LM4051CIM3-1.2 NSC [National Semiconductor], LM4051CIM3-1.2 Datasheet

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LM4051CIM3-1.2

Manufacturer Part Number
LM4051CIM3-1.2
Description
Precision Micropower Shunt Voltage Reference
Manufacturer
NSC [National Semiconductor]
Datasheet

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© 2000 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) SSOT-23 surface-mount package. The LM4051’s
advanced design eliminates the need for an external stabiliz-
ing 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: SSOT-23
n No output capacitor required
n Tolerates capacitive loads
n Reverse breakdown voltage options of 1.225V and
Connection Diagrams
*This pin must be left floating or connected to pin 2.
adjustable
±
0.1% (A grade) at 25˚C.
DS101222-1
DS101222
See NS Package Number MF03A
Top View
SSOT-23
Key Specifications (LM4051-1.2)
n Output voltage tolerance
n Low output noise
n Wide operating current range
n Industrial temperature range
n Low temperature coefficient
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
−40˚C to +125˚C)
(A grade, 25˚C)
(10 Hz to 10kHz)
(tempco guaranteed from
DS101222-40
50 ppm/˚C (max)
−40˚C to +85˚C
February 2000
60µA to 12mA
www.national.com
±
0.1%(max)
20µV
rms

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LM4051CIM3-1.2 Summary of contents

Page 1

LM4051 Precision Micropower Shunt Voltage Reference General Description Ideal for space critical applications, the LM4051 precision voltage reference is available in the sub-miniature ( 1.3 mm) SSOT-23 surface-mount package. The LM4051’s advanced design eliminates the need for an ...

Page 2

... Voltage or Reference Voltage Tolerance ± ± ± 0.1 0.2 0.5% www.national.com LM4051 Supplied as LM4051 Supplied as 1000 Units, Tape and 3000 Units, Tape and Reel Reel LM4051AIM3-1.2 LM4051AIM3X-1.2 LM4051AIM3-ADJ LM4051AIM3X-ADJ LM4051BIM3-1.2 LM4051BIM3X-1.2 LM4051BIM3-ADJ LM4051BIM3X-ADJ LM4051CIM3-1.2 LM4051CIM3X-1.2 LM4051CIM3-ADJ LM4051CIM3X-ADJ 2 Part Marking RIA RHA RIB RHB RIC RHC ...

Page 3

... mA 120 Hz 0.5 = 100 µ kHz ± 0.1˚C 120 = 100 µ −40˚C to 125˚C 0.36 3 (Notes min −40˚C 60 µ µ LM4051BIM3 LM4051CIM3 (Limits) Limts (Note 5) (Note 5) ± ± ± 1.2 2.4 6 ± ± ± 5.2 6.4 10 ± ...

Page 4

... T = −40˚C to +125˚ mA 0.3 OUT REF = 10V 2 OUT = 100 µ OUT REF f 10 kHz 120 = 100 µA ± 0.1˚ −40˚C to +125˚C 0.3 4 LM4051BIM3 LM4051CIM3 (Note 5) (Note 5) ± ± ± 1.2 2.4 6 ± ± ± 5.2 6.4 10 1.1 1.1 1.1 1.5 1.5 1.5 6 ...

Page 5

Electrical Characteristics (continued) 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 ...

Page 6

Typical Performance Characteristics Noise Voltage Start-Up Characteristics Reference Voltage vs Output Voltage and Temperature www.national.com (Continued) Reverse Characteristics and Minimum Operating Current DS101222-5 DS101222-7 Reference Voltage vs Temperature and Output Voltage DS101222-11 6 DS101222-9 DS101222-8 DS101222-10 ...

Page 7

Typical Performance Characteristics Feedback Current vs Output Voltage and Temperature Output Impedance vs Frequency Reverse Characteristics (Continued) Output Saturation (SOT-23 Only) DS101222-12 Output Impedance vs Frequency DS101222-13 DS101222-15 7 DS101222-33 DS101222-14 DS101222-16 www.national.com ...

Page 8

Typical Performance Characteristics Large Signal Response Thermal Hysteresis Functional Block Diagram *LM4051-ADJ only **LM4051-1.2 only www.national.com (Continued) DS101222-17 DS101222-50 8 DS101222-18 DS101222-21 ...

Page 9

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 SSOT-23 surface-mount package. The LM4051 has been designed for stable operation without the need of ...

Page 10

Typical Applications (Continued) FIGURE 3. Bounded amplifier reduces saturation-induced delays and can prevent succeeding stage damage. Nominal clamping voltage is DS101222-20 FIGURE 4. Voltage Level Detector www.national.com DS101222-24 ± V (LM4051’s reverse breakdown voltage) +2 diode V O FIGURE 5. ...

Page 11

Typical Applications (Continued) DS101222-25 FIGURE 6. Fast Positive Clamp 2. FIGURE 7. Bidirectional Clamp DS101222-26 ± 2.4V FIGURE 10. Simple Floating Current Detector 11 DS101222-35 FIGURE 8. Bidirectional Adjustable ± ± Clamp 18V to 2.4V DS101222-36 FIGURE ...

Page 12

Typical Applications (Continued) Note 11: *D1 can be any LED 1. mA. D1 may act as an indicator. D1 will www.national.com DS101222-38 FIGURE 11. Current Source FIGURE ...

Page 13

Typical Applications (Continued) FIGURE 13. Precision 1 µ Current Sources DS101222-28 DS101222-29 13 www.national.com ...

Page 14

Physical Dimensions LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. ...

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