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LM185-1.2-N, LM285-1.2-N, LM385-1.2-N
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SNVS742E –JANUARY 2000–REVISED APRIL 2013
LM185-1.2-N/LM285-1.2-N/LM385-1.2-N Micropower Voltage Reference Diode
Check for Samples: LM185-1.2-N, LM285-1.2-N, LM385-1.2-N
Careful design of the LM185-1.2-N has made the
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FEATURES
device exceptionally tolerant of capacitive loading,
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• ±1% and 2% Initial Tolerance
making it easy to use in almost any reference
• Operating Current of 10μA to 20mA
application. The wide dynamic operating range allows
its use with widely varying supplies with excellent
• 1Ω Dynamic Impedance
regulation.
• Low Temperature Coefficient
The extremely low power drain of the LM185-1.2-N
• Low Voltage Reference—1.235V
makes it useful for micropower circuitry. This voltage
• 2.5V Device and Adjustable Device Also
reference can be used to make portable meters,
Available
regulators or general purpose analog circuitry with
• LM185-2.5 Series and LM185 Series,
battery life approaching shelf life.
respectively
Further, the wide operating current allows it to
replace older references with a tighter tolerance part.
DESCRIPTION
The LM185-1.2-N is rated for operation over a −55°C
The LM185-1.2-N/LM285-1.2-N/LM385-1.2-N are
to 125°C temperature range while the LM285-1.2-N is
micropower 2-terminal band-gap voltage regulator
rated −40°C to 85°C and the LM385-1.2-N 0°C to
diodes. Operating over a 10μA to 20mA current
70°C. The LM185-1.2-N/LM285-1.2-N are available in
range, they feature exceptionally low dynamic
a hermetic TO package and the LM285-1.2-N/LM385-
impedance and good temperature stability. On-chip
1.2-N are also available in a low-cost TO-92 molded
trimming is used to provide tight voltage tolerance.
package, as well as SOIC and SOT-23.
Since the LM185-1.2-N band-gap reference uses only
transistors and resistors, low noise and good long
term stability result.
CONNECTION DIAGRAM
Figure 1. T0-92 Package (LP)
(Bottom View)
Figure 3. SOIC Package
* Pin 3 is attached to the Die Attach Pad
(DAP) and should be connected to Pin 2 or
left floating.
Figure 2. SOT-23
Figure 4. TO Package (NDV)
(Bottom View)
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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