TI1 LM4050QCIM3-2.0 Lm4050/lm4050q precision micropower shunt voltage reference Datasheet

LM4050
LM4050/LM4050Q Precision Micropower Shunt Voltage Reference
Literature Number: SNOS455D
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 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:
2.048V, 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.
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 are available in
both an industrial temperature range (−40°C and +85°C) and
an extended temperature range (−40°C and +125°C).
■ Output voltage tolerance
Features
■
■
■
■
Small packages: SOT-23
No output capacitor required
Tolerates capacitive loads
Fixed reverse breakdown voltages of 2.048V, 2.500V,
4.096V, 5.000V, 8.192V, and 10.000V
(A grade, 25°C)
±0.1% (max)
■ Low output noise
(10 Hz to 10 kHz)
■
■
■
■
■
Wide operating current range
41 μVrms(typ)
60 μA to 15 mA
Industrial temperature range
−40°C to +85°C
Extended temperature range
−40°C to +125°C
Low temperature coefficient
50 ppm/°C (max)
LM4050QA/QB/QC are AECQ100 Grade 1 qualified and are
manufactured on an automotive
grade flow
Applications
■
■
■
■
■
■
■
■
Portable, Battery-Powered Equipment
Data Acquisition Systems
Instrumentation
Process Control
Energy Management
Product Testing
Automotive
Precision Audio Components
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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LM4050/LM4050Q Precision Micropower Shunt Voltage Reference
November 10, 2011
LM4050/LM4050Q
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
±0.1%, 50 ppm/°C max (A grade)
±0.2%, 50 ppm/°C max (B grade)
±0.5%, 50 ppm/°C max (C grade)
LM4050AIM3-2.0
LM4050AIM3X-2.0
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
LM4050BIM3-2.0
LM4050BIM3X-2.0
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
LM4050CIM3-2.0
LM4050CIM3X-2.0
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 LM4050 Supplied as 1000 Units, Tape LM4050 Supplied as 3000 Units, Tape
Breakdown
and Reel
and Reel
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)
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LM4050AEM3-2.0
LM4050AEM3X-2.0
LM4050AEM3-2.5
LM4050AEM3X-2.5
LM4050AEM3-4.1
LM4050AEM3X-4.1
LM4050AEM3-5.0
LM4050AEM3X-5.0
LM4050AEM3-8.2
LM4050AEM3X-8.2
LM4050AEM3-10
LM4050AEM3X-10
LM4050BEM3-2.0
LM4050BEM3X-2.0
LM4050BEM3-2.5
LM4050BEM3X-2.5
LM4050BEM3-4.1
LM4050BEM3X-4.1
LM4050BEM3-5.0
LM4050BEM3X-5.0
LM4050BEM3-8.2
LM4050BEM3X-8.2
LM4050BEM3-10
LM4050BEM3X-10
LM4050CEM3-2.0
LM4050CEM3X-2.0
LM4050CEM3-2.5
LM4050CEM3X-2.5
LM4050CEM3-4.1
LM4050CEM3X-4.1
LM4050CEM3-5.0
LM4050CEM3X-5.0
LM4050CEM3-8.2
LM4050CEM3X-8.2
LM4050CEM3-10
LM4050CEM3X-10
2
Reverse Breakdown
Voltage Tolerance at 25°C and Average Reverse
Breakdown
Voltage Temperature Coefficient
±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)
LM4050Q Supplied as 1000 Units,
Tape and Reel
LM4050Q Supplied as 3000 Units,
Tape and Reel
LM4050QAIM3-2.0
LM4050QAIM3X2.0
LM4050QAIM3-2.5
LM4050QAIM3X2.5
LM4050QAIM3-4.1
LM4050QAIM3X4.1
LM4050QAIM3-5.0
LM4050QAIM3X5.0
LM4050QAIM3-8.2
LM4050QAIM3X8.2
LM4050QAIM3-10
LM4050QAIM3X10
LM4050QBIM3-2.0
LM4050QBIM3X2.0
LM4050QBIM3-2.5
LM4050QBIM3X2.5
LM4050QBIM3-4.1
LM4050QBIM3X4.1
LM4050QBIM3-5.0
LM4050QBIM3X5.0
LM4050QBIM3-8.2
LM4050QBIM3X8.2
LM4050QBIM3-10
LM4050QBIM3X10
LM4050QCIM3-2.0
LM4050QCIM3X2.0
LM4050QCIM3-2.5
LM4050QCIM3X2.5
LM4050QCIM3-4.1
LM4050QCIM3X4.1
LM4050QCIM3-5.0
LM4050QCIM3X5.0
LM4050QCIM3-8.2
LM4050QCIM3X8.2
LM4050QCIM3-10
LM4050QCIM3X10
Extended Temperature Range (−40°C to +125°C)
Reverse Breakdown
Voltage Tolerance at 25°C and Average Reverse
Breakdown
Voltage Temperature Coefficient
±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)
LM4050Q Supplied as 1000 Units,
Tape and Reel
LM4050Q Supplied as 3000 Units,
Tape and Reel
LM4050QAEM3-2.0
LM4050QAEM3X2.0
LM4050QAEM3-2.5
LM4050QAEM3X2.5
LM4050QAEM3-4.1
LM4050QAEM3X4.1
LM4050QAEM3-5.0
LM4050QAEM3X5.0
LM4050QAEM3-8.2
LM4050QAEM3X8.2
LM4050QAEM3-10
LM4050QAEM3X10
LM4050QBEM3-2.0
LM4050QBEM3X2.0
LM4050QBEM3-2.5
LM4050QBEM3X2.5
LM4050QBEM3-4.1
LM4050QBEM3X4.1
LM4050QBEM3-5.0
LM4050QBEM3X5.0
LM4050QBEM3-8.2
LM4050QBEM3X8.2
LM4050QBEM3-10
LM4050QBEM3X10
LM4050QCEM3-2.0
LM4050QCEM3X2.0
LM4050QCEM3-2.5
LM4050QCEM3X2.5
LM4050QCEM3-4.1
LM4050QCEM3X4.1
LM4050QCEM3-5.0
LM4050QCEM3X5.0
LM4050QCEM3-8.2
LM4050QCEM3X8.2
LM4050QCEM3-10
LM4050QCEM3X10
3
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LM4050/LM4050Q
Industrial Temperature Range (−40°C to +85°C)
LM4050/LM4050Q
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
First Field:
R = Reference
Second Field:
N = 2.048V Voltage Option
C = 2.500V Voltage Option
D = 4.096V Voltage Option
RCB
RDB
REB
RFB
E = 5.000V Voltage Option
RGB
RNB
RCC
RDC
REC
RFC
RGC
RNC
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Field Definition
RCA
RDA
REA
RFA
RGA
RNA
F = 8.192V Voltage Option
G = 10.000V Voltage Option
Third Field:
A–C = Initial Reverse Breakdown Voltage or Reference Voltage Tolerance
A = ±0.1%, B = ±0.2%, C = +0.5%,
4
If Military/Aerospace specified devices are required,
please contact the Texas Instruments Sales Office/
Distributors for availability and specifications.
Reverse Current
Forward Current
Power Dissipation (TA = 25°C) (Note 2)
M3 Package
Storage Temperature
Lead Temperature
M3 Package
Vapor phase (60 seconds)
Infrared (15 seconds)
ESD Susceptibility
Human Body Model (Note 3)
Operating Ratings
20 mA
10 mA
Industrial Temperature
Range
Extended temperature
Range
Reverse Current
LM4050-2.0,
280 mW
−65°C to +150°C
+215°C
+220°C
2 kV
(Note 2)
(Tmin ≤ TA ≤ Tmax)
Temperature Range
−40°C ≤ TA ≤ +85°C
−40°C ≤ TA ≤ +125°C
60 μA to 15 mA
LM4050-2.5
60 μA to 15 mA
LM4050-4.1
68 μA to 15 mA
LM4050-5.0
74 μA to 15 mA
LM4050-8.2
91 μA to 15 mA
LM4050-10.0
100 μA to 15 mA
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.
Symbol
VR
Parameter
Reverse Breakdown
Voltage
Conditions
IR = 100 μA
Typical
(Note 4)
2.048
Reverse Breakdown
IR = 100 μA
Voltage Tolerance (Note 6) Industrial Temp. Range
Extended Temp.
Range
IRMIN
ΔVR/ΔT
ΔVR/ΔIR
LM4050CIM
LM4050AIM3 LM4050BIM3
3
LM4050AEM LM4050BEM
LM4050CEM
3
3
3
Limits
Limits
Limits
(Note 5)
(Note 5)
(Note 5)
Minimum Operating Current
Units
(Limit)
V
±2.048
±4.096
±10.24
mV (max)
±9.0112
±11.4688
±14.7456
mV (max)
±12.288
±14.7456
±17.2032
60
60
60
μA (max)
65
65
65
μA (max)
mV (max)
μA
41
Average Reverse
Breakdown Voltage
Temperature Coefficient
(Note 6)
IR = 10 mA
±20
ppm/°C
IR = 1 mA
±15
ppm/°C
IR = 100 μA
±15
Reverse Breakdown
Voltage Change with
Operating Current Change
(Note 7)
IRMIN ≤ IR ≤ 1 mA
0.3
1 mA ≤ IR ≤ 15 mA
±50
±50
±50
ppm/°C (max)
mV
0.8
0.8
0.8
mV (max)
1.2
1.2
1.2
mV (max)
2.3
mV
6.0
8.0
6.0
8.0
6.0
8.0
mV (max)
mV (max)
ZR
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.3
Ω
eN
Wideband Noise
IR = 100 μA
34
μVrms
10 Hz ≤ f ≤ 10 kHz
5
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LM4050/LM4050Q
Machine Model (Note 3)
200V
See AN-450 “Surface Mounting Methods and Their Effect on
Product Reliability” for other methods of soldering surface
mount devices.
Absolute Maximum Ratings (Note 1)
LM4050/LM4050Q
Symbol
ΔVR
VHYST
Parameter
Conditions
Typical
(Note 4)
Reverse Breakdown
t = 1000 hrs
Voltage Long Term Stability T = 25°C ±0.1°C
IR = 100 μA
Thermal Hysteresis
(Note 8)
LM4050CIM
LM4050AIM3 LM4050BIM3
3
LM4050AEM LM4050BEM
LM4050CEM
3
3
3
Limits
Limits
Limits
(Note 5)
(Note 5)
(Note 5)
120
ΔT = −40°C to 125°C
Units
(Limit)
ppm
0.7
mV
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
IRMIN
ΔVR/ΔT
ΔVR/ΔIR
Parameter
Typical
(Note 4)
Conditions
LM4050AI LM4050BI LM4050CI
M3
M3
M3
LM4050AE LM4050BE LM4050CE
M3
M3
M3
Limits
Limits
Limits
(Note 5)
(Note 5)
(Note 5)
Units
(Limit)
Reverse Breakdown Voltage
IR = 100 μA
Reverse Breakdown Voltage
Tolerance (Note 6)
IR = 100 μA
±2.5
±5.0
±13
mV (max)
Industrial Temp. Range
Extended Temp. Range
±11
±15
±14
±18
±21
±25
mV (max)
mV (max)
60
60
60
μA (max)
65
65
65
μA (max)
2.500
Minimum Operating Current
μA
41
Average Reverse Breakdown IR = 10 mA
Voltage Temperature
IR = 1 mA
Coefficient (Note 6)
IR = 100 μA
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
V
±20
ppm/°C
±15
ppm/°C
±15
IRMIN ≤ IR ≤ 1 mA
±50
±50
±50
ppm/°C (max)
0.8
1.2
0.8
1.2
0.8
1.2
mV (max)
mV (max)
6.0
8.0
6.0
8.0
6.0
8.0
mV (max)
mV (max)
0.3
1 mA ≤ IR ≤ 15 mA
mV
2.3
mV
0.3
Ω
41
μVrms
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120
ppm
ΔT = −40°C to 125°C
0.7
ZR
Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
eN
Wideband Noise
ΔVR
Reverse Breakdown Voltage
Long Term Stability
Thermal Hysteresis
(Note 8)
IR = 100 μA
10 Hz ≤ f ≤ 10 kHz
VHYST
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6
mV
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
IRMIN
ΔVR/ΔT
ΔVR/ΔIR
Parameter
Typical
(Note 4)
Conditions
Units
(Limit)
Reverse Breakdown Voltage
IR = 100 μA
Reverse Breakdown Voltage
Tolerance (Note 6)
IR = 100 μA
±4.1
±8.2
±21
mV (max)
Industrial Temp. Range
Extended Temp. Range
±18
±25
±22
±29
±34
±41
mV (max)
mV (max)
68
68
68
μA (max)
Industrial Temp. Range
73
73
73
μA (max)
Extended Temp. Range
78
78
78
μA (max)
4.096
Minimum Operating Current
Average Reverse Breakdown IR = 10 mA
Voltage Temperature
IR = 1 mA
Coefficient (Note 6)
IR = 100 μA
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
V
μA
52
±30
ppm/°C
±20
ppm/°C
±20
IRMIN ≤ IR ≤ 1 mA
±50
±50
±50
0.2
1 mA ≤ IR ≤ 15 mA
ZR
LM4050AI LM4050BI LM4050CI
M3
M3
M3
LM4050AE LM4050BE LM4050CE
M3
M3
M3
Limits
Limits
Limits
(Note 5)
(Note 5)
(Note 5)
mV
0.9
1.2
0.9
1.2
0.9
1.2
mV (max)
mV (max)
7.0
10.0
7.0
10.0
7.0
10.0
mV (max)
mV (max)
2.0
Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
ppm/°C (max)
mV
0.5
Ω
93
μVrms
120
ppm
1.148
mV
IAC = 0.1 IR
eN
Wideband Noise
IR = 100 μA
10 Hz ≤ f ≤ 10 kHz
ΔVR
VHYST
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
Thermal Hysteresis
(Note 8)
ΔT = −40°C to 125°C
7
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LM4050/LM4050Q
LM4050-4.1
Electrical Characteristics
LM4050/LM4050Q
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.
Symbol
VR
IRMIN
Parameter
Typical
(Note 4)
Conditions
LM4050BI
M3
LM4050BE
M3
Limits
(Note 5)
LM4050CI
M3
LM4050CE
M3
Limits
(Note 5)
Units
(Limit)
Reverse Breakdown Voltage
IR = 100 μA
Reverse Breakdown Voltage
Tolerance (Note 6)
IR = 100 μA
±5.0
±10
±25
mV (max)
Industrial Temp. Range
Extended Temp. Range
±22
±30
±27
±35
±42
±50
mV (max)
mV (max)
74
74
74
μA (max)
Industrial Temp. Range
80
80
80
μA (max)
Extended Temp. Range
90
90
90
μA (max)
5.000
Minimum Operating Current
ΔVR/ΔIR Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
±20
IRMIN ≤ IR ≤ 1 mA
Reverse Breakdown Voltage
Long Term Stability
ppm/°C
±50
±50
±50
ppm/°C
(max)
1.0
1.4
1.0
1.4
1.0
1.4
mV (max)
mV (max)
8.0
12.0
8.0
12.0
8.0
12.0
mV (max)
mV (max)
0.2
mV
2.0
0.5
mV
Ω
Ω (max)
IAC = 0.1 IR
ΔVR
ppm/°C
±20
Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
Wideband Noise
μA
±30
1 mA ≤ IR ≤ 15 mA
eN
V
56
ΔVR/ΔT Average Reverse Breakdown IR = 10 mA
Voltage Temperature
IR = 1 mA
Coefficient (Note 6)
IR = 100 μA
ZR
LM4050AI
M3
LM4050AE
M3
Limits
(Note 5)
IR = 100 μA
93
μVrms
120
ppm
10 Hz ≤ f ≤ 10 kHz
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
VHYST
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Thermal Hysteresis
(Note 8)
ΔT = −40°C to 125°C
1.4
8
mV
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.
Symbol
VR
IRMIN
ΔVR/ΔT
ΔVR/ΔIR
Parameter
Typical
(Note 4)
Conditions
Units
(Limit)
Reverse Breakdown Voltage
IR = 150 μA
Reverse Breakdown Voltage
Tolerance (Note 6)
IR = 150 μA
±8.2
±16
±41
mV (max)
Industrial Temp. Range
Extended Temp. Range
±35
±49
±43
±57
±68
±82
mV (max)
mV (max)
91
91
91
μA (max)
Industrial Temp. Range
95
95
95
μA (max)
Extended Temp. Range
100
100
100
μA (max)
8.192
Minimum Operating Current
Average Reverse Breakdown IR = 10 mA
Voltage Temperature
IR = 1 mA
Coefficient (Note 6)
IR = 150 μA
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
V
μA
74
±40
ppm/°C
±20
±20
IRMIN ≤ IR ≤ 1 mA
ppm/°C
±50
±50
±50
ppm/°C
(max)
1.3
2.5
1.3
2.5
1.3
2.5
mV (max)
mV (max)
10.0
18.0
10.0
18.0
10.0
18.0
mV (max)
mV (max)
0.6
1 mA ≤ IR ≤ 15 mA
ZR
LM4050AI LM4050BI LM4050CI
M3
M3
M3
LM4050AE LM4050BE LM4050CE
M3
M3
M3
Limits
Limits
Limits
(Note 5)
(Note 5)
(Note 5)
mV
7.0
Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
mV
0.6
Ω
150
μVrms
120
ppm
IAC = 0.1 IR
eN
Wideband Noise
ΔVR
Reverse Breakdown Voltage
Long Term Stability
IR = 150 μA
10 Hz ≤ f ≤ 10 kHz
t = 1000 hrs
T = 25°C ±0.1°C
IR = 150 μA
VHYST
Thermal Hysteresis
(Note 8)
ΔT = −40°C to 125°C
2.3
9
mV
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LM4050/LM4050Q
LM4050-8.2
Electrical Characteristics
LM4050/LM4050Q
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)
Symbol
VR
IRMIN
Parameter
Conditions
ΔVR/ΔIR
IR = 150 μA
Reverse Breakdown Voltage
Tolerance (Note 6)
IR = 150 μA
±10
±20
±50
mV (max)
Industrial Temp. Range
Extended Temp. Range
±43
±60
±53
±70
±83
±100
mV (max)
mV (max)
100
100
100
μA (max)
Industrial Temp. Range
103
103
103
μA (max)
Extended Temp. Range
110
110
110
μA (max)
10.00
Average Reverse Breakdown IR = 10 mA
Voltage Temperature
IR = 1 mA
Coefficient (Note 6)
IR = 150 μA
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
V
μA
80
±40
ppm/°C
±20
±20
IRMIN ≤ IR ≤ 1 mA
ppm/°C
±50
±50
±50
ppm/°C
(max)
1.5
3.5
1.5
3.5
1.5
3.5
mV (max)
mV (max)
12.0
23.0
12.0
23.0
12.0
23.0
mV (max)
mV (max)
0.8
1 mA ≤ IR ≤ 15 mA
ZR
Units
(Limit)
Reverse Breakdown Voltage
Minimum Operating Current
ΔVR/ΔT
LM4050AI LM4050BI LM4050CI
M3
M3
M3
LM4050AE LM4050BE LM4050CE
M3
M3
M3
Limits
Limits
Limits
(Note 5)
(Note 5)
(Note 5)
mV
8.0
Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
mV
0.7
Ω
150
μVrms
120
ppm
IAC = 0.1 IR
eN
Wideband Noise
ΔVR
Reverse Breakdown Voltage
Long Term Stability
IR = 150 μA
10 Hz ≤ f ≤ 10 kHz
t = 1000 hrs
T = 25°C ±0.1°C
IR = 150 μA
VHYST
Thermal Hysteresis
(Note 8)
ΔT = −40°C to 125°C
2.8
mV
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 ±[(ΔV R/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
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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LM4050/LM4050Q
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.
LM4050/LM4050Q
Thermal Hysteresis
10104529
LM4050-10.0
Start-Up Characteristics
RS = 30k
10104505
LM4050-2.5
RS = 30k
10104509
10104507
LM4050-5.0
RS = 30k
10104508
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12
LM4050/LM4050Q
Functional Block Diagram
10104514
sured at 25°C. Next the device is thermal cycled to temperature +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 references 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.
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.
RS is determined by the supply voltage, (VS), the load and
operating current, (IL and IQ), and the LM4050's reverse
breakdown voltage, VR.
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 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. 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.
LM4050s in the SOT-23 packages have a parasitic Schottky
diode between pin 2 (−) and pin 3 (Die attach interface contact). 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.
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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LM4050/LM4050Q
10104516
**Ceramic monolithic
*Tantalum
FIGURE 2. LM4050-4.1's Nominal 4.096 breakdown voltage gives ADC12451 1 mV/LSB
www.ti.com
14
LM4050/LM4050Q
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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LM4050/LM4050Q
10104519
FIGURE 5. Precision ±4.096V Reference
10104521
10104522
FIGURE 6. Precision 1 μA to 1 mA Current Sources
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16
LM4050/LM4050Q
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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LM4050/LM4050Q Precision Micropower Shunt Voltage Reference
Notes
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