+220°C
60 μA to 15 mA
60 μA to 15 mA
68 μA to 15 mA
74 μA to 15 mA
91 μA to 15 mA
100 μA to 15 mA
Human Body Model (Note 3)
2 kV
LM4050-2.0
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.
LM4050CIM
LM4050AIM3 LM4050BIM3
3
LM4050AEM LM4050BEM
Typical
(Note 4)
LM4050CEM
3
Limits
(Note 5)
Units
(Limit)
Symbol
Parameter
Conditions
3
3
Limits
(Note 5)
Limits
(Note 5)
Reverse Breakdown
Voltage
2.048
IR = 100 μA
VR
V
Reverse Breakdown
Voltage Tolerance (Note 6)
±2.048
±4.096
±10.24
IR = 100 μA
mV (max)
mV (max)
Industrial Temp. Range
Extended Temp.
Range
±9.0112
±11.4688
±14.7456
mV (max)
±12.288
±14.7456
±17.2032
IRMIN
Minimum Operating Current
41
μA
60
60
60
μA (max)
μA (max)
ppm/°C
ppm/°C
65
65
65
Average Reverse
Breakdown Voltage
Temperature Coefficient
(Note 6)
IR = 10 mA
IR = 1 mA
±20
±15
±15
ΔVR/ΔT
IR = 100 μA
±50
±50
±50
ppm/°C (max)
Reverse Breakdown
Voltage Change with
Operating Current Change
(Note 7)
0.3
ΔVR/ΔIR
mV
IRMIN ≤ IR ≤ 1 mA
1 mA ≤ IR ≤ 15 mA
0.8
0.8
0.8
mV (max)
1.2
1.2
1.2
mV (max)
2.3
mV
6.0
6.0
6.0
mV (max)
mV (max)
8.0
8.0
8.0
ZR
eN
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.3
34
Ω
Wideband Noise
IR = 100 μA
μVrms
10 Hz ≤ f ≤ 10 kHz
5
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LM4050CIM
LM4050AIM3 LM4050BIM3
LM4050AEM LM4050BEM
3
LM4050CEM
3
Limits
(Note 5)
Typical
(Note 4)
Units
(Limit)
Symbol
Parameter
Conditions
3
3
Limits
(Note 5)
Limits
(Note 5)
Reverse Breakdown
Voltage Long Term Stability T = 25°C ±0.1°C
t = 1000 hrs
ΔVR
120
0.7
ppm
mV
IR = 100 μA
VHYST
Thermal Hysteresis
(Note 8)
ΔT = −40°C to 125°C
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.
LM4050AI LM4050BI LM4050CI
M3
M3
M3
Typical LM4050AE LM4050BE LM4050CE
Units
(Limit)
Symbol
Parameter
Conditions
(Note 4)
M3
M3
M3
Limits
(Note 5)
Limits
(Note 5)
Limits
(Note 5)
Reverse Breakdown Voltage
2.500
VR
IR = 100 μA
V
Reverse Breakdown Voltage
Tolerance (Note 6)
±2.5
±5.0
±13
IR = 100 μA
Industrial Temp. Range
Extended Temp. Range
mV (max)
mV (max)
mV (max)
±11
±15
±14
±18
±21
±25
IRMIN
Minimum Operating Current
41
μA
60
60
60
μA (max)
μA (max)
ppm/°C
65
65
65
Average Reverse Breakdown IR = 10 mA
±20
±15
±15
ΔVR/ΔT
ΔVR/ΔIR
Voltage Temperature
Coefficient (Note 6)
IR = 100 μA
IR = 1 mA
ppm/°C
±50
±50
±50
ppm/°C (max)
Reverse Breakdown Voltage
Change with Operating
0.3
mV
IRMIN ≤ IR ≤ 1 mA
0.8
0.8
0.8
mV (max)
mV (max)
Current Change (Note 7)
1.2
1.2
1.2
2.3
mV
1 mA ≤ IR ≤ 15 mA
6.0
6.0
6.0
mV (max)
mV (max)
8.0
8.0
8.0
ZR
eN
Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.3
41
Ω
Wideband Noise
IR = 100 μA
μVrms
10 Hz ≤ f ≤ 10 kHz
Reverse Breakdown Voltage t = 1000 hrs
ΔVR
Long Term Stability
T = 25°C ±0.1°C
120
0.7
ppm
mV
IR = 100 μA
VHYST
Thermal Hysteresis
(Note 8)
ΔT = −40°C to 125°C
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6
LM4050-4.1
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.
LM4050AI LM4050BI LM4050CI
M3
M3
M3
Typical LM4050AE LM4050BE LM4050CE
Units
(Limit)
Symbol
Parameter
Conditions
(Note 4)
M3
M3
M3
Limits
(Note 5)
Limits
(Note 5)
Limits
(Note 5)
VR
Reverse Breakdown Voltage
IR = 100 μA
4.096
V
Reverse Breakdown Voltage
Tolerance (Note 6)
IR = 100 μA
Industrial Temp. Range
Extended Temp. Range
±4.1
±18
±25
±8.2
±22
±29
±21
±34
±41
mV (max)
mV (max)
mV (max)
IRMIN
Minimum Operating Current
52
μA
68
73
78
68
73
78
68
73
78
μA (max)
μA (max)
μA (max)
ppm/°C
Industrial Temp. Range
Extended Temp. Range
Average Reverse Breakdown IR = 10 mA
ΔVR/ΔT
ΔVR/ΔIR
±30
±20
±20
Voltage Temperature
IR = 1 mA
ppm/°C
Coefficient (Note 6)
IR = 100 μA
±50
±50
±50
ppm/°C (max)
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
0.2
mV
IRMIN ≤ IR ≤ 1 mA
0.9
0.9
0.9
mV (max)
mV (max)
1.2
1.2
1.2
2.0
mV
1 mA ≤ IR ≤ 15 mA
7.0
7.0
7.0
mV (max)
mV (max)
10.0
10.0
10.0
ZR
eN
Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.5
93
Ω
Wideband Noise
IR = 100 μA
μVrms
10 Hz ≤ f ≤ 10 kHz
Reverse Breakdown Voltage t = 1000 hrs
ΔVR
Long Term Stability
T = 25°C ±0.1°C
120
ppm
mV
IR = 100 μA
VHYST
Thermal Hysteresis
(Note 8)
ΔT = −40°C to 125°C
1.148
7
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LM4050-5.0
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.
LM4050AI LM4050BI LM4050CI
M3
M3
M3
Typical LM4050AE LM4050BE LM4050CE
Units
(Limit)
Symbol
Parameter
Conditions
(Note 4)
M3
M3
M3
Limits
(Note 5)
Limits
(Note 5)
Limits
(Note 5)
VR
Reverse Breakdown Voltage
5.000
V
IR = 100 μA
Reverse Breakdown Voltage
Tolerance (Note 6)
±5.0
±10
±25
mV (max)
IR = 100 μA
Industrial Temp. Range
Extended Temp. Range
±22
±30
±27
±35
±42
±50
mV (max)
mV (max)
IRMIN
Minimum Operating Current
56
μA
74
80
90
74
80
90
74
80
90
μA (max)
μA (max)
μA (max)
ppm/°C
ppm/°C
Industrial Temp. Range
Extended Temp. Range
Average Reverse Breakdown IR = 10 mA
±30
±20
±20
ΔVR/ΔT
ΔVR/ΔIR
Voltage Temperature
IR = 1 mA
Coefficient (Note 6)
IR = 100 μA
±50
±50
±50
ppm/°C
(max)
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
0.2
mV
IRMIN ≤ IR ≤ 1 mA
1.0
1.0
1.0
mV (max)
mV (max)
mV
1.4
1.4
1.4
2.0
1 mA ≤ IR ≤ 15 mA
8.0
8.0
8.0
mV (max)
mV (max)
12.0
12.0
12.0
ZR
eN
Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.5
93
Ω
Ω (max)
μVrms
Wideband Noise
IR = 100 μA
10 Hz ≤ f ≤ 10 kHz
Reverse Breakdown Voltage t = 1000 hrs
ΔVR
Long Term Stability
T = 25°C ±0.1°C
120
1.4
ppm
mV
IR = 100 μA
VHYST
Thermal Hysteresis
(Note 8)
ΔT = −40°C to 125°C
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8
LM4050-8.2
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% and ±0.2% and 0.5% respectively.
LM4050AI LM4050BI LM4050CI
M3
M3
M3
Typical LM4050AE LM4050BE LM4050CE
Units
(Limit)
Symbol
Parameter
Conditions
(Note 4)
M3
M3
M3
Limits
(Note 5)
Limits
(Note 5)
Limits
(Note 5)
VR
Reverse Breakdown Voltage
8.192
V
IR = 150 μA
Reverse Breakdown Voltage
Tolerance (Note 6)
±8.2
±16
±41
mV (max)
IR = 150 μA
Industrial Temp. Range
Extended Temp. Range
±35
±49
±43
±57
±68
±82
mV (max)
mV (max)
IRMIN
Minimum Operating Current
74
μA
91
95
91
95
91
95
μA (max)
μA (max)
μA (max)
ppm/°C
ppm/°C
Industrial Temp. Range
Extended Temp. Range
100
100
100
Average Reverse Breakdown IR = 10 mA
±40
±20
±20
ΔVR/ΔT
ΔVR/ΔIR
Voltage Temperature
IR = 1 mA
Coefficient (Note 6)
IR = 150 μA
±50
±50
±50
ppm/°C
(max)
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
0.6
mV
IRMIN ≤ IR ≤ 1 mA
1.3
1.3
1.3
mV (max)
mV (max)
mV
2.5
2.5
2.5
7.0
1 mA ≤ IR ≤ 15 mA
10.0
10.0
10.0
mV (max)
mV (max)
18.0
18.0
18.0
ZR
eN
Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.6
Ω
Wideband Noise
IR = 150 μA
150
μVrms
10 Hz ≤ f ≤ 10 kHz
Reverse Breakdown Voltage t = 1000 hrs
ΔVR
Long Term Stability
T = 25°C ±0.1°C
120
2.3
ppm
mV
IR = 150 μA
VHYST
Thermal Hysteresis
(Note 8)
ΔT = −40°C to 125°C
9
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LM4050-10.0
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% and ±0.2% and 0.5% respectively.
Typical
(Note 4)
LM4050AI LM4050BI LM4050CI
M3 M3 M3
LM4050AE LM4050BE LM4050CE
Units
(Limit)
Symbol
Parameter
Conditions
M3
M3
M3
Limits
(Note 5)
Limits
(Note 5)
Limits
(Note 5)
VR
Reverse Breakdown Voltage
10.00
80
V
IR = 150 μA
Reverse Breakdown Voltage
Tolerance (Note 6)
±10
±20
±50
mV (max)
IR = 150 μA
Industrial Temp. Range
Extended Temp. Range
±43
±60
±53
±70
±83
mV (max)
mV (max)
±100
IRMIN
Minimum Operating Current
μA
100
103
110
100
103
110
100
103
110
μA (max)
μA (max)
μA (max)
ppm/°C
ppm/°C
Industrial Temp. Range
Extended Temp. Range
Average Reverse Breakdown IR = 10 mA
±40
±20
±20
ΔVR/ΔT
ΔVR/ΔIR
Voltage Temperature
IR = 1 mA
Coefficient (Note 6)
IR = 150 μA
±50
±50
±50
ppm/°C
(max)
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
0.8
mV
IRMIN ≤ IR ≤ 1 mA
1.5
1.5
1.5
mV (max)
mV (max)
mV
3.5
3.5
3.5
8.0
1 mA ≤ IR ≤ 15 mA
12.0
12.0
12.0
mV (max)
mV (max)
23.0
23.0
23.0
ZR
eN
Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.7
Ω
Wideband Noise
IR = 150 μA
150
μVrms
10 Hz ≤ f ≤ 10 kHz
Reverse Breakdown Voltage t = 1000 hrs
ΔVR
Long Term Stability
T = 25°C ±0.1°C
120
2.8
ppm
mV
IR = 150 μA
VHYST
Thermal Hysteresis
(Note 8)
ΔT = −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: 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 SOT-23 package.
Note 3: 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 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 ±[(ΔVR/ΔT)(maxΔT)(VR)]. Where, ΔVR/ΔT is the VR temperature coefficient, maxΔT 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 maxΔT = 65°C is shown below:
A-grade: ±0.425% = ±0.1% ±50 ppm/°C × 65°C
B-grade: ±0.525% = ±0.2% ±50 ppm/°C × 65°C
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10
C-grade: ±0.825% = ±0.5% ±50 ppm/°C × 65°C
Therefore, as an example, the A-grade LM4050-2.5 has an over-temperature Reverse Breakdown Voltage tolerance of ±2.5V × 0.425% = ±11 mV.
Note 7: 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.
Note 8: Thermal hysteresis is defined as the difference in voltage measured at +25°C after cycling to temperature -40°C and the 25°C measurement after cycling
to temperature +125°C.
Typical Performance Characteristics
Output Impedance vs Frequency
Output Impedance vs Frequency
10104510
10104511
Reverse Characteristics and
Minimum Operating Current
Noise Voltage vs Frequency
10104513
10104512
11
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Thermal Hysteresis
10104529
LM4050-10.0
RS = 30k
Start-Up Characteristics
10104505
LM4050-2.5
RS = 30k
10104509
10104507
LM4050-5.0
RS = 30k
10104508
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12
Functional Block Diagram
10104514
sured at 25°C. Next the device is thermal cycled to tempera-
ture +125°C and again measured at 25°C. The resulting
VOUT delta shift between the 25°C measurements is thermal
hysteresis. Thermal hysteresis is common in precision refer-
ences and is induced by thermal-mechanical package stress.
Changes in environmental storage temperature, operating
temperature and board mounting temperature are all factors
that can contribute to thermal hysteresis.
Applications Information
The LM4050 is a precision micro-power curvature-corrected
bandgap shunt voltage reference. For space critical applica-
tions, the LM4050 is available in the sub-miniature SOT-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. Re-
ducing design effort is the availability of several fixed reverse
breakdown voltages: 2.048V, 2.500V, 4.096V, 5.000V,
8.192V, and 10.000V. The minimum operating current in-
creases from 60 μA for the LM4050-2.0 to 100 μA for the
LM4050-10.0. All versions have a maximum operating current
of 15 mA.
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 (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.
LM4050s in the SOT-23 packages have a parasitic Schottky
diode between pin 2 (−) and pin 3 (Die attach interface con-
tact). Therefore, pin 3 of the SOT-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.
RS is determined by the supply voltage, (VS), the load and
operating current, (IL and IQ), and the LM4050's reverse
breakdown voltage, VR.
The typical thermal hysteresis specification is defined as the
change in +25°C voltage measured after thermal cycling. The
device is thermal cycled to temperature -40°C and then mea-
Typical Applications
10104515
FIGURE 1. Shunt Regulator
13
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10104516
**Ceramic monolithic
*Tantalum
FIGURE 2. LM4050-4.1's Nominal 4.096 breakdown voltage gives ADC12451 1 mV/LSB
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14
10104517
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).
10104518
FIGURE 4. Protecting Op Amp input. The bounding voltage is ±4V with the LM4050-2.5
(LM4050's reverse breakdown voltage + 3 diode VF).
15
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10104519
FIGURE 5. Precision ±4.096V Reference
10104521
10104522
FIGURE 6. Precision 1 μA to 1 mA Current Sources
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16
Physical Dimensions inches (millimeters) unless otherwise noted
Plastic Surface Mount Package (M3)
NS Package Number MF03A
(JEDEC Registration TO-236AB)
17
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Notes
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