lm4128amfx-1.8 National Semiconductor Corporation, lm4128amfx-1.8 Datasheet

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lm4128amfx-1.8

Manufacturer Part Number
lm4128amfx-1.8
Description
Sot-23 Precision Micropower Series Voltage Reference
Manufacturer
National Semiconductor Corporation
Datasheet
© 2007 National Semiconductor Corporation
LM4128
SOT-23 Precision Micropower Series Voltage Reference
General Description
Ideal for space critical applications, the LM4128 precision
voltage reference is available in the SOT-23 surface-mount
package. The LM4128’s advanced design eliminates the
need for an external stabilizing capacitor while ensuring sta-
bility with capacitive loads up to 10 µF, thus making the
LM4128 easy to use.
Series references provide lower power consumption than
shunt references, since they do not have to idle the maximum
possible load current under no load conditions. This advan-
tage, the low quiescent current (60 µA), and the low dropout
voltage (400 mV) make the LM4128 ideal for battery-powered
solutions.
The LM4128 is available in four grades (A, B, C, and D) for
greater flexibility. The best grade devices (A) have an initial
accuracy of 0.1% with guaranteed temperature coefficient of
75 ppm/°C or less, while the lowest grade parts (D) have an
initial accuracy of 1.0% and a tempco of 100 ppm/°C.
Typical Application Circuit
*Note: The capacitor C
IN
is required and the capacitor C
202110
OUT
is optional.
Features
Applications
Output voltage initial accuracy 0.1%
Low temperature coefficient 75 ppm/°C
Low Supply Current, 60 µA
Enable pin allowing a 3 µA shutdown mode
Up to 20 mA output current
Voltage options 1.8V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V
Custom voltage options available (1.8V to 4.096V)
V
Stable with low ESR ceramic capacitors
SOT23-5 Package
−40°C to 125°C junction temperature range
Instrumentation & Process Control
Test Equipment
Data Acquisition Systems
Base Stations
Servo Systems
Portable, Battery Powered Equipment
Automotive & Industrial
Precision Regulators
Battery Chargers
Communications
Medical Equipment
IN
range of V
REF
+ 400 mV to 5.5V @10 mA
20211001
November 2006
www.national.com

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lm4128amfx-1.8 Summary of contents

Page 1

... Typical Application Circuit *Note: The capacitor C is required and the capacitor C IN © 2007 National Semiconductor Corporation Features ■ Output voltage initial accuracy 0.1% ■ Low temperature coefficient 75 ppm/°C ■ ...

Page 2

... LM4128CMF-2.0 LM4128CMF-2.5 LM4128CMF-3.0 LM4128CMF-3.3 LM4128CMF-4.1 LM4128DMF-1.8 LM4128DMF-2.0 LM4128DMF-2.5 LM4128DMF-3.0 LM4128DMF-3.3 LM4128DMF-4.1 Name N/C GND EN VIN VREF 2 Part Marking Tape and Reel LM4128AMFX-1.8 R5AA LM4128AMFX-2.0 R5BA LM4128AMFX-2.5 R5CA LM4128AMFX-3.0 R5DA LM4128AMFX-3.3 R5EA LM4128AMFX-4.1 R5FA LM4128BMFX-1.8 R5AB LM4128BMFX-2.0 R5BB LM4128BMFX-2.5 R5CB LM4128BMFX-3.0 R5DB LM4128BMFX-3.3 R5EB LM4128BMFX-4 ...

Page 3

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Maximum Voltage on any input Output short circuit duration Power Dissipation (T = 25°C) A (Note 2) Storage Temperature ...

Page 4

Electrical Characteristics LM4128-2 only, and limits in boldface type apply over the junction temperature (T Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm ...

Page 5

Electrical Characteristics LM4128-2.5 (V only, and limits in boldface type apply over the junction temperature (T Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm 25°C, ...

Page 6

Electrical Characteristics LM4128-3.0 (V only, and limits in boldface type apply over the junction temperature (T Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm 25°C, ...

Page 7

Electrical Characteristics LM4128-3.3 (V only, and limits in boldface type apply over the junction temperature (T Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm 25°C, ...

Page 8

Electrical Characteristics LM4128-4 only, and limits in boldface type apply over the junction temperature (T Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm ...

Page 9

Output Voltage vs Temperature 20211054 Line Regulation 20211056 Output Voltage Noise Spectrum 20211057 Load Regulation 0 Noise Power Supply Rejection Ratio vs Frequency 9 20211055 20211021 20211058 www.national.com ...

Page 10

Dropout vs Load to 0.5% Accuracy Supply Current vs Input Voltage Ground Current vs Load Current www.national.com Typical Long Term Stability 20211008 Shutdown I 20211053 Line Transient Response 20211018 10 20211030 vs Input Voltage Q 20211010 ...

Page 11

Load Transient Response 10mA LOAD 20211050 Start-Up Response 20211083 Short-Circuit Protection and Recovery 11 20211082 www.national.com ...

Page 12

Application Information THEORY OF OPERATION The foundation of any voltage reference is the band-gap cir- cuit. While the reference in the LM4128 is developed from the gate-source voltage of transistors in the IC, principles of the band-gap circuit are easily ...

Page 13

T = Temperature drift Nominal preset output voltage REF V = Minimum output voltage over operating REF_MIN temperature range V = Maximum output voltage over operating REF_MAX temperature range ΔT = Operating temperature range. The LM4128 features ...

Page 14

Typical Application Circuits FIGURE 3. Voltage Reference with Complimentary Output FIGURE 4. Precision Voltage Reference with Force and Sense Output www.national.com FIGURE 5. Programmable Current Source 14 20211026 20211027 20211028 ...

Page 15

Physical Dimensions inches (millimeters) unless otherwise noted SOT23-5 Package NS Package Number MF05A 15 www.national.com ...

Page 16

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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