LM4051AIM3-ADJ National Semiconductor, LM4051AIM3-ADJ Datasheet

IC, SM, ADJUSTABLE, VOLT REF, 0.1%

LM4051AIM3-ADJ

Manufacturer Part Number
LM4051AIM3-ADJ
Description
IC, SM, ADJUSTABLE, VOLT REF, 0.1%
Manufacturer
National Semiconductor
Datasheet

Specifications of LM4051AIM3-ADJ

Rohs Compliant
YES

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© 2005 National Semiconductor Corporation
LM4051
Precision Micropower Shunt Voltage Reference
General Description
Ideal for space critical applications, the LM4051 precision
voltage reference is available in the sub-miniature (3 mm x
1.3 mm) SOT-23 surface-mount package. The LM4051’s ad-
vanced design eliminates the need for an external stabilizing
capacitor while ensuring stability with any capacitive load,
thus making the LM4051 easy to use. Further reducing
design effort is the availability of a fixed (1.225V) and adjust-
able reverse breakdown voltage. The minimum operating
current is 60 µA for the LM4051-1.2 and the LM4051-ADJ.
Both versions have a maximum operating current of 12 mA.
The LM4051 comes in three grades (A, B, and C). The best
grade devices (A) have an initial accuracy of 0.1%, while the
B-grade have 0.2% and the C-grade 0.5%, all with a tempco
of 50 ppm/˚C guaranteed from −40˚C to 125˚C.
The LM4051 utilizes fuse and zener-zap trim of reference
voltage during wafer sort to ensure that the prime parts have
an accuracy of better than
Features
n Small packages: SOT-23
n No output capacitor required
n Tolerates capacitive loads
n Reverse breakdown voltage options of 1.225V and
Key Specifications (LM4051-1.2)
Connection Diagrams
SOT-23
*This pin must be left floating or connected to pin 2.
j
adjustable
(A grade, 25˚C)
Output voltage tolerance
±
0.1% (A grade) at 25˚C.
10122201
DS101222
See NS Package Number MF03A
±
0.1%(max)
Top View
Applications
n Portable, Battery-Powered Equipment
n Data Acquisition Systems
n Instrumentation
n Process Control
n Energy Management
n Automotive and Industrial
n Precision Audio Components
n Base Stations
n Battery Chargers
n Medical Equipment
n Communication
j
j
j
j
j
(10 Hz to 10kHz)
Low output noise
Wide operating current range
Industrial temperature range
Extended temperature range
Low temperature coefficient
10122240
50 ppm/˚C (max)
−40˚C to +125˚C
−40˚C to +85˚C
60µA to 12mA
www.national.com
March 2005
20µV
rms

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LM4051AIM3-ADJ Summary of contents

Page 1

... Reverse breakdown voltage options of 1.225V and adjustable Key Specifications (LM4051-1.2) j Output voltage tolerance (A grade, 25˚C) Connection Diagrams SOT-23 10122201 *This pin must be left floating or connected to pin 2. © 2005 National Semiconductor Corporation j Low output noise ( 10kHz) j Wide operating current range j Industrial temperature range j Extended temperature range ...

Page 2

... Third Field: A–C = Initial Reverse Breakdown A = www.national.com Industrial Temperature Range (−40˚C to +85˚C) LM4051 Supplied as 1000 Units, Tape and Reel LM4051AIM3-1.2 LM4051AIM3-ADJ LM4051BIM3-1.2 LM4051BIM3-ADJ LM4051CIM3-1.2 LM4051CIM3-ADJ Extended Temperature Range (−40˚C to +125˚C) LM4051 Supplied as 1000 Units, Tape and Reel LM4051AEM3-1 ...

Page 3

... LM4051-ADJ all other limits 25˚C. The grades A, B and C designate initial Re- MIN MAX A J ± ± ± 0.1%, 0.2% and 0.5% respectively. LM4051AIM3 Typical LM4051AEM3 Conditions (Note 4) (Limits) (Note 100 µA 1.225 100 µA R Industrial Temp. Range Extended Temp. Range 39 ± ...

Page 4

... Long Term Stability REF (Note 9) V Thermal Hysteresis HYST (Note 10) www.national.com all other limits T = 25˚C unless otherwise specified (SOT-23, see (Note 7) MIN MAX J = 5V. OUT Typical LM4051AIM3 (Note 4) LM4051AEM3 Conditions (Limits) (Note 100 µ 1.212 R OUT I = 100 µ OUT Industrial Temp. Range Extended Temp ...

Page 5

LM4051-ADJ (Adjustable) Electrical Characteristics 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 ...

Page 6

Typical Performance Characteristics Temperature Drift for Different Average Temperature Coefficient Noise Voltage Start-Up Characteristics www.national.com Output Impedance vs Frequency 10122219 Reverse Characteristics and Minimum Operating Current 10122205 10122207 6 10122204 10122209 10122208 ...

Page 7

Typical Performance Characteristics Reference Voltage vs Output Voltage and Temperature Feedback Current vs Output Voltage and Temperature Output Impedance vs Frequency (Continued) Reference Voltage vs Temperature 10122211 10122212 Output Impedance vs Frequency 10122213 7 and Output Voltage 10122210 Output Saturation ...

Page 8

Typical Performance Characteristics Reverse Characteristics Large Signal Response www.national.com (Continued) 10122215 10122217 Thermal Hysteresis 10122250 8 10122216 10122218 ...

Page 9

Functional Block Diagram *LM4051-ADJ only **LM4051-1.2 only Applications Information The LM4051 is a precision micro-power curvature-corrected bandgap shunt voltage reference. For space critical applica- tions, the LM4051 is available in the sub-miniature SOT-23 surface-mount package. The LM4051 has been designed ...

Page 10

Typical Applications 10122222 FIGURE 1. Shunt Regulator FIGURE 2. Adjustable Shunt Regulator FIGURE 3. Bounded amplifier reduces saturation-induced delays and can prevent succeeding stage damage. Nominal clamping voltage is www.national.com 10122234 ± V (LM4051’s reverse breakdown voltage) +2 diode V ...

Page 11

Typical Applications (Continued) 10122220 FIGURE 4. Voltage Level Detector 10122223 FIGURE 5. Voltage Level Detector 10122225 FIGURE 6. Fast Positive Clamp 2. FIGURE 7. Bidirectional Clamp FIGURE 8. Bidirectional Adjustable ± ± Clamp 18V to 2.4V 11 ...

Page 12

Typical Applications Note 11: *D1 can be any LED 1. mA. D1 may act as an indicator. D1 will www.national.com (Continued) FIGURE 10. Simple Floating Current ...

Page 13

Typical Applications (Continued) FIGURE 12. Precision Floating Current Detector FIGURE 13. Precision 1 µ Current Sources 10122228 13 10122239 10122229 www.national.com ...

Page 14

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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