LM4051 Precision Micropower Shunt Voltage Reference
February 2000
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鈥檚
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 碌A(chǔ) 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/藲C guaranteed from 鈭?0藲C to 125藲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
鹵
0.1% (A grade) at 25藲C.
Key Specifications (LM4051-1.2)
n
Output voltage tolerance
(A grade, 25藲C)
n
Low output noise
(10 Hz to 10kHz)
n
Wide operating current range
n
Industrial temperature range
(tempco guaranteed from
鈭?0藲C to +125藲C)
n
Low temperature coefficient
鹵
0.1%(max)
20碌V
rms
60碌A(chǔ) to 12mA
鈭?0藲C to +85藲C
50 ppm/藲C (max)
Applications
n
n
n
n
n
n
n
n
n
n
n
Portable, Battery-Powered Equipment
Data Acquisition Systems
Instrumentation
Process Control
Energy Management
Automotive and Industrial
Precision Audio Components
Base Stations
Battery Chargers
Medical Equipment
Communication
Features
n
n
n
n
Small packages: SSOT-23
No output capacitor required
Tolerates capacitive loads
Reverse breakdown voltage options of 1.225V and
adjustable
Connection Diagrams
SSOT-23
DS101222-1
DS101222-40
*This pin must be left floating or connected to pin 2.
Top View
See NS Package Number MF03A
漏 2000 National Semiconductor Corporation
DS101222
www.national.com