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LM385B-1.2 Datasheet Preview

LM385B-1.2 Datasheet

Micropower Voltage References

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LM285-1.2, LM385-1.2, LM385B-1.2
SLVS075J – APRIL 1989 – REVISED JANUARY 2015
LMx85-1.2, LM385B-1.2 Micropower Voltage References
1 Features
1 Operating Current Range
– LM285-1.2: 10 μA to 20 mA
– LM385-1.2: 15 μA to 20 mA
– LM385B-1.2: 15 μA to 20 mA
• 1% and 2% Initial Voltage Tolerance
• Reference Impedance
– LM385-1.2: 1 Ω MAX at 25°C
– All devices: 1.5 Ω MAX over Full
Temperature Range
• Very Low Power Consumption
• Interchangeable with Industry Standard
LM285-1.2 and LM385-1.2
2 Applications
• Portable Meter References
• Portable Test Instruments
• Battery-Operated Systems
• Current-Loop Instrumentation
• Panel Meters
3 Description
These micropower, two-terminal, band-gap voltage
references operate over a 10-μA to 20-mA current
range and feature exceptionally low dynamic
impedance and good temperature stability. On-chip
trimming provides tight voltage tolerance. The band-
gap reference for these devices has low noise and
long-term stability.
The design makes these devices exceptionally
tolerant of capacitive loading and, thus, easier to use
in most reference applications. The wide dynamic
operating temperature range accommodates varying
current supplies, with excellent regulation.
The extremely low power drain of this series makes
them useful for micropower circuitry. These voltage
references can be used to make portable meters,
regulators, or general-purpose analog circuitry, with
battery life approaching shelf life. The wide operating
current range allows them to replace older references
with tighter-tolerance parts.
Device Information(1)
PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
SOIC (8)
4.90 mm × 3.91 mm
LMx85-1.2
SOP (8)
TSSOP (8)
6.20 mm × 5.30 mm
3.00 mm × 4.40 mm
TO-226 (3)
4.30 mm × 4.30 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




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LM385B-1.2 Datasheet Preview

LM385B-1.2 Datasheet

Micropower Voltage References

No Preview Available !

LM285-1.2, LM385-1.2, LM385B-1.2
SLVS075J – APRIL 1989 – REVISED JANUARY 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Schematic............................................. 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics........................................... 5
7.6 Typical Characteristics .............................................. 5
8 Detailed Description .............................................. 7
8.1 Overview ................................................................... 7
8.2 Functional Block Diagram ......................................... 7
8.3 Feature Description................................................... 7
8.4 Device Functional Modes.......................................... 7
9 Application and Implementation .......................... 8
9.1 Application Information.............................................. 8
9.2 Typical Application ................................................... 8
9.3 System Examples ................................................... 10
10 Power Supply Recommendations ..................... 11
11 Layout................................................................... 11
11.1 Layout Guidelines ................................................. 11
11.2 Layout Example .................................................... 11
12 Device and Documentation Support ................. 12
12.1 Related Links ........................................................ 12
12.2 Trademarks ........................................................... 12
12.3 Electrostatic Discharge Caution ............................ 12
12.4 Glossary ................................................................ 12
13 Mechanical, Packaging, and Orderable
Information ........................................................... 12
5 Revision History
Changes from Revision I (December 2005) to Revision J
Page
• Added Applications, Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table,
Typical Characteristics, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section. ................................................................................................. 1
• Deleted Ordering Information table. ....................................................................................................................................... 1
2 Submit Documentation Feedback
Copyright © 1989–2015, Texas Instruments Incorporated
Product Folder Links: LM285-1.2 LM385-1.2 LM385B-1.2


Part Number LM385B-1.2
Description Micropower Voltage References
Maker etcTI
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