LM285MX-1.2 National Semiconductor, LM285MX-1.2 Datasheet

IC,VOLT REFERENCE,FIXED,1.2V,BIPOLAR,SOP,8PIN,PLASTIC

LM285MX-1.2

Manufacturer Part Number
LM285MX-1.2
Description
IC,VOLT REFERENCE,FIXED,1.2V,BIPOLAR,SOP,8PIN,PLASTIC
Manufacturer
National Semiconductor
Datasheet

Specifications of LM285MX-1.2

Rohs Compliant
NO
Fixed / Adjust / Prog
Precision
Output Voltage (max)
1.235V
Temperature Coefficient
150ppm/°C
Reference Voltage Accuracy (max)
1
Load Regulation
10mV
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
8
Package Type
SOIC N
Lead Free Status / Rohs Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM285MX-1.2
Manufacturer:
KYE
Quantity:
6 249
Part Number:
LM285MX-1.2
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LM285MX-1.2/NOPB
Manufacturer:
NS
Quantity:
110
© 2008 National Semiconductor Corporation
LM185-1.2/LM285-1.2/LM385-1.2
Micropower Voltage Reference Diode
General Description
The LM185-1.2/LM285-1.2/LM385-1.2 are micropower 2-ter-
minal band-gap voltage regulator diodes. Operating over a
10μA to 20mA current range, they feature exceptionally low
dynamic impedance and good temperature stability. On-chip
trimming is used to provide tight voltage tolerance. Since the
LM185-1.2 band-gap reference uses only transistors and re-
sistors, low noise and good long term stability result.
Careful design of the LM185-1.2 has made the device excep-
tionally tolerant of capacitive loading, making it easy to use in
almost any reference application. The wide dynamic operat-
ing range allows its use with widely varying supplies with
excellent regulation.
The extremely low power drain of the LM185-1.2 makes it
useful for micropower circuitry. This voltage reference can be
used to make portable meters, regulators or general purpose
analog circuitry with battery life approaching shelf life.
Further, the wide operating current allows it to replace older
references with a tighter tolerance part.
Connection Diagrams
LM385BXM-1.2 or LM385BYM-1.2
LM385BXZ-1.2 or LM385BYZ-1.2
LM285BXM-1.2, LM285BYM-1.2
See NS Package Number M08A
See NS Package Number Z03A
LM285BXZ-1.2, LM285BYZ-1.2
Order Number LM285M-1.2,
Order Number LM285Z-1.2,
LM385M-1.2, LM385BM-1.2
LM385Z-1.2, LM385BZ-1.2
Plastic Package (Z)
Bottom View
SO Package
T0-92
551810
551809
5518
* Pin 3 is attached to the Die Attach Pad (DAP) and should be connected to
Pin 2 or left floating.
The LM185-1.2 is rated for operation over a −55°C to 125°C
temperature range while the LM285-1.2 is rated −40°C to 85°
C and the LM385-1.2 0°C to 70°C. The LM185-1.2/LM285-1.2
are available in a hermetic TO-46 package and the
LM285-1.2/LM385-1.2 are also available in a low-cost TO-92
molded package, as well as SO and SOT-23. The LM185-1.2
is also available in a hermetic leadless chip carrier package.
Features
±1% and 2% initial tolerance
Operating current of 10μA to 20mA
1Ω dynamic impedance
Low temperature coefficient
Low voltage reference—1.235V
2.5V device and adjustable device also available
LM185-2.5 series and LM185 series, respectively
Order Number LM185H-1.2, LM185H-1.2/883,
See NS Package Number MF03A
See NS Package Number H02A
LM185BXH-1.2, LM185BYH-1.2
LM285H-1.2 or LM285BXH-1.2
Order Number LM385M3-1.2
Metal Can Package (H)
Bottom View
SOT23
TO-46
551833
551806
January 30, 2008
www.national.com

Related parts for LM285MX-1.2

LM285MX-1.2 Summary of contents

Page 1

... LM385M-1.2, LM385BM-1.2 LM385BXM-1.2 or LM385BYM-1.2 See NS Package Number M08A © 2008 National Semiconductor Corporation The LM185-1.2 is rated for operation over a −55°C to 125°C temperature range while the LM285-1.2 is rated −40°C to 85° C and the LM385-1.2 0°C to 70°C. The LM185-1.2/LM285-1.2 are available in a hermetic TO-46 package and the LM285-1 ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 2) Reverse Current Forward Current Operating Temperature Range (Note 3) LM185-1.2 LM285-1.2 LM385-1.2 Electrical Characteristics Parameter Conditions Reverse Breakdown T = 25°C, A ≤ ...

Page 3

Thermal Resistance θ (junction to ambient) JA θ (junction to case) JC Note 4: Parameters identified with boldface type apply at temperature extremes. All other numbers apply at T Note 5: Guaranteed and 100% production tested. Note 6: Guaranteed, but ...

Page 4

Reverse Dynamic Impedance Noise Voltage Response Time Typical Applications Wide Input Range Reference www.national.com 551817 551819 551821 551808 4 Reverse Dynamic Impedance 551818 Filtered Output Noise 551820 Micropower Reference from 9V Battery 551822 Reference from ...

Page 5

Battery 551823 Micropower* 5V Regulator ≃ 30μ Micropower* 10V Reference ≃20μA standby current *I Q Precision 1μA to 1mA Current Sources 551824 551825 5 551826 551827 www.national.com ...

Page 6

METER THERMOMETERS 0°C−100°C Thermometer Calibration 1. Short LM385-1.2, adjust R3 for I = temp at 1μA/°K OUT 2. Remove short, adjust R2 for correct reading in centigrade 0°F−50°F Thermometer Calibration 1. Short LM385-1.2, adjust R3 for I = temp at ...

Page 7

Calibration 1. Adjust R1 so that V1 = temp at 1mV/°K 2. Adjust V2 to 273.2mV †I for 1.3V to 1.6V battery volt- Q age = 50μA to 150μA Schematic Diagram Centigrade Thermometer 551801 551807 7 www.national.com ...

Page 8

Physical Dimensions Order Number LM185H-1.2, LM185H-1.2/883, LM185BXH-1.2, LM185BYH-1.2, LM285H-1.2, or LM285BXH-1.2 www.national.com inches (millimeters) unless otherwise noted TO-46 Metal Can Package (H) NS Package Number H02A SOT-23 Package (M3) Order Number LM385M3-1.2 NS Package Number MF03A 8 ...

Page 9

Small Outline (SO-8) Package Order Number LM285M-1.2, LM285BXM-1.2, LM285BYM-1.2 LM385M-1.2, LM385BM-1.2, LM385BXM-1.2, LM385BYM-1.2 NS Package Number M08A TO-92 Plastic Package (Z) Order Number LM285Z-1.2, LM285BXZ-1.2 LM285BYZ-1.2, LM385Z-1.2, LM385BZ-1.2 LM385BXZ-1.2 or LM385BYZ-1.2 NS Package Number Z03A 9 www.national.com ...

Page 10

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...

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