TI1 LM4050BIM3-10 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
www.ti.com
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)
www.ti.com
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
www.ti.com
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
www.ti.com
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
www.ti.com
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
www.ti.com
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
www.ti.com
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
www.ti.com
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
www.ti.com
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
www.ti.com
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
www.ti.com
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
www.ti.com
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
www.ti.com
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
www.ti.com
LM4050/LM4050Q
10104519
FIGURE 5. Precision ±4.096V Reference
10104521
10104522
FIGURE 6. Precision 1 μA to 1 mA Current Sources
www.ti.com
16
LM4050/LM4050Q
Physical Dimensions inches (millimeters) unless otherwise noted
Plastic Surface Mount Package (M3)
NS Package Number MF03A
(JEDEC Registration TO-236AB)
17
www.ti.com
LM4050/LM4050Q Precision Micropower Shunt Voltage Reference
Notes
TI/NATIONAL INTERIM IMPORTANT NOTICE
Texas Instruments has purchased National Semiconductor. As of Monday, September 26th, and until further notice, products sold or
advertised under the National Semiconductor name or logo, and information, support and interactions concerning such products, remain
subject to the preexisting National Semiconductor standard terms and conditions of sale, terms of use of website, and Notices (and/or
terms previously agreed in writing with National Semiconductor, where applicable) and are not subject to any differing terms and notices
applicable to other TI components, sales or websites. To the extent information on official TI and National websites and business social
networking media, etc., pertains to both TI and National-branded products, both companies' instructions, warnings and limitations in the
above-referenced terms of use apply.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Applications
Audio
www.ti.com/audio
Communications and Telecom
www.ti.com/communications
Amplifiers
amplifier.ti.com
Computers and Peripherals
www.ti.com/computers
Data Converters
dataconverter.ti.com
Consumer Electronics
www.ti.com/consumer-apps
DLP® Products
www.dlp.com
Energy and Lighting
www.ti.com/energy
DSP
dsp.ti.com
Industrial
www.ti.com/industrial
Clocks and Timers
www.ti.com/clocks
Medical
www.ti.com/medical
Interface
interface.ti.com
Security
www.ti.com/security
Logic
logic.ti.com
Space, Avionics and Defense
www.ti.com/space-avionicsdefense
Power Mgmt
power.ti.com
Transportation and Automotive
www.ti.com/automotive
Microcontrollers
microcontroller.ti.com Video and Imaging
www.ti.com/video
RFID
www.ti-rfid.com
www.ti.com/wireless-apps
RF/IF and ZigBee® Solutions www.ti.com/lprf
Wireless
TI E2E Community Home Page e2e.ti.com
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright© 2011 Texas Instruments Incorporated
www.ti.com
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not
responsible or liable for any such statements.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Applications
Audio
www.ti.com/audio
Communications and Telecom www.ti.com/communications
Amplifiers
amplifier.ti.com
Computers and Peripherals
www.ti.com/computers
Data Converters
dataconverter.ti.com
Consumer Electronics
www.ti.com/consumer-apps
DLP® Products
www.dlp.com
Energy and Lighting
www.ti.com/energy
DSP
dsp.ti.com
Industrial
www.ti.com/industrial
Clocks and Timers
www.ti.com/clocks
Medical
www.ti.com/medical
Interface
interface.ti.com
Security
www.ti.com/security
Logic
logic.ti.com
Space, Avionics and Defense
www.ti.com/space-avionics-defense
Power Mgmt
power.ti.com
Transportation and Automotive www.ti.com/automotive
Microcontrollers
microcontroller.ti.com
Video and Imaging
RFID
www.ti-rfid.com
OMAP Mobile Processors
www.ti.com/omap
Wireless Connectivity
www.ti.com/wirelessconnectivity
TI E2E Community Home Page
www.ti.com/video
e2e.ti.com
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2011, Texas Instruments Incorporated
Similar pages